Miracle-dz/UniFAR-FTUs huggingface dataset:
Thermal energy storage for low grade heat in the organic Rankine cycle

OF THE THESIS Thermal Energy Storage for Low Grade Heat and the Organic Rankine Cycle by Michael John Soda Master of Science in Mechanical Engineering San Diego State University, 2014 Limits of efficiencies cause immense amounts of thermal energy in the form of waste heat to be vented to the atmosphere. Up to 60% of unrecovered waste heat is classified as low or ultra-low quality, making recovery difficult or inefficient. The organic Rankine cycle can be used to generate mechanical power and electricity from these low temperatures where other thermal cycles are impractical. A variety of organic working fluids are available to optimize the ORC for any target temperature range. San Diego State University has one such experimental ORC using R245fa, and has been experimenting with multiple expanders. One limitation of recovering waste heat is the sporadic or cyclical nature common to its production. This inconsistency makes sizing heat recovery ORC systems difficult for a variety of reasons including off-design-point efficiency loss, increased attrition from varying loads, unreliable outputs, and overall system costs. Thermal energy storage systems can address all of these issues by smoothing the thermal input to a constant and reliable level and providing back-up capacity for times when the thermal input is deactivated. Multiple types of thermal energy storage have been explored including sensible, latent, and thermochemical. Latent heat storage involves storing thermal energy in the reversible phase change of a phase change material, or PCM, and can have several advantages over other modalities including energy storage density, cost, simplicity, reliability, relatively constant temperature output, and temperature customizability. The largest obstacles to using latent heat storage include heat transfer rates, thermal cycling stability, and potentially corrosive PCMs. Targeting 86°C, the operating temperature of SDSU’s experimental ORC, multiple potential materials were explored and tested as potential PCMs including Magnesium Chloride Hexahydrate (MgCl2·6H2O), Magnesium Nitrate Hexahydrate (Mg(NO3)2·6H2O), montan wax, and carnauba wax. The addition of graphite to augment heat transfer rates was also tested. Melting and solidification temperatures largely matched predictions. The magnesium salts were found to be less stable under thermal cycling than the waxes. Graphite was only soluble in the waxes. Mixtures of magnesium salts and waxes yielded a layered composite with the less dense waxes creating a sealing layer over the salt layer that significantly increased the stability of the magnesium salts. Research into optimum heat exchangers and storage vessels for these applications indicates that horizontally oriented aluminum pipes with vertically oriented aluminum fins would be the best method of storing and retrieving energy. Fin spacing can be predicted by an equation based on target temperatures and PCM characteristics.
Applying TVDI based on remote sensing data to evaluate the drought in Cu Chi District

Drought is a constant threat to Vietnam which causes great damage to the economy as well as forest ecosystems. Due to the increasingly complex drought-related impacts, remote sensing technology with outstanding advantages compared to traditional research methods has been applied effectively in research, monitoring, and coping with drought. Normalized Difference Vegetation Index (NDVI) and Land Surface Temperature (LST) were calculated from Landsat imagery. The Temperature Vegetation Dryness Index (TVDI) with the combination of LST and NDVI index, was used as an indicator for drought risk assessment in Cu Chi District in 2005, 2010, 2015, and 2020. The results show a significant increase in dry areas between 20052010 and 2015-2020. On the other hand, the results of the TVDI index and mapping drought of Cu Chi district on February 13, 2005, February 11, 2010, January 24, 2015 and February 23, 2020 are a basis for risk assessment and drought monitoring.
Students' Role Consciousness: Phenomenological Reflection Based on Examination Score

Students are the main body of learning activities and the practitioners and participants of all teaching behaviors. As students' perception of their own bodies, learners' role consciousness is spatial, and the test scores obtained by students participating in learning activities are also spatial. As an objective evaluation hard index, examination score arouses students' role consciousness and urges them to study hard. At the same time, it is an evaluation of students' study in school. Through the function of examination scores, phenomenological analysis is carried out from the conflict of students' role consciousness experience, and the spatial symbols of examination scores are interpreted to reveal the pedagogical significance of examination score.
Avaliações Negativas de Hotéis: Uma Análise de Dois Importantes Destinos Turísticos de Lazer do Brasil / Negative Hotel Ratings: An Analysis of of Two of Brazil's Top Tourist Leisure Destinations

