17 results on '"contract law"'
Search Results
2. On the formation of Dodd-Frank Act derivatives regulations.
- Author
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Mankad, Shawn, Michailidis, George, and Kirilenko, Andrei
- Subjects
DODD-Frank Wall Street Reform & Consumer Protection Act - Abstract
Following the 2007-2009 financial crisis, governments around the world passed laws that marked the beginning of new period of enhanced regulation of the financial industry. These laws called for a myriad of new regulations, which in the U.S. are created through the so-called notice-and-comment process. Through examining the text documents generated through this process, we study the formation of regulations to gain insight into how new regulatory regimes are implemented following major laws like the landmark Dodd-Frank Wall Street Reform and Consumer Protection Act. Due to the variety of constituent preferences and political pressures, we find evidence that the government implements rules strategically to extend the regulatory boundary by first pursuing procedural rules that establish how economic activities will be regulated, followed by specifying who is subject to the procedural requirements. Our findings together with the unique nature of the Dodd-Frank Act translate to a number of stylized facts that should guide development of formal models of the rule-making process. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
3. The continuing evolution of ownership.
- Author
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Hartley, Tilman
- Subjects
- *
PSYCHOLOGICAL ownership , *BIOLOGICAL evolution , *AGRICULTURE , *HOMINIDS , *ANIMAL behavior , *EUKARYOTES - Abstract
The evolution in animals of a first possession convention, in which individuals retain what they are the first to acquire, has often been taken as a foundation for the evolution of human ownership institutions. However, among humans, individuals actually only seldom retain an item they have acquired from the environment, instead typically transferring what they possess to other members of the community, to those in command, or to those who hold a contractual title. This paper presents a novel game-theoretic model of the evolution of ownership institutions as rules governing resource transfers. Integrating existing findings, the model contributes a new perspective on the emergence of communal transfers among hominin large game hunters around 200,000 years ago, of command ownership among sedentary humans in the millennia prior to the transition to agriculture, and of titled property ownership around 5,500 years ago. Since today’s property institutions motivate transfers through the promise of future returns, the analysis presented here suggests that these institutions may be placed under considerable pressure should resources become significantly constrained. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
4. Analysis of elite soccer players’ performance before and after signing a new contract.
- Author
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Gómez, Miguel-Ángel, Lago, Carlos, Gómez, María-Teresa, and Furley, Philip
- Subjects
- *
SOCCER players , *FOOTBALL players , *PROFESSIONAL sports contracts , *CLUSTER analysis (Statistics) , *CONTRACTS - Abstract
The aim of the current study was to analyse performance differences of football players 2-years prior and the year after signing a new contract (the following year) while taking playing position, nationality, player’s role, team ability, and age into account. The sample was comprised of 249 players (n = 109 defenders, n = 113 midfielders; and n = 27 forwards) from four of the major European Leagues (Bundesliga, English FA Premier League, Ligue 1, and La Liga) during the seasons 2008 to 2015. The dependent variables studied were: shooting accuracy, defense (the sum of defensive actions, tackles, blocks, and interceptions), yellow cards, red cards, passing accuracy, tackle success, and minutes played per match. Two-step cluster analysis allowed classifying the sample into three groups of defenders (national important, foreign important, and less important players) and four groups of midfielders and forwards (national important, foreign important, national less important, and foreign less important players). Magnitude Based Inference (MBI) was used to test the differences between player’s performances during the years of analyses. The main results (very likely and most likely effects) showed better performance in the year prior to signing a new contract than the previous year for foreign important defenders (decreased number of red cards), national important midfielders (increased number of minutes played), foreign important forwards (increased minutes played and defense), and national important forwards (increased minutes played). In addition, performance was lower the year after signing the contract compared to the previous one for less important defenders (decreasing defense), national less important midfielders (decreased minutes played), and foreign less important forwards (decreased defense). On the other hand, the players showed better performance in defense and more minutes played the year after signing the contract for less important defenders, national less important midfielders, and foreign less important forwards. These results may assist coaches to decide on when a new contract should be signed or the duration of the contract. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
5. Beyond financial conflicts of interest: Institutional oversight of faculty consulting agreements at schools of medicine and public health.
- Author
-
Mello, Michelle M., Murtagh, Lindsey, Joffe, Steven, Taylor, Patrick L., Greenberg, Yelena, and Campbell, Eric G.
