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— Background: To establish the trimester-specific reference intervals of thyrotropin (TSH), free thyroxine (FT4) and free triiodothyronine (FT3) in healthy pregnant women in Macau. Methods: Serum samples were collected from 166 healthy pregnant Macau women since early pregnancy until the third trimester. The study was performed in Macau Kiang Wu Hospital from July 2020 to October 2021.Basic clinical and obstetrics data were gathered using questionnaires. Blood samples were sequentially collected from the pregnant women at the first (≤12weeks), the second (12-28 weeks) and the third (>28 weeks) trimesters, respectively. Result: Reference intervals of TSH were 0.02~3.30mIU/L, 0.45~3.80mIU/L and 0.18~3.43mIU/L in three trimesters. For FT4, Reference intervals were 12.82~22.0pmol/L, 9.86~15.58pmol/L and 10.10~15.30pmol/L in three trimesters. For FT3, Reference intervals were 3.53~6.0pmol/L, 2.74~4.65pmol/L and 2.62~4.45pmol/L in three trimesters. The concentration of TSH was significant lower in the first trimester compared to the second and third trimesters of pregnancy (median o.89, 1.66, 1.41mIU/L); TSH concentration differences between trimesters are significantly different (p0.05). Conclusion: This study is the first to establish trimester-specific reference intervals of TSH, FT4 and FT3 in healthy pregnant Macau women. Trimester-specific reference intervals may help in diagnosis and management of thyroid dysfunction during pregnancy which will prevent both maternal and fetal outcomes.

When a seismic event causes unwanted motion in buildings, energy dissipation techniques in civil engineering are required. There are a variety of structures with passive energy dissipation provided by Passive Constant friction damper systems (CFRD). This technique is being used more and more to increase seismic protection for both existing and new constructions. The CFRD system results are explored in order to compare the structural response with and without this device of energy dissipation compared for low and high rise mass varied buildings, the damper put at different storey and altering the slip force has been focused in this study which gives an insight into the variation of slip load and its locations. The CFRD's potential to boost the structure's dissipative capacities without increasing stiffness was discovered. In the case of high-rise buildings, CFRD performance has been examined using top-storey displacements, allowing for a conclusion.

— To date, there is no easy-to-use method and device for its implementation for the detection of codivirus-infectious people by exhalation. The main method of covid infection is airborne when droplets of the infected saliva person enter the oral cavity ofhealthy person. Such method would make it possible to detect infected people and prevent them from entering in public places and send them to quarantine immediately. The method is not traumatic, unlike the PCR test, and along with other methods, it would allow adjusting the patients covid treatment in the hospital. Currently, gas analyzers are accurate research methods with a division value of 1 ppm. The purpose of this work is to identify which gases during the exhalation of infected or sick person are decisive, how to measure them during exhalation, how these gases are associated with entry proteins and enzymes of saliva? How change a gas concentrations depending from the infection and illness time, and what are their values?.

— The development of the manufacturing process to fabricate miniaturized components goes through aspects such as modifications of machines and tools, process optimizations, improvements in precision and accuracy, and fabrication of adapted geometries. Hot-embossing, laser abrasion, and microinjection molding are applicable methods of fabrication to a diversity of geometries and polymeric materials. Rapid prototyping and fabrication assist in the development of new products in a short amount of time with a reduction in costs, allowing the manufacturing of objects with tenths of millimeters and with an accuracy in the order of micrometers. 3D Printing process with photocurable resin is a recent method of rapid prototyping that is growing in the market. Intending to analyze how precise and accurate is the process of 3D printing of miniaturized models and analyze their dimensional tolerance, it was conducted a dimensional analysis of parts fabricated in a printer EDEN 250 by Objet. Qualitative results showed that EDEN 250 prints satisfactory small parts mainly with round formats. Parts with sharp edges show limitations regarding precision and accuracy. FullCure ® 720 is a resin with average quality since it absorbed moisture and is heat sensitive. Studied samples were classified according to the technical standard NBR 6158 as IT11 parts (max tolerance of ± 60 μm).

