Miracle-dz/UniFAR-FTUs huggingface dataset:
Electrodeposition of Metals in Catalyst Synthesis: The Case of Platinum Monolayer Electrocatalysts

The concern about energy sources, their availability, and related environmental effects, is at an all time high. Proton Exchange Membrane Fuel Cells (PEMFCs) - with an efficiency higher than that of internal combustion engines, light weight, low operating temperature, and fast-start-up capability - are strong candidates for automotive applications. Transportation applications could be especially important in shaping up the new energy economy since they may entail a substantial decrease in the adverse environmental effects linked to the use of fossil fuels and prolong their availability. The largest portion of the cost of PEMFCs reflects the large amount of Pt needed in the cathode's catalytic layer due to the low catalytic activity of Pt for the oxygen reduction reaction (ORR). Recently, considerable advances have been made in fuel cell electrocatalysis yielding improved electrocatalysts, and increasing our understanding of the kinetics of the ORR in combination with significant advances in theoretical treatments. Some of these studies involved: (1) alloying Pt to synthesize bi-metallic catalysts, (2) core-shell nanoparticles catalysts, (3) the role of size, structure, and shape of nanoparticles, and (4) de-alloying of bimetallic alloys. However, a complete understanding of the ORR kinetics on Pt, the best single element catalyst, and of itsmore » low efficiency, is yet to be achieved. These problems, compounded with the high Pt content in current cathode catalysts, and with their gradual loss of performance under operating conditions, still hamper commercialization of fuel cells. In order to minimize the amount of noble metal electrocatalysts and maximize their utilization, while achieving high catalytic activity, numerous synthetic approaches have been attempted. The electrocatalysts were prepared using vacuum deposition methods, wet chemistry methods, or electrodeposition techniques. Electrodeposition in particular has several attractive features with respect to the application in catalyst synthesis such as simplicity of operation and ease of control of the deposition conditions. In this article we describe the application of metal electrodeposition in the synthesis of a new type of electrocatalysts comprising a Pt monolayer (Pt{sub ML}) on metal or alloy nanoparticles. The concept of Pt{sub ML} electrocatalysts offers a possible solution to the impasse caused by a slow ORR kinetics and the consequent large Pt content of conventional electrocatalysts. A Pt{sub ML} shell on a nanoparticle substrate core ensures that every Pt atom is available for catalytic activity; in other words, a Pt{sub ML} achieves the ultimate reduction in Pt loading and complete Pt utilization. Also, through geometric and electronic interaction with the substrate a Pt{sub ML} can change its electronic properties and be more active and durable than pure-Pt electrocatalysts. « less
Waterborne, abiotic and other indirectly transmitted (W.A.I.T.) infections are defined by the dynamics of free-living pathogens and environmental reservoirs

While the ecology of infectious disease is a rich field with decades worth of empirical evidence and theory, there are aspects that remain relatively under-examined. One example is the importance of the free-living survival stage of certain pathogens, and especially is cases where they are transmitted indirectly between hosts through an environmental reservoir intermediate. In this study, we develop an integrated, broadly applicable mathematical method to examine diseases fitting this description—the waterborne, abiotic and other indirectly transmitted (W.A.I.T.) infection framework. To demonstrate its utility, we construct realistic models of two very different epidemic scenarios: cholera in a densely populated setting with limited access to clean drinking water and hepatitis C virus in an urban setting of injection-drug users. Using these two exemplars, we find that the W.A.I.T. model fortifies the centrality of reservoir dynamics in the “sit and wait” infection strategy, and provides a way to simulate a diverse set of intervention strategies.
Temperature characteristics of FBG sensors with different coatings for High Temperature Superconductor Application

