bluuebunny/crossref_metadata_2025_split huggingface dataset:
Developing physics problem-solving skill test for grade X students of senior high school
Authors: Nadapdap Amipa Tri Yanti , Istiyono Edi 
Published: March 2018

This research aimed to develop a physics problem-solving skill (PSS) test for grade X students of senior high school which met test instrument characteristics and feasibility. The development stages included: (a) test designing, (b) test trial, and (c) test revision and preparation. The designing stage included: (1) needs analysis, (2) mapping, (3) drawing conclusion, (4) determining test purpose, (5) determining competencies, (6) determining materials, (7) preparing answers, (8) writing items, (9) validating content, (10) improving and preparing the test, and (11) preparing the scoring guide with PCM. The trial stage consisted of: (1) determining trial subjects, (2) performing trial, and (3) analyzing trial result data based on IRT. The study was performed in Kulonprogo involving 281 students. The result shows that the instrument fulfills content validity with Aiken’s V of 0.95 to 0.98. Based on INFIT MNSQ criteria, 52 items fit PCM, item difficulty index ranges from -1.47 to 0.88, meaning that all items are good, and information function analysis and SEM show that the test fits the ability between -1.3 and 2.7. Therefore, the test instrument meets the characteristics and feasibility to measure physics PSS in high school.
Tracking Myself: African American High School Students Talk About the Effects of Curricular Differentiation
Authors: Stanley Darrius , Venzant Chambers Terah T. 
Published: March 2018

Research on the merit of school tracking policies has long been at the center of heated educational debate. Unfortunately, while the trend in studies looking at tracking in schools has continued, the student perspective has been underutilized in much of this previous research. Recently, however, there has been a surge in research that focuses on the benefits of student-centered research This research recognizes the legitimacy of student perspectives in reform efforts. This paper focuses on the student perspectives in a qualitative project with seven black students to understand the insights and contributions they have for school leaders. Findings revealed that students can contribute nuanced perspectives on complex educational reform issues, such as tracking, and provide powerful insights that should be considered in school reform conversations.
Influence of Surface Treatment on Composite Adhesion in Noncarious Cervical Lesions: Systematic Review and Meta-analysis
Authors: Rocha AC , Da Rosa WLO , Cocco AR , Da Silva AF , Piva E , Lund R-G 
Published: March 2018

SUMMARY
The purpose of this study was to analyze the influence of dentin surface treatments on the retention rate of resin composite restorations in non-carious cervical lesions (NCCLs). Seven randomized clinical trials were included in this review. Data regarding retention rate, type of surface treatment, and the main characteristics of studies were analyzed. Two reviewers performed a literature search up to December 2016 in eight databases: PubMed (Medline), Lilacs, Ibecs, Web of Science, BBO, Scopus, Scielo and The Cochrane Library. Only clinical trials evaluating dentin surface treatments in resin composite restoration in NCCLs were included. Noncontrolled clinical trials, reviews, editorial letters, case reports, case series and studies published in a language other than English, Portuguese, or Spanish were not included. The included studies evaluated different surface treatments, such as using an adhesive system with a frictional technique, drying the dentin, and removing sclerotic dentin by using a bur and applying EDTA before primer use. The analysis considering the mechanical removal of dentin surface with a bur and the application of an adhesive system in a frictional mode showed these treatments improved retention rates of the resin composite restorations in NCCLs (p&lt;0.05). There is evidence in the literature suggesting that the mechanical removal of dentin surface with a bur and the application of an adhesive system in a frictional mode could improve the retention rates of resin composite restorations in NCCLs. However, the studies showed high heterogeneity, and additional clinical trials are needed to determine the best dentin treatment option in NCCLs.
Efficacy of Modern Light Curing Units in Polymerizing Peripheral Zones in Simulated Large Bulk-fill Resin-composite Fillings
Authors: Ilie N , Luca BI 
Published: March 2018

SUMMARY
The variation in micro-hardness (HV) within simulated large cavities (10 × 6 mm) filled in one increment with three bulk-fill resin-based composites (BF-RBC) was assessed by means of a universal hardness device. Modern blue and violet-blue light curing units (LCUs) were applied in three different positions, by rotating the LCU in 120° steps. The exposure distance was 3 mm. One center and two peripheral (4-mm apart from the center) HV line profiles were measured in 0.5-mm steps at 24 hours postpolymerization to calculate the depth of cure (DOC). Incident light, irradiance, and spectral distribution were recorded. A multivariate analysis (general linear model) assessed the effect of the varied parameters as well as their interaction terms on HV and DOC. The effect of LCU rotation was not significant (p=0.109). The DOC varied between 3.46 mm and 5.50 mm and was more strongly influenced by the BF-RBC (p&lt;0.001, ηP2=0.774), followed by the width of specimen (p&lt;0.001, ηP2=0.554), while the influence of the LCU was very low (p&lt;0.06, ηP2=0.070). Whether a BF-RBC filling is cured as well in the periphery as in the center depends more on the material than on the curing unit used.
Efektivitas Model Pembelajaran ARIAS ditinjau dari Sikap Ilmiah: Dampak terhadap Pemahaman Konsep Fluida Statis
Authors: Saregar Antomi , Marlina Anis , Kholid Idham 
Published: March 2018

