233 results on '"performance requirements"'
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2. Advances in artificial blood vessels: Exploring materials, preparation, and functionality
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Wang, Feng, Liang, Mengdi, Zhang, Bei, Li, Weiqiang, Huang, Xianchen, Zhang, Xicheng, Chen, Kaili, and Li, Gang
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- 2025
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3. Optimising Policy Synergies: The Role of Tax Incentives in International Trade and Investment
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Chaisse, Julien, Rossi, Ino, Series Editor, Mosquera Valderrama, Irma Johanna, editor, Heitmüller, Frederik, editor, Chaisse, Julien, editor, and Christians, Allison, editor
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- 2025
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4. 基于用户使用需求的性能开发体系研究.
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李坤远, 刘元治, 霍云龙, 张昶, 王燕, and 王天娇
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ELECTRIC vehicles ,ENERGY development ,VEHICLE models ,BIG data ,PRODUCT improvement - Abstract
Copyright of Automotive Digest is the property of Automotive Digest Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2024
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- View/download PDF
5. Alloy Systems for Additive Manufacturing
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Joshi, Sanjay, Martukanitz, Richard P., Nassar, Abdalla R., Michaleris, Pan, Joshi, Sanjay, Martukanitz, Richard P., Nassar, Abdalla R., and Michaleris, Pan
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- 2023
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6. Challenges and Optimization of Building-Integrated Photovoltaics (BIPV) Windows: A Review.
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Shi, Shaohang and Zhu, Ning
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PV windows are seen as potential candidates for conventional windows. Improving the comprehensive performance of PV windows in terms of electrical, optical, and heat transfer has received increasing attention. This paper reviews the development of BIPV façade technologies and summarizes the related experimental and simulation studies. Based on the results of the literature research, the average comprehensive energy-saving rate of BIPV façades can reach 37.18%. Furthermore, limitations and optimization directions of photovoltaic integrated shading devices (PVSDs), photovoltaic double-skin façades, and photovoltaic windows are presented. To improve the energy-saving potential of windows as non-energy efficiency elements of buildings, smart PV windows are proposed to be the key to breakthrough comprehensive performance. However, not all switchable windows concepts can be applied to PV windows. Typical studies on smart windows and PV windows are sorted out to summarize the challenges and optimization of smart PV window technical solutions. Considering the technological innovations in smart PV windows, two requirements of energy-saving materials and building envelopes are put forward. The advances in materials and the building envelope are complementary, which will promote the sophistication and promotion of solar building technology. [ABSTRACT FROM AUTHOR]
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- 2023
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7. Performance‐based approach in model code 2020: Working on future‐oriented standardization.
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Bigaj‐van Vliet, Agnieszka and Matthews, Stuart
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PERFORMANCE standards , *PERFORMANCE-based design , *REINFORCED concrete , *STRUCTURAL engineers , *STRUCTURAL engineering - Abstract
The vision for fib MC2020 is to go beyond the point reached by fib MC2010, recent ISO codes, such as ISO 16311, and the current Eurocode activities to extend the application of Eurocodes to existing structures. The contents of fib MC2020 suit these forward‐looking objectives, dealing both with the design of new structures and all the activities associated with the life‐cycle management of existing concrete structures including matters, such as in‐service assessment and interventions upon them, including situations where new structural members are incorporated as parts of existing structures. With the fib MC2020 adaptations taking sustainability as a fundamental requirement, defining implications for subsidiary performance requirements critical to structural design and assessment procedures, it is logical that Model Code 2020 explicitly introduces and consequently seeks to make use of performance‐based concepts. A focus on performance provides a potential way to better align the interests of owners, users, technical consultants (such as structural engineers, material engineers, etc.), contractors, as well as material suppliers and manufacturers. It is envisaged that implementing the concept of the performance‐based approach in design and assessment will encourage rational design and technological progress which will facilitate the creation of superior structures for future generations, by removing constraints to the use of novel types of concrete and reinforcing materials and offering possibilities for optimization of solutions that better fit the needs of stakeholders. This paper addresses the principles of the performance‐based approach to design and assessment and discusses the manner in which it has been introduced in fib MC2020. The benefits and burdens associated with the performance‐based approach and the traditional prescriptive approach to engineering specification are discussed, both from a technical and process/commercial/contractual point of view, to describe the overall benefits of the performance‐based approach. Finally, the future outlook for a coherent integration of the performance‐based approach in design and assessment is addressed, paving the way for further work on standardization for sustainable concrete structures. [ABSTRACT FROM AUTHOR]
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- 2023
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8. 基于卫星遥感及数据库同步的气象灾害监测预警系统设计.
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袁翔
- Abstract
Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2023
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9. Categories of Requirements
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Crowder, James A., Hoff, Curtis W., Crowder, James A., and Hoff, Curtis W.
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- 2022
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10. Performance Requirement Prohibitions in International Investment Law
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Collins, David, Chaisse, Julien, editor, Choukroune, Leïla, editor, and Jusoh, Sufian, editor
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- 2021
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11. Improved Design Closure of Compact Microwave Circuits by Means of Performance Requirement Adaptation
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Koziel, Slawomir, Pietrenko-Dabrowska, Anna, Leifsson, Leifur, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Paszynski, Maciej, editor, Kranzlmüller, Dieter, editor, Krzhizhanovskaya, Valeria V., editor, Dongarra, Jack J., editor, and Sloot, Peter M.A., editor
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- 2021
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12. 针织面料在消防制服设计中的应用.
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王巍巍
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TEXTILE industry ,PHYSICAL training & conditioning ,CLOTHING & dress ,FIRE fighters ,PULLOVERS (Sweaters) - Abstract
Copyright of China Textile Leader is the property of China Textile Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
13. Post-occupancy evaluation of research and academic laboratory facilities
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Hassanain, Mohammad A., Sanni-Anibire, Muizz O., Mahmoud, Abubakar Sadiq, and Ahmed, Wahhaj
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- 2020
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14. Flexible leadership in the manufacturing sector
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Alat, Priya and Suar, Damodar
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- 2020
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15. Indoor Localization Based on Radio and Sensor Measurements.
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Li, Yi and Yan, Kun
- Abstract
With a flourish of wireless technologies, indoor localization is becoming an emerging topic for crucial practical research including homeland security, police patrolling, machinery fault-detection, target tracking, etc. Generally speaking, indoor localization technology involves three primary types of methodologies, namely range-based localization, fingerprint-based localization and inertial localization. This paper is aimed to present an overview of these prominent indoor localization techniques and the state-of-the-art solutions. To manifest this important topic, the general localization mechanisms are analyzed. Finally, performance requirements such as accuracy, cost, robustness are presented for benchmarking localization system performances. [ABSTRACT FROM AUTHOR]
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- 2021
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16. International Investment Agreements and National Governance: The Case of Egypt.
