bluuebunny/crossref_metadata_2025 huggingface dataset:
A Single Medical Marker for Diagnosis of Methamphetamine Addiction - DNA Methylation of SHATI/NAT8L Promoter Sites from Patient Blood
Authors: Yuka Kusui , Nishizawa Daisuke , Hasegawa Junko , Uno Kyosuke , Miyanishi Hajime , Ujike Hiroshi , Ozaki Norio , Inada Toshiya , Iwata Nakao , Sora Ichiro , Iyo Masaomi , Yamada Mitsuhiko , Kondo Naoki , Won Moo-Jun , Naruse Nobuya , Uehara-Aoyama Kumi , Ikeda Kazutaka , Nitta Atsumi
Published: January 2020

Background:

Methamphetamine (METH) is one of the most widely distributed psychostimulants
worldwide. Despite active counter measures taken by different countries, neither overall usage of METH nor the
frequency of repeat users has reduced over the past decade. METH induces abuse and dependence as it acts on the
central nervous system and temporarily stimulates the brain. The recidivism rate for abuse of stimulants in Japan
is very high and therefore prevention of repeated usage is paramount. However, we lack information about the
relationship between METH users and genomic changes in humans in Japan, which would provide important
information to aid such efforts.

Objective:

Shati/Nat8l is a METH-inducible molecule and its overexpression has protective effects on the brain
upon METH usage. Here we investigated the effect of METH usage on DNA methylation rates at the promoter
site of SHATI/NAT8L. We used DNA samples from human METH users, who are usually difficult to recruit in
Japan.

Methods:

We measured DNA methylation at SHATI/NAT8L promoter sites by pyrosequencing method using 193
samples of METH users and 60 samples of healthy subjects. In this method, DNA methylation is measured by
utilizing the property that only non-methylated cytosine changes to urasil after bisulfite conversion.

Results:

We found that the rate of DNA methylation at six CpG islands of SHATI/NAT8L promoter sites is significantly
higher in METH users when compared to healthy subjects.

Conclusion:

These results suggest that the DNA methylation rate of SHATI/NAT8L promotor regions offers a
new diagnostic method for METH usage.
A Comprehensive Review: Bio-Potential of Barbituric Acid and its Analogues
Authors: Shafiq Nusrat , Arshad Uzma , Zarren Gul , Parveen Shagufta , Javed Irum , Ashraf Aisha
Published: January 2020

In our present work, we emphasized on the potential of barbituric acid (1) derivatives as drugs like anti-bacterial, hypnotic, sedative, anti-microbial and antifungal agents. As naturally occurring, barbituric acid (1) is inactive but in the derivative form, it has a large number of medicinal uses and nowadays, it has a great demand in the pharmaceutical industry. Barbituric acid has a wide range of applications in the synthesis of a diverse class of compounds like heterocyclic, carbocyclic, synthetic alkaloids, and due to its broad-spectrum applications, barbituric acid acquired the position of building blocks in synthetic chemistry. Through the history of humanity, a number of bioactive agents have been applied to cure the disease related to hypnotics and sedatives, while the exact efficacy of these agents was found to be limited. Till now, review articles on barbituric acid only express their specific aspect but in present review article, all aspects are discussed in detail to provide a platform to readers and researchers so that they could obtain all information and background knowledge from a single point.
Development and Antimicrobial Evaluation of Eruca Sativa Oil Nanoemulgel with Determination of the Oil Antioxidant, Sun Protection Factor and Elastase Inhibition
Authors: Eid Ahmad M. , Jaradat Nidal A. , Al-Masri Motasem , Issa Linda , Zubidat Fatimah , Asrawi Hanan , Ahmad Samah
Published: January 2020

Objective:

This project aims to develop a bio-natural nano-product with Cosmeceutical and pharmaceutical applications.

Methods:

E. sativa oil was evaluated for its anti-oxidant, sun protection factor and elastase inhibition. Then, nanoemulgel formulations were prepared for E. sativa oil through the combination of nanoemulsion with hydrogel. E. sativa nanoemulsion formulations were prepared by the help of a selfemulsification technique. After this, the optimum formulation was mixed with Carbopol to produce the nanoemulgel. Anti-bacterial and anti-fungal activities were evaluated.

Results:

Nanoemulsion occurred when the size of the droplets was 195.29 nm with the lowest polydispersibility index 0.207. The results of antioxidant, anti-elastase and SPF activities for E. sativa oil were 2.10 µg/ml, 25.1 µg/ml and an SPF value of 5.57, respectively. In addition, in the anti-bacterial test for Staphylococcus aureus, it was found that nanoemulgel has an inhibition zone of 2.1 cm in diameter. According to the MRSA, the inhibition zone was 1.5 cm.