Peneliti melaporkan hasil penelitian terkait efektivitas penggunaan model pembelajaran dalam memudahkan memahami konsep materi fisika. Model pembelajaran yang digunakan adalah model pembelajaran ARIAS, ditinjau dari sikap ilmiah siswa. Metode penelitian yang digunakan adalah Quasi Eksperiment. Post-test only control group design dengan teknik purposive sampling. Teknik pengumpulan data menggunakan metode tes untuk mendapatkan data pemahaman konsep, sedangkan metode angket untuk mendapatkan informasi sikap ilmiah. Uji hipotesis penelitian menggunakan anava dua jalan. Simpulan dari hasil penelitian ini adalah: (1). Model pembelajaran ARIAS lebih efektif daripada model pembelajaran konvensional terhadap pemahaman konsep fisika siswa; (2). Sikap ilmiah siswa berpengaruh terhadap pemahaman konsep fisika siswa; (3). Tidak terdapat interaksi antara penerapan model pembelajaran ARIAS dan konvensional, ditinjau dari sikap ilmiah terhadap pemahaman konsep fisika siswa.The Effectiveness of The Arias Learning Model In Terms of Scientific Attitudes: The Impact on Understanding The Concept of Static FluidsThe researcher reports the research result toward of how students understand on physics learning concept material efficiently. A research method that used is Quasi-experiment, by using post-test only control group design with purposive sampling technique. Data collecting technique uses test method to achieve data concept understanding, meanwhile, questionnaire method to achieve scientific character information. Hypothesis testing of the research uses two ways analysis of variance. The conclusion of the research are; (1). ARIAS learning model is more efficient than conventional learning model toward students understanding on physics concept; (2). The scientific attitude of students influencing on students physics concept understanding; (3). There is no interaction between ARIAS learning model application and conventional learning model, as seen on students scientific attitude toward physics concept understanding.
Factor Influence Analysis of Corporate Value with Firm Size As Moderator Variable in Indonesia Stock Exchange
Authors: Suteja Jaja , Abas Muhammad Rida 
Published: March 2018

Corporate value is the representation of people’s judgement towards the company’s performance in general that usually correlated with stock price. Maximizing corporate value is the main goal of a company. By doing so, it will also improve the prosperity of shareholders. This present study aims to analyze the influence of capital structure, dividend policy, and profitability towards the corporate value by involving firm size as the moderator variable. The subjects are the companies of consumer goods industry sector that has been registered in Indonesia Stock Exchange from 201 until 2016. The result showed that capital structure, dividend policy, and profitability simultaneously have influence towards the corporate value with coefficient of determination (R2) 20.17%. Thus, moderately, firm size can negatively moderate the correlation between capital structures towards corporate value. However, it cannot moderate the correlation between ldividend policies towards the corporate value. Keywords: Corporate Value, Capital Structure, Dividend Policy, Profitability, Firm Size
Valuation approaches to ecosystem goods and services for the National Botanical Garden, Bangladesh
Authors: Tahzeeda Jasia , Khan Mizan R. , Bashar Raisa 
Published: March 2018

Abstract
The main attractions of national parks include their scenic beauty, security, wildlife and trees. For preserving and maintaining national parks, an appropriate pricing policy can be used. The current study focuses on using the travel cost method (TCM) and contingent valuation method (CVM) as a non-market valuation technique to value the National Botanical Garden in Bangladesh, a developing country where little or no previous works of this kind has been conducted before. The main objective of the paper was to suggest an appropriate entrance fee for the park by assessing the willingness to pay (WTP) from the TCM and CVM; by determining a revenue maximizing entrance fee from the CVM; and by considering socio-demographics, the characteristics of visits and the motivation of the visitors to preserve the National Botanical Garden. The study sampled 100 visitors. These visitors participated in a survey which consisted of closed questions followed by a semi structured in-depth interview. For data processing, SPSS and Microsoft Excel were used. Based on the travel cost demand function using the TCM, the study found that the amount respondents were willing to pay for entrance was 0.955 US dollars and yearly consumer surplus was 593634.5 USD. From the CVM, it was estimated that the WTP was 0.225 USD for the entrance and revenue maximizing entrance fee was 0.376 USD. Finally, the entrance fee suggested for National Botanical Garden was around 0.225 USD.
Changes in river channel pattern as a result of the construction, operation and decommissioning of watermills – the case of the middle reach of the River Liswarta near Krzepice, Poland
Authors: Fajer Maria 
Published: March 2018