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Raslan, Reem Anwar Ahmed
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FOREIGN investments ,TREATIES ,COMMERCIAL courts ,DISPUTE resolution ,OBEDIENCE (Law) ,PERSPECTIVE taking ,CONFLICT management - Abstract
The current international investment legal regime results from the interplay between international investment norms, embodied mainly in international investment agreements (IIAs), and the legal regime of the host country. This article will outline two major impacts IIAs can exert on national governance in Egypt: first, the domestic reform impact that refers to domestically initiated reform measures taken to compliment IIAs objectives, such as establishment of Economic Courts as well as limitation of third-party challenge of Investor–State contracts; and, second, the Supra-National Impact which involves situations where IIAs constrain the regulatory powers of the host state usually by imposing legal obligations that go beyond international standards, such as alternative dispute resolution (ADR) mechanisms as well as trade-related investment measures-plus (TRIMS-Plus) and trade-related aspects of intellectual property rights-plus (TRIPS-Plus) provisions. Understanding the profound effects of IIAs on national governance will beneficially inform policy makers when concluding IIAs. [ABSTRACT FROM AUTHOR]
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- 2021
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17. Designing tests to measure the susceptibility to movement balance according to the performance requirements of the girls' technical gymnastics.
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ABBOUB, HANAN ADNAN, KARIM, UDAY ABDEL-HUSSEIN, and KAMBASH, MAGDA HAMID
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GYMNASIUMS , *GYMNASTICS , *PHYSICAL education , *SPORTS sciences , *STUDENT attitudes - Abstract
The tests and measurements have a prominent role in discovering and diagnosing the most important points that point to the strength and weaknesses of students in the skill, physical and motor aspects in order to guide and enhance their capabilities as well as finding remedial methods for their weaknesses. The ability to kinetic balance is one of the important harmonic capabilities in the performance of many motor skills in the gymnasium. These compatibility capabilities are reflected in the quality of motor performance, the speed of kinetic learning and the ability to adapt mental kinetic programs to the changing conditions of performance and the aesthetic movement and the ability of kinetic balance is the ability of the individual to retain the body In a particular situation and the restoration of this situation in the event of deviation from it, and there is a relationship between compatibility and balance is one of the sections of harmonic ability and technical and rhythmic skills are considered practical activities that have a large side of Attention, as it is characterized by aesthetic and emotional obedience, the likable path to the soul, smoothness, and smoothness in performance. It earns its players the ability to the aesthetic taste of skill and self-confidence and develops a sense of harmony in the performance of multiple skills and beauty in performance and agility. Each sports game has special compatibility requirements that distinguish it from other games and these requirements are usually reflected in the specifications that must be met by those who play it, and from this, the importance of this research comes in designing tests to measure the ability of kinetic balance according to the performance requirements in your technical gymnasium, all skills in your technical gymnastics need to High mobility balance among female students. As for the research problem, lies in the lack of tests for measuring the ability to agree on the motor balance according to the performance requirements in your technical gymnastics, because this ability has great importance in many technical skills. As for the objectives of the research, they included: 1-Designing tests to measure the ability to conform to the motor balance according to the performance requirements in the technical gymnastics for students of the College of Physical Education and Sports Science. 2-Legalizing tests to measure the compatibility of kinematic balance according to the performance requirements in the technical gymnastics for students of the Faculty of Physical Education and Sports Science. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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18. The impact of superset training with resistances in developing some performance requirements for young handball players.
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Headan, Hussam Mohammed, Jasim, Alaa Ibrahim, and Jasim, Taha Abdulelah
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HANDBALL players , *PHYSICAL mobility , *HANDBALL , *AGE groups , *SPORTS - Abstract
Handball is a sport that has witnessed a remarkable development in recent years in all the requirements of physical and skill performance as the modern play ofvarious teams and international teams has been characterized by speed and strength in skilledperformance, which confirms the interest of coaches in the preparation of players during the training stages of teams, especially age groups in various physical, skilled and psychological aspects to prepare high-class players, the importanceofresearch in the study of one of thequality methodsmodern according to a careful analysis ofthe targeting of working muscle groups In the game khand and then put a group oftraining using the style of super set and show its impact on some requirements of physical and skilled performance,as the superset exercises modern orientation characterized by highlighting a great challenge to the difficulty of training within the same muscle group during the training dose, which makes its application scientifically considered an increase in the possibility of developing performance abilities in the game of handball. The researchers have prepared a research problem that can be highlighted by trying to keep up with the development of handball playersaccording to modern scientific and objective programs and programs. The study aimed to learnabout theimpact of superset exercises in some of the requirements of physical and professional performance of young handball players, and the time field from7/7/ 2020 to 1/10/2020 and representsthe humanfield ofthe youth players ofDiyala Handball Club Ammar (16-18)for thesports season 2019-2020, while the spatial field is the hall of the Directorate ofYouth andSports / Sports / Sports. [ABSTRACT FROM AUTHOR]
- Published
- 2021
19. INTERPRETATION AND APPLICATION OF INVESTMENT MEASURES IN PRACTICE OF INTERNATIONAL INVESTMENT ARBITRATION
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A. A. Danelyan and O. S. Magomedova
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investment measures ,performance requirements ,trims agreement ,wto ,nafta ,Law of nations ,KZ2-6785 ,Comparative law. International uniform law ,K520-5582 - Abstract
INTRODUCTION. Developing States are interested in both the inflow of foreign investment and its efficient use in their national economies. In the furtherance of this objective, host States set in their national legislation trade-related investment measures, referred to as “performance requirements” (requirements to achieve certain national economically useful results). The interests of foreign investors and host States in the matter of measures falling within the concept of “performance requirements” mostly diverge, since these measures create for foreign investors competitive restrictions related to the use of their investments. In legal science and practice there are known trade-related investment measures, such as export requirements, foreign exchange restrictions, local content requirements and others. The possibility for foreign investors to invest without performing trade-related investment measures was one of the main problems of transnational investment. The TRIMs agreement and Art. 1106 of NAFTA are devoted to the sole subject of regulation – “performance requirements”. The idea of limiting these measures was simultaneously discussed in the NAFTA negotiations and within the Uruguay round: the elaborated provisions are similar in some aspects, but have their specific characteristics. The article deals with the rules of both agreements in light of dispute settlement practice. The conclusions of the arbitrators are analyzed in chronological order, which helps to trace the evolution of the single concept in two distinct systems of WTO and NAFTA rules. The article demonstrates the common points and differences in the interpretation of the concerned provisions norms, with consideration for the context and objectives of the agreements. MATERIALS AND METHODS. The materials used in the article include the works of Russian and foreign scholars in the field of international economic law and WTO law, international legal documents adopted within the WTO and NAFTA, as well as materials of judicial and arbitration practice of investment disputes. The research was done on the basis of general and specific scientific methods of cognition (dialectical method, analysis and synthesis, deduction and induction, comparative legal and historical-legal methods). RESEARCH RESULTS. The analysis revealed that trade-related investment measures are part of the “performance requirements” listed in Art. 1106 of NAFTA, which developed countries managed to defend in negotiations with developing countries during the drafting of the TRIMs agreement. Despite the integrity of the concept of “investment requirements”, there is an evident difference in the scope of covered measures, as well as the conceptual difference between the notions of “trims” and “performance requirements”, due to the specifics of the WTO and NAFTA. Nevertheless, in both cases, common qualification criteria of prohibited measures have been developed independently from each other in the practice of investment disputes settlement in order to address similar issues of interpretation. DISCUSSION AND CONCLUSIONS. On the ground of the analysis of arbitration practice in the TRIMs and Art. 1106 of NAFTA, the article gives reasons for the conclusion of the parallel development of the concepts of “trade-related investment measures” and “performance requirements”.