— The chloro compound, Ethene, Amine, Carbonyl compound, cyanide and methylene compounds were assigned 889.9796 cm-1, 1401.735 cm-1, 1627.371 cm-1, 2208.360 cm-1, 2445.666 cm-1 and 2600.767 cm-1 respectively. Methylene has a weak band, making it less prominent in Bull’s bloodmeal. The fresh blood and dried blood of a red Bororo male cattle was subjected to infra-red spectroscopy at Spring board laboratory, Awka, Anambra State, Nigeria. The interactive effects due to the functional groups during drying were responsible for the changes observed in the spectra. It can be deduced that the dried sample has a more stable and sharper bands than those of the fresh sample. The infra-red spectrum of the bloodmeal consists of several peaks. At the region of N-H stretches, the peak looks like a cow udder, confirming the presence of primary amine.

— Epoxy resin reinforced with carbon fibers are widely used in applications where requirements of lightness and high mechanical strength are needed. Composites containing fillers with different properties can improve important characteristics of components. In aerospace applications, the use of low removal rate due to the impact of suspense particles must be satisfied in order to reduce maintenance costs of components. Since carbon fibers have low electrical resistivity and are in the range of semiconductors, these composites can be used as radar absorbing materials (RAM). The addition of conductive fillers may increase this intrinsic property of the composite, and also improve the mechanical and wear properties of the laminate. Results showed that the addition of micronized graphite (MG), multi-walled carbon nanotubes (MWCNTs) and short steel fibers (SSF) reduce the weight loss on abrasion test, but reduce values of flexural module (except for the addition of 5% of MG). In terms of electrical properties, fillers showed tendency to increase the electrical conductivity mainly for reduce fraction of fillers added, showing that higher contents can produce a non-homogeneous structure since that the mechanical and wear properties were affect in the same order.

— A quadcopter is a form of unmanned aerial vehicle with several rotors. Surveillance, military operations, fire detection, agriculture, spyware, and a variety of other applications are all new to it. Because of their dependability, cost effectiveness, and multi-functionality, they are frequently used in many locations. This article details the design process, including component selection and manufacturing of X-shape quadcopter.

— It has been established that plants which naturally synthesize and accumulate some secondary metabolites such as alkaloids, glycosides, tannins, volatile oil, minerals and vitamins have medicinal properties. Then phytochemical and amino acid profile of allium cepa extracts was carried out. The proximate values of the nutrients in 100g of raw onion were analyzed using qualitative and quantitative method. Amino acid profile of the onion extracts was done by extraction, digestion, distillation, hydrolysis, titration, and evaporation techniques and finally analysed using Technicon Seqential Multisample analyser (DNA model). The standard quantitative method of analysis was used to determine the phytochemicals (toxicants) in the onion extracts while qualitative method was used for the screening.. The result of proximate compositions proved that onions contain Water (86.5%), carbohydrate (11.1%), Protein (1.3%), Fats and oil (0.2%) and Ash (0.5%). The Amino acid profile revealed that Arginine (3.74g/100g) and Histidine (1.21g/100g) were present in the extracts. Others include; Isoleucine (2.22g/100g), Leucine (4.11g/100g), Lysine (3.60g/100g) Methionine (0.86g/100g), Phenylalanine (2.29g/100g), Threonine (1.25g/100g) and valine (2.01g/100g), in 100g of protein. There was a change in the values of amino acid profiles of the aqueous extract when compared with that of solvent extracts. The results of the phytochemical screening showed that; flavonoid, terpernoids, carbohydrate, cardiac glycosides, saponins, anthraquinone, phlobatannins, alkaloid and polyphenol were present. The amounts of toxicants in 100g raw onion were: Alkaloid (13.0%), Tannic acid (0.03g), Oxalate (1.15g), Cyanogenic glycosides (2.91mg) and phytic acid (6.05mg). likewise the solvent extracts. But at alpha – level (p ≥ 0.05), there was no significant difference (p = 0.222) between the effects of aqueous and solvent extracts. The research has shown that; onions widely used as food, could serve as natural medicine, flavour enhancer and antimicrobial agent in food and pharmaceutical industries to improve Nigeria’s ailing economy.

— Managing Environmental Risk for onshore Oil and Gas exploration and production is a challenging task because many drilling and other techniques are complex in this industry. In this it is described the implementation and the use of environmental risk management and mitigation strategies for onshore oil and gas projects. To eliminate any risk of contamination the potential impact of the operations and identification of mitigation procedures are followed. It provides a framework for the future environmental management of the area in order to minimize the negative impacts of operations. The extraction and transportation of both Oil and Natural Gas has a scope of important risks for both workers from these activities by accidents at work and people from neighboring villages (major accident) and for the environment. This paper describes the theoretical considerations regarding the implementation of concept of environmental risk in their activities in Oil and Gas industry and also emphasized on the aspects of managing environmental risk in Oil and Gas industry. Questionnaire survey was conducted for the senior level executives of all installations visited of ONGC, Western – Region and analysis was done in order to identify the environmental risk taking place in Oil and Gas industry and what are the safety measures taken into consideration for managing it.