On-line evaluations of hotel reservation sites have become an important information and influence tool for the choice of hosting environment, as well as an excellent tool for managers. The overall objective of this study is to analyze the negative accommodation ratings on the Booking of the two main tourist leisure cities in Brazil, Rio de Janeiro (RJ) and Florianópolis (SC) and thus understand important criteria for the guest when choosing a leisure accommodation. There was a content analysis of 918 ratings, rating the comments "very poor" depending on the variables: guest room, location, service, price, security, food service, guest loyalty program and others. The result was 2,537 units of text, the main result of which were guests concerned about the service and issues surrounding the hotel apartment. Today, social media is becoming an important tool for tourism, both for customer decision and hotel chains to explore strategies that enhance customer satisfaction.
His–Purkinje Conduction System Pacing: State of the Art in 2020

Conduction system pacing involves directly stimulating the specialised His–Purkinje cardiac conduction system with the aim of activating the ventricles physiologically, in contrast to the dyssynchronous activation produced by conventional myocardial pacing. Since the first report of permanent His bundle pacing (HBP) in 2000, the stylet-driven technique of its earliest incarnation has been superseded by a more successful stylet-less approach. Widespread uptake has led to a much greater evidence base. Single-centre observational studies have now been supported by large multicentre, international registries, mechanistic studies and the first randomised controlled trials. New evidence has elucidated mechanisms of HBP and illustrated the nature and magnitude of its potential benefits for preventing pacing-induced cardiomyopathy and correcting bundle branch block. Left bundle branch pacing (LBBP) is a newer technique in which the lead is fixed deep into the left side of the intraventricular septum to allow capture of the left bundle, distal to the His bundle. LBBP holds promise as a method for physiological pacing that overcomes some of the fixation, threshold and sensing challenges of HBP. In this state-of-the-art review of His–Purkinje conduction system pacing, the authors assess recent evidence and current practice and explore emerging and future directions in this rapidly evolving field.
Klasifikasi Topeng Pandawa dengan SVM

Klasifikasi merupakan tahapan tingkat lanjut dari sebuah keilmuan computer vision. Karena tujuan dari sebuah aplikasi rekognisi yaitu mengenali. Cara mengenali yaitu dengan cara klasifikasi. Banyak metode klasifikasi yang ada, namun pada penelitian ini menggunakan Support Vector Machine (SVM). SVM dipilih karena bisa mengatasi data dengan dimensi yang sangat besar tanpa mereduksi data, bekerja dengan data linier atau nonlinier dan membuat sebuah hyperplane yang memisahkan data antar kelas. Pada penelitian ini menggunakan data patung pandawa dengan lima kelas. Lima kelas terdiri dari kelas yudhistira, bima, arjuna, nakula dan sadewa. Kernel yang digunakan pada penelitian ini menggunakan Radial Basis Function (RBF). Hasil ujicoba pada penelitian mempunya rata-rata akurasi sebesar 0,848.
Comparative analysis of best practices in e-Government implementation and use of this experience by developing countries