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- 2019
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20. Det sociala stödets inverkan på skolrelaterad stress
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Hultmark, Hanna, Kantedal, Julia, Hultmark, Hanna, and Kantedal, Julia
- Abstract
Introduktion: Skolrelaterad stress är ett växande folkhälsoproblem som verkar som riskfaktor för unga personers psykiska ohälsa. Prestationer, relationer, krav samt tankar om framtiden beskrivs orsaka skolrelaterad stress. Socialt stöd är en resurs för hälsa och välbefinnande. Stressrelaterade sjukdomar kan leda till ökade samhällskostnader till följd av sjukskrivningar samt utebliven sysselsättning. Syfte: Syftet med studien är att studera det sociala stödets inverkan på skolrelaterad stress hos gymnasieelever i årskurs tre inom Västra Götalandsregionen samt om det skiljer sig åt mellan gymnasieprogram och kön. Metod: I en kvantitativ tvärsnittsstudie rekryterades 168 elever (>18 år) genom ett bekvämlighetsurval. Data samlades in via ett webbaserad enkätformulär och analyserades genom T-test och Chi-Square test samt korstabeller och deskriptiv statistik. Resultat:Den genomsnittliga stressnivån i studiepopulationen är 1.83 på en skala 0–3. Störst andel elever upplever medel stressnivå (48.8%) och det urskiljs skillnader mellan könen ochgymnasieprogrammen. Ledande orsak till skolrelaterad stress anges vara egnaprestationskrav (58%) och det finns en korrelation mellan prestationskrav och stressnivå. Vidare uppger 23.2% vara omedvetna om stöd i skolan och det finns skillnader mellan gymnasieprogrammen. Slutsats: Studien ger indikatorer på att skolrelaterad stress är ett växande problem och framtida forskning bör undersöka bakomliggande orsaker till elevers egna höga prestationskrav, detta i syfte att förebygga stress samt främja elevers hälsa och välbefinnande., Introduction: School-related stress is a growing public health problem that acts a risk factor for mental illness in young people. Achievements, relationships, demands and thoughts about the future have been described as causes of school-related stress. Social support is a resource for health and wellbeing. Stress-related illness can increase the social costs because of sick leave and unemployment. Aim: The aim of the study is to investigate the impact of social support on school-related stress in third-year secondary school students in Västra Götalandsregionen and whether it differs between secondary school programs and gender. Methods: In a quantitative cross-sectional study, 168 students (>18 years) where recruited through a convenience sample. Data were collected through a web-based questionnaire and analyzed using T-test and Chi-Square tests as well as crosstabulations and descriptive statistics. Results: The average stress level in the study population is 1.83 on a scale 0-3. The largest percentage of students (48.8%) experience a medium level of stress and there are differences between the sexes and the secondaryschool programs. The leading cause of school-related stress is reported to be individual performance expectations (58%) and there is a correlation between performance expectations and stress level. Furthermore, 23.2% state that they are unaware of support at school and there are differences between the secondary school programs. Conclusion: The study provides indicators that school-related stress is a growing problem and future research should investigate underlaying reasons for the students’ individual highperformance expectations with the aim of preventing stress and promoting health and wellbeing.
- Published
- 2023
21. AN INTEGRATED DESIGN PROCESS OF LOW-COST HOUSING IN CHILE.
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Trebilcock-Kelly, Maureen, Saelzer-Fica, Gerardo, and Bobadilla-Moreno, Ariel
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ENERGY consumption of buildings ,HOME prices ,PROFESSIONAL employees ,OCCUPANCY (Law) - Abstract
This paper discusses the application of Integrated Design Process for the design of low-cost housing in Chile. It aims to question common practice for the development of housing based on prescriptive regulations and non-interdisciplinary work, which has resulted in poor quality building requirements. The first stage consisted in defining performance requirements for aspects such as energy demand, U value, air tightness and indoor air quality for a specific case of low-cost houses located in the city of Temuco. An integrated design process was carried out by an interdisciplinary team of professionals specialized in each of the performance aspects that were taken into account. The construction and post-occupancy stages were characterized by verifying the performance requirements, which resulted in a low-cost house prototype that included strategies for energy efficiency and a healthy indoor environment. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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22. Test methods and requirements for fastening systems for concrete sleepers
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Vilotijević Milica, Popović Zdenka, and Lazarević Luka
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railway ,fastening systems ,laboratory test methods ,in service testing ,performance requirements ,harmonization ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
In order to realize interoperability of railway system, the reconstruction and modernization plan of railway network in the Republic of Serbia should be harmonized with technical requirements of European railway network. Performance requirements for fastening systems for concrete sleepers were analysed according to the adopted standard series SRPS EN 13481 and SRPS EN 13146. The aim of the paper is to introduce engineering public in Serbia with mentioned two standard series and to facilitate their practical implementation.
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- 2017
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23. Опера «Iyov» в українському музичному мистецтві XXI століття
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фортепіано ,експеримент ,experiment ,new opera ,piano ,vocal ,performance requirements ,опера ,виконавські вимоги ,«IYOV» ,opera ,нова опера ,вокал ,782.6 - Abstract
The features of the genre «new opera» are analyzed in the paper. The study is based on the coverage of the specifics of the opera «IYOV» by Roman Grigoriv and Ilia Razumeyko. It is noted that this work is a complex mixture of different styles of music. Composers combine elements of sacred ethnic music, variety music culture, academic music practice (minimalism). Although it is largely experimental, it presents new perspectives on the development of the opera genre. Unusual is the principle of performance, when singers combine vocalization with playing a musical instrument (prepared piano), which corresponds to the guidelines that were formed in the avant-garde academic music practice of the XX century. The principles embodied in the opera change the set design, because instead of mastering the space of the stage, there is a rallying at one point, which is usually tried to avoid the directors. During episodes when vocalists do not sing, they move away from the instrument and become face-to-face, closer to the stage. Actors themselves begin to perform fundamentally other functions. Their change is due to the principles that are present in the music theater of today. At the same time, there is a growing demand for performers who need to sing in different vocal ways, to attract extreme vocals, to participate in joint performance. An integral part of the opera action is the involvement of a casting engine that adds dynamics. The sign of a number of works that emerged in the early 21st century in the musical culture of Ukraine is the tendency to conceptualism. It is the author's intention that determines the consideration of those factors that acted as constant and unchanging in the musical work. It is worth mentioning not only the change in the form of the work, the appearance of features of other genres, set design, but also the number and composition of the instruments, the specifics of the musical content of the work., Проаналізовано особливості жанру «нова опера». Проведене дослідження базується на висвітленні специфіки опери «IYOV» Романа Григоріва та Іллі Разумейка. Зазначено, що даний твір являє собою складну суміш різних стильових напрямів музики. Попри те, що багато в чому він має експериментальний характер, він представляє нові перспективи розвитку оперного жанру. Для нього характерна зміна сценографії, камернізація виконавського складу, ущільнення тривалості. Разом з тим зростають вимоги до виконавців, які мають співати у різних вокальних манерах, залучати екстремальний вокал, брати участь у спільному перформансі. Невід’ємною частиною оперного дійства виступає залучення віджеїнгу, який додає динаміки.