— This work present Metal matrix composites (MMCs) constitute process which improved properties including high specific strength; specific modulus, damping capacity and good wear resistance compared to unreinforced alloys. When analyses were carried out, two reinforcements namely silicon carbide (SiC) and aluminium oxide (Al2O3) were used for production of hybrid metal matrix composites. The two reinforcements were ball milled in order produce as single entity of these reinforcements. The reinforcement was varied from 0%, 2%, 4%, and 6% to produce hybrid metal matrix composites. All the composites were produced by stir casting. The mechanical properties of the metal matrix composites were investigated. The microstructure and X ray diffraction study was carried out. Similarly, Vickers hardness test, Tensile strength test, Toughness test were also used to investigate the metal matrix composites. After analyses it was found that the Al2O3 and SiC particles were uniformly distributed throughout the metal matrix. The tensile strength and hardness of Al2O3 and SiC reinforcement aluminium composites improved with the increase in volume fraction of nanoparticles and toughness decreases with the increasing volume fraction of reinforcement.

— This paper focuses on the prospects of recycled broken sand Crete hollow blocks as fine aggregate for masonry works. Sandcrete hollow blockswere taken from dealers in Zaria and tested fordensity, water absorption, dimension tolerances, drying shrinkage, wetting expansion and compressive strength as compared to hand moulded blocks which were moulded in the laboratory to NIS 87(2004) specification. Density ranges from 1797.37Kg/m3 – 1974.00Kg/m3, water absorption ranges from 5.38% - 10.38%, drying shrinkage ranges from 0.028% - 0.044%, wetting expansion ranges from 0.042% - 0.059% and the 28th day compressive strength ranges from 0.45N/mm2 - 0.85N/mm2. Results showed that density, water absorption, drying shrinkage, wetting expansion and 28th-day compressive strength of block samples manufactured from quarry fine collected from one of the industries was 2070.11Kg/m3, 9.54%, 0.034%, 0.05%, and 1.38N/mm2 respectively. The study confirmed that the quality of sand Crete blocks manufactured in Zaria does not meet the specified standard in respect of strength.

— The correlation between lithospheric earthquakes on the American continent and tropical cyclones that arose after the French nuclear tests is considered. The transfer of the local impact of TC on the lithospheric plates of the other hemisphere is proposed to be assessed by the effect of "Fantom" TC symmetric with respect to the center of the Earth. It is shown that the localization of earthquakes shifts in accordance with the movement of the "Fantom" TC and its intensity. This indicates that TCs are a trigger for earthquakes in the most intense seismic areas.

— Adaptation of new technologies like intensive system of fish culture, processing of fish using modified drum ovum as well as other new technologies were studied in the South East Nigeria. Data collection for this study came from primary and secondary data. The primary data was generated through field survey using well-structured questionnaires as a major research instrument. The secondary data on the other hand were obtained through relevant literature ranging from textbooks, journals, articles, periodicals, seminar papers and proceedings. The result evinced that fish farmers in the entire south east used mainly intensive system of farming and less of extensive system of farming. Modified drum ovum is the most popular processing method preferred by all the fish farmers in the entire five south east states of Nigeria while choker kiln is the least. This can be attributed to its availability and affordability. The study recommends government support towards fish farming activities in the entire five South Eastern States of Nigeria. The farmers are encouraged to form cooperative societies or groups to gain easy access to credit facilities, they should also as a matter of urgency reorganize their various state Agricultural Development Programmes and recruit young fishery graduate that can be deployed in their state local government areas as well as providing financial assistance to these fish farmers through loans, subsidies in the form of feed, fish fingerlings, processing units etc. and organized special trainings in on-farm feed formulation, hatchery, fish processing, marketing, fish pond management and maintenance.