- Subjects
- *
PUBLIC health , *INTELLECTUAL property , *MEDICAL education , *MEDICAL humanities , *SCIENCE & state - Abstract
Importance: Approximately one-third of U.S. life sciences faculty engage in industry consulting. Despite reports that consulting contracts often impinge on faculty and university interests, institutional approaches to regulating consulting agreements are largely unknown. Objective: To investigate the nature of institutional oversight of faculty consulting contracts at U.S. schools of medicine and public health. Design: Structured telephone interviews with institutional administrators. Questions included the nature of oversight for faculty consulting agreements, if any, and views about consulting as a private versus institutional matter. Interviews were analyzed using a structured coding scheme. Setting: All accredited schools of medicine and public health in the U.S. Participants: Administrators responsible for faculty affairs were identified via internet searches and telephone and email follow-up. The 118 administrators interviewed represented 73% of U.S. schools of medicine and public health, and 75% of those invited to participate. Intervention: Structured, 15–30 minute telephone interviews. Main outcomes and measures: Prevalence and type of institutional oversight; responses to concerning provisions in consulting agreements; perceptions of institutional oversight. Results: One third of institutions (36%) required faculty to submit at least some agreements for institutional review and 36% reviewed contracts upon request, while 35% refused to review contracts. Among institutions with review, there was wide variation the issues covered. The most common topic was intellectual property rights (64%), while only 23% looked at publication rights and 19% for inappropriately broad confidentiality provisions. Six in ten administrators reported they had no power to prevent faculty from signing consulting agreements. Although most respondents identified institutional risks from consulting relationships, many maintained that consulting agreements are “private.” Conclusions and relevance: Oversight of faculty consulting agreements at U.S. schools of medicine and public health is inconsistent across institutions and usually not robust. The interests at stake suggest the need for stronger oversight. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
6. Barriers and facilitators to adoption and use of fuel pellets and improved cookstoves in urban Rwanda.
- Author
-
Seguin, Ryan, Flax, Valerie L., and Jagger, Pamela
- Subjects
- *
WOOD pellets , *BIOMASS stoves , *URBAN planning , *COMMUNICATION - Abstract
Background: The environmental and health impacts of reliance on solid fuels and traditional cookstoves in low-income countries have motivated the promotion of household cooking energy systems that use cleaner burning fuels and cookstoves that lead to reduced exposure to harmful pollutants. Little is known about adoption and use of such systems from the users’ perspective. Methods: We explored the facilitators and barriers to adoption and use of a private sector marketed household cooking energy system that uses sustainably produced biomass pellets and the cleanest burning fan micro-gasification stove currently available. We conducted 48 in-depth qualitative interviews in Gisenyi, Rwanda with decision-makers and cooks in 16 households that adopted the improved cookstove system and 8 non-adopter households. Results: Reported facilitators and barriers to adoption and non-adoption, as well as use and non-use were complex, and in some cases, contradictory. Some adopters noted that cleanliness and low smoke production were major facilitators to adoption and use, while other adopters and non-adopters said the cookstoves blackened and damaged cooking pots and produced excessive smoke. Our findings suggest that correct use of the stove mediates user experience. Cost was likewise reported as a facilitator among some adopters and a barrier among other adopters and non-adopters. Peer influence played a significant role as both a barrier and a facilitator to adoption and transcended other factors. Positive peer influence describing the cleanliness, affordability, and efficiency of the cookstove system encouraged adoption and use, while negative comments by peers regarding excessive smoke and damaged cooking pots discouraged adoption. Commentaries by some participants suggest that inadequate training and instruction may be primary causes of the discrepancies. Conclusion: Cost, cleanliness, communication among peer networks, and adequate training and instruction are important factors associated with the adoption and use of improved cookstoves and should be prioritized in the implementation of improved cookstove programs. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
7. Unbounded and revocable hierarchical identity-based encryption with adaptive security, decryption key exposure resistant, and short public parameters.