: A comparative analysis of the practice of implementing e-government in different countries gives an opportunity to identify the advantages and disadvantages of existing information systems, find ways to optimize and improve the efficiency of public administration. The purpose of this study was to identify the leading countries in e-Government development for comparison with Ukraine, and to apply their positive experience in implementing e-portals, creating the necessary regulatory framework, disseminating the Internet, and attracting citizens to participate in the processes of forming the information society. The article explores the dynamics of E-Government Development Index (EGDI) and E-Participation Index (EPI), analyzes the achievements of developed countries in e-government, and identifies leading countries such as the United Kingdom, France and Spain whose experience is useful for its application in Ukraine. The qualitative analysis of the achievements of different countries was based on the UN e-Government knowledgebase and the United Nations E-Government Survey from 2003 to 2018, information from e-Governance research articles, government website data, newsletters, and research findings. The study of e-government practice in leading countries and in Ukraine shows that the development of public information space has many similarities and the process of e-government formation in developing countries in many spheres follows the path of developed countries, preserving their own national features. The authors of the article have identified the main common components of this process, outlined aspects of improving the practice of e-government in the direction of building an effective system of public administration.
Single-cell analysis reveals different age-related somatic mutation profiles between stem and differentiated cells in human liver

Somatic mutation levels in human liver increase with age and are higher in differentiated hepatocytes than in residential LSCs. Accumulating somatic mutations have been implicated in age-related cellular degeneration and death. Because of their random nature and low abundance, somatic mutations are difficult to detect except in single cells or clonal cell lineages. Here, we show that in single hepatocytes from human liver, an organ exposed to high levels of genotoxic stress, somatic mutation frequencies are high and increase substantially with age. Considerably lower mutation frequencies were observed in liver stem cells (LSCs) and organoids derived from them. Mutational spectra in hepatocytes showed signatures of oxidative stress that were different in old age and in LSCs. A considerable number of mutations were found in functional parts of the liver genome, suggesting that somatic mutagenesis could causally contribute to the age-related functional decline and increased incidence of disease of human liver. These results underscore the importance of stem cells in maintaining genome sequence integrity in aging somatic tissues.
Observing User Interface Design Patterns for Websites from a User-experience Point-of-View

Nowadays, user dashboards have been widely used everywhere, and the design complexity is growing with the more and more advanced technology. A very important aspect in user dashboards design is their specifications that describe what the systems have to do. The specification should provide criteria for the systems to be designed. The criteria are formulated in a specification language, which is kept preferably on a high abstraction level and, for example, need not be executable. The specification gives a formal model by class-library extensions, by this way to ensure the consistency of the systems and define the properties of the systems. In many modern applications, graphs play important role in representing the specifications of user dashboards. The richness and practical purposes are needed by the specifications. The richness comes from several resources, which have the variations in the way of different types of graphs. Besides the general graph, there are Conditional Process Graph (CPG), Petri nets and other types of graphs. It turns more difficult to work on these graph representations in a textual format since now the user dashboards become more and more complicated. We need to develop a visual dashboard, which users can design and edit the graph visually based on certain form of specifications. There exist some kind of dashboards for graphs, but they each mostly focus on one type of graph at a time. If new graph is introduced, they cannot work anymore. So, we propose an extensible visual dashboard, which can edit many types of graph with their own specifications that are defined in formal ways. All the representations in the dashboard are graph-based and they share common concepts such like edges and nodes. By this way, the dashboard becomes extensible and it is not simply the combination of several dashboards. In this paper, we study different methods to design user dashboards, and evaluate the best practices in designing the same.
A Traditional Chinese Medicine Prescription Recommendation method based on Mutual Information Clustering

Traditional Chinese medicine (TCM) data is the main knowledge resource of TCM, which contains a wealth of clinical experience knowledge. Machine learning has made remarkable achievements in natural language processing. As the carrier of TCM knowledge and information stored in the form of text, using machine learning method to study these TCM data can save a lot of manpower cost, improve the objectivity of TCM, promote TCM related knowledge better, and have certain guiding significance for the research of TCM human engineering experiment. This paper proposes a recommendation algorithm based on mutual information clustering. Its core idea is calculating mutual information between two symptoms, and set symptom “relatives and friends group”, after getting the symptom clustering results of mutual information, then combine the clustering results and search algorithm to achieve the effect of recommendation and filtering. Experimental results show that the proposed method is effective.
The impact of antibiotics on the metabolic status of obese adults without bacterial infection: a systematic review and meta-analysis