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- 2023
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24. Evaluation of PNT Error Limits Using Real World Close Encounters from AIS Data
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Evelin Engler, Paweł Banyś, Hans-Georg Engler, Michael Baldauf, and Frank Sill Torres
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position ,navigation ,and timing data (PNT) ,automatic identification system (AIS) ,performance requirements ,collision avoidance ,Naval architecture. Shipbuilding. Marine engineering ,VM1-989 ,Oceanography ,GC1-1581 - Abstract
Collision avoidance is one of the main tasks on board ships to ensure safety at sea. To comply with this requirement, the direct ship environment, which is often modelled as the ship’s domain, has to be kept free of other vessels and objects. This paper addresses the question to which extent inaccuracies in position (P), navigation (N), and timing (T) data impact the reliability of collision avoidance. Employing a simplified model of the ship domain, the determined error bounds are used to derive requirements for ship-side PNT data provision. For this purpose, vessel traffic data obtained in the western Baltic Sea based on the automatic identification system (AIS) is analysed to extract all close encounters between ships considered as real-world traffic situations with a potential risk of collision. This study assumes that in these situations, erroneous data can lead to an incorrect assessment of the situation with regard to existing collision risks. The size of the error determines whether collisions are detected, spatially incorrectly assigned, or not detected. Therefore, the non-recognition of collision risks ultimately determines the limits of tolerable errors in the PNT data. The results indicate that under certain conditions, the probability of non-recognition of existing collision risks can reach non-negligible values, e.g., more than 1%, even though position accuracies are better than 10 m.
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- 2021
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25. A Study of Australian Glulam
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Milner, H. R., Adam, Con Y., Aicher, Simon, editor, Reinhardt, H.-W., editor, and Garrecht, Harald, editor
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- 2014
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26. Food Industry Perspectives on the Implementation of a PAT Strategy
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Johnsen, Julie Lundtoft, Barbosa-Cánovas, Gustavo V., Series editor, O'Donnell, Colm P., editor, Fagan, Colette, editor, and Cullen, P.J., editor
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- 2014
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27. Usability in RFP’s: The Current Practice and Outline for the Future
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Jokela, Timo, Laine, Juha, Nieminen, Marko, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Kurosu, Masaaki, editor
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- 2013
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28. DESIGN FOR MANUFACTURE MATRIX FOR OLDER WOMEN SHOES - CASE STUDIES.
- Author
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COSTEA, Mariana, MIHAI, Aura, and SEUL, Arina
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WOMEN'S shoes ,COMPUTER-aided design software ,FASHION designers ,PERFORMANCE evaluation ,PARALLEL algorithms ,SHOE design - Abstract
The Design for Manufacture (DSM) method allows product development and presentation of several other alternatives in a comparative form (matrix). It gives also the opportunity for the product to be analysed and to produce a flexible method to optimize it, by significantly reducing the costs. The process analysis by DSM requires data collection through technical document inspection and interviews with shoe designers. This could be an iterative and time consuming process. A deeper understanding of the system, usually results in changing the relationships between parameters. However, once the initial model is produced, it will be the basis for future developments. The analysed data for DSM were more accurate and fast collected because of the 3D and 2D CAD software used. Based on designed models for elderly women, the initial set of system/model's parameters were identified. The system's elements are not only physical components, but also performance requirements. The reason for including performance requirements in DSM matrix was to find their relationship with design parameters and to compare from this point of view, different model's design and finally to improve it. The selected products are more difficult to be designed because of their destination and the elderly feet characteristics. The main objectives of this study were to: determine the relationships among design parameters of the shoes for the elderly; obtain the DSM matrix which will be the basis for developing an algorithm to reorder design steps by following the specific parametric restrictions. To achieve an optimal parametric order and to identify the transition process, a partitioning algorithm developed by Pektas, S.T. in 2003 was used. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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29. The effect of social support on school-related stress
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Hultmark, Hanna and Kantedal, Julia
- Subjects
stress level ,hälsa ,prestationskrav ,health ,Public Health, Global Health, Social Medicine and Epidemiology ,social support ,school-related stress ,performance requirements ,skolrelaterad stress ,gymnasieelever ,socialt stöd ,Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi ,secondary school students ,stressnivå - Abstract
Introduktion: Skolrelaterad stress är ett växande folkhälsoproblem som verkar som riskfaktor för unga personers psykiska ohälsa. Prestationer, relationer, krav samt tankar om framtiden beskrivs orsaka skolrelaterad stress. Socialt stöd är en resurs för hälsa och välbefinnande. Stressrelaterade sjukdomar kan leda till ökade samhällskostnader till följd av sjukskrivningar samt utebliven sysselsättning. Syfte: Syftet med studien är att studera det sociala stödets inverkan på skolrelaterad stress hos gymnasieelever i årskurs tre inom Västra Götalandsregionen samt om det skiljer sig åt mellan gymnasieprogram och kön. Metod: I en kvantitativ tvärsnittsstudie rekryterades 168 elever (>18 år) genom ett bekvämlighetsurval. Data samlades in via ett webbaserad enkätformulär och analyserades genom T-test och Chi-Square test samt korstabeller och deskriptiv statistik. Resultat:Den genomsnittliga stressnivån i studiepopulationen är 1.83 på en skala 0–3. Störst andel elever upplever medel stressnivå (48.8%) och det urskiljs skillnader mellan könen ochgymnasieprogrammen. Ledande orsak till skolrelaterad stress anges vara egnaprestationskrav (58%) och det finns en korrelation mellan prestationskrav och stressnivå. Vidare uppger 23.2% vara omedvetna om stöd i skolan och det finns skillnader mellan gymnasieprogrammen. Slutsats: Studien ger indikatorer på att skolrelaterad stress är ett växande problem och framtida forskning bör undersöka bakomliggande orsaker till elevers egna höga prestationskrav, detta i syfte att förebygga stress samt främja elevers hälsa och välbefinnande. Introduction: School-related stress is a growing public health problem that acts a risk factor for mental illness in young people. Achievements, relationships, demands and thoughts about the future have been described as causes of school-related stress. Social support is a resource for health and wellbeing. Stress-related illness can increase the social costs because of sick leave and unemployment. Aim: The aim of the study is to investigate the impact of social support on school-related stress in third-year secondary school students in Västra Götalandsregionen and whether it differs between secondary school programs and gender. Methods: In a quantitative cross-sectional study, 168 students (>18 years) where recruited through a convenience sample. Data were collected through a web-based questionnaire and analyzed using T-test and Chi-Square tests as well as crosstabulations and descriptive statistics. Results: The average stress level in the study population is 1.83 on a scale 0-3. The largest percentage of students (48.8%) experience a medium level of stress and there are differences between the sexes and the secondaryschool programs. The leading cause of school-related stress is reported to be individual performance expectations (58%) and there is a correlation between performance expectations and stress level. Furthermore, 23.2% state that they are unaware of support at school and there are differences between the secondary school programs. Conclusion: The study provides indicators that school-related stress is a growing problem and future research should investigate underlaying reasons for the students’ individual highperformance expectations with the aim of preventing stress and promoting health and wellbeing.