Conclusion:

E. Sativa oil could be a promising candidate in cosmeceutical and pharmaceutical preparations.
THE LEARNING TRAJECTORY OF NUMBER PATTERN LEARNING USING BARATHAYUDHA WAR STORIES AND UNO STACKO
Authors: Risdiyanti Irma , Prahmana Rully Charitas Indra
Published: January 2020

In recent years, several researchers have tried to use stories and games as a starting point for learning mathematics. This is allegedly able to increase students' mathematical abilities and make learning mathematics more enjoyable. Therefore, this research is aimed to design a mathematics learning trajectory in pattern number using Barathayudha War Stories and Uno Stacko games as a starting point or context in the learning process with the Indonesian Realistic Mathematics Education (IRME) approach. The research method used is a design research that contains three stages, preliminary design, teaching experiment, and retrospective analysis. The result of this research is the learning trajectory design of number pattern learning using Barathayudha war stories and Uno Stacko. The design consists of four activities, which is a detective of Barathayudha war; rebuilt Abimayu fortress at the battlefield of Kurusetra; find the unique secret number code of Abimayu fortress; and built another fort using number pattern. The results showed Barathayudha war stories and Uno Stacko can stimulate students to understand their knowledge of pattern number concept which is the stages in the learning trajectory of student have an essential role in understanding the concept.
O paradoxo sublime ou a alforria da arte
Authors: Figueiredo Virginia
Published: January 2020

Neste texto, pretendo analisar a tese principal do ensaio “A verdade sublime” de Philippe Lacoue-Labarthe, a qual poderia ser formulada do seguinte modo: a verdade sublime é o Ereignis, esse é o fundamento a partir do qual se desenvolveu uma dificílima operação que consistiu em modificar a tradição do sublime sempre apresentado negativamente naquilo que Lacoue-Labarthe chamou de "compreensão afirmativa do sublime ou da grande arte". O autor estabelece uma astuciosa aliança entre o que há de mais radical no pensamento de Heidegger e o sublime, tratado de maneira bastante polêmica, como a principal teoria da arte de Kant. Dessa articulação fundamental, pode-se concluir que ele não está apenas à procura de uma “Estética” (sequer de uma “Teoria da Arte”) sublime, mas, em busca de algo que é muito mais ambicioso, a saber: de um pensamento do sublime. Portanto, na minha opinião, o ensaio lacouelabarthiano constitui, por um lado, uma referência indispensável não só a quem quer que pretenda estudar a tradição do sublime, mas, por outro, compreender o pensamento heideggeriano sobre a arte e sua tentativa de encontrar uma determinação mais essencial e, sobretudo, ousaria dizer, mais política da arte.
O sujeito está na arte
Authors: Rivera Tania
Published: January 2020

“Wo Es war, soll Ich werden” (Ali onde isso estava, eu devo advir). Uma das frases mais célebres da história da psicanálise se inicia com uma referência espacial, contida na partícula “wo” (onde). Partindo dessa constatação, o artigo mostra como as obras de Cildo Meireles (Estudo para espaço) e Laura Lima (Grande), ao subverterem nossa construção imaginária do espaço, provocam um descentramento do eu e uma subversão do sujeito análogos ao que ocorre em uma análise.
Ghazaliâ€™s Sufism and Its Influence in Indonesia
Authors: Ismail A Ilyas , Uyuni Badrah
Published: January 2020

This study aims to describe Ghazaliâ€™s sufism and its influences in Southeast Asia, mainly in Indonesia. Al-Ghazali is a renowned Muslim intellectual who has a special place at every Moslemâ€™s heart, especially in Indonesia. He possesses encyclopedic expertise within various disciplines, ranging from fiqh and ulusulfiqh, al-kalam, logic, philosophy, and sufism. Despite his vast expertise, his practices are more well-known in sufism than in Islamic law, theology, and philosophy due to his long journey, exquisite experience, and groundbreaking thinking within the discipline of Sufism. Ghazali developed a new method of thinking within Islamic epistemology, widely known as Irfani epistemology. One of Ghazaliâ€™s biggest achievements is that Ghazali is considered successful in integrating between Sufism and the fiqh (sharia) Ghazali demonstrated his intellectual brilliance of integrating both branches of Islamic thinking (between sharia and the essence of Islam). Ghazaliâ€™s notable influence and position within the discipline of sufism made him granted the title of â€œHujjat al-Islamâ€.Ghazaliâ€™sSufism spreads and influences the development of Sunni Islam not only in the Arabian peninsula but also in Indonesia and Southeast Asia.
Reproliferation of Islamist Movement in Surakarta: Trajectory and Strategy in The Post Democratization Indonesia
Authors: Duraesa Muhammad Abzar , Ahyar Muzayyin
Published: January 2020

Islamist movement has been proliferating in line with the historical trajectory of Indonesia's political journey; starting from the colonial regime, in the beginning of independence, New Order regime and todayâ€™s Era Reformasi. The process of Democratization and modernization lead the ideology of Islamism to a new phase of religious movement. Along with the growth of democracy in Indonesia, Islamist movement precisely shows its existence intensely in public sphere. The opening canals of freedom in the Reformation Era became a new space for ideology of Islamism to evolve and adapt some strategies to survive amidst the onslaught democratization in Indonesia. This article aims at looking to what extent the proliferation of Islamist movements after the collapse of Soehartoâ€™s authoritarian regime in Indonesia. In this case, Surakarta becomes important to observe because itâ€™s historical context as an embryo in giving birth to earlier Islamist movements, as well as a city famous for the proliferation of ideology of Islamism in Indonesia. Using political sociology approach, this study attempts to understand the path of proliferation of Islamist movements and its various interplayed strategies to the socio-political conditions that occur; either on a global or local scale. This article argues that the development of democracy in Indonesia continues to alter the route map of the Islamist movement. Finally, the results of this study reveal that the proliferation of the current Islamist movement plays a new strategy that appropriated with the development of democracy and technological advancements to gain more public sphere by Indonesian people.
Ibn â€˜Arabi and The Ambiguous Verses of the Quran: Beyond The Letter and Pure Reason
Authors: Arif Syamsuddin
Published: January 2020