- Author
-
Xing, Qianqian, Wang, Baosheng, Wang, Xiaofeng, and Tao, Jing
- Subjects
- *
CRYPTOSYSTEMS , *DATA encryption , *THEORY of knowledge , *COMPUTER simulation , *PROBABILITY theory - Abstract
Revocation functionality and hierarchy key delegation are two necessary and crucial requirements to identity-based cryptosystems. Revocable hierarchical identity-based encryption (RHIBE) has attracted a lot of attention in recent years, many RHIBE schemes have been proposed but shown to be either insecure or bounded where they have to fix the maximum hierarchical depth of RHIBE at setup. In this paper, we propose a new unbounded RHIBE scheme with decryption key exposure resilience and with short public system parameters, and prove our RHIBE scheme to be adaptively secure. Our system model is scalable inherently to accommodate more levels of user adaptively with no adding workload or restarting the system. By carefully designing the hybrid games, we overcome the subtle obstacle in applying the dual system encryption methodology for the unbounded and revocable HIBE. To the best of our knowledge, this is the first construction of adaptively secure unbounded RHIBE scheme. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
8. Design, monitoring and evaluation of a direct payments approach for an ecotourism strategy to reduce illegal hunting and trade of wildlife in Lao PDR.
- Author
-
Eshoo, Paul Frederick, Johnson, Arlyne, Duangdala, Sivilay, and Hansel, Troy
- Subjects
- *
ECOTOURISM , *HUNTING , *PAYMENT , *NATIONAL protected areas systems , *BIODIVERSITY conservation , *COMMERCE - Abstract
Ecotourism as a strategy for achieving biodiversity conservation often results in limited conservation impact relative to its investment and revenue return. In cases where an ecotourism strategy has been used, projects are frequently criticized for not providing sufficient evidence on how the strategy has reduced threats or improved the status of the biodiversity it purports to protect. In Lao PDR, revenue from ecotourism has not been directly linked to or dependent on improvements in biodiversity and there is no evidence that ecotourism enterprises have contributed to conservation. In other developing countries, direct payments through explicit contracts in return for ecosystem services have been proposed as a more cost-effective means for achieving conservation, although further research is needed to evaluate the impact of this approach. To address this need, a new model was tested in the Nam Et-Phou Louey National Protected Area (NPA) in Lao PDR using a direct payments approach to create ecotourism incentives for villagers to increase wildlife populations. Over a four-year period, we monitored along a theory of change to evaluate assumptions about the linkages between intermediate results and biological outcomes. Preliminary results show a negative correlation between ecotourism benefits and hunting infractions in target villages; no increase in hunting sign in the ecotourism sector of the NPA relative to a three-fold increase in hunting sign across the NPA’s non-tourism sectors; and an overall increase in wildlife sightings. This case provides key lessons on the design of a direct payments approach for an ecotourism strategy, including how to combine threat monitoring and data on wildlife sightings to evaluate strategy effectiveness, on setting rates for wildlife sightings and village fees, and the utility of the approach for protecting very rare species. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
9. Reasons for encounter and health problems managed by general practitioners in the rural areas of Beijing, China: A cross-sectional study.
- Author
-
Liu, Yanli, Chen, Chao, Jin, Guanghui, Zhao, Yali, Chen, Lifen, Du, Juan, and Lu, Xiaoqin
- Subjects
- *
GENERAL practitioners , *RURAL health services , *COMMUNITY health services , *MEDICAL consultation , *HYPERTENSION - Abstract
Objective: The purpose of this study was to describe the patients’ reasons for encounter (RFE) and health problems managed by general practitioners (GPs) in the rural areas of Beijing to provide evidences for health services planning and GPs training. Methods: This study was conducted at 14 community health service centers (CHSCs) in 6 suburban districts of Beijing, using a multistage sampling method. A total of 100 GPs was selected from the study sites. A self-designed data collection form was developed on the basis of Subjective-Objective-Assessment-Plan (SOAP), including patient characteristics, RFEs, health problems, interventions, and consultation length. Each GP recorded and coded their 100 consecutive patients’ RFEs and health problems with the International Classification of Primary Care, 2nd version (ICPC-2). Descriptive statistics were employed to describe the distribution of RFE and health problems. Student t-test and analysis of variance were used to compare the differences of mean number of RFE or health problems per encounter by patient characteristics. Results: A total of 10,000 patient encounters with 13,705 RFEs and 15,460 health problems were recorded. The RFEs and health problems were mainly distributed in respiratory, circulatory, musculoskeletal, endocrine, metabolic and nutritional, and digestive systems. Cough and hypertension were the most common RFE and health problem, respectively. With increased ages, the mean number of RFEs decreased and the mean number of health problems increased. Patients with Beijing medical insurance had less RFEs and more health problems than those in other cities (p<0.001). Patients who had visited the CHSC previously and signed contracts with the GP team had more health problems than those who had not (p<0.001). Conclusions: These findings present a view of patients’ demands and work contents of GPs in Beijing rural areas and can provide reference for health services planning and GPs training. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