- Published
- 2023
30. Recommended seismic performance requirements for building structures in Hong Kong.
- Author
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Hing-Ho Tsang
- Subjects
- *
EARTHQUAKE resistant design , *ACTION model (Communication) - Abstract
This paper provides recommendations for setting performance requirements for the seismic design of building structures in Hong Kong. Fundamental issues relating to the required level of structural safety will be addressed, which is then followed with a recommended seismic action model for structural design purposes in Hong Kong. The choice of suitable performance criteria of structures and the return period of the design seismic actions are first discussed. The development of the seismic hazard model for Hong Kong is then reviewed. The determination of the design response spectrum and the choice of design parameters for structures of different importance classes will also be presented. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
31. A systematic review of Prefabricated Enclosure Wall Panel Systems: Focus on technology driven for performance requirements.
- Author
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Correia Lopes, Gonçalo, Vicente, Romeu, Azenha, Miguel, and Ferreira, Tiago Miguel
- Subjects
WALL panels ,CURTAIN walls ,BUILDING envelopes ,ENERGY consumption of buildings ,SUSTAINABLE buildings - Abstract
Building envelopes are perhaps the most influencing players on assuring indoor comfort conditions, in alliance with their impact on the sustainability and energy-efficiency of the building during operation. However, given the multitude of commercial solutions available on the market and the use of different criteria and inconsistent semantics among the existing categorization/classification systems of construction objects, there is still a need for uniformisation of the many regarding the main Prefabricated Enclosure Wall Panel Systems (PEWPS) for building applications. In such context, this paper firstly explores the distinct categories of off-site Modern Methods of Construction (MMC), and how can they be classified. Secondly, focus will be given to panelised systems, where the classification of PEWPS is thoroughly investigated. Lastly, a summarised literature review of selected innovative research trends in advanced building envelopes is presented, with positive consequences on the comfort, energy and environmental performance of buildings. The purpose of this research is to provide a comprehensive framework to understand which singularities and challenges are associated with PEWPS; This set of tools should be accessible to designers (and construction stakeholders in general) to realise how each building solution is supposed to work on the road to fulfilling user requirements. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
32. A Power-Frequency Electric Field Sensor for Portable Measurement.
- Author
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Dongping Xiao, Qichao Ma, Yutong Xie, Qi Zheng, and Zhanlong Zhang
- Abstract
In this paper, a new type of electric field sensor is proposed for the health and safety protection of inspection staff in high-voltage environments. Compared with the traditional power frequency electric field measurement instruments, the portable instrument has some special performance requirements and, thus, a new kind of double spherical shell sensor is presented. First, the mathematical relationships between the induced voltage of the sensor, the output voltage of the measurement circuit, and the original electric field in free space are deduced theoretically. These equations show the principle of the proposed sensor to measure the electric field and the effect factors of the measurement. Next, the characteristics of the sensor are analyzed through simulation. The simulation results are in good agreement with the theoretical analysis. The influencing rules of the size and material of the sensor on the measurement results are summarized. Then, the proposed sensor and the matching measurement system are used in a physical experiment. After calibration, the error of the measurement system is discussed. Lastly, the directional characteristic of the proposed sensor is experimentally tested. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
33. Computing performance requirements for web service compositions
- Author
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García Domínguez, Antonio, Palomo Lozano, Francisco, Medina Bulo, Inmaculada, Ibias, Alfredo, Núñez García, Manuel, García Domínguez, Antonio, Palomo Lozano, Francisco, Medina Bulo, Inmaculada, Ibias, Alfredo, and Núñez García, Manuel
- Abstract
CRUE-CSIC (Acuerdos Transformativos 2022), In order to produce service compositions, modern web applications now combine both in-house and third-party web services. Therefore, their performance depends on the performance of the services that they integrate. At early stages, it may be hard to quantify the performance demanded from the services to meet the requirements of the application, as some services may not be available or may not provide performance guarantees. The authors present several algorithms that compute the required performance for each service from a model of a service composition at an early stage of development. This is also helpful when testing service compositions and selecting candidate web services, enabling performance-driven recommendation systems for web services that could be integrated into service discovery. Domain experts can annotate the model to include partial knowledge on the expected performance of the services. We develop a throughput computation algorithm and two time limit computation algorithms operating on such a model: a baseline algorithm, based on linear programming, and an optimised graph-based algorithm. We conduct theoretical and empirical evaluations of their performance and capabilities on a large sample of models of several classes. Results show that the algorithms can provide an estimation of the performance required by each service, and that the throughput computation algorithm and the graph-based time limit computation algorithm show good performance even in models with many paths., Ministerio de Ciencia e Innovación (MICINN)/FEDER, Comunidad de Madrid/FEDER, Depto. de Sistemas Informáticos y Computación, Fac. de Informática, TRUE, pub
- Published
- 2022
34. Consequences of using Quantitative Risk Assessment as a verification tool
- Author
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Öström, Joey and Öström, Joey
- Abstract
What are the consequences of using Quantitative risk assessment (QRA) as a verification tool? Performance-based building codes differ from prescriptive-based codes in that they define specific objectives to be met, enabling the building designer to choose which solution to use so long it meets the objectives. This master’s thesis explores the consequences of using QRA as a verification tool in comparison to existing verification methods currently in use in Australia. The thesis consists of a literature study examining currently existing quantitative risk-based methods, and a case study to test and illustrate the application of the proposed Part A8 of The Building Code of Australia (BCA) 2022, which contains quantitative risk criteria, followed by evaluation and analysis of the results. The study was limited to an already existing residential building with suggested fire safety measures. An event tree based QRA approach was used to quantify the individual and societal risk for the building. The results show that the already existing building meets most of the risk-based criteria of the proposed legislation. Improving the reliability of certain fire protection systems is shown to reduce the risk level for the building. The use of QRA to verify fire safety is expected to lead to a more holistic fire safety design and may lead to a more robust fire safety design. However, there are several challenges related to the use of QRA to verify fire safety in buildings.