This article attempts to clarify this issue and explain Ibn â€˜Arabiâ€™s interpretive method, particularly in dealing with the so-called â€˜ambiguous versesâ€™Â (ayat mutashabihat)of the Holy Quran, on the basis of meticulous reading of several relevant chapters of his kitabÂ al-Futuhat al-Makkiyyah(â€˜Meccan Illuminationsâ€™) and other treatises. The discussion revealsÂ Ibn â€˜Arabiâ€™s approach to Quranic interpretation which rests on the assumption that all the possible meanings that the Arabic language allows for any given word or group of words in the Quran are valid, and that rejection of any one of these meanings would imply limiting Godâ€™s knowledge and inappropriately saying that God was unaware of the various ways in which His Word could be interpreted. In contrast to the theologiansÂ (Mutakallimun)and philosophersÂ (Falasifah), Ibn â€˜Arabi rejects rational interpretationÂ (taâ€™wil â€˜aqli)outright. If reason finds the ambiguous verses of the Quran unacceptable, this only proves its own imperfection and failure to comprehend, not the necessity of interpretation. While he insists that oneâ€™s reading of the Quran must conform to the Arabic language as spoken by its original recipient, Ibn â€˜ArabiÂ more often than not offers surprising and highly original interpretations that seek to unveil the mystical treasures hidden in the text.
Manuskrip Keagamaan di Masjid Popongan: Kajian Kodikologi dan Pemetaan Isi
Authors: Gusmian Islah
Published: January 2020

This article examines religious manuscripts stored in the Popongan mosque, Klaten, Central Java. As a preliminary study, this article describes the physical aspects of the manuscript as well as mapping the topics contained. The approach used is philology and historical perspective that is in it. As a manuscript born in a pesantren community, the Popongan manuscript reflects the struggle of students and scholars in the process of learning and transmission of Islamic scholarship in the late 19th century. Through the Popongan manuscripts we can see the diversity of the fields of study studied by the students and their learning methods. In this case, pesantren has taken an important role in the practice of Islamic learning and at the same time as an important subject in the history of islamization in Indonesia
Ria Ricis and New Platform of Islamic Popular Culture
Authors: Akmaliah Wahyudi
Published: January 2020

Not only change the landscape of popular culture, but the presence of social media also reshapes the structure and the agency. Nowadays, social media can turn ordinary people to celebrities. Using Instagram and YouTube, Ria Ricis has become a piety celebrity who shows her Islamic identity through Islamic performance by wearing the veil in a casual way and earns money from her uploaded videos in social media. Based on a case study of this figure, this paper raises questions related to Islamic popular culture in Indonesia: How does Indonesian define their public sphere currently amid the growth of social media usage? How does Indonesian Muslim respond to social media as a part of digital technology amidst Islamization in the post of an authoritarian regime? What is the possibility of tension for that young Indonesian Muslim as micro-celebrity while facing the three factors related, Islamic identities, enjoyment, and economic benefits? This paper argues that the new media platform has not only affected Indonesian Muslimsâ€™ lifestyles, but also the way in which they negotiate Islamic values, secular life, and economic interest.Â Keywords: Ria Ricis, Social Media, Islamic Popular Culture, and Digital Economy
Competing Identity and Culture: The Formation of Forum Lingkar Pena and Komunitas Matapena in Indonesia
Authors: Ismah Nor
Published: January 2020

This study focusses on the genealogy of the Forum Lingkar Pena and Komunitas Matapena movements, which have produced novel Islam remaja (Islamic youth novels) and novel pop pesantren (pesantren popular novels). Using Bourdieuâ€™s concept of habitus, I analyze the field where Forum Lingkar Pena and Komunitas Matapena discourses are disseminated, particularly among Muslim youth in Indonesia and how Islamic popular culture is represented through these novels and the dynamic of youth Muslimsâ€™ community struggle for meaning in the Indonesian literary field in general. This research found that establishment of FLP and Komunitas Matapena can be described through three main ideas. Firstly, these communities encountered the massiveness of popular culture by offering a medium that supports identity formation for Muslim youth. Secondly, there is a link between the idealism promoted by Muslim organization movements and the establishment of FLP and Komunitas Matapena, and this link determines their forms and cultural products. Thirdly, they use popular culture, such as magazines and popular novels, as media to spread and preserve their idealism, targeting young people.Â Keyword: Islamic youth, FLP, habitus, popular culture, identity
Test with external peripheral vascular occlusion in evaluation of ergoreflex in patients with chronic obstructive pulmonary disease
Authors: Kosyakov Aleksey V. , Abrosimov Vladimir N.
Published: January 2020

Aim. To evaluate changes in the cardiointervalogram (CIG) in the test with external peripheral vascular occlusion in patients with chronic obstructive pulmonary disease (COPD) and in individuals without diseases of the respiratory system.
Materials and Methods. The study included 105 men, of them 64 patients with COPD (age 64.988.67) and 41 volunteers without diseases of the respiratory system (age 61.689.21). The autonomic status was examined and alterations in CIG in the test with occlusion were evaluated on Varicard hardware and software complex (OOO Ramena, Russia).
Results. The obtained data showed the autonomic imbalance with predomination of the activity of sympathetic division of the autonomic nervous system (ANS) in patients with COPD as compared to the control group (p0.05). A study of ergoreflex by analysis of changes in CIG showed reduction of the activity of sympathetic division of the ANS in the test with external peripheral vascular occlusion in individuals without diseases of the respiratory system. In patients with COPD, changes in CIG in the test were less expressed and not always achieved statistically significant level (p0.05).
Conclusions. Differences in the results of the test with external peripheral vascular occlusion in patients with COPD and volunteers without diseases of the respiratory system are attributed to hyperactivation of ergofeflex in patents with COPD.
Possibilities of use of metformin for correction of endothelial dysfunction and adaptation reserves of an organism in patients with metabolic syndrome
Authors: Nizov Aleksej A. , Suchkova Ekaterina I. , Grivenko Aleksej I. , Nikiforova Larisa V.
Published: January 2020