10. Towards an open and decentralized case law curation ecosystem
- Author
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Eleni Panagou and Manolis Vavalis
- Subjects
Computer and Information Sciences ,Process management ,Leverage (finance) ,Blockchain ,Computer science ,Economics ,Science ,media_common.quotation_subject ,Common law ,Social Sciences ,Proof of Concept Study ,Computer Applications ,Ecosystems ,Preliminary analysis ,Voting ,Legal profession ,media_common ,Data Management ,Metadata ,Jurisprudence ,Multidisciplinary ,Ecology ,Organic Compounds ,Organic Chemistry ,Ecology and Environmental Sciences ,Chemical Compounds ,Biology and Life Sciences ,Software Engineering ,Chemistry ,Contract Law ,Proof of concept ,Physical Sciences ,Web-Based Applications ,Cryptography ,Medicine ,Engineering and Technology ,Law and Legal Sciences ,Programming Languages ,Sources of law ,Finance ,Mathematics ,Research Article ,Ethers - Abstract
Case law is the term that refers to reports of past court decisions. It is considered an essential source of law, vital for legal professionals. Existing case law services are currently centralized, with an entity having complete control over the data and often charging fees for its access and other adding value services. This paper attempts to leverage the potential of blockchain technology in order to develop a public and decentralized platform that allows the submission of court decisions in a decentralized database and employs a network of curators who offer their validation, classification, and evaluation. Specifically, we design, analyze and implement AnyCase, a proof-of-concept prototype system on the Ethereum platform. We focus on the establishment of a sybil-resistant voting protocol used for reaching agreement and the development of a tokenized economy that incentivizes participation. Our preliminary analysis indicates that, besides being decentralized, AnyCase has the potential to compete with existing centralized systems in several other aspects.
- Published
- 2020
11. Secure and reliable blockchain-based eBook transaction system for self-published eBook trading
- Author
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Jeonghee Chi, So Young Park, Jangyeon Lee, Jeewoo Choi, and Na kyung Kim
- Subjects
Computer science ,Economics ,Encryption ,Social Sciences ,Cryptography ,02 engineering and technology ,Intellectual property ,computer.software_genre ,0202 electrical engineering, electronic engineering, information engineering ,Confidentiality ,Payment ,Computer Networks ,media_common ,Multidisciplinary ,Applied Mathematics ,Simulation and Modeling ,Authorization ,Commerce ,Intellectual Property ,Physical Sciences ,ComputingMethodologies_DOCUMENTANDTEXTPROCESSING ,Medicine ,020201 artificial intelligence & image processing ,Commercial Law ,Algorithms ,Research Article ,Direct Payments ,Computer and Information Sciences ,Blockchain ,media_common.quotation_subject ,Science ,Computer security ,Research and Analysis Methods ,Humans ,Computer Security ,Publishing ,Authentication ,Internet ,business.industry ,Books ,020206 networking & telecommunications ,Cryptographic protocol ,Contract Law ,Algebra ,Law and Legal Sciences ,business ,computer ,Database transaction ,Algebraic Geometry ,Mathematics - Abstract
As eBook readers have expanded on the market, various online eBook markets have arisen as well. Currently, the online eBook market consists of at least publishers and online platform providers and authors, and these actors inevitably incur intermediate costs between them. In this paper, we introduce a blockchain-based eBook market system that enables self-published eBook trading and direct payments from readers to authors without any trusted party; because authors publish themselves and readers purchase directly from authors, neither actor incurs any intermediate costs. However, because of this trustless environment, the validity, ownership and intellectual property of digital contents cannot be verified and protected, and the safety of purchase transactions cannot be ensured. To address these shortcomings, we propose a secure and reliable eBook transaction system that satisfies the following security requirements: (1) verification of the ownership of each eBook, (2) confidentiality of eBook contents, (3) authorization of a right to read a book, (4) authentication of a legitimate purchaser, (5) verification of the validity and integrity of eBook contents, (6) safety of direct purchase transactions, and (7) preventing eBook piracy and illegal distribution. We provide practical cryptographic protocols for the proposed system and analyze the security and simulated performance of the proposed schemes.