Background The gut microbiota is involved in the pathophysiology of obesity. It is known that oral antibiotics manipulate the gut microbiota; however, the impact on host metabolism of obese adults without bacterial infection has not been systematically summarized. Methods We searched for randomized, placebo-controlled trials that investigated the effects of oral antibiotics on the metabolic status in obese adults via Medline, EMBASE, and the Cochrane Library. Primary outcomes were homeostasis model assessment of insulin resistance (HOMA-IR), body weight, and rate of diarrhea. Additional outcomes included fasting plasma glucose (FPG), plasma glucagon-like peptide-1 (GLP-1), waist circumference, fecal short-chain fatty acid (SCFA) levels, and all adverse events. We assessed the certainty of evidence based on Grading of Recommendations, Assessment, Development and Evaluations. Results Among 1,762 articles screened, four studies were eligible for quantitative analysis, two of which were applied to meta-analysis. Oral antibiotics had low influence on HOMA-IR [mean difference (MD) 0.09 (95% CI: −0.96 to 1.13)], body weight [MD 4.1 kg (95% CI: −23.77 to 31.97)], FPG [MD −0.12 mmol/L (95% CI: −0.47 to 0.23)], and GLP-1 [MD 0.20 pmol/L (95% CI: −2.36 to 2.76)] compared to placebo. Antibiotics treatment altered fecal acetate and butyrate levels, but resulted in little difference in propionate levels [MD −13.60 µmol/g (95% CI: −22.43 to −4.77), MD −7.60 µmol/g (−10.97 to −4.23), MD −1.10 µmol/g (95% CI: −4.18 to 1.98), respectively]. Several adverse events, such as sun sensitivity and gastrointestinal discomfort, were reported following antibiotics treatment, but no diarrhea. The certainty of evidence for most outcomes was very low to low, except for fecal SCFAs. Conclusions Our results indicate that oral antibiotics treatment is insufficient to ameliorate metabolic parameters in obese adults, suggesting that oral antibiotics treatment may not qualify as a therapeutic approach for obesity.
REAÇÕES DO MERCADO ACIONÁRIO AO ANÚNCIO DE REVISÃO DO RATING DE CRÉDITO SOBERANO DO BRASIL

Os anos 2008 e 2015 foram particularizados por dois eventos expressivos para o ambiente de negocios brasileiro: elevacao para o Grau de Investimento e rebaixamento para Grau Especulativo do rating de credito soberano. A partir desse contexto, a presente pesquisa teve como objetivo examinar a reacao do mercado de capitais brasileiro a elevacao ao Grau de Investimento e ao rebaixamento ao Grau Especulativo do rating soberano. Apoiada em pesquisas previas de abordagem semelhante, foram estabelecidas quatro hipoteses relacionando os anuncios as acoes ordinarias e preferenciais de companhias brasileiras. O estudo considerou as empresas listadas no Ibovespa no dia da revisao da nota para Grau de Investimento e no dia da revisao para Grau Especulativo. Com aplicacao de estudos de eventos, as hipoteses foram examinadas por meio de Analise da Variância e Teste de Sinais para Retornos Anormais e Retornos Anormais Acumulados. Nao foram constatados retornos anormais para o evento de elevacao do rating de credito soberano. Condizente com resultados de pesquisas anteriores, a pesquisa mostrou presenca de retornos anormais negativos e significativos para acoes ordinarias quando do rebaixamento do rating soberano.
Online Rpi-Web-Server based Blood Cell Analysis for Fast Diagnosis and Monitoring of Disorders for Remote Stations