Aim. To study possibilities of pharmaceutical correction of clinical laboratory parameters, of endothelial dysfunction and non-specific adaptation reserves in patients with metabolic syndrome (MS) through use of metformin.
Materials and Methods. The three-month program involved 53 patients with MS rando-mized to two comparable groups. Patients of the control group were kept on individual low-calorie diet and practiced graduated exercises. Patients of the studied group, besides the mentioned program of modification of the lifestyle, took metformin. In all participants, anthropometric and clinical laboratory parameters were twice evaluated, total body composition, condition of vascular endothelium and non-specific adaptation reserves of an organism were analyzed. The extent of endothelial dysfunction was evaluated by the level of endothelin-1 and by parameters of photoplethysmographic examination, non-specific adaptation reserves by the method of analysis of the cardiac rhythm variability.
Results. Metformin in complex with dietary therapy and physical exercises proved to be a safe medical drug for correction of components of MS and of endothelial dysfunction. Use of metformin in patients with MS in combination with dietary therapy and graduated physical exercises as compared to use of the program of modification of the lifestyle alone, leads to reduction in the body mass, waist circumference (in women) and of the total fat mass. Introduction of metformin into the program of complex therapy of patients with MS, provides more evident correction of the parameters of carbohydrate metabolism, reduction of endothelin-1 and stiffness index of the aortic wall, enhancement of parasympathetic regulation, than modification of the lifestyle alone.
Conclusion. Use of metformin in the complex therapy of metabolic syndrome in comparison with the program of modification of the lifestyle, promotes a more significant reduction of the clinical laboratory parameters, of endothelial dysfunction and improves non-specific adaptation reserves of an organism.
Analysis of behavioral risks in adolescents with health limitations and with different anxiety levels
Authors: Voitovich Anna A.
Published: January 2020

Aim. To assess peculiarities of lifestyle of adolescents with health limitations having diffe-rent levels of anxiety.
Materials and Methods. In the research 89 adolescents with health limitations were involved studying at an educational institution of secondary professional education. The leading causes of disability (the main disease) were mental and behavioral disorders. Anxiety levels of the adolescents (State Trait Anxiety Inventory), the extent of nicotine addiction (Fagerstrom test) were studied, social factors, duration of night sleep were assessed, organization of leisure was analyzed.
Results. Low state anxiety (SA, 30 points) was found in 76.2% of the examined adolescents, moderate SA (33-34 points) in 23.8%, 51.4% had a high level of trait anxiety (TA). A moderate negative correlation relationship was established between SA and TA of students (r=0.72, p=0.02). Assessment of the lifestyle of adolescents found the existence of the family disadvantages (each sixth student grew in a social institution); reduction in the night sleep duration (7 hours) in 30.8% of students; low physical activity (only 18.9% of students attended additional physical culture and sports classes). Nicotine addiction was found in more than 90% of students, 61.2% of students used strong drinks at least once in life. A correlation was established between living in a hostel (r=0.56, p=0.031), duration of night sleep (r=0.61, p=0.028), organization of passive rest (r=0.52, p=0.04) and the level of SA.
Conclusion. The conducted research identified the following risk factors for justification of programs for prevention of development of desadaptation: factor of family disadvantages, bad habits, reduced duration of night sleep, low physical activity.
Long-term results of coronary artery bypass graft surgery after stenting of obstructed artery with bare metal stent in patients with acute coronary syndrome and multivessel disease
Authors: Bocharov Aleksandr V.
Published: January 2020

Non-optimal long-term results of endovascular interventions using bare metal stents and their wide use in Russia in acute coronary syndrome (ACS) make it important to study the influence of the mentioned interventions on the results of coronary artery bypass graft surgery (CABG) performed after stenting of the obstructed artery in patients with ACS and multivessel disease.
Aim. To study the results of CABG performed at our department in early periods of ACS after stenting of an obstructed artery with bare metal stents versus the results of use of drug coated stents of the 2nd generation, on the basis of the data of NORSTENT study.
Materials and Methods. The work presents the results of a two-year observation of stepwise treatment of 97 patients with ACS and multivessel disease who were performed stenting of an obstructed artery for life-saving indications followed by CABG not later than in 90 days. Patients of the main group had three-vessel disease of coronary arteries with severity of damage 26.03.2 points on SYNTAX scale. The time from the moment of stenting to complete revascularization was 6417 days. Clinico-demographic parameters of the main group were comparable with those of the comparison group (data of NORSTENT study).
Results. During observation time two cases of acute myocardial infarction occurred. Repeat revascularization was required in 14 patients (14.4%). The rate of MACCE was 0.1443. Odd ratio (OR) of the risk of MACCE occurrence was 1.61 (95% CI [1.14;2.78]).
Conclusion. Surgical revascularization of the coronary bed in early periods after stenting of the obstructed artery with bare metal stents in patients with ACS and multivessel disease has 1.6 times (95% CI 1.14;2.78) higher risk for initiation of adverse cardiovascular events, in comparison with endovascular revascularization with use of drug coated stents of the 2nd generation.
Modern level of rendering palliative and in patient kinds of geriatric assistance by nursing staff
Authors: Chaikina Natalja N.
Published: January 2020