— Furrow irrigation is considered to be inefficient when compared to most pressurized irrigation systems. The objective of this research was to determine if different furrow shapes have different impacts on water management practices such as application efficiency, deep percolation ratio and tail water runoff. Three furrow shapes, a triangular (V-shaped), rectangular (R) and trapezoidal (Tp) shaped were evaluated and the results were compared with output from SIRMOD II. The parameters calculated from field data were not very different from those determined by the model. This indicated that the model predicted the volume balance of the field data with reasonable accuracy. It was observed that the time of advance was shorter for the triangular shaped furrow and much longer for the rectangular shaped furrow. Performance efficiency parameters were good for the trapezoidal and triangular shaped furrows and very poor for the rectangular furrow. Tail water ratio (TWR) was much higher in the triangular furrow and lower in the rectangular furrow. Where there was no deep percolation ratio, the model failed to return a reasonable value.

— In this paper, we first introduce and define “Digital Divide 2.0”, and show that, unlike the “traditional” Digital Divide, this is about the survival of countries and their ability to cope with a global environment that is more and more instable and uncertain! We build an argumenta supporting our assumption and, from there, we present the foundations of a computational framework to guide and streamline the Digital Transformation Process.

— A study about the use of medications (indication-prescription) was realized, prospective in patients with buccal illness, using a tincture at 10 % from Calendula officinalis as therapeutic option, in four different clinics in Havana City, Cuba. 110 patients were chosen randomly, and were collected data from 60 physicians. Results were measured as treatment-response, time of improvement and used dosis with time of improvement. The sample answered to the treatment at 90 %, and from them, 73.7 % in a period between 3-6 days, and 26.3 % in a period of 7-10 days. Calendula officinalis tincture at 10 % was effective in treatment of buccal infections corroborating its antibacterial and anti-inflammatories properties due to the presence of volatile oils, and flavonoids, among others.

��� A study about the use of medications (indication-prescription) was realized, prospective in patients with buccal illness, using a tincture at 10 % from Calendula officinalis as therapeutic option, in four different clinics in Havana City, Cuba. 110 patients were chosen randomly, and were collected data from 60 physicians. Results were measured as treatment-response, time of improvement and used dosis with time of improvement. The sample answered to the treatment at 90 %, and from them, 73.7 % in a period between 3-6 days, and 26.3 % in a period of 7-10 days. Calendula officinalis tincture at 10 % was effective in treatment of buccal infections corroborating its antibacterial and anti-inflammatories properties due to the presence of volatile oils, and flavonoids, among others.

— The article addresses the design and calculation of heat transfer in the program ANSYS CFX of passive cooling module for metal hydride low-pressure vessels, which main purpose is to store hydrogen used in mobile applications such as automobile or bus.

��� This article discusses the possibility of natural gas odourisation, which is performed due to the fact that natural gas has no smell of its own. In order to facilitate the detection of potential gas leaks from distribution networks by the human sense of smell, the gas must be combined with an odourant. A concentration of such an odourant should be constant throughout the entire distribution network in order to facilitate the earliest possible detection of potential gas leaks. This article also deals with the issues related to the odourisation of natural gas in a high-pressure pipeline in a gas distribution network. It presents a theoretical overview of the used types of odourants, odourant control methods, and a model of odourant behaviour in a distribution network in various conditions, which was created using numerical simulations performed in ANSYS software.

— A preliminary chemical characterization of main components of toluene extract with dried rhizomes of Smilax domingensis Willd. that grow in Cuba was done using a GCMS-QP2010 Ultra Shimadzu and the mass spectra of the compounds found in the extract was matched with the National Institute of Standards and Technology (NIST) libraries. After sample derivatization 893 chemical compounds were registered by the equipment and from them, 30 different chemical components were characterized and reported for the first time from this part of the plant in our country. The results demonstrate that the developed method could be employed as a rapid and versatile analytical technique for identification of chemical constituents and quality control of Smilax domingensis.

— The coronavirus pandemic significantly affects the lives of families, employees, employers, or sole proprietors, and it is therefore necessary to prevent its spread by using appropriate protective equipment. The article discusses the possibilities of protection against various forms of harmful particles, including the highly infectious virus SARS-CoV-2 using face protection respectively respiratory protection.

— The number of countries where the infection by a new coronavirus has been identified is constantly increasing. Accordingly, the amounts of infected people in the individual countries are alarming. The purpose of the present article is to provide information on this new, highly infectious disease and describe potential methods for reducing the risk of the infection transmission in our environment.

— This article describes the issue of hydrogen storage in metal hydrides and addresses the design of aheat exchanger and the calculation of heat transfer in low-pressure steel vessel with heat exchanger, which isused for hydrogen storage using La Ce Ni based metal alloys.