- Published
- 2022
35. IoT's Tiny Steps towards 5G: Telco's Perspective.
- Author
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Cero, Enida, Husić, Jasmina Baraković, and Baraković, Sabina
- Subjects
- *
MOBILE communication systems , *INTERNET of things , *5G networks , *TELECOMMUNICATION systems , *COMMUNICATION infrastructure - Abstract
The numerous and diverse applications of the Internet of Things (IoT) have the potential to change all areas of daily life of individuals, businesses, and society as a whole. The vision of a pervasive IoT spans a wide range of application domains and addresses the enabling technologies needed to meet the performance requirements of various IoT applications. In order to accomplish this vision, this paper aims to provide an analysis of literature in order to propose a new classification of IoT applications, specify and prioritize performance requirements of such IoT application classes, and give an insight into state-of-the-art technologies used to meet these requirements, all from telco's perspective. A deep and comprehensive understanding of the scope and classification of IoT applications is an essential precondition for determining their performance requirements with the overall goal of defining the enabling technologies towards fifth generation (5G) networks, while avoiding over-specification and high costs. Given the fact that this paper presents an overview of current research for the given topic, it also targets the research community and other stakeholders interested in this contemporary and attractive field for the purpose of recognizing research gaps and recommending new research directions. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
36. Effective Use of Performance Requirements and Investment Incentive
- Author
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Zuzaan Boroo
- Subjects
performance requirements ,investment incentives ,employment and training requirements ,economic development objectives ,International relations ,JZ2-6530 - Abstract
This paper reviewed a theoretical background rationalizing performance requirements, particularly employment and training requirements which are used by host countries in conjunction with investment incentives as a FDI policy means to achieve economic objectives. And it discusses main observations from the study and proposes some policy alternatives helpful for the government of Mongolia to benefit from FDI through performance requirements in conjunction with investment incentives. DOI: http://dx.doi.org/10.5564/mjia.v0i17.86 Mongolian Journal of International Affairs, No.17 2012: 97-108
- Published
- 2013
- Full Text
- View/download PDF
37. Status of Revision of IEEE Std 1547 and 1547.1: Informal report based on IEEE P1547/Draft 5.0 (August 2016).
- Author
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Boemer, J. C., Huque, A., Seal, B., Key, T., Brooks, D., and Vartanian, C.
- Subjects
POWER resources ,PHOTOVOLTAIC power generation ,ELECTRIC power system stability ,TECHNOLOGICAL innovations - Abstract
The main interconnection standard for distributed energy resources (DER) in North America, IEEE Std 1547, is being revised. Originally developed assuming a low penetration of DER, the standard has been broadly adopted in the U.S. to guide the interconnection process. However technological and economic advances, especially within the distributed photovoltaics segment, have led to many cases of high penetration levels in the grid, hence, a need to update the standard. Testing and certification requirements are specified in IEEE Std 1547.1 and are also under revision. This article provides an informal report on the status of the revision of IEEE Stds 1547 and 1547.1. It presents the authors' individual views on the revision efforts and is not the formal position, explanation or position of the IEEE. The specific draft requirements are subject to changes during the standard's balloting process. [ABSTRACT FROM AUTHOR]
- Published
- 2016
38. Status of Revision of the VDE-AR-N 4105 Application Rule for the Connection of Distributed Generation to Low Voltage Networks.
- Author
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Suckow, Jan and Boemer, Jens C.
- Subjects
ELECTRIC potential ,POWER resources ,RENEWABLE energy sources ,PHOTOVOLTAIC power generation ,STANDARDIZATION - Abstract
The existing VDE-AR-N 4105 application rule for the connection of distributed generation has set an early standard for a better integration of distributed energy resources and is currently being revised. The revision process has started and involves key adaptation for requirements such as voltage stability and low voltage stability contribution. VDE∣FNN has published a roadmap and initiated studies to receive the necessary knowledge for the revision. The results have been published and are now being discussed in the relevant working group to be elaborated toward a general requirement for new DER installation. [ABSTRACT FROM AUTHOR]
- Published
- 2016
39. SlicedRAN: Service-Aware Network Slicing Framework for 5G Radio Access Networks
- Author
-
Ojaghi B., Adelantado F., Antonopoulos A., and Verikoukis C.
- Subjects
5G mobile communication systems ,Functional programming ,Mobile telecommunication systems ,Service requirements ,Network infrastructure ,Service level agreement (SLAs) ,Integer programming ,Radio access networks ,Remote radio heads ,Performance requirements ,Service-aware networks ,Mixed integer programming (MIP) ,Near-optimal solutions - Abstract
5G mobile networks are envisioned to substantiate new vertical services with diverse performance requirements. Slicing in the radio access network (RAN) promises an efficient solution for these diversified needs of 5G networks, which foresees the separation of the base station functionality between the central unit (CU) and the distributed remote radio heads. In this article, we formulate a mixed integer programming (MIP) framework that maximizes the throughput by jointly selecting the optimal functional split and the routing path from a connected user equipment to the CU, while satisfying the agreed service level agreements (SLAs) of each service. Furthermore, we propose an effective heuristic, SlicedRAN, which creates isolated RAN slices premised on the service requirements connected through a fronthaul/backhaul (FH/BH) network and obtains near-optimal solutions in a short computing time compared to the MIP framework. Our results show that there is a tradeoff between the architecture of the FH/BH network and the minimum SLA of each slice, which provides a solution to efficiently design a virtualized network infrastructure. According to the results, the SlicedRAN outperforms existing state-of-the-art up to 112% gain in throughput. Results are shown close to the optimal results, with a loss below 5%. © 2007-2012 IEEE.
- Published
- 2022
- Full Text
- View/download PDF
40. Striking the Right Balance Between the Interests of the Foreign Investors and the Host State - A Case Study of the Tanzania-Germany BIT 50 Years After Its Conclusion.
- Author
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Milej, Tomasz P.
- Subjects
INVESTORS ,INVESTMENT treaties ,INVESTMENT policy - Abstract
Fifty years ago, Tanzania and Germany concluded a bilateral investment treaty (BIT). The main features of this BIT differ from what is common today. The article examines the adequacy of the Treaty's stipulations against the backdrop of the controversies which the conclusion of the BITs has recently sparked in developing states and in Tanzania in particular. It discusses the nexus between the conclusion of the BITs and the inflow of foreign investments. As there is a general feeling among Tanzanian scholars that the BITs are too favourable to investors at the expense of local firms and legitimate policy objectives of the host state, various claims have been made with respect to the content of the investment treaties. Taking the Tanzania-Germany BIT as a case study, the article analyses these claims in the context of a global debate on the relationship between the need for the protection of foreign investors and sustainable development objectives. Finally, the future of the Tanzania-Germany BIT is discussed in the light of the post-Lisbon EU approach to the investment policy. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
41. Evaluation of the Capability of Automatic Dependent Surveillance Broadcast to Meet the Requirements of Future Airborne Surveillance Applications.