Fiber Bragg Grating (FBG) sensors LV one of the promising sensing element for temperature measurement in High Temperature superconductor (HTS) field. The main concern of using FBG sensors for cryogenic temperature sensing is how to increase the low temperature sensitivity caused by the decrease thermal expansion coefficient of silica-glass at low temperatures. This work studied the temperature characteristics of bare FBG and FBG coated with gold and silver for 77-293 K. The temperature characteristics of FBG sensors was studied theoretically and experimentally at first. Then the FBG’s thermal response time was evaluated through a sudden temperature change test. Results show that preferable temperature sensitivity can be obtained by the proposed coating materials, and there is a 300 ms response time delay of coated sensors compared with the bare FBG.
Financial Standard Relationship with Institute Quality

: This study aims to determine the relationship between the standard of financing and the quality of the institution. This study is important, is important, because of the need in the field, so that educational institutions are able to improve the quality of education based on appropriate financing. This research uses descriptive method of technical analysis. In analyzing the data of standard financing relationship to student achievement, the researcher submits a question or questionnaire to 10 staff teachers and 20 students as many as 10 items for variable X (Financing Standard) and 10 items for variable Y (Student Achievement). The results of this study are the results of the correlation obtained can be said as a weak or low negative correlation, the results of which are -0.275. From these results, it is known that the use of financing standards does not affect the quality of an institution with a weak or low correlation between 0.20 - 0.40. Factors that cause learning achievement can be improved, among others: a. Good management, b. Good interaction between educators and students, c. Adequate facilities and infrastructure, d. Motivation of educators and students, e. Qualified and professional educators, e. A conducive school environment.
Improving Nurse Managers’ Competencies: A Systematic Review

: Nurse managers’ competencies greatly influence the quality of services and nursing care. Consequently, the aim of this study is to identify and to define the competencies of nurses working in management roles in the healthcare system so they can undertake their roles effectively. This research used a systematic literature review design and analysed 40 articles. Twenty-five studies were from Europe and 15 from outside Europe. The literature was limited to articles published in English between November 2003 and 2018 that were searched using these keywords: nurse manager, competence, nurses, career plan, improving, assessment tools, clinical competence, professional competence. In this study, six dimensions of nursing managers’ competencies emerged: sociodemographics, technical, networking, administrative, staff development, and legal and ethical. This literature review provided scientific evidence for decision makers to consider the implementation of a nurse manager competency system, including leadership development, the redesigning of managers’ role, building networks, clinical skills and climbing the career ladder. Future studies are suggested to investigate the usefulness of the competency model for assessing nursing managers’ readiness to between job applicants, implement continuing education programmes for nurse managers, and develop and plan their careers.
Hubungan Need for Cognition Dengan Perilaku Prososial Mahasiswa

Penelitian ini bertujuan untuk mengetahui bagaimana hubungan Need For Cognition dengan perilaku mahasiswa prososial di Program Studi Psikologi Universitas Mulawarman Samarinda. Populasi dalam penelitian ini adalah seluruh mahasiswa Program Studi Psikologi Universitas Mulawarman Samarinda. Sampel dalam penelitian ini sebanyak 88 orang. Sampel yang digunakan dalam penelitian ini dijumlahkan dengan teknik Random Sampling. Analisis data menggunakan model skala likert. Skala tersebut adalah skala perilaku prososial dan skala kebutuhan akan kognisi. Analisis data menggunakan uji korelasi product moment dan dibantu dengan program Statistical Package for Social Sciences (SPSS) 20.0 for Windows. Hasil penelitian menunjukkan bahwa terdapat hubungan antara perilaku prososial dengan kebutuhan kognisi sebesar 0,751 dengan p = 0,000. Artinya ada hubungan yang kuat dan sangat signifikan antara kebutuhan kognisi dengan perilaku prososial pada mahasiswa Program Studi Psikologi Universitas Mulawarman.
Development of cellulolytic nitrogen-fixing activity of Azotobacter spp. by transposon mutagenesis