- Published
- 2020
12. Group contracts and sustainability: Experimental evidence from smallholder seed production
- Author
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Yashodha, Prakashan Chellattan Veettil, and Judit Johny
- Subjects
Economics ,Social Sciences ,Plant Science ,Agricultural science ,Information asymmetry ,media_common ,Farmers ,Multidisciplinary ,Plant Anatomy ,Eukaryota ,food and beverages ,Agriculture ,Sustainable Development ,Plants ,Agricultural Methods ,Investment (macroeconomics) ,Professions ,Incentive ,Experimental Organism Systems ,Seeds ,Medicine ,Agricultural Workers ,Research Article ,Science ,media_common.quotation_subject ,Research and Analysis Methods ,Sustainability Science ,Agricultural Production ,Plant and Algal Models ,Production (economics) ,Asymmetric Information ,Grasses ,Contract farming ,Probability ,Proportional Hazards Models ,Ecology and Environmental Sciences ,Organisms ,Sustainability science ,Biology and Life Sciences ,Oryza ,Information Economics ,Payment ,Contract Law ,People and Places ,Animal Studies ,Population Groupings ,Law and Legal Sciences ,Rice ,Business ,Welfare - Abstract
Contract farming in seed production has played an instrumental role in bringing private investment into seed research and production. As developing countries have predominantly small and marginal farmers, the number of inefficiencies that arise from seed contractual agreements hinders producers from realizing the full potential benefits from seed contracts. We carried out an economic experiment with real producers and organizers currently engaged in seed production to analyze their preference for group seed contracts, its sustainability and welfare implications in the seed value chain. The producers are offered two types of group contracts: B and C. Contract B involves a company-organizer-seed producer group (SPG) whereas contract C removes the organizer and directly engages with the SPG (company → SPG). In the experiment, producers are asked to choose between an existing contract and either of the proposed group contracts. The experiment consists of two treatments: (i) concealed and revealed price information between agents, and (ii) presence and absence of a local organizer while making the decision. We find that the preference for group contract B is higher than for group contract C, suggesting the need for producers bargaining which can be achieved through group contract in the existing contract, Bargaining is high (6.3 percentage points) when price information is concealed. SPGs survive for about four out of five rounds and more than half of the groups (53%) formed in the first round survived throughout the five rounds, indicating a very high group sustainability.
- Published
- 2021
- Full Text
- View/download PDF
13. Beyond financial conflicts of interest: Institutional oversight of faculty consulting agreements at schools of medicine and public health
- Author
-
Yelena Greenberg, Eric G. Campbell, Steven Joffe, Lindsey Murtagh, Patrick L. Taylor, and Michelle M. Mello
- Subjects
Biomedical Research ,Public Administration ,Economics ,lcsh:Medicine ,Social Sciences ,Contracts ,Intellectual property ,01 natural sciences ,0302 clinical medicine ,Sociology ,Medicine and Health Sciences ,Relevance (law) ,Confidentiality ,Public and Occupational Health ,030212 general & internal medicine ,lcsh:Science ,Research Integrity ,Schools, Medical ,Multidisciplinary ,Schools ,Publications ,Public relations ,Intellectual Property ,The Internet ,Public Health ,Commercial Law ,Research Article ,medicine.medical_specialty ,Faculty, Medical ,Science Policy ,Political Science ,education ,Biological Science Disciplines ,Education ,Power (social and political) ,03 medical and health sciences ,Political science ,medicine ,Humans ,Industry ,0101 mathematics ,Accreditation ,business.industry ,Conflict of Interest ,Public health ,lcsh:R ,010102 general mathematics ,Intervention (law) ,Contract Law ,Medical Education ,lcsh:Q ,Law and Legal Sciences ,business ,Medical Humanities ,Finance - Abstract
ImportanceApproximately one-third of U.S. life sciences faculty engage in industry consulting. Despite reports that consulting contracts often impinge on faculty and university interests, institutional approaches to regulating consulting agreements are largely unknown.ObjectiveTo investigate the nature of institutional oversight of faculty consulting contracts at U.S. schools of medicine and public health.DesignStructured telephone interviews with institutional administrators. Questions included the nature of oversight for faculty consulting agreements, if any, and views about consulting as a private versus institutional matter. Interviews were analyzed using a structured coding scheme.SettingAll accredited schools of