- Author
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Ali, Busyairah Syd, Schuster, Wolfgang, and Ochieng, Washington Yotto
- Subjects
- *
AUTOMATIC dependent surveillance-broadcast , *RADAR air traffic control systems , *AIR traffic , *SURVEILLANCE radar , *AIRPLANE radio equipment , *MANAGEMENT - Abstract
Automatic Dependent Surveillance Broadcast (ADS-B) Out supports various ground applications including Air Traffic Control (ATC) surveillance in radar airspace, non-radar airspace and on the airport surface. In addition, the capability of aircraft to receive ADS-B Out messages from other aircraft within their coverage (ADS-B In) enables enhanced airborne surveillance applications. The requirements of the application vary depending on its safety-criticality. More stringent applications will require higher levels of performance. It is therefore critical that the ADS-B system performance is measured against the most stringent application it is designed for. This paper reviews the various enhanced airborne surveillance applications and the required ADS-B information to support them. It identifies the ADS-B based applications required for Air Traffic Management (ATM) modernisation under the SESAR/NextGen programs. It discusses existing ADS-B Out versions and their capabilities. A mapping exercise is undertaken to assess the credibility of the ADS-B system performance to support the functionalities and requirements of the various enhanced airborne surveillance applications and establish those that require further research and development, highlighting some of the key challenges. [ABSTRACT FROM PUBLISHER]
- Published
- 2017
- Full Text
- View/download PDF
42. Research on Parameter Matching and Control Strategy of Load Isolation Pure Electric Driving Vehicles.
- Author
-
Hong, Jichao, Wang, Zhenpo, Liu, Peng, Zhang, Tiezhu, Yin, Huaixian, Huo, Wei, and Zhang, Hongxin
- Abstract
The pure electric vehicles and hybrid vehicles mostly use single battery pack for energy storage, which is easy to cause various battery problems. Moreover, short driving range and inconvenient charging are still the restrictive factors for the development and promotion of electric vehicles. A new kind of dynamic driving system was proposed in this paper -- Load isolated pure electric driving. According to the performance requirements of load isolated pure electric driving vehicle we made homologous parameter matching of the power system, and the driving system control strategy was carried on analysis based on the SOC of power batteries and the running conditions of vehicle. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
43. Polymeric Materials in Solar-thermal Systems - Performance Requirements and Loads.
- Author
-
Ramschak, Thomas, Hausner, Robert, and Fink, Christian
- Abstract
A major basic problem in selecting appropriate polymeric materials and processing technology routes is related to the lack of well-defined functional and performance requirements on the component level and to material property requirements on the specimen level. Hence, in a first step several reference climate regions were defined for pumped systems (continental (Graz/Austria), moderate climate (Beijing/China)) and non-pumped systems (Mediterranean (Athens/Greece), hot and dry (Pretoria/South Africa), hot and humid (Fortaleza/Brazil)), respectively. For each of these reference regions various solar-thermal plant types (e.g., domestic hot-water systems for single family houses (pumped and thermosiphon); domestic hot-water systems for multi-family houses; solar combi-systems for domestic hot-water and space heating (pumped) were pre-defined and evaluated and optimized virtually by modelling and simulation. To determine performance requirements on the component level and to derive material property requirements on the specimen level all-purpose modelling and design tools for collectors were implemented and used which allow for the description of temperature profiles, stagnation conditions, efficiency curves, pressure losses, distribution of fluid and heat flow and the thermal and hydraulic optimisation of the whole collector. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
44. A QUANTITATIVE PHYSIOGNOMIC ANALYSIS OF CONTEMPORARY FARM BUILDINGS TO IMPROVE AWARENESS IN RURAL PLANNING.
- Author
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Maino, E., Benni, S., Torreggiani, D., Barbaresi, A., and Tassinari, P.
- Subjects
- *
PHYSIOGNOMY , *FARM buildings , *RURAL planning , *LANDSCAPE design - Abstract
Ordinary citizens and stakeholders are gaining increasing awareness of rural landscapes as a common good, where architectural quality is an integral part of the environment. While historic rural buildings represent an acknowledged landscape value, this does not apply to contemporary buildings, which up to now have been considered service architecture to support the production of material goods. This study developed a method for analyzing the formal characteristics of contemporary farm building that adds quantitative aspects to the qualitative descriptions with the application of analytical tools. In particular, this work presents a validation and implementation of the methodological model Farm- BuiLD (Farm Building Landscape Design) through application to contemporary rural buildings (constructed after World War II) in the Emilia-Romagna region of Italy, as well as a study of the relationships between the formal features and functional requirements of contemporary rural architecture. The results show how the contemporary rural architecture is diversified in terms of shape, relationship with the surrounding landscape, and articulation or compactness. Physiognomic clusters were defined on the basis of joint interpretation of the results. They allowed definition of the correspondences between physiognomic characteristics and specific functional requirements expressed by users of the rural landscape. This research also shows how the application of analytical tools can increase knowledge of contemporary farm buildings. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
45. Impediments to organisational effectiveness: social defences and shame in the workplace
- Author
-
Flynn, Rosalie
- Published
- 2001
46. Fast Deployment of Reliable Distributed Control Planes With Performance Guarantees
- Author
-
Dejan Kostic, Shaoteng Liu, Rebecca Steinert, and Natalia Vesselinova
- Subjects
routability ,General Computer Science ,Computer science ,Distributed computing ,Control (management) ,02 engineering and technology ,Distributed control planes ,Bandwidth ,Teknik och teknologier ,0202 electrical engineering, electronic engineering, information engineering ,Software-defined networking ,General Materials Science ,Performance requirements ,distributed control plane ,Virtual network ,latency ,Guaranteed service ,reliability ,020208 electrical & electronic engineering ,General Engineering ,Performance guarantees ,020206 networking & telecommunications ,Optimization approach ,Programmable network ,Deployment strategy ,Software deployment ,controller placement problem ,Engineering and Technology ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,Current (fluid) ,Network condition ,optimization ,lcsh:TK1-9971 - Abstract
Current trends strongly indicate a transition towards large-scale programmable networks with virtual network functions. In such a setting, deployment of distributed control planes will be vital for guaranteed service availability and performance. Moreover, deployment strategies need to be completed quickly in order to respond flexibly to varying network conditions. We propose an effective optimization approach that automatically decides on the needed number of controllers, their locations, control regions, and traffic routes into a plan which fulfills control flow reliability and routability requirements, including bandwidth and delay bounds. The approach is also fast: The algorithms for bandwidth and delay bounds can reduce the running time at the level of 50x and 500x, respectively, compared to state-of-the-art and direct solvers such as CPLEX. Altogether, our results indicate that computing a deployment plan adhering to predetermined performance requirements over network topologies of various sizes can be produced in seconds and minutes, rather than hours and days. Such fast allocation of resources that guarantees reliable connectivity and service quality is fundamental for elastic and efficient use of network resources. Funding details: 671639; Funding details: VINNOVA, 2018-00735; Funding details: Stiftelsen för Strategisk Forskning, SSF, RIT15-0075; Funding text 1: This work was supported in part by the Swedish Foundation for Strategic Research (SSF) Time Critical Clouds under Grant RIT15-0075, in part by the Commission of the European Union in terms of the 5G-PPP COHERENT project under Grant 671639, and in part by the Celtic Plus 5G-PERFECTA (Vinnova) under Grant 2018-00735.