Abstract
Changes in river channel pattern in the middle reach of the River Liswarta and in the lower reaches of its tributaries near Krzepice were analysed, and were related to the construction, operation and decommissioning of watermills. For this purpose, old maps which covered the period from the beginning of the 18th century until the 20th century were used alongside written historical sources. Maps from the first half of the 19th century provided valuable source material. Traces of old mill water systems in the valley floor were analysed on the basis of a numerical terrain model and aerial photographs as well as on the basis of detailed geomorphological mapping. The research made it possible to determine the locations of former mills mentioned in written historical sources and also changes in the course of river channels related to mill construction. It was found that some reaches of the River Liswarta channel and the estuary reach of its tributary River Bieszcza were in fact old mill races. These mill races account for around 31% of the length of the river channel reaches analysed. Analysis of old maps indicated that in the 19th century, the River Liswarta near Krzepice had multiple channels. This development of the River Liswarta channel was not only the result of natural geological, geomorphological and climate conditions, but also the product of watermill construction, since some channels within this network were artificial canals, including mill races. As a result of the construction of mill races, river channel reaches ranging from 1 to 2.5 km in length were shifted. Of the mills studied, as many as 80% ceased to exist in different parts of the period covered by the research. Traces of some of them can still be found in the form of ruins of foundations or of a water system with the remains of hydraulic structures, while some have only left their mark on the river channel pattern.
The suburbanisation process in a depopulation context in the Katowice conurbation, Poland
Authors: Spórna Tomasz 
Published: March 2018

Abstract
The Katowice conurbation is an example of a typical old industrial region in Central and Eastern Europe, whose socioeconomic transformation, initiated after 1990, has led to spatial and functional changes. The aim of this article is to present the suburbanisation process in the Katowice conurbation based on demographic changes and an analysis of migration flow. This process has been taking place in the area since the 2000s and takes on the shape of a multi-centre development of newly created individual and developed housing zones (both in the core and in the suburban area of the conurbation). Since 1990, the cities of the Katowice conurbation have been undergoing a process of shrinking. This process is manifested in the decline in number of urban residents in the years 1991–2016, amounting to 366 thousand people. Moreover, the cities face numerous social, economic and spatial problems. Since 1995, simultaneous with the shrinking of the cities of the Katowice conurbation, there has been an increase in the number of inhabitants in its suburban areas (since 2004, the trend has continued to be positive). Population increases have also been recorded in some inner-city zones of the conurbation. The suburbanisation process in the outer zone of the conurbation includes, in particular, the communes located north and south of the cities constituting its core, including the communes of Ożarowice, Psary, Mierzęcice in the north and Mikołów, Orzesze, Wyry in the south-west. On the other hand, the areas of intense inner-city construction development, located in the areas of the Katowice conurbation core, which are attractive in terms of environment and transportation, are undergoing so-called, “internal suburbanisation”.
Counter-Insurgency Operations of the African Union and Mitigation of Humanitarian Crisis in Somalia
Authors: Ononogbu Olihe Adaeze , Nwangwu Chikodiri 
Published: March 2018

AbstractThe protracted armed conflict in Somalia has engendered an unprecedented humanitarian crisis; one that makes it a leading storehouse of the worst humanitarian conditions in the world. The intervention of the African Union (AU) through its third Peace Support Operation- the African Union Mission in Somalia (AMISOM)- was aimed at supporting the Transitional Federal Institutions in the stabilisation of the country, advancing dialogue and reconciliation as well as facilitating the provision of humanitarian support. The achievement of the humanitarian component of the mission’s mandate is largely contingent on the first two mandates. Essentially, this study interrogated the interface between the implementation of the humanitarian component of AMISOM mandate and the control of the worsening conditions of Somali internally displaced persons and refugees. Anchoring analysis within the classical approach to national security, the study found that the restoration of relative stability in the polity has not widened access to economic and humanitarian assistance in the terror-laden state of Somalia. Thus, greater commitment of major stakeholders, especially the United Nations (UN), the United States as well as the AU is required in the transmutation of AMISOM and Somalia National Armed Forces into a force that is entirely indigenous to the people of Somalia. This will serve as an elixir to the ever-constricting humanitarian corridor that has exacerbated the conditions of the victims of forced migration in Somalia.
Organizational Justice and Turnover Intention among Medical and Non-Medical Workers in University Teaching Hospitals
Authors: Timinepere Court Ogele , Agbaeze Emmanuel K. , Ogbo Ann , Uche Nwadukwe C. 
Published: March 2018