In the world, a share of elderly and old individuals in the total population is constantly growing. This change in the demographic situation in the modern society certainly arouses a justified interest for the medico-social problems of this category of the population. A special role in this problem is assigned to the medium-grade medical personnel, since a statistically average patient ˃60 years of age suffers from a number of different chronic diseases, including cognitive disorders, senile dementia, syndrome of nutrition deficit, serious disorders in the musculo-skeletal system, etc. Salvation of these and other essential problems requires elaboration of complex targeted programs and special training of the nursing staff for work in hospitals, hospices, palliative beds, etc. In the ageing society it is necessary to find appropriate rational forms of organization of medical assistance for aged group of patients and modern ways of interdepartmental interactions that would correspond to the principles of restructure of the healthcare systems. At present in Russia there exist several specialized geriatric and gerontological centers that render different kinds of medical care to the older generation. Integrated character, availability and effectiveness of medico-social assistance for individuals of older age groups is the aim of well-developed geriatric service. Development of such kind of support is also beneficial from the economical point of view in the sense that it permits to reduce duration of repeat stay in hospital, the number of ambulance calls, etc. The mentioned measures will help optimize treatment and diagnosis of age-related diseases and will permit to actualize the term healthy ageing. In the article, the problems of rendering medical assistance for the older age groups of population are considered with accentuation on the increased role of nursing personnel in realization of medical and social help to the elderly population within the three-level system on an example of the Voronezh region.
MEN AND WOMEN IN THE TAGNAWA SYSTEM OF ILOCOS (PHILIPPINES)
Authors: Adajar Esguerra Norma
Published: January 2020

This research delves into a poverty alleviating way of life of the Ilocanoes- the Tagnawa System. This practice is the coming together of men and women around the neighborhood to help one another during times requiring voluminous work, without thinking monetary remuneration in return. It identified the segment of population that had been practicing it and the occasions in their life as a community that have made this system very fructifying. Data gathering was done through interview with senior citizens in the locality, and reinforced through readings and internet blogs.
The tagnawa system was practiced among the Ilocanoes’ of yesteryears: a) on various farming activities, b) on special events like weddings or burials, and c) for house construction, renovation and repair.
Focusing on the interview with senior citizens who experienced these three occasions, the researcher was able to identify and appreciate innate Ilocano values and original Iloko terms which are already seldom used nowadays. This research tries to revive their use for the present generation to ponder upon.
Indeed, Ilocandia is a place where conscientious people once lived. Let it be forever!
Career Guidance Services in Public Senior Secondary Schools in Kano, Nigeria
Authors: Abubakar Isa Ado
Published: January 2020

The study examines career guidance services provided by school counsellors in secondary schools in Kano state. The study used 387 sample respondents drawn through purposive sampling from randomly selected schools.  Questionnaire instrument with satisfactory psychometric properties was employed in data collection process. The results show that school counsellors assist students to identify their strength, abilities and learning style, help students to make appropriate career pathway selection, set educational and career goals, search for information about careers and work choices.  However, school counsellors underperform in helping students to make future educational planning, college selection and placement. Moreover, no significant difference was found among gender excepts in educational Planning, college selection and placement with female students having better educational planning, college selection and placement. It is concluded that the school counsellors play greatly in the area of career decision making, goal setting and personal awareness. However, it is recommended that school counsellors should improve services involving future educational planning, college selection and placement.
Identifying Factors Affecting Acceptance of Virtual Reality in Classrooms Based on Technology Acceptance Model (TAM)
Authors: Abd Majid Faizah , Mohd Shamsudin Nurshamshida
Published: January 2020

Technology Acceptance Model (TAM) has received great recognition through the various research conducted on determining users’ acceptance of relevant technology innovation. Past researches have focused on technology innovation in education such as e-learning, Learning Management Systems and online applications. The 21st century teaching and learning framework has identified the relevance of the Internet of Things (IoT) and online applications as part of the teaching and learning process. Besides e-learning, MOOCs, Virtual and Augmented Reality have also found their place in the emerging teaching and learning platforms. As Virtual Reality only became popularized in classrooms in the recent years, not much is known about users’ acceptance of this technology innovation in the classroom. This paper, which is based on the TAM, attempted to identify the factors that could affect the respondents’ acceptance of Virtual Reality (VR) in classrooms. Factors on the perceived ease of use (PEoU) and perceived usefulness (PU) affecting the respondents’ attitude and intention to use VR in their classrooms were studied. Employing a quantitative research design, a set of questionnaire based on constructs adapted by Davis (1989) and adapted from past researches (Ngai et al, 2005; Weng et al, 2018, Muhamad Sufi, 2019) was distributed to a group of in-service teachers who were pursuing their postgraduate studies in one of the faculties in Universiti Teknologi MARA. The data was analyzed using SPSS in determining the relationships between the independent variables and the dependent variables. The analysis has further confirmed past research findings. However, in the context of VR, some suggestions to improve current practice are suggested. Policymakers and decision-makers could be enlightened by the present study’s findings. Likewise, teachers may find VR a more convincing platform to be integrated in their classrooms.
Detailed Model of a Common Rail Injector
Authors: Vass Sándor , Zöldy Máté
Published: January 2020

This work is about the validation of a Common Rail (CR) injector model. The model describes injector internal behavior in a detailed way, validation is done using dosage measurements and needle lift traces.