The chemical mutagenized microorganisms used in this study were nitrogen-fixing bacteria; Azotobacter chrococcum and Azotobacter benjerinkii which were collected from the Microbiology Laboratory, Department of Biotechnology, Kyaukse. Transposon mutagenesis was studied on these strains to get dual activities such as nitrogen-fixing and cellulolytic activities by using recombinant Escherichia coli S17 carrying cellulase gene from Rhizobium leguminosarum. The targeted strains that carry the transposon were selected on the Glucose Nitrogen Free Mineral Medium which contains chloramphenicol (0.6 mg/20ml) and kanamycin (0.4mg/20ml). Nitrogen-fixing activity of Azotobacter spp. was detected by the colour changes in Glucose Nitrogen Free Mineral Medium (G-NFM) containing trace amount of Bromothymol Blue (BTB) as indicator and ammonium test kit. Cellulolytic activity of Azotobacter spp. before and after transposon mutagenesis was detected by both plate screening method and by Dinitrosalicylic colorimetric method. The nitrogen-fixing activities of the strains were almost the same before and after transposon mutagenesis. Cellulolytic activity measured in Glucose Nitrogen Free Mineral Medium was the highest in 5 days incubation.
Magnetic fluidized bed for sample preconcentration and immunoextraction in microfluidic systems

We developed a novel microfluidic device in which magnetic particles are maintained dynamically in a microchamber and undergo hydrodynamic recirculation. From a physical point of view, this dense dynamical system is reminiscent of fluidized beds and its behaviour has been interpreted in this frame. Gravitational fluidized beds were widely investigated in the macroscopic worlds but their integration in microfluidics is hardly possible as they provide a very limited dynamic range. Magnetic forces offer the opportunity to extend the concept of fluidized bed to miniaturized systems and to our knowledge, this is the first implementation of a magnetically stabilized fluidized bed in microfluidics. Previous systems consisted in either low density static or dynamic systems in which columns are trapped in a strong and local field potential. These systems have a higher potential capacity, but limited capture efficiency. The new system developed here bridges the gap between these two previous strategies and opens new regimes of operation combining a high density of magnetic particles, for high capacity, an active hydrodynamic stirring for increased kinetics and a high flow rate allowing concentration of very dilute analytes from a rather large sample volume. This system was validated in an immunoassay using a stop-and-go strategy taking full advantage of the dynamic nature of the magnetic microcolumn. We believe, however, that it also has strong potential of preconcentration of analytes from ml to µl or nl sized sample downstream microfluidic analysis modules. This laboratory is involved in the EU Nadine, aimed at developing early diagnosis of Alzheimer's disease in blood.
EFEITO DO FNP VERSUS ALONGAMENTO AUTO PASSIVO NA FLEXIBILIDADE DE ISQUIOTIBIAIS EM INDIVÍDUOS SAUDÁVEIS COM INATIVIDADE FÍSICA

RESUMO O objetivo do presente estudo foi comparar os efeitos da tecnica contrai-relaxa do metodo FNP em relacao a um protocolo de alongamento auto passivo. Realizou-se um ensaio clinico randomizado cego, em individuos com inatividade fisica entre 18 e 60 anos. Randomizados em dois grupos de intervencao: grupo 1 FNP e grupo 2 protocolo de alongamento auto passivo (AAP). Os individuos foram submetidos ao teste Banco de Wells e Dedos ao Solo pre-intervencao, pos-intervencao e follow up de 30 dias. Os valores obtidos para as avaliacoes atraves do Banco de Wells e no Teste Dedos ao Solo, pre-intervencao, pos-intervencao e follow up no grupo FNP, foram diferentes estatisticamente quando comparado aos valores obtidos no grupo AAP. O metodo FNP foi mais eficaz do que o AAP no que diz respeito ao aumento da flexibilidade dos isquiotibiais e manutencao do ganho apos trinta dias.
Entertainment-social Celebrity Worship Syndrome of Female Adolescents using Social-media in Indonesia