AbstractThe purpose of this paper is to establish the difference in organizational justice perceptions and effects organizational justice dimensions on turnover intentions of workers in university teaching hospitals. The study adopted analytic descriptive survey design with quantitative methodology. Data were collected from university teaching hospitals in Nigeria through distribution and retrieval of 503 copies of questionnaire which was designed on a 5- point Likert scale response continuum of strongly agree to strongly disagree with corresponding weights from 5 to 1. Data were analysed with one way analysis of variance, Duncan post hoc test and multiple regression analysis. The findings of this study demonstrated that there was a significant difference in organizational justice perception among junior, senior and management staff in teaching hospitals; there was a significant difference in organizational justice perception among medical doctors, paramedics and supporting staff in teaching hospitals; distributive justice had non-significant positive effect on turnover intention among others. There is dearth of empirical literature in organizational justice and turnover intent in teaching hospitals in the Nigerian context. This research paper bridged the knowledge gaps, demonstrated policy inadequacies in the health sector and proffered possible way forward to mitigate the incidence of industrial unrest.
An Analysis of the Social Factors that Resulted in the 2011 Social Unrest in Egypt, Integrated with a Personality Profiler of its Revolutionary Leadership
Authors: Karkazis John , Baltos Georgios C. , Balodis Janis 
Published: March 2018

AbstractAt the beginning of 2011, the majority of Egyptian citizens ended the thirty-year authoritarian regime of President Mubarak. From the full of celebrations day of 25th January Revolution till the beginning of July 2013 a lot of political drama overflowed the turbulent Egyptian society, leading to the overthrow of the first legitimately elected President M. Morsi. General Al-Sisi took over the presidential duties in 2014, and the whole world is still struggling to determine whose actions favor and which undermine the democracy and/or the interests of Egyptian people. In an effort to research the social factors that prepared and resulted in the political activism and unrest in Egypt over these latest years, this study has been developed on two main axes. The first one applies an analytical model focusing on the critical drivers towards social unrest, especially adjusted for the data referring to Eastern Mediterranean and Middle Eastern societal characteristics. The second axis then takes advantage of the model’s assessments and proceeds with the narrative interpretation of the facts through a personality profiler for M. Morsi. In this way the research questions meet answers, conclusions and policy implications that combine, in terms of political psychology, both personality-based approaches to politics as well as structural and institutional role constraints restricting the range of initiatives available for leadership decision making.
Migration of Relational Databases to NoSQL - Methods of Analysis
Authors: Oliveira Fábio , Oliveira Abílio , Alturas Bráulio 
Published: March 2018

AbstractThe amount of data to store, organize and manage in any organization, is very high and increases every day, fact well-known by companies as Facebook, Google or SAS. With this current growth rate, technologies must adapt to the amount of disposable data, and a new approach to information processing is required. Big Data technologies are more focused, and this is a reason for a greater spread of NoSQL database models. The purpose of this article is to validate the existing (and already used) migration methods and to adapt them, to understand the most efficient method to migrate a relational database to a NoSQL database. We will show the methodology used and what were the steps followed for the implementation, as well as the configuration of the environment used during the tests. Results show that in this migration process, the most efficient method is what is referred to as automatic offline migration. However, it requires a window of unavailability greater than the method of online migration, which in turn requires more resources from the operating system to migrate. Therefore, the most efficient method to migrate a database will depend on the application availability, and the computational resources available for it. We hope to make an important contribution in helping to choose a migration method to use, and the metrics that can be collected to better evaluate the performance of a migration.
STUDI ANALISIS KUALITAS AIR DI DAERAH ALIRAN SUNGAI PAKERISAN PROVINSI BALI
Authors: Asrini Ketut , Sandi Adnyana I Wayan , Rai I Nyoman 
Published: March 2018

Pakerisan watershed is used by the people for various purposes to meet the daily needs for water and it is also for irrigation water. The aim of research was to determine the water quality related to human activities and the pollution index. Water sampling was conducted in the nine sample points i.e. upstream of two sample points, in the middle of four sample points, and in the downstream of three sample points. Sampling was done by purposive sampling. Determination of water quality was carried out by comparing the measured data of each parameter of water with the value of quality standards based on the Bali Governor Regulation Number 08 of 2007, while the definition of the status of water quality was done by the pollution index method. The results showed that the activities that affect the water quality physically, chemically and biologically at the upstream to downstream are farming activities, settlements, tourism and trade. In the upstream showed no parameters that exceeded the quality standards, the variables of BOD, COD, phosphate, fecal coli and total coli exceeded the quality standards and in the downstream, the BOD, fosfat and fecal coli exceeded the quality standards. The pollution index found in the upstream region good condition, whereas in the middle was classified as heavily polluted until the downstream was lightly polluted.