The model contains fluid dynamic, mechanic and electro-magnetic parts describing all important internal processes. To compare the modelling results against measurement data, three test cases were chosen on a medium duty test engine to represent a wide range of operation points. Dosage measurements were done by averaging the injected mass of 1500 injections, each measurement repeated three times. Needle displacement was measured using an injector equipped with a needle lift sensor in the same operating points. The results of the simulated injector and the measured values showed good conformity both in needle displacement and injected fuel mass, so the model can be a basis for further injector and combustion analyses.
The Effect of the Electrode Position on the Dynamic Behavior of an Electrostatically Actuated Microcantilever
Authors: Eshag Mohamed Ahmed , Zarog Musaab
Published: January 2020

Electrostatic actuators have major role in many MEMS devices, e.g. sensors, actuators. The amount of applied voltage to an electrostatic micro-actuator has a direct impact on the amplitude of deflection throughout the cantilever. This research aims to study the effect of the electrode length and the applied voltage on the amplitude of deflection of the micro-cantilever. Also, the resonant frequency for the cantilever was computed for full length and compared with simulation results. Finite element method, ANSYS was used as a simulation tool.
A Liquid Metal Flow Between Two Coaxial Cylinders System
Authors: Merah Abdelkrim , Kelaiaia Ridha , Mokhtari Faiza
Published: January 2020

The Taylor-Couette flow between two rotating coaxial cylinders remains an ideal tool for understanding the mechanism of the transition from laminar to turbulent regime in rotating flow for the scientific community. We present for different Taylor numbers a set of three-dimensional numerical investigations of the stability and transition from Couette flow to Taylor vortex regime of a viscous incompressible fluid (liquid sodium) between two concentric cylinders with the inner one rotating and the outer one at rest. We seek the onset of the first instability and we compare the obtained results for different velocity rates. We calculate the corresponding Taylor number in order to show its effect on flow patterns and pressure field.
Numerical Study of Fluid Flow Through a Confined Porous Square Cylinder
Authors: Guerbaai Salah , Touiker Mouna , Meftah Kamel , Omara Abdeslam
Published: January 2020

A numerical study is performed to analyze steady state forced convection fluid flow through a confined porous square cylinder. The Darcy-Brinkman-Forchheimer model is adopted for the porous region. The finite volume method and the iterative SIMPLE algorithm are used to solve the governing equations. The results obtained are presented for the streamlines, variation of Nusselt number and drag coefficient for the range of conditions as 5 ≤ Re ≤ 40 and 10−2 ≤ Da ≤ 10−6.
Feminization of Higher Education in Poland in 1918-2018
Authors: Popiński Krzysztof
Published: January 2020

The text is devoted to women’s presence in the Polish higher education in 1918-2018. Its history is presented in chronological-thematic order, including information about the beginnings of women’s studies at universities as well as their basic political, economic and cultural conditioning. Although during the discussed period, basis of political system in Poland changed three times, there was a constant development of the size of higher education, as well as an increase of women’s participation among students and academic faculty. The beginnings were very modest. However, today women constitute already the majority of students of higher education and almost a half of academic employees. Women, during their fight for equality in access to studies and academic career, had to overcome many legal obstacles, also informal ones, resulting from vitality of the image of traditional social role of women. Even though, the formal equality was gradually earned, it is still more difficult for women than for men to undertake studies at some faculties, and to get higher degrees and academic positions as fast as men.
Analisis Iklim Mikro di Greenhouse dengan Atap Tipe Arch untuk Budidaya Bunga Krisan Potong
Authors: Setiyo Yohanes , Sumiyati S , Yuliasih Ni Putu
Published: January 2020

Petani di Desa Candikuning membangun greenhouse untuk budidaya bunga krisan potong tanpa melakukan perhitungan teknis. Greenhouse tersebut dibangun berdasarkan pada ketersediaan bahan baku lokal, biaya tersedia dan topografi wilayah. Analisis iklim mikro pada greenhouse dengan atap tipe arch untuk optimasi kecepatan pertumbuhan dan kualitas bunga krisan yang dihasilkan menjadi obyek penelitian. Data-data yang dikumpulkan adalah: data iklim mikro (suhu, kelembaban, dan intensitas cahaya), data pertumbuhan tanaman krisan (tinggi tanaman)  dan data kualitas bunga (jumlah dan diameter bunga). Hasil penelitian terhadap intensitas cahaya  rata-rata di greenhouse dengan tinggi atap 2,5 m, 3,0 m dan 3,5 m masing-masing adalah : 27.6 ± 5.5 k.lux, 27,5 ± 4,3 k.lux dan 29.5 ± 2,5 k.lux dengan suhu rata-rata adalah 21,1 ±0,2 oC, 27,5 ±0,17 oC dan 21,2 ±0,3 oC. Intensitas cahaya yang memasuki ruangan greenhouse sebesar 20 – 30 % dari intensitas cahaya yang mengenai atap bangunan. Kelembaban udara di ruang greenhouse tersebut masing-masing adalah 73,3 ± 0,5%, 77,5 ± 0,4 %, dan 86,3 ± 0,7 %. Hal ini menunjukkan bahwa jumlah energi radiasi matahari yang diterima atap dan dinding greenhouse untuk menaikkan suhu ruangan dan intensitas cahaya dari greenhouse secara efektif untuk mendukung proses fotosintesis, sehingga tanaman berbunga pada ketinggian 70-80 cm dengan bunga pertama berdiameter rata-rata 7,5 ± 0,6 cm.