- Published
- 2020
- Full Text
- View/download PDF
47. Computing performance requirements for web service compositions.
- Author
-
García-Domínguez, Antonio, Palomo-Lozano, Francisco, Medina-Bulo, Inmaculada, Ibias, Alfredo, and Núñez, Manuel
- Subjects
- *
WEB services , *WEB-based user interfaces , *RECOMMENDER systems , *LINEAR programming , *ALGORITHMS - Abstract
In order to produce service compositions, modern web applications now combine both in-house and third-party web services. Therefore, their performance depends on the performance of the services that they integrate. At early stages, it may be hard to quantify the performance demanded from the services to meet the requirements of the application, as some services may not be available or may not provide performance guarantees. The authors present several algorithms that compute the required performance for each service from a model of a service composition at an early stage of development. This is also helpful when testing service compositions and selecting candidate web services, enabling performance-driven recommendation systems for web services that could be integrated into service discovery. Domain experts can annotate the model to include partial knowledge on the expected performance of the services. We develop a throughput computation algorithm and two time limit computation algorithms operating on such a model: a baseline algorithm, based on linear programming, and an optimised graph-based algorithm. We conduct theoretical and empirical evaluations of their performance and capabilities on a large sample of models of several classes. Results show that the algorithms can provide an estimation of the performance required by each service, and that the throughput computation algorithm and the graph-based time limit computation algorithm show good performance even in models with many paths. • Three algorithms that compute performance for each service from a model of a service composition. • Algorithms work in a context with incomplete information concerning performance of services. • Empirical evaluation shows good performance of the algorithms, even in models with many paths. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
48. On the role of transmission electron microscopy for precipitation analysis in metallic materials
- Author
-
Zhou, Tao, Babu, Prasath Revathy, Hou, Ziyong, Hedström, Peter, Zhou, Tao, Babu, Prasath Revathy, Hou, Ziyong, and Hedström, Peter
- Abstract
Precipitation hardening is one of the most important strengthening mechanisms in metallic materials, and thus, controlling precipitation is often critical in optimizing mechanical performance. Also other performance requirements such as functional and degradation properties are critically depending on precipitation. Control of precipitation in metallic materials is, thus, vital, and the approach presently in the limelight for this purpose is an integrated approach of theory, computations and experimental characterization. An empirical understanding is essential to build physical models upon and, furthermore, quantitative experimental data is needed to build databases and to calibrate the models. The most versatile tool for precipitation characterization is the transmission electron microscope (TEM). The TEM has sufficient resolving power to image even the finest precipitates, and with TEM-based microanalysis, overall quantitative data such as particle size distribution, volume fraction and number density of particles can be gathered. Moreover, details of precipitate structure, morphology and chemistry, can be revealed. TEM-based postmortem and in situ analysis of precipitation has made significant progress over the last decade, largely stimulated by the widespread application of aberration corrected microscopes and accompanying novel analytics. The purpose of this report is to review these recent developments in precipitation analysis methodology, including sample preparation. Application examples are provided for precipitation analysis in metals, and future prospects are discussed., QC 20220331
- Published
- 2021
- Full Text
- View/download PDF
49. Two-dimensional transport analysis of transdermal drug absorption with a non-perfect sink boundary condition at the skin-capillary interface
- Author
-
Universidad EAFIT. Departamento de Ciencias, Lógica y Computación, Simon, Laurent, Ospina, Juan, Universidad EAFIT. Departamento de Ciencias, Lógica y Computación, Simon, Laurent, and Ospina, Juan
- Abstract
A transient percutaneous drug absorption model was solved in two dimensions. Clearance of the topically-applied pharmaceutical occured at the skin-capillary boundary. Timolol penetration profiles in the dermal tissue were produced revealing concentration gradients in the directions normal and parallel to the skin surface. Ninety-eight percent of the steady-state flux was reached after 85. h or four time constants. The analytical solution procedure agreed with published results. As the clearance rate increased relative to diffusion, the delivery rate and amount of drug absorbed into the bloodstream increased while the time to reach the equilibrium flux decreased. Researchers can apply the closed-form expressions to simulate the process, estimate key parameters and design devices that meet specific performance requirements. © 2013 Elsevier Inc.
- Published
- 2021
50. Agile Elicitation of Scalability Requirements for Open Systems: A Case Study
- Author
-
Antonio Martini, Gunnar Brataas, Georg Ræder, and Geir Kjetil Hanssen
- Subjects
FOS: Computer and information sciences ,Computer science ,C.4 ,Legacy system ,Artifact (software development) ,Workload charaterization ,Computer Science - Software Engineering ,Coordination theory ,Performance requirements ,Open systems ,Design science ,D.2.1 ,Computer Science - Performance ,SIMPLE (military communications protocol) ,business.industry ,Requirements engineering ,Non-functional requirements ,Software Engineering (cs.SE) ,Performance (cs.PF) ,Software performance engineering ,Hardware and Architecture ,Scalability ,Key (cryptography) ,Design science research ,Software engineering ,business ,Agile software development ,Quality requirements ,Software ,Information Systems - Abstract
Eliciting scalability requirements during agile software development is complicated and poorly described in previous research. This article presents a lightweight artifact for eliciting scalability requirements during agile software development: the ScrumScale model. The ScrumScale model is a simple spreadsheet. The scalability concepts underlying the ScrumScale model are clarified in this design science research, which also utilizes coordination theory. This paper describes the open banking case study, where a legacy banking system becomes open. This challenges the scalability of this legacy system. The first step in understanding this challenge is to elicit the new scalability requirements. In the open banking case study, key stakeholders from TietoEVRY spent 55 hours eliciting TietoEVRY's open banking project's scalability requirements. According to TietoEVRY, the ScrumScale model provided a systematic way of producing scalability requirements. For TietoEVRY, the scalability concepts behind the ScrumScale model also offered significant advantages in dialogues with other stakeholders., 36 pages, 7 figures, 6 tables, accepted for publication in Journal of Systems and Software
- Published
- 2021
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