��� A preliminary chemical characterization of main components of toluene extract with dried rhizomes of Smilax domingensis Willd. that grow in Cuba was done using a GCMS-QP2010 Ultra Shimadzu and the mass spectra of the compounds found in the extract was matched with the National Institute of Standards and Technology (NIST) libraries. After sample derivatization 893 chemical compounds were registered by the equipment and from them, 30 different chemical components were characterized and reported for the first time from this part of the plant in our country. The results demonstrate that the developed method could be employed as a rapid and versatile analytical technique for identification of chemical constituents and quality control of Smilax domingensis.

— This article discusses the possibility of natural gas odourisation, which is performed due to the fact that natural gas has no smell of its own. In order to facilitate the detection of potential gas leaks from distribution networks by the human sense of smell, the gas must be combined with an odourant. A concentration of such an odourant should be constant throughout the entire distribution network in order to facilitate the earliest possible detection of potential gas leaks. This article also deals with the issues related to the odourisation of natural gas in a high-pressure pipeline in a gas distribution network. It presents a theoretical overview of the used types of odourants, odourant control methods, and a model of odourant behaviour in a distribution network in various conditions, which was created using numerical simulations performed in ANSYS software.

— The present study concerns with the experimental and numerical investigation of crack stoppers ahead of an edge crack in panels subjected to tensile loading. Two different patches (rectangular and semi-annular patches) have been analyzed. The patches (aluminium and steel) are placed at different distance from the crack, symmetrically on both sides of the panel and at a finite distance ahead of the crack tip. A finite distance ahead of the crack tip reveals that depending on the distance, the crack tip could remain straight or curve. In such cases, the crack could either be arrested, run through or run around the reinforcements. Moreover, the degree of instability is reflected by an index parameter that accounts for the effect of load, geometry and material properties. Moreover, a geometrically nonlinear, two-dimensional (2D) finite element analysis (Comsol Multiphysics) has been employed to determine the local energy intensity. It would be of special interest to know whether the crack would run straight and arrest at the patch regardless of the other variables. The ultimate goal for straight crack path is to produce sufficient low local energy intensity. This gives a significant advantage because as the local energy intensity is increased, crack would tend to curve and lead to complete fracture of the patched specimens. It is equivalent of moving the patch closer to the crack tip. The predictions made from the strain energy density theory, as well as, there is a good agreement between finite element results and experimental findings.

— The effects of micro and nanoscale calcium carbonate (CaCO3) particles on the mechanical properties of polyvinyl chloride (PVC) were investigated. Type of (PVC S5070) were used as the matrix in this study, hydrocarb 95T CaCO3 as a micro size particles, and SOCAL 312 CaCO3 as a nano size particles with different phr (0 wt%, 10 wt% and 20 wt%). The nano-CaCO3 particles were observed by FT-IR spectras. Nano- CaCO3 increased the tensile strength and affected the tensile strength of PVC more than micro-CaCO3 particles. The raise in hardness shore (A) is more considerable in nano-CaCO3 filled PVC compared to that of micro-CaCO3. TSDC test investigated that nano-CaCO3 in PVC samples have greater electrical resistance, andthe maximum volume resistivity in micro-CaCO3 in PVC samples which mixed by ultrasonic. Thermal characterization of PVC samples were tested by DMA. Storage modulus and loss factor (tan δ) examined and showed that the storage modulus of PVC decreased as a function of temperature. The storage modulus can be increased concurrently by the presence of CaCO3. The glass transition of nano-CaCO3 sample mixed by ultrasonic has higher glass transition than other samples which mixed by normal mixing.

— A sample of ethanolic extract of the flowers from Spathodea campanulata Beauv. was scrutinized using a UHPLC-DAD-MS/MS Thermo scientific Dionex Ultimate 3000 RS coupled to a Thermo scientific LTQ XL mass spectrometer. In addition, about nine different chemical compounds were tentatively identified in this species based on chromatography retention time (Rt), UV and MS/MS spectra and compared with those of isolated authentic compound and literature data in our country for the first time. Information obtained from these studies can be used as biomarkers in the identification and standardization of this flower as an herbal remedy and also towards monograph development on the plant.