Government of India had already undertaken various steps for developing health care stations at villages and remote places. But it is not possible to provide the expert physicians and doctors at these places. Government had appointed care takers and nurses at these places. In case of any emergency, proper care may not be possible in proper way. Some remote monitoring systems that can be used for remote assistance may be developed. Experts may remotely analyze the defined problems and may immediately suggest the solution that may be responsible to the saving of one’s life. We have developed a system that can perform the WBCs, RBCs and platelets count from the blood sample taken by caretakers. The microscopic images of blood sample are captured and then they are stitched using novel approach of Hybrid Ero-Dilation based circular stitching and processed for counting cells automatically with this system designed with Raspberry Pi. The results and samples are stored in to the system and can be remotely accessed with embedded web server. Embedded web-server is designed for the counting of WBC available in blood sample based on image processing. MATLAB code is designed and called into python for the execution with Raspberry pi processor. Web-server is designed and embedded into the Raspberry pi processor for accessing remotely from outside worlds.
Effects of Moderate Intensity Exercise on Glutathione Peroxidase Activity and VO2max in Elderly Women

BACKGROUND: Sedentary lifestyle in the elderly decreases the function of cardiovascular system may lead reduction performance. Many previous studies reported that moderate intensity aerobic exercise was recommended for older persons because it may increases reactive oxygen species (ROS) at optimum level. The increasing of ROS can activate antioxidant mechanism against oxidatif stress due to exercise. AIM: The aim of this study was to investigate the change of glutathione peroxidase (GPx) activity and VO2max on moderate intensity aerobic exercise and its correlation. METHODS: The study design was quasi-experimental. Subjects were sedentary elderly women age 65 ± 5.06 years old. Total subject was 73 persons selected by consecutive sampling. Subjects did moderate intensity aerobic exercise for 12 weeks by walking for 30 min a day, 3 times a week at 50–85% of maximum heart rate. The parameters were measured on the baseline and 12 weeks after exercise. GPx activity from the plasma was examined by ELISA and the VO2max was measured by 6-min walking distance. The data were analyzed by unpaired t-test and Spearman test. RESULTS: GPx activity and VO2max were significantly increased about 41.75% and 24.11% (p < 0.05) on the experimental group, respectively. There was a correlation between GPx activity and VO2max (r = 0.223, p = 0.041). CONCLUSION: Regular moderate intensity aerobic exercise significantly increased GPx activity and VO2max. This kind of exercise is advised for the elderly because it can elevate antioxidant level as a defense against oxidative stress due to aging; therefore, it can improve aerobic capacity in the elderly.
Representatividade da Mulher Contadora em Escritórios de Contabilidade e a Desigualdade de Gênero na Prática Contábil: Uma Questão ainda em Debate?

O objetivo deste estudo consistiu em analisar as vivências da prática contábil, com enfoque na divisão do trabalho e nas desigualdades de gênero encontradas por mulheres contadoras que exercem a profissão em escritórios de contabilidade de pequeno porte. Em termos metodológicos, trata-se de uma pesquisa qualitativa-descritiva orientada pelos pressupostos do interpretativismo, interessada em compreender uma realidade que não pode ser quantificada, de natureza subjetiva, qual seja, as vivências da prática contábil de mulheres contadoras, por meio da análise de seus relatos profissionais. Os resultados apontam que os espaços profissionais da contabilidade brasileira ainda não conseguiram alcançar uma distribuição equitativa de cargos e salários entre os gêneros no ambiente de trabalho. Quando se analisa o mercado e a área de atuação contábil, a presença profissional das mulheres contadoras tem crescido em termos numéricos, mas elas ainda se identificam com os valores culturais de dominação masculina da profissão, reproduzindo-os e legitimando-os, o que dificulta o seu processo de igualdade, perpetuando a desigualdade de gênero na divisão do trabalho. Como principal contribuição, esse estudo observou a continuidade das desigualdades de gênero na prática contábil, especialmente nos escritórios de contabilidade de pequeno porte, locus da pesquisa. A medida que a presença da mulher contadora avança em termos numéricos, a segregação vertical persiste, uma vez que as contadoras ainda enfrentam dificuldades para assumirem altos cargos nas organizações, configurando, dessa forma, a importância de disseminar essa discussão com implicações para o mercado de trabalho e o desenvolvimento da sociedade.