medicine and public health in the U.S.ParticipantsAdministrators responsible for faculty affairs were identified via internet searches and telephone and email follow-up. The 118 administrators interviewed represented 73% of U.S. schools of medicine and public health, and 75% of those invited to participate.InterventionStructured, 15-30 minute telephone interviews.Main outcomes and measuresPrevalence and type of institutional oversight; responses to concerning provisions in consulting agreements; perceptions of institutional oversight.ResultsOne third of institutions (36%) required faculty to submit at least some agreements for institutional review and 36% reviewed contracts upon request, while 35% refused to review contracts. Among institutions with review, there was wide variation the issues covered. The most common topic was intellectual property rights (64%), while only 23% looked at publication rights and 19% for inappropriately broad confidentiality provisions. Six in ten administrators reported they had no power to prevent faculty from signing consulting agreements. Although most respondents identified institutional risks from consulting relationships, many maintained that consulting agreements are “private.”Conclusions and relevanceOversight of faculty consulting agreements at U.S. schools of medicine and public health is inconsistent across institutions and usually not robust. The interests at stake suggest the need for stronger oversight.
- Published
- 2018
14. Barriers and facilitators to adoption and use of fuel pellets and improved cookstoves in urban Rwanda
- Author
-
Ryan Seguin, Valerie L. Flax, and Pamela Jagger
- Subjects
Rural Population ,Culture ,Social Sciences ,lcsh:Medicine ,010501 environmental sciences ,01 natural sciences ,Geographical Locations ,Cognition ,0302 clinical medicine ,Promotion (rank) ,Sociology ,Smoke ,Psychology ,Cooking ,030212 general & internal medicine ,Marketing ,Household Articles ,lcsh:Science ,Materials ,media_common ,Family Characteristics ,Multidisciplinary ,Qualitative interviews ,Social Communication ,3. Good health ,Air Pollution, Indoor ,Physical Sciences ,Engineering and Technology ,Research Article ,media_common.quotation_subject ,Materials Science ,Decision Making ,Fuels ,03 medical and health sciences ,Humans ,Peer influence ,0105 earth and related environmental sciences ,lcsh:R ,Rwanda ,Cognitive Psychology ,Sustainability science ,Biology and Life Sciences ,Private sector ,Communications ,Energy and Power ,Contract Law ,Facilitator ,Stove ,People and Places ,Africa ,Sustainability ,Cognitive Science ,Law and Legal Sciences ,lcsh:Q ,Business ,Neuroscience - Abstract
Background The environmental and health impacts of reliance on solid fuels and traditional cookstoves in low-income countries have motivated the promotion of household cooking energy systems that use cleaner burning fuels and cookstoves that lead to reduced exposure to harmful pollutants. Little is known about adoption and use of such systems from the users’ perspective. Methods We explored the facilitators and barriers to adoption and use of a private sector marketed household cooking energy system that uses sustainably produced biomass pellets and the cleanest burning fan micro-gasification stove currently available. We conducted 48 in-depth qualitative interviews in Gisenyi, Rwanda with decision-makers and cooks in 16 households that adopted the improved cookstove system and 8 non-adopter households. Results Reported facilitators and barriers to adoption and non-adoption, as well as use and non-use were complex, and in some cases, contradictory. Some adopters noted that cleanliness and low smoke production were major facilitators to adoption and use, while other adopters and non-adopters said the cookstoves blackened and damaged cooking pots and produced excessive smoke. Our findings suggest that correct use of the stove mediates user experience. Cost was likewise reported as a facilitator among some adopters and a barrier among other adopters and non-adopters. Peer influence played a significant role as both a barrier and a facilitator to adoption and transcended other factors. Positive peer influence describing the cleanliness, affordability, and efficiency of the cookstove system encouraged adoption and use, while negative comments by peers regarding excessive smoke and damaged cooking pots discouraged adoption. Commentaries by some participants suggest that inadequate training and instruction may be primary causes of the discrepancies. Conclusion Cost, cleanliness, communication among peer networks, and adequate training and instruction are important factors associated with the adoption and use of improved cookstoves and should be prioritized in the implementation of improved cookstove programs.