— Effect of processing method of kidney beans (phaseolus vulgaris) on carcass quality, organ weight and organoleptic properties of broiler was studied using one hundred and twenty day-old chicks (Arbo acre strain). Raw, dehulled and boiled KB were used for treatment 2, 3 and 4, respectively. Prior to grinding of KB, 50kg was boiled at 100 0C for 1 hour, 10kg was dehulled by immersing in cool water for 20 hours, and seed coat removed. The work was carried out using completely randomized design, with four treatments and three replicates of 10 birds per replicate. Data collected were analyzed using SPSS version 22. The relative weight of liver, spleen and heart had no significant effect (p>0.05) within the dietary treatment. The weight of the liver was smaller in birds fed raw kidney beans meal and the liver was characterized by marked coagulative necrosis. The weight of the gizzard was significantly (p0.05) in birds fed boiled, dehulled and control diets on the breast weight but significantly smaller in those fed raw diet meal. There were also no significant differences on the drumstick, thigh, neck and head size. Tenderness was not significantly affected by the dietary treatments. Juiciness, taste, and flavour intensity showed significant differences within the dietary treatment while overall acceptability showed a significant increase with the boiled kidney bean meal. Consequently, birds fed with BKD performed better in the organoleptic properties, while those on dehulled kidney beans meal gave better result for organ weight and carcass yield. In conclusion, sensory characteristics, organ weight, and carcass yield is an indication that kidney beans especially the boiled and dehulled one can serve as a feed ingredient in broiler ration would have no adverse effect.

— We focused on the study of using math modeling and machine learning to do big data analysis, therefore to detect Credit card fraud, which is one of the serious issues in real life. In order to detect credit card fraud, after reviewed many recent research, we chose the most popular models among credit card fraud detection, which are Random Forest (RF), and ANN with multi-layers (DNN). We evaluated the accuracy and recall of these models in detecting credit card fraud with or without SMOTE, and found out that there is no significant improvement in the accuracy of these models with or without SMOTE training, but RF with SOMTE has a little bit vantage than others. There is a significant improvement in recall of these three models with SMOTE training. Especially, with SMOTE training, ANN or DNN is of better performance in the recall than RF. Therefore, we combine RF and DNN to generate a hybrid model so that it produces better stability in accuracy and recall. The study discovered that neural network models have greater potential for finding abnormal data in the big data stream. This has important guiding significance for what mathematical model that credit card companies use to monitor the cash flow and remind customers of the possible risk of credit card fraud.

— Samples from petroleum contaminated soil of Eleme, Port Harcourt and from non petroleum contaminated soil, Awka, Nigeria serving as control were analyzed for heavy metals. The results of the analysis showed that the metals concentrations in mg/kg were Ni

— Autonomous vehicles are increasingly becoming ubiquitous in the 21st century; they find application in agriculture, industry, airplanes, cars, service robotics, and others; in order to display autonomous guidance, a vehicle needs to estimate its position and orientation relative to an arbitrary coordinate system; to do so, several sources of information can be used, including images, global positioning systems, inertial measurements or odometry, each according to the application; methods, such as Kalman Filter can be used to combine the several sources of information; however, the more accurate each source of information is, the better the estimation of vehicle position and orientation will be; therefore, the calibration of the parameters of the odometrical systems in autonomous terrestrial vehicles is a must; visual guidance is also an important technology used for vehicle guidance. In this paper, it is presented an off-line method for odometry calibration using a genetic algorithm and the fusion of odometry data with heading information from camera data; a particle filter is used to fuse the data from the optical encoder and the camera. This method was tested in an Automated Guided Vehicle (AGV) with tricycle topology, demonstrating high accuracy in position estimation and guidance through arbitrary paths.

— The generation and growing power of computer science have boosted data collection, storage, and manipulation as data sets are broad in size and complexity level. Internet of Things (IOT) is the most popular term in describing this new interconnected world. The massive data generated by the Internet of Things (IoT) are considered of high business value, and data mining algorithms can be applied to IoT to extract hidden information from data. As more and more devices connected to IoT, the latest algorithms should be applied to IOT. This paper explores a systematic review of various data mining models as well as its applications in the Internet of things along with its advantages and disadvantages.

— The following article presents the implementation of a low cost property security system through the use of the Arduino Uno board, which has a reasonable processing capacity and the ability to manipulate devices that perform functions of robotics and embedded instrumentation. The programming was carried out through the Servo.h library, which follows the Arduino integrated development environment (IDE) and functions designed to read analog and digital signals. The current prototype is formed by a webcam attached to a Pan-Tilt support, composed by two servomotors and being controlled through a 2-axis potentiometer joystick that allows the vertical and horizontal movement of the prototype. The captured images were recorded using software made available by the camera manufacturer. Consequently, the laptop used in the project played the role of a digital network video recorder (NVR) while discarding the need to use a video monitor. In this way, an electronic monitoring system was obtained, capable of functioning as an effective protection instrument.