: This study aims to determine the relationship between extraversion of Eysenck’s personality dimensions and entertainment-social level of celebrity worship syndrome in female adolescents who use social media. This study is a replication of previous study (Maltby, et al., 2003) with different context and assumed that extraversion was related to entertainment-social. Female adolescents use social media massively and idolizing is commonly found in this development stage. This study was conducted on 587 participants with age ranged between 12-20 years old. The data were collected by questionnaire. The variables were measured by Revised Eysenck Personality Questionnaire-Abbreviated Version (EPQR-A) and Celebrity Attitude Scale (CAS). Result shows that social media users tend to be neurotic and experiencing entertainment-social worship while no significant relationships are found between both extraversion and psychoticism to entertainment-social. This could be explained by higher tendency of neuroticism in female adolescents and using social media to interact with peers or so-called pseudo-friends in celebrity fan club .
Geographic patterns and environmental determinants of gymnosperm species diversity in China

: How large-scale patterns of species diversity emerge is a central yet controversial issue in ecology and biogeography. Despite the long history of studies the mechanisms driving species diversity patterns in space remain poorly known. Using distribution data of all gymnosperm species in China, we assessed the influence of environmental factors on spatial patterns of species diversity in China. Further, we evaluated the proportion of gymnosperms in local floras. We found that species diversity of gymnosperms decreases along a south–north axis. Hengduan Mountains, with the highest species diversity, is a hotspot of gymnosperms. Species diversity patterns differ significantly between the gymnosperm subclasses. In particular, the species diversity pattern of Pinidae is similar to that of all species combined, while the species diversity of Gnetidae is highest in the drylands of northwestern China. In contrast, Cycadidae is restricted to southern China. Environmental heterogeneity and precipitation are the best predictors of species diversity patterns of all gymnosperms combined, followed by temperature anomaly since the Last Glacial Maximum (LGM), elevational range and energy. That different factors predict species diversity patterns of different gymnosperm subclasses, may reflect the differences in their evolutionary history and physiological adaptions. The ratio of gymnosperm to angiosperm species diversity is lower in the warm and humid eastern and southern parts of China, and increases towards the drylands in western and northern parts. Environmental energy and precipitation were good predictors of the ratio of gymnosperms to angiosperms. Specifically, the ratio decreases with increase of energy and decrease of precipitation suggesting that angiosperms may have stronger competitive ability in warm and humid regions while gymnosperms adapt better to dry and cold environments.
Experience with Mortalities of Cultured Catfish Ictalurus punctatus (Rafinesque 1818) and I. punctatus X I. furcatus (Valenciennes 1840) caused by Highly Virulent Strains of Aeromonas hydrophila

Epizootic outbreaks of motile aeromonad septicaemia (MAS) due to Aeromonas hydrophila infections in channel catfish Ictalurus punctatus (Rafinesque 1818) and hybrid catfish I. punctatus x I. furcatus (Valenciennes 1840) spread through West Alabama and East Mississippi, United States of America in 2009 and have been seasonally recurrent, with losses in the millions of pounds. While A. hydrophila is typically considered an opportunistic pathogen, no other primary aetiologic agent has been found. Mortalities are as high as 60 % in ponds and primarily affect larger fish, causing diseases characteristic of MAS infections that include severe skin ulceration and haemorrhage, generalized petechiation, ascites, marked splenomegaly with necrosis, and gastric haemorrhage. A multistate research group (Alabama, Arkansas, Louisiana and Mississippi) examined A. hydrophila isolates, which were found to be highly clonal by phylogenetic analyses of gene sequences ( atpD, dnaJ, dnaX, gyrA, gyrB, recA, rpoD ). A representative strain of the hypervirulent A. hydrophila pathotype (vAh), ML09-119, was found to be more virulent in channel catfish than historical A. hydrophila strains
Exploring the Problems Towards Entrepreneurship Development in Pakistan

The entrepreneurship has been widely described by researchers as intermingling of the different innovative techniques used by the individuals through risk taking behavior to avail the available business opportunity. The entrepreneurship has some positive as well as negative consequences for individual who desired to invest their resources in the business opportunities. In Pakistan, there are many opportunities for entrepreneurship development as supported by government in diverse spheres. In Pakistan, the risk taking and innovation is inhibited severely by invasive role of government in marketplaces related to the diverse businesses. To examine phenomenon by analyzing the views, the data was collected from students hailing from the universities located in southern region of Khyber Pakhtunkhwa, Pakistan. The study is expected to provide certain valuable information about relationships among the research variables thereby extracting some recommendation from the results for the policy makers and future researchers to cater the situation related with entrepreneurship development in Pakistan.
Fostering Personal Knowledge and Competences in Higher Education Guidance Processes