 

Farmers in Candikuning Village built a greenhouse for chrysanthemum cut flowers cultivation without performing technical calculations. The greenhouse was built based on the availability of local raw materials, available costs, and regional topography. Micro-climate analysis on roof-type greenhouse with arch type to optimize the growth speed and quality of the chrysanthemum produced is the object of research. The data collected are microclimate data (temperature, humidity, and light intensity), data on the growth of chrysanthemum plants (plant height) and flower quality data (number and diameter of flowers). The results of the study on the average light intensity in greenhouses with roof height of 2.5 m, 3.0 m and 3.5 m respectively are: 27.6 ± 5.5 k.lux, 27.5 ± 4.3 k.lux and 29.5 ± 2.5 k.lux with an average temperature of 21.1 ± 0.2 oC, 27.5 ± 0.17 oC and 21.2 ± 0.3 oC. The intensity of the light entering the greenhouse room is 20-30% of the intensity of light that affects the roof of the building. The air humidity in the greenhouse space is 73.3 ± 0.5%, 77.5 ± 0.4%, and 86.3 ± 0.7%, respectively. This shows that the amount of solar radiation energy received by the roof and walls of the greenhouse to increase the room temperature and light intensity from the greenhouse effectively to support photosynthesis so that the plants flower at an altitude of 70-80 cm with the first flower with an average diameter of 7.5 ± 0.6 cm
ДЕТЕКЦИЈА КАВИТАЦИЈСКИХ РЕЖИМА У ЦЕНТРИФУГАЛНИМ ПУМПАМА ПРИМЈЕНОМ ВИБРОДИЈАГНОСТИЧКИХ МЕТОДА
Authors: Вучинић Радивојка
Published: January 2020

У оквиру рада приказан је поступак експерименталног испитивања појаве кавитације на примјеру центрифугалне пумпе у пумпној станици „Лиман“ у Новом Саду. Током експеримента паралелно су мјерени хидраулички радни параметри пумпе и вибрације на одабраним тачкама на кућишту пумпе. Објашњени су појмови кавитације и вибродијагностике и приказани су поступак и резултати испитивања, као и анализа резултата.
AUTOMATSKA DETEKCIJA STAVKI MENIJA UNUTAR TEKSTOVA RECENZIJA RESTORANA
Authors: Trpovski Igor
Published: January 2020

Cilj ovog istraživanja jeste prezentova­nje jednog pristupa za detekciju stavki menija unutar tekstova recenzija restorana. Nekoliko modela mašinskog i dubokog učenja istrenirano je da detektuje pominjanja hrane unutar recenzija restorana. Nakon toga, nekoliko algoritama poklapanja stringova primenjeno je kako bi se pominjanja hrane uparila sa odgovarajućim stavkama menija. Podaci su prikupljeni sa sajta Donesi.com i ručno anotirani. Svi upotrebljeni modeli i algoritmi su evaluirani.
ЕЛЕКТРОМАГНЕТНА КОМПАТИБИЛНОСТ ПРЕТВАРАЧА ЕНЕРГЕТСКЕ ЕЛЕКТРОНИКЕ У ИНДУСТРИЈИ
Authors: Мамлић Горан , Васић Веран , Орос Ђура
Published: January 2020

У овом раду приказани су неки аспекти везани за електромагнетnу компатибилност претварача енергетске електронике у индустрији. Стављен је аспекат на утицај електромагнетних сметњи, рад фреквентних претварача, генерисање електромагнетних сметњи од стране фреквентних претварача, примену електромагнетске компатибилности у пракси.
ANALIZA ALGORITAMA ZA VEKTORSKU REPREZENTACIJU TEKSTA
Authors: Stanković Milan
Published: January 2020

Obrada teksta odnosno NLP (Natural Language Processing) predstavlja atraktivnu oblast u oblasti računarske inteligencije. U ovom radu će biti predstavljeno više načina za pretvaranje teksta u vektore. Postoje dve velike kategorije, prva se zasniva na statističkim metodama a druga na korišćenju neuronskih mreža. Prednost vektorske predstave je mogućnost da se takvi vektori porede ili dalje lakše koriste u nekoj od metoda mašinskog učenja. Vektorska reprezentacija održava deo semantike, tako da predstavlja pogodnu metodu za reprezentaciju i poređenje kompleksnijeg teksta.
OSNOVI CLOUD TEHNOLOGIJE SA PRIMERIMA PRIMENE
Authors: Kotur Daniela , Trpovski Željen
Published: January 2020

U ovom radu prezentovana je osnovna ideja cloud computing tehnologije, ključne karakteristike, modeli, kao i problem sigurnosti. Od mnogobrojnih  rješenja koja cloud nudi izdvaja se disaster recovery funkcionalnost koja je detaljno objašnjena. U okviru ra­da, predstavljena je i realizacija i izvršeno tesiranje i analiza date funkcionalnosti.
ПРИМЕНА ДУБОКОГ УЧЕЊА УСЛОВЉАВАЊЕМ НА САМОВОЗЕЋИ АУТОМОБИЛ У СИМУЛИРАНОМ ОКРУЖЕЊУ TORCS
Authors: Марјановић Ђорђе
Published: January 2020