— Person re-identification could be essential operation for any multi-camera observation situation. Until presently, it has been performed by misusing fundamentally appearance prompts, hypothesizing that the people cannot alter their clothes. In this paper, we unwind this limitation by displaying a set of 3D soft-biometric signals, being uncaring to appearance varieties that are assembled utilizing RGB-D innovation. The point utilizes of these characteristics gives empowering exhibitions on a benchmark of 79 individuals that have been captured in different days and with different clothing. This advances a novel investigate heading for the re-identification community, backed moreover by the reality that an unused of affordable of RGB-D cameras have as of late attacked the around the world advertise.

— One and two-step methods for the synthesis of saccharin-6-carboxylic acid triglyceride were studied. The reesterification reactions of 2-hydroxypropyl-1,3-bis-ethersulfoimide of this acid and glycerol with some aliphatic saccharin-6-carboxylic acid esters were carried out. The resulting products are characterized by elemental analysis and IR spectroscopy and size exclusion chromatography. It was found that when using a two-step method, the end product is obtained with the highest yield (85%). The influence of additions of nanofillers (NF) containing nanoparticles of the copper oxide, stabilized by polymer matrix of maleinized polyethylene of high pressure (MPE), obtained by mechano-chemical method on peculiarities of structure and properties of metal-containing nanocomposites on the basis of isotactic polypropylene (PP) and butadiene-nitrile rubber (BNR) by methods of X-ray phase (RPhA) and differential-thermal analyses (DTA) and scanning electron microscopy (SEM) has been investigated. It has been revealed an improvement of the strength, deformation and rheological indices and also the thermal-oxidative stability of the obtained nanocomposites, which has been apparently connected with the synergetic effect of the interaction of the zinc-containing nanoparticles with maleic groups of MPE. It has been shown that the nanocomposites on the basis of PP/BNR/HF can be processed both by pressing method and by methods of casting under pressure and extrusion, which expands the sphere of its application.

— Energy loss reduction is a significant issue for Renewable energy planning in the Distribution system. The high penetration of wind and solar became the primary task for the optimal size of energy storage to support the power mismatch. In the present work, energy savings have been obtained in a renewable integrated distribution system. The impact of the energy storage device has also been evaluated. The main contribution of this paper is: Optimal location of DGs and battery are obtained by solving single and multi-objective functions. Determination of DG and battery size for loss savings. Impact of battery energy storage device on loss profile and total cost of the system. The simulation results of the test system have been compared with other existing results.

— As the world is progressing faster with new technological innovations, the need and demand for energy is also constantly expanding. In the light of conventionally available fossil fuel reserves being exhausted extensively that has left a very deep scar on environment, the urge for alternative environment friendly energy source is the need for energy sustenance. Hydrogen gas is distinct for its high calorific value, clean fuel characteristic and suitability for wide applications. Chemical method likes steam reforming, coal gasification are established technologies available for industrial hydrogen needs but are high in terms of cost and energy input. Biological methods are promising routes for hydrogen gas generation as they can be cost effective and use a variety of organic materials as substrates. The current study is focused on generation of hydrogen gas using Rhodobacter meghalophilus, a mesophilic, and purple non sulfur photo fermentative bacteria. Crude glycerol, byproduct from biodiesel plants is used as carbon substrate because of its rich organic content. Experiments were carried out to study the effect of process parameters viz. volume of crude glycerol, pH and light intensity on generation of hydrogen gas. Crude glycerol in the media was varied from 5 – 15% (v/v), pH between 5.8 – 8.3 and the light intensity at 500, 1000 and 2000 Lx respectively. At 15% (v/v) of crude glycerol, pH of 7.8 and 1000 Lx, the volume of hydrogen gas obtained was 490 ml/L with the substrate to hydrogen gas conversion rate as 0.012 mol/ mol of crude glycerol with light conversion efficiency of 1.16%.