Education is a constantly ongoing process that allows individuals to interpret and transform reality. The variety of life contexts, formal, non-formal or informal, are explicitly or latently involved in this process and contribute decisively to building a personal knowledge and competence system at the basis of subjectivity. The aim of this paper is to highlight the role played by knowledge and competence arising from personal experience within profiles of professional competences, to implement possible reflective paths in higher education guidance processes.
Contributions de l'ornithine aminotransférase dans les réponses physiologiques aux contraintes métaboliques chez la souris

Les acides amines sont des molecules importantes pour la synthese des proteines, la fourniture de substrats energetiques ou la production de facteurs de regulation de l'activite cellulaire. L'ornithine aminotransferase {OAT} est une enzyme clef du metabolisme des acides amines qui relie l'arginine, un acide amine indispensable a la synthese proteique au cours de la croissance, et le glutamate, la glutamine et l'a-cetoglutarate, qui peuvent etre transformees en glucose. Nous nous sommes interesses a la caracterisation biochimique de l'activite de l'OAT et a ses variations chez la souris, en utilisant deux contraintes physiologiques, le developpement postnatal et l'exposition au froid. Au cours d'une premiere etude, nous avons caracterise une activite OAT fonctionnelle dans tous les organes etudies. Nous avons demontre l'existence d'un dimorphisme sexuel de l'activite, en faveur des femelles, dans la plupart des organes. Dans une seconde etude, nous avons montre des variations organe et sexe specifiques de l'activite OAT au cours du developpement postnatal en reponse aux besoins specifiques en acides amines : une regulation de l'expression de l'OAT par la testosterone et le changement de regime alimentaire lors du sevrage ; une contribution potentielle importante et insoupconnee du muscle squelettique au metabolisme de l'ornithine. Enfin, nous avons mis en evidence que l'exposition au froid augmente ou diminue l'activite OAT de facon tissu-specifique en liaison avec les besoins energetiques de l'organisme. Nos resultats montrent que l'activite OAT est modulee dans les differents organes en fonction des besoins en acides amines et en substrats. Cela suggere un role important du metabolisme des acides amines dans les reponses adaptatives des organismes a leur environnement
Tuberkulozni meningitis s tuberkuloznim granulomima u trudnoći – prikaz bolesnika

Tuberculous meningitis (TBM) is a severe consequence of Mycobacterium tuberculosis infection. Early clinical manifestations are often non-specific. In this case study, we showed tuberculous meningitis with tuberculous granulomas in a female patient during and after pregnancy, with all diagnostic and therapeutic dilemmas we had during her treatment. The patient was treated for 18 months. Our diagnostic findings showed extended pleocytosis and high protein level in cerebrospinal fluid (CSF), development of tuberculous granulomas in brain with relatively low inflammation parameters. Since it has been only a several days from the onset of the first symptoms to the beginning of treatment, the first signs of recovery showed very soon, despite development of the tuberculous granulomas. In the first 12 months tuberculostatic (TS) treatment was continuous, but after that period, treatment was intermittent for the next 6 months. After the treatment, a patient’s clinical and neurological status was normal as well as CSF analysis and neuroradiological findings. Olja Čuković1 Antonija Verhaz1 Tatjana Roganović1 Irena Katan1 Zorislava Bajić2 1 Klinika za infektivne bolesti UKC RS Banja Luka, BiH 2 Medicinski fakultet Univerziteta u Banja Luci, BiH Prikaz bolesnika/Case report Adresa za dopisivanje: Olja Čuković e-mail: olja.cukovic@kc-bl.com Ključne riječi: tuberkuloza tuberkulozni meningitis tuberkulozni granulom