- Published
- 2018
15. Design, monitoring and evaluation of a direct payments approach for an ecotourism strategy to reduce illegal hunting and trade of wildlife in Lao PDR
- Author
-
Troy Hansel, Sivilay Duangdala, Paul Frederick Eshoo, and Arlyne Johnson
- Subjects
0106 biological sciences ,Economics ,Natural resource economics ,Cost-Benefit Analysis ,Social Sciences ,lcsh:Medicine ,Transportation ,Wildlife ,01 natural sciences ,Ecosystem services ,Law Enforcement ,Payment ,lcsh:Science ,Conservation Science ,Travel ,Multidisciplinary ,Animal Behavior ,Ecology ,Commerce ,Eukaryota ,Biodiversity ,010601 ecology ,Models, Economic ,Incentive ,Laos ,Ecotourism ,Engineering and Technology ,Research Article ,Conservation of Natural Resources ,Direct Payments ,Animal Types ,Animals, Wild ,010603 evolutionary biology ,Animals ,Hunting Behavior ,Humans ,Revenue ,Ecosystem ,Behavior ,Ecology and Environmental Sciences ,Endangered Species ,lcsh:R ,Organisms ,Biology and Life Sciences ,Monitoring and evaluation ,Boats ,Contract Law ,Law and Legal Sciences ,lcsh:Q ,Business ,Protected area ,Zoology ,Criminal Justice System - Abstract
Ecotourism as a strategy for achieving biodiversity conservation often results in limited conservation impact relative to its investment and revenue return. In cases where an ecotourism strategy has been used, projects are frequently criticized for not providing sufficient evidence on how the strategy has reduced threats or improved the status of the biodiversity it purports to protect. In Lao PDR, revenue from ecotourism has not been directly linked to or dependent on improvements in biodiversity and there is no evidence that ecotourism enterprises have contributed to conservation. In other developing countries, direct payments through explicit contracts in return for ecosystem services have been proposed as a more cost-effective means for achieving conservation, although further research is needed to evaluate the impact of this approach. To address this need, a new model was tested in the Nam Et-Phou Louey National Protected Area (NPA) in Lao PDR using a direct payments approach to create ecotourism incentives for villagers to increase wildlife populations. Over a four-year period, we monitored along a theory of change to evaluate assumptions about the linkages between intermediate results and biological outcomes. Preliminary results show a negative correlation between ecotourism benefits and hunting infractions in target villages; no increase in hunting sign in the ecotourism sector of the NPA relative to a three-fold increase in hunting sign across the NPA's non-tourism sectors; and an overall increase in wildlife sightings. This case provides key lessons on the design of a direct payments approach for an ecotourism strategy, including how to combine threat monitoring and data on wildlife sightings to evaluate strategy effectiveness, on setting rates for wildlife sightings and village fees, and the utility of the approach for protecting very rare species.