— Extensive works have been done on the subject matter of local sourcing of drilling fluid additives to reduce our importation burdens especially in this era of dwindling oil fortunes. This local sourcing will bolster industrialization and reduce unemployment in a vast economy like Nigeria. The results of the previous studies have shown promising potentials which are in tandem with our local content mandate of the government. Cassava starch has been identified as one of these additives and our ranking as the world largest producer of cassava remains instructive. Currently, all the starch used in the oil and gas industry is imported. The major constraint to the use of cassava starch is their extreme susceptibility to post-harvest degradation. This work, therefore, is an attempt to address this problem of stability by the application of appropriate preservatives without prejudice to the rheological properties of the mud. In carrying out this study at temperatures of 80, 120, 150 and 1900F, three cassava starch cultivars TMS 92/0057, TMS 98/0581 and TMS 96/1632 and four common preservatives in the food industry; the salts of benzoate, propionate, sorbate and metabisulphite were used in the bentonite mud formulations. The result showed that out of the sixty-one mud formulations, only five of them adequately met the API rheological properties threshold. These five muds exhibited properties that compare favourably to the imported starch sample. This stabilized product holds much promise as a substitute to the imported starch for use in water-based drilling mud formulations for the Nigerian oil industry.

— From ethanolic extracts of the flowers of Talipariti elatum (Sw.) eigth different samples were isolated, purified and analyzed by UHPLC-MS/MS to determine the chemical constituents that they content. Each sample was separated and reinjected to get the most possible information about the chemical compounds that they posses. After an exhaustive analysis 8 different chemical components were tentatively identified according to their MS and literature data. Two compounds until remain unknown.

— The present article describes a heat exchanger withtransparent (smooth) fibres with an atypical body shape and an atypical arrangement of polypropylene capillaries inside. The exchanger cross-section was of a square shape. This type of exchanger was subjected to the investigation of the impact of the fibre arrangement on the overall heat transfer coefficient and behaviour of fibres during the experiment. The exchanger was examined in the counter flow arrangement. The exchanger with 1,400 transparent fibres with the outer diameter of 0.275mm was examined at the secondary fluid flow rate of 150l·h-1 to identify the overall heat transfer coefficient k which amounted to 520W·m-2·K-1. When compared to an exchanger with identical parameters of fibres placed inside a cylindrical exchanger body, a decrease in the overall heat transfer coefficient represented 14%. At the flow rate of 200l·h-1, the value of the overall heat transfer coefficient identified experimentally was 632W∙m-2·K-1. When compared to cylindrical exchanger with comparable fibre parameters, the value was 33% lower.

— Due to large resistance and lower reactance of lines, the voltage control and power loss became a crucial issue. The flat voltage profile, is therefore expected to distribution system at each node, minimum power loss, the maximum cost of saving and maximum efficiency. In this context, to find the size and location of compensating devices for the reactive power and voltage control devices became the essential need. In this paper, the multi-objective optimisation problem is solved for the sizing and location of reactive power compensating devices in the distribution system. The main contributions of the proposed work are To address the hybrid algorithm to determine the location and size of Distribution Static Synchronous Compensator (D-STATCOM). The power loss and voltage deviation are minimised. The impact of D-STATCOM with minimum voltage growth is analysed. The results are verified, tabulated and compared with other methods. The IEEE-33 bus test system has been taken for the analysis.

���Naresuan University Engineering Journal, 16, 2, 11-17

— Based on the Hamilton’s principle, invariants are proposed to describe the processes of formation and evolution of the structure of the metal interface under friction. These invariants can be used, among other things, in the creation, evolution and destruction of nanomaterials.

— The aim of this work is to understand the combined effects of stress, temperature, humidity and chloride ion on the susceptibility of stress corrosion cracking (SCC) of type 304 austenitic stainless steel. The occurrence of SCC was investigated using the as received (cold work), sensitized samples those are exposed to the environmental test chamber at 40oC and 70oC, respectively. The humidity from 40% to 70% RH with gradient of 10% was applied during the corrosion test lasted 720h. The results showed the environmental conditions where SCC crack can be occurred and where it can be avoided. The initiation and the propagating of SCC crack on the flat and U-bend specimens were grown up to correspond to the increasing of test temperature. Very high stress corrosion cracking can be observed in the period of low relative humidity (40%) and temperature (40oC).

— This paper explores the use of Cañita by artisans of Nacajuca, Tabasco, Mexico to elaborate commercial crafts. This plant occurs naturally, but its demand by artisans has increased, which could lead to the gradual extinction of wild populations. The aim of this study is to provide introductory information on Cañita (C. canus): botanical description, agricultural production and artisanal use. The conclusion is that despite the economic and agronomic advantages of this plant, the system of artisanal production and the socio cultural environment of the families that work with it do not contribute to the sustainability of the production of Cañita, which is the limiting factor for the production processes related to commercial tourism and the capacity of artisans to make long-term decisions.