bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH INDIKATOR UTAMA PERBANKAN TERHADAP PANGSA PASAR PERBANKAN SYARIAH
Authors: Purboastuti Nurani , Anwar Nurul , Suryahani Irma
Published: September 2015

This study is about syariah banking. The secondary data, obtained from the published reports of Bank Indonesia (BI) was used. It consists of Islamic Banking Statistics (SPS) and the Progress Report on Islamic Banking (LPPS). The analytical methods used were multiple linear regression, F test and t test. Based on the calculation of F test, deposit indicators - ROA, NPF, FDR, and the ratio jointly influence the market share of Islamic banking in Indonesia.  Further, based on t test that had been done,  the variable deposits, ROA, NPF and the ratio have a significant effect, while the FDR variables have no significant effect to the market share of Islamic banking in Indonesia. Then, DPK variables, ROA, and FDR have a positive effect while the NPF and the ratio have  a negative effect on the market share of Islamic banking in Indonesia. From the analysis, it can be implied that the bank should increase deposits and ROA because they will have an effect on increasing the market share of Islamic banking in Indonesia; and the NPF and the bank should lower the ratio because they will reduce the market share of Islamic banking in Indonesia.

 

 

Penelitian ini mengenai perbankan syariah. Data pada penelitian ini adalah data sekunder dan diperoleh dari laporan bank Indonesia yang dipublikasikan. Data-data tersebut terdiri dari  Statistik Perbankan Syariah (SPS) and Laporan Perkembangan Perbankan Syariah (LPPS). Metode analitik yang digunakan adalah multiple linear regression, F test dan t test. Berdasarkan perhitungan F tes, bisa dikatakan bahwa indikator-indikator seperti  ROA, NPF, FDR, dan nisbah secara bersama-sama mempengaruhi pangsa pasar perbankan Islam di Indonesia. Sedangkan berdasarkan t tes yang sudah dilakukan, deposit variabel termasuk di dalamnya adalah ROA, NPF dan nisbah mempunyai efek yang signifikan sedangkan variabel FDR tidak berpengaruh signifikan terhadap pangsa pasar perbankan Islam di indonesia. Kemudian, variabel DPK, ROA, dan FDR mempunyai pengaruh positif  sedangkan NPF dan nisbah berpengaruh negatif terhadap pangsa pasar perbankan Islam di Indonesia. Berdasarkan analisis yang dilakukan, bisa disimpulkan bahwa bank seharusnya meningkatkan deposits dan ROA karena berefek pada peningkatan pada pangsa pasar perbankan Islam di Indonesia kemudian NPF dan bank seharusnya menurunkan nisbah karena akan menurunkan pangsa pasar perbankan Islam di Indonesia. 
ANALISIS SISTEM PUSAT PELAYANAN PERMUKIMAN DI KOTA YOGYAKARTA TAHUN 2014
Authors: Utari MG. Endang Sri
Published: September 2015

          Penilitan ini bertujuan untuk mengetahui karakteristik Kota Yogyakarta dan mengetahui kecamatan – kecamatan sebagai pusat pertumbuhan melalui kelengkapan fasilitas yang tersedia yang disesuaikan dengan pusat pertumbuhan kota yang terdapat dalam Rencana Tata Ruang Wilayah (RTRW) Kota Yogyakarta. Penelitian menggunakan populasi kecamatan di Kota Yogyakarta. Metode pengumpulan data menggunakan metode dokumentasi. Analisis yang digunakan adalah analisis skalogram. Berdasarkan hasil penelitian menunjukkan bahwa Kecamatan Umbulharjo dan Kecamatan Gondokusuman memiliki tingkat orde yang paling tinggi. Kecamatan yang telah diproyeksikan sebagai pusat kota dalam RTRW Kota Yogyakarta tahun 2010 ternyata belum sesuai dengan hasil analisis skalogram.