- Published
- 2018
16. Reasons for encounter and health problems managed by general practitioners in the rural areas of Beijing, China: A cross-sectional study
- Author
-
Xiaoqin Lu, Yanli Liu, Juan Du, Lifen Chen, Yali Zhao, Chao Chen, and Guanghui Jin
- Subjects
Male ,Rural Population ,Cross-sectional study ,Physiology ,Psychological intervention ,lcsh:Medicine ,Social Sciences ,Blood Pressure ,Pathology and Laboratory Medicine ,Vascular Medicine ,0302 clinical medicine ,Endocrinology ,Beijing ,Medicine and Health Sciences ,Coughing ,Medicine ,030212 general & internal medicine ,lcsh:Science ,Geographic Areas ,Multidisciplinary ,Geography ,030503 health policy & services ,Middle Aged ,Multistage sampling ,Community health ,Hypertension ,Engineering and Technology ,Female ,0305 other medical science ,Management Engineering ,Research Article ,Adult ,medicine.medical_specialty ,Endocrine Disorders ,03 medical and health sciences ,Insurance ,Signs and Symptoms ,General Practitioners ,Diagnostic Medicine ,Diabetes Mellitus ,Humans ,Primary Care ,Risk Management ,Descriptive statistics ,business.industry ,lcsh:R ,Health Services Administration and Management ,Biology and Life Sciences ,Rural Areas ,Health Care ,Cross-Sectional Studies ,Contract Law ,Family medicine ,Metabolic Disorders ,Earth Sciences ,International Classification of Primary Care ,lcsh:Q ,Law and Legal Sciences ,Rural Health Services ,Rural area ,business ,Physiological Processes - Abstract
Objective The purpose of this study was to describe the patients’ reasons for encounter (RFE) and health problems managed by general practitioners (GPs) in the rural areas of Beijing to provide evidences for health services planning and GPs training. Methods This study was conducted at 14 community health service centers (CHSCs) in 6 suburban districts of Beijing, using a multistage sampling method. A total of 100 GPs was selected from the study sites. A self-designed data collection form was developed on the basis of Subjective-Objective-Assessment-Plan (SOAP), including patient characteristics, RFEs, health problems, interventions, and consultation length. Each GP recorded and coded their 100 consecutive patients’ RFEs and health problems with the International Classification of Primary Care, 2nd version (ICPC-2). Descriptive statistics were employed to describe the distribution of RFE and health problems. Student t-test and analysis of variance were used to compare the differences of mean number of RFE or health problems per encounter by patient characteristics. Results A total of 10,000 patient encounters with 13,705 RFEs and 15,460 health problems were recorded. The RFEs and health problems were mainly distributed in respiratory, circulatory, musculoskeletal, endocrine, metabolic and nutritional, and digestive systems. Cough and hypertension were the most common RFE and health problem, respectively. With increased ages, the mean number of RFEs decreased and the mean number of health problems increased. Patients with Beijing medical insurance had less RFEs and more health problems than those in other cities (p
- Published
- 2017
17. Unbounded and revocable hierarchical identity-based encryption with adaptive security, decryption key exposure resistant, and short public parameters
- Author
-
Xiaofeng Wang, Qianqian Xing, Baosheng Wang, and Jing Tao
- Subjects
Computer science ,Entropy ,Distributed computing ,Normal Distribution ,lcsh:Medicine ,Encryption ,Social Sciences ,Information Storage and Retrieval ,02 engineering and technology ,01 natural sciences ,Signaling Molecules ,Cell Signaling ,0202 electrical engineering, electronic engineering, information engineering ,Guanine Nucleotide Exchange Factors ,Cryptosystem ,lcsh:Science ,media_common ,Multidisciplinary ,Revocation ,Delegation ,Applied Mathematics ,Simulation and Modeling ,Physics ,Privacy ,010201 computation theory & mathematics ,Physical Sciences ,Identity (object-oriented programming) ,Thermodynamics ,020201 artificial intelligence & image processing ,Games ,Algorithms ,Research Article ,Signal Transduction ,Computer and Information Sciences ,media_common.quotation_subject ,0102 computer and information sciences ,Research and Analysis Methods ,Computer Security ,Behavior ,Computers ,business.industry ,lcsh:R ,Biology and Life Sciences ,Cell Biology ,Models, Theoretical ,Probability Theory ,Probability Distribution ,Contract Law ,Cryptography ,Key (cryptography) ,Recreation ,lcsh:Q ,Law and Legal Sciences ,business ,Mathematics ,Software - Abstract
Revocation functionality and hierarchy key delegation are two necessary and crucial requirements to identity-based cryptosystems. Revocable hierarchical identity-based encryption (RHIBE) has attracted a lot of attention in recent years, many RHIBE schemes have been proposed but shown to be either insecure or bounded where they have to fix the maximum hierarchical depth of RHIBE at setup. In this paper, we propose a new unbounded RHIBE scheme with decryption key exposure resilience and with short public system parameters, and prove our RHIBE scheme to be adaptively secure. Our system model is scalable inherently to accommodate more levels of user adaptively with no adding workload or restarting the system. By carefully designing the hybrid games, we overcome the subtle obstacle in applying the dual system encryption methodology for the unbounded and revocable HIBE. To the best of our knowledge, this is the first construction of adaptively secure unbounded RHIBE scheme.
- Published
- 2018
- Full Text
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