У овом раду описан је систем у којем се дубоко учење условљавањем примењује на аутономно возилоу симулираном окружењу. Агент је трениран помоћу Deep deterministic policy gradient (DDPG) алгоритма, а окружење представља 3D тркачка видео иград TORCS. Након више од 200 епизода обучавања агент је успео да заврши цео круг без скретања ван стазе. DDPG алгоритам се показао веома успешно у окружењима са континуалним акцијама.
High Accuracy Leak Detection Performed on Entire Live Wellbore in Real Time Using Fiber-Optic Diagnostic-Capable Coiled Tubing
Authors: McCarthy Caitlin , Williams Troy , Butz Stephen
Published: January 2020

Using fiber-optic coiled tubing (CT) to perform distributive temperature sensing (DTS) and distributed acoustic sensing (DAS) logging to identify multiple points of leak detection is discussed using a case study. The case study provides an in-depth review of the operation performed on a land-based horizontal well where a single well intervention run successfully logged the entire wellbore, resulting in the identification of multiple depths where casing had failed during an initial hydraulic fracture stimulation attempt. Additionally, a brief review of fiber-optic logging techniques and equipment is described.
Solving Overburden Anomalies with Depth Imaging in Conjunction with Customized De-Multiple Flow in a Carbonate Field Offshore Abu Dhabi
Authors: Xu Zuo , Mills Keith , Cooper Sharon , Cordery Mike , Shimoju Ryo , Kleef Franciscus Van , Waqas Muhammad
Published: January 2020

The seismic imaging of carbonate fields offshore Abu Dhabi is complicated by shallow overburden anomalies (e.g. channels, sink holes, karst features, etc.), strong anisotropy and complex multiple generation mechanisms. Noisy data and converted wave energy create further difficulties. All of these pose challenges for conventional time imaging (PreSTM), resulting in structural uncertainty and unreliable reservoir characterization.

Successful imaging requires an accurate velocity model. This is important in the shallow overburden area where inaccurately modelled localized anomalies will amplify errors to deeper targets as waves pass through them, creating artificial pull-ups and push-downs.

Seismic anisotropy has a key role in accurate subsurface imaging. In this region, anisotropy is complicated, with values ranging from negative delta to large positive epsilon. Inaccurately estimated anisotropy will result in over compensated velocities, and may cause cycle-skipping in diving-wave Full Waveform Inversion (FWI).

Shallow water topography and strong impedance contrasts in the area lead to a substantial amount of free-surface and inter-bed multiples. The repetitiveness of the flat mega-scale geology makes it difficult to distinguish and attenuate multiples from primaries.

In this paper, we demonstrate that extensive pre-stack depth migration (PreSDM) technologies including Dip Constraint Tomography (DCT), Structural Constraint Tomography (SCT), Vertical Seismic Profile (VSP) constraint anisotropy update and a well-designed de-multiple flow can successfully resolve the challenges mentioned above.
Maximizing Crude Yield of Surface Production Facilities/GOSPs by Process Optimization
Authors: Al-Zahrani Talal , Soliman Mohamed Ahmed , Salu Shamusideen , Ansari Nisar , Al-Shuhail Khalaf , Al-Otaibi Majed
Published: January 2020

This paper highlights several opportunities to maximize the total crude oil yield of typical Gas Oil Separation Plants (GOSP's), gas handling and crude oil stabilization systems. This can be achieved for existing facilities by optimizing operating parameters without capital cost or plant modification. Maximizing GOSP's yield (oil recovery) has many advantages such as revenue generation, reducing energy requirements of associated gas handling, mitigating export gas transportation challenges as well as reducing capital cost for new facilities.

Throughout three case studies, this paper demonstrates the impact of operating parameters change in reducing GOSP's total oil shrinkage:

Case Study-1: Pressure let-down optimization of multistage separation

Case Study-2: Temperature optimization of compressors after-coolers

Case Study-3: Temperature optimization of crude stabilization

The analysis was performed for each case study utilizing HYSYS process simulation to establish the optimum operating window for the subject process area. The theoretical results were advanced by conducted field trials under governing operating procedures to validate the conclusion and further explore the benefits as well as the potential challenges of these opportunities.

In case study 1, for high GOR GOSP where more than 3 stages of pressure letdown are required, pressure optimization of the intermediate and low pressure gas/oil separation stages achieved an oil output increase of 3.5 MBD for the same base rate (500 MBD) with dropping gas compression power requirement by 10 MW.

In case study 2, for GOSP's where steady-state hydrocarbon condensate recovered from compressors after coolers knock-out drums is spiked into main Light crude production, optimizing air coolers operating conditions result in a gain of up to 2 MBD in export oil for the same base rate (200 MBD). Moreover, 50% drop in export gas water load can be achieved which helps mitigating pipeline corrosion challenges in gas transportation given the unavailability of a gas dehydration system in the facility.

In case study 3, optimizing inlet temperature of light crude stabilizer enhanced column stripping capability and enabled meeting the required H2S and vapor pressure specification with minimum hydrocarbon liquids losses. A Reduction of 20 °F in inlet temperature resulted in savings of up to 2 MBD stock tank crude for the same base rate of 500 MBD in the expense of reboiler's duty.