The goal of this research are to determine the characteristics of the city of Yogyakarta and find out thesub-districts as centers of growth through complete facilities available that are tailored to urban growth centers contained in the Spatial Plan (RTRW) of Yogyakarta. The population of this research is sub-districts in the Yogyakarta City. The method of accumulating data used are documentation. The analysis used are scalogram analysis. Based on the results of the research showed that the Umbulharjo and Gondokusuman have the highest level of order. The Sub-district that has been projected as a center in the city of Yogyakarta in 2010 RTRW apparently not in accordance with the results of the analysis scalogram.
DUKUNGAN KELUARGA DAN TOKOH MASYARAKAT TERHADAP KEAKTIFAN PENDUDUK KE POSBINDU PENYAKIT TIDAK MENULAR
Authors: Umayana Haniek Try , Cahyati Widya Hary
Published: September 2015

Jumlah posbindu PTM di Kota Semarang semakin meningkat, tetapi jumlah kunjungannya semakin menurun dari tahun 2012 sebesar 470 orang menjadi 398 orang tahun 2013. Salah satu permasalahan di masyarakat adalah kurangnya dukungan dan kepedulian dari anggota keluarga dan tokoh masyarakat terhadap pemeriksaan kesehatan secara rutin yang berdampak pada tingkat kunjungan masyarakat ke posbindu PTM. Tujuan dari penelitian ini untuk mengetahui hubungan antara dukungan keluarga dan dukungan tokoh masyarakat dengan keaktifan penduduk ke kegiatan posbindu PTM di Kota Semarang. Desain penelitian pada tahun 2014 ini menggunakan metode analitik observasional dengan pendekatan cross sectional study. Sampel berjumlah 258 orang yang diambil dengan teknik purposive sampling. Analisis data menggunakan analisis univariat dan analisis bivariat (chi square test dengan α = 0,05). Hasil penelitian menunjukkan bahwa faktor dukungan keluarga (p value = 0,0001) dan dukungan tokoh masyarakat (p value = 0,001) berhubungan dengan keaktifan penduduk ke kegiatan posbindu PTM di Kota Semarang. Simpulan dari hasil penelitian bahwa ada hubungan antara dukungan keluarga dan dukungan tokoh masyarakat dengan keaktifan penduduk ke kegiatan posbindu PTM di Kota Semarang.

 

The number of posbindu NCD in Semarang City is increased, but the number of visits decreased in 2012 from 470 people to 398 people in 2013. A problem that family support and community leader care had less to check their health as a whole, so public visit rate had less. The purpose of the research was to determine associated of family support and community leader support with the actively of inhabitants to posbindu NCD in Semarang City. Study design at 2014 used observational analytical method with cross sectional study approach. The sample totaled by 258 people by purposive sampling. Data analysis was performed using univariate and bivariate (chi square test with α = 0.05). The results showed that family support (p value = 0.0001) and community leader support (p value = 0.001) have correlation with the actively of inhabitants to  posbindu NCD in Semarang City are. A summary result that there were correlation between family support and community leader support with  the actively of inhabitants to  posbindu NCD in Semarang City
POLA ASUH DAN PEMBENTUKAN PERILAKU SEKSUAL BERISIKO TERHADAP HIV/AIDS PADA WARIA
Authors: Rokhmah Dewi
Published: September 2015

Ketidakharmonisan hubungan antara anak dan orang tua yang tidak harmonis, bertentangan, kejam, penuh dengan tekanan serta mengakibatkan kondisi patologis di keluarga. Hal ini menjadi faktor pendorong dalam pembentukan perilaku seksual yang menyimpang yang mengarah pada risiko penularan HIV/AIDS. Penelitian dilakukan pada tahun 2015. Metode yang digunakan dalam penelitian ini adalah metode qualitative dengan pendekatan fenomenologi. Informan diambil secara purposive sampling, pada 10 waria non pekerja seks. Data dikumpulkan melalui wawancara mendalam dan dianalisa menurut isi tema. Hasil penelitian menunjukkan bahwa sebagian besar responden menjadi waria karena pola asuh yang koersif (keras). Sebagian kecil responden menjadi waria karena pola asuh orang tua dimana peran ibu sangat dominan (kehilangan figure ayah) dan pola asuh orang tua yang permisif. Dimana kondisi ini mengakibatkan eksistensi dan identitas sebagai waria menjadi lebih kuat, serta mempengaruhi perilaku seksual mereka pada saat memasuki usia remaja dan dewasa yang sangat rentan terhadap penularan HIV/AIDS, seperti melakukann oral dan anal seks dengan bergonta-ganti pasangan tanpa menggunakan kondom atau pelicin. Dibutuhkan upaya yang komprehensive antara pemerintah dan masyarakat dalam melakukan promosi kesehata.

 

The interference in relation between child and parents that unharmony, controvertion, cruel, full of hypocrisy, and family constelation patologycally. It being predisposition for the forming of risk sexual deviation in transmition of HIV/AIDS. This study conducted at 2015. The method of this research is qualitative exploration with fenomenology disclosure. Informan is taken by purposive sampling. They’re 10 Non Comersial Sexual Worker of Transsexual. Data is collected by indepth interview and is analysed by thematic content analysis. The result of this research showed that almost all respondent being transsexual because of coersive parenting role. A few of respondent being transsexuals because the parenting role of mother dominantly, and permisive parenting role. This condition caused identity and existency or respondent as transsexual being strongly. It influenced their sexual behaviour in adolecence and adult period being risky in transmition of HIV/AIDS, such as doing oral and anal sex with various partner, without using condom or lubrican. It needs a comprehensive effort both goverment and society for health promoting.
A kórházi adatlapok jelentéseinek alkalmazhatósága epidemiológiai elemzésekre az ischaemiás cerebrovascularis betegségek példája alapján
Authors: Ajtay András , Oberfrank Ferenc , Bereczki Dániel
Published: September 2015

Introduction: In single-payer health care financing systems data extracted from hospital report forms submitted for reimbursement purposes may be used for epidemiological investigations. Aim: Based on data submitted by 14 neurological wards in Central Hungary the authors examined the reliability of these reports. Method: Analyses were performed for the 3-digit codes of the 10th version of the International Classification of Diseases for cerebral infarcts (ICD-10 I63+I64) reported for the National Health Insurance Fund. Results: The number of cases in individual hospitals changed between a decrease by 35% and an increase by 73% from the first to the second half of the year 2012, reflecting changes in the size of the catchment area of the hospitals in July 2012. Of those with an ICD-10 I63 or I64 discharge diagnosis 54–84% had acute stroke. Neurological wards cared for 34–98% of all stroke patients. The diagnoses submitted for reimbursement purposes corresponded in over 99% to the diagnoses in the hospital discharge reports. Inaccuracies occurred in a larger proportion (about 20%) in coding the DRG financing categories. Conclusions: Databases created from hospital reports submitted for reimbursement purposes can be used reliably in Hungary for stroke epidemiological studies. Orv. Hetil., 2015, 156(38), 1540–1546.
Vergleich rektaler und sonographischer Untersuchungsbefunde bei der Kolik des Pferdes
Authors: Bankert J. , Brehm W. , Scharner D.
Published: September 2015

Gegenstand und Ziel: Neben der routinemäßigen Untersuchung des Kolikpatienten (klinische inklusive rektale Untersuchung), kommt zunehmend die Sonographie zur Anwendung. Ziel der Studie war, die Befunde der rektalen Untersuchung mit denen der sonographischen Untersuchung bei unterschiedlichen Kolikerkrankungen zu vergleichen. Material und Methoden: In einer retrospektiven Studie wurden die Patientendaten von Pferden mit Koliksymptomen der Jahre 2012 und 2013 der Chirurgischen Tierklinik Leipzig ausgewertet. Die anhand der rektalen und sonographischen Untersuchung gestellten Verdachtsdiagnosen wurden gruppiert und den Diagnosen (Goldstandard) der operativen Behandlung bzw. der pathologischen Untersuchung gegenübergestellt. Bei konservativ behandelten Tieren wurde nur bei eindeutigem rektalem Befund eine definitive Diagnose formuliert. Für beide diagnostische Verfahren erfolgte die Ermittlung von Sensitivität, Spezifität, positivem und negativem Vorhersagewert. Ergebnisse: Bezüglich der Diagnostik des Dünndarmverschlusses erwies sich die sonographische Untersuchung als deutlich sensitiver als die rektale Befunderhebung (97,1%; 50,7%). Eine bessere Sensitivität erzielte die sonographische Untersuchung auch bei der Längsachsendrehung des großen Kolons (63,2% vs. 26,3%) und bei der Verlagerung des großen Kolons in den Milz-Nieren-Raum (90,9% vs. 72,7%). Im Fall von Kolonverlagerungen bzw. Verstopfungen des großen Kolons war die rektale Untersuchung weitaus sensitiver als die sonographische Untersuchung (96,5% vs. 8,8%) bzw. (93,6% vs. 29,8%). Schlussfolgerung und klinische Relevanz: Besonders schwerwiegende Erkrankungen, wie der Dünndarmverschluss und die Längsachsendrehung des großen Kolons, werden mithilfe der Sonographie sicherer erkannt als durch die rektale Untersuchung. Deshalb sollte unter Klinikbedingungen auf die sonographische Untersuchung des Kolikpatienten nicht verzichtet werden. Bei der Diagnostik von Verlagerungen und Verstopfungen des großen Kolons sowie von Blinddarmerkrankungen erweist sich hingegen die transrektale Palpation gegenüber der Ultraschalluntersuchung überlegen.
Porque a distância histórica não é um problema
Authors: Bevir Mark
Published: September 2015

Este artigo argumenta que as preocupações acerca da distância histórica surgiram junto ao historicismo moderno, e que elas desapareceram com o pós-fundacionismo. O historicismo desenvolvimentista do século XIX recorreu a princípios narrativos para estabelecer a continuidade entre passado e presente, e para guiar as seleções entre os fatos. No século XX, os historicistas modernos rejeitaram tais princípios, levantando assim o espectro da distância histórica; ou seja, os efeitos distorcidos do presente em relação ao passado, o abismo entre os fatos e a narração. O problema moderno era: como os historiadores podem evitar o anacronismo e desenvolver representações precisas do passado? Ao invés de utilizar princípios narrativos para selecionar fatos, os historicistas modernos apelaram aos fatos atomizados para validar narrativas. Todavia, no final do século XX, os pós-modernos (Frank Ankersmit e Hayden White) argumentaram que não havia uma maneira de estreitar a distância entre fatos e narrativas. O problema pós-moderno tornou-se o seguinte: como os historiadores deveriam conceber suas escritas, dada a inelutável distância entre fatos e narrativas? Hoje, o pós-fundacionismo descarta as preocupações tanto modernas quanto pós-modernas com a distância histórica; isso implica que todos os conceitos (não somente históricos) fundem fato e teoria; e dissolve questões de relativismo conceitual, significado textual e reencenação.
Entre golpes e dispositivos: Foucault, Certeau e a constituição dos sujeitos
Authors: Bocchetti André
Published: September 2015

A análise procura aproximações e distanciamentos entre alguns dos principais conceitos abordados por Michel de Certeau e Michel Foucault, construindo uma proposta que os aproxime no estudo da constituição dos sujeitos. Foi considerada a obra A invenção do Cotidiano: 1. Artes de fazer observada a partir de contribuições de Foucault associadas à análise do discurso e à constituição moral do sujeito. As discussões apontam para uma analítica na qual discursos e práticas cotidianas são contemplados, criando reposicionamentos nos jogos de verdade constituídos a partir das produções estratégicas e táticas. Mecanismos de governo passam a ser analisados em sua capacidade de “apropriação” dos saberes locais. Os objetos constituídos nas relações de poder (instituições, mecanismos, discursos) – e não apenas seus usos – são considerados na medida em que interferem na utilização dos saberes socialmente constituídos. A partir de tais contribuições, apresenta-se uma proposta analítica que encontra nas práticas cotidianas e discursivas suas bases.
ALS–Resistant Annual Sedge (Cyperus compressus) Confirmed in Turfgrass
Authors: McCullough Patrick E. , Yu Jialin , McElroy J. Scott , Chen S. , Zhang H. , Grey Timothy L. , Czarnota Mark A.
Published: September 2015

Acetolactate synthase (ALS) inhibitors are widely used for POST control of sedges in turfgrass. A suspected resistant (R) biotype of annual sedge was collected from a bermudagrass turf in Georgia with a history of exclusive use of halosulfuron. Research was conducted to evaluate the resistance level of this biotype to halosulfuron, efficacy of ALS-inhibiting herbicides and other mechanisms of action for control, and the molecular and physiological basis for resistance. In greenhouse experiments, the halosulfuron rate required to reduce shoot biomass 50% in comparison with the nontreated at 8 wk after treatment (WAT) were 8 and > 1,120 g ai ha−1for the S (susceptible) and R biotypes, respectively. Imazapic, sulfosulfuron, and trifloxysulfuron reduced biomass of the S biotype greater than 60% at 8 WAT, but biomass was reduced less than 20% for the R biotype. Glufosinate, glyphosate, MSMA, and sulfentrazone reduced shoot biomass of the R biotype by 93, 86, 97, and 45%, respectively. In laboratory experiments, the halosulfuron concentration required to inhibit ALS activity by 50% in excised leaf tissues was 5.8 and > 1,000 μM for the S and R biotypes, respectively. Gene sequencing of the R biotype revealed a Pro-197-Ser substitution that confers resistance to ALS inhibitors. This is the first report of ALS-inhibitor resistance in annual sedge and herbicide resistance in a sedge species from a turfgrass system.
Diverse Rotations and Optimal Cultural Practices Control Wild Oat (Avena fatua)
Authors: Harker K. Neil , O'Donovan John T. , Turkington T. Kelly , Blackshaw Robert E. , Lupwayi Newton Z. , Smith Elwin G. , Johnson Eric N. , Pageau Denis , Shirtliffe Steven J. , Gulden Robert H. , Rowsell John , Hall Linda M. , Willenborg Christian J.
Published: September 2015

In western Canada, more money is spent on wild oat herbicides than on any other weed species, and wild oat resistance to herbicides is the most widespread resistance issue. A direct-seeded field experiment was conducted from 2010 to 2014 at eight Canadian sites to determine crop life cycle, crop species, crop seeding rate, crop usage, and herbicide rate combination effects on wild oat management and canola yield. Combining 2× seeding rates of early-cut barley silage with 2× seeding rates of winter cereals and excluding wild oat herbicides for 3 of 5 yr (2011 to 2013) often led to similar wild oat density, aboveground wild oat biomass, wild oat seed density in the soil, and canola yield as a repeated canola–wheat rotation under a full wild oat herbicide rate regime. Wild oat was similarly well managed after 3 yr of perennial alfalfa without wild oat herbicides. Forgoing wild oat herbicides in only 2 of 5 yr from exclusively summer annual crop rotations resulted in higher wild oat density, biomass, and seed banks. Management systems that effectively combine diverse and optimal cultural practices against weeds, and limit herbicide use, reduce selection pressure for weed resistance to herbicides and prolong the utility of threatened herbicide tools.
The effects of Professional and Pedagogical Program Development Environments on Novice Programmer Perceptions
Authors: Vogts D , Calitz A P , Greyling J H
Published: September 2015

Novice programmers generally have difficulty learning to program and one of the problems contributing towards this is the program development environment used at tertiary institutions. A number of pedagogical program development environments have been developed specifically for novice programmers, but these have not been compared experimentally with professional program development environments. A study was conducted that compared the perceptions of novice programmers using a representative

professional program development environment to a pedagogical program development environment during an Introductory Programming module at a tertiary institution. It was found that the use of a pedagogical program development environment had a positive effect on the feelings of achievement and learning while learning to program, while the perceived ease of using the program development environment and the perceived difficulty of practical assignments were not affected.
Formal methods in software development: A road less travelled
Authors: Van der Poll John A
Published: September 2015

An integration of traditional verification techniques and formal specifications in software engineering is presented. Advocates of such techniques claim that mathematical formalisms allow them to produce quality, verifiably correct, or at least highly dependable software and that the testing and maintenance phases are shortened. Critics on the other hand maintain that software formalisms are hard to master, tedious to use and not well suited for the fast turnaround times demanded by industry. In this paper some popular formalisms and the advantages of using these during the early phases of the software development life cycle are presented. Employing the Floyd-Hoare verification principles during the formal specification phase facilitates reasoning about the properties of a specification. Some observations that may help to alleviate the formal-methods controversy are established and a number of formal methods successes is presented. Possible conditions for an increased acceptance of formalisms in oftware development are discussed.
A Review of the Status of Spatial Data Infrastructure Implementation in Africa
Authors: Makanga Prestige , Smit Julian
Published: September 2015

Spatial data is a key resource for the development of a nation. There is a lot of economic potential that is locked away in spatial data collections and this potential is realised by making the data widely available. Spatial Data Infrastructures (SDI) provide a platform for spatial data users, producers and those that manage it, to distribute the data more efficiently. Governments all over the world are realising the value of National Spatial Data Infrastructures (NSDI), and therefore making major investments to establish them. However, in Africa, implementation of formal NSDI is being done at a seemingly slow pace. This paper presents an assessment of the status of NSDI activity in Africa. 29 countries were used in the survey and an assessment was made per region (South, West, East, North and Central Africa). The results show that generally, formal NSDI activity in most African countries is still in its infancy. The paper also gives recommendations of possible measures that can be taken to foster SDI implementation on the continent. In addition, it highlights potential areas for further SDI research.
Collocation Impact on Team Effectiveness
Authors: Eccles M , Smith J , Tanner M , Van Belle JP , Van der Watt S
Published: September 2015

The collocation of software development teams is common, specially in agile software development environments. However little is known about the impact of collocation on the team’s effectiveness. This paper explores the impact of collocating agile software development teams on a number of team effectiveness factors. The study focused on South African software development teams and gathered data through the use of questionnaires and interviews.

The key finding was that collocation has a positive impact on a number of team effectiveness factors which can be categorised under team composition, team support, team management and structure and team communication. Some of the negative impact collocation had on team effectiveness relate to the fact that team members perceived that less emphasis was placed on roles, that morale of the group was influenced by individuals, and that collocation was invasive, reduced level of privacy and increased frequency of interruptions. Overall through it is proposed that companies should consider collocating their agile software development teams, as collocation might leverage overall team effectiveness.
How Can Secure Software be Trusted?
Authors: Futcher Lynn , Von Solms Rossouw
Published: September 2015

The security of software applications is a major concern, especially for information owners, software developers and users. Increasingly, these stakeholders need to be confident that the software applications being developed are secure and can be trusted when used in the intended environment. However, a problem exists in terms of how to confidently address the security of software applications in order to protect the information to be stored, processed and transmitted by them, thereby increasing their associated levels of trust. The purpose of this paper is therefore to address some key aspects relating to the security and trustworthiness of a software application functioning within the intended environment. These key aspects include those relating to the security controls implemented and installed by the software developers and those involving the actual usage of the security controls implemented.
Evaluating Usage Control Deterrents
Authors: PADAYACHEE KESHNEE , Eloff J.H.P.
Published: September 2015

This paper explores the effectiveness of usage control deterrents. Usage control enables finer-grained control over the usage of objects than do traditional access control models. Deterrent controls are intended to discourage individuals from intentionally violating information security policies or procedures. In this context, an adaptation of usage control is assessed as a proactive means of deterrence control to protect information that cannot be adequately or reasonably protected by access control. These deterrents are evaluated using the design science methodology. Parallel prototypes were developed with the aim of producing multiple alternatives, thereby shifting the focus from purely usability testing to model testing.
Academic Perceptions of the Ideal Computer Science Student
Authors: Thinyane Hannah
Published: September 2015

This paper presents the results of a case study aimed at identifying the skills that lecturers in a computer science department value in an undergraduate student, and to determine if there is a departmental construction of an ‘ideal’ student. To answer this question, a case study was undertaken in the Computer Science Department at a small university in South Africa. Participants were asked to complete a questionnaire and to take part in an interview to solicit feedback on their notion of an ‘ideal’ student. This study found that participants valued the following skills within undergraduate student: creativity; computer playfulness; planning, analytical or abstract thinking, and problem solving; introverted personality; engagement in class; working independently; self efficacy; and responsibility. It also found a strong correlation between participant’s own performance as a student and their understanding of an ‘ideal’ student. These results are then discussed within the context of South African Higher Education, where student populations are becoming more diverse. The paper calls for academics to reflect on their own teaching, and the relevance of their practices to the present conditions of transformation in Higher Education in South Africa.
Perceived Relevance of an Introductory Information Systems Course to Prospective Business Students
Authors: Govender Irene , Naidoo Elvira
Published: September 2015

The study is designed to examine students’ perceptions of the introductory Information Systems (IS) course. It was an exploratory study in which 67 students participated. A quantitative approach was followed making use of questionnaires for the collection of data. Using the theory of reasoned action as a framework, the study explores the factors that influence non-IS major students’ perceived relevance of the IS introductory course. The analysis of collected data included descriptive and inferential statistics. Using multiple regression analysis, the results suggest that overall, the independent variables, relevance of the content, previous IT knowledge, relevance for professional practice, IT preference in courses and peers’ influence may account for 72% of the explanatory power for the dependent variable, perceived relevance of the IS course. In addition, the results have shown some strong predictors (IT preference and peers’ influence) that influence students’ perceived relevance of the IS course. Practical work was found to be a strong mediating variable toward positive perceptions of IS. The results of this study suggest that students do indeed perceive the introductory IS course to be relevant and match their professional needs, but more practical work would enhance their learning. Implications for theory and practice are discussed as a result of the behavioural intention to perceive the IS course to be relevant and eventually to recruit more IS students.
Extracting salient features for network intrusion detection using machine learning methods
Authors: Staudemeyer Ralf C. , Omlin Christian W.
Published: September 2015

This work presents a data preprocessing and feature selection framework to support data mining and network security experts in minimal feature set selection of intrusion detection data. This process is supported by detailed visualisation and examination of class distributions. Distribution histograms, scatter plots and information gain are presented as supportive feature reduction tools. The feature reduction process applied is based on decision tree pruning and backward elimination. This paper starts with an analysis of the KDD Cup '99 datasets and their potential for feature reduction. The dataset consists of connection records with 41 features whose relevance for intrusion detection are not clear. All traffic is either classified `normal' or into the four attack types denial-of-service, network probe, remote-to-local or user-to-root. Using our custom feature selection process, we show how we can significantly reduce the number features in the dataset to a few salient features. We conclude by presenting minimal sets with 4--8 salient features for two-class and multi-class categorisation for detecting intrusions, as well as for the detection of individual attack classes; the performance using a static classifier compares favourably to the performance using all features available. The suggested process is of general nature and can be applied to any similar dataset.
Usability Evaluation for Business Intelligence Applications: A User Support Perspective
Authors: Jooste Chrisna , Van Biljon Judith Arnoldine , Mentz Jan
Published: September 2015

Business Intelligence (BI) applications provide business information to drive decision support. Usability is one of the factors determining the optimal use and eventual benefit derived from BI applications. The documented need for more BI usability research together with the practical necessity for BI evaluation guidelines in the mining industry provides the rationale for this study. The purpose of the study was to investigate the usability evaluation of BI applications in the context of a coal mining organization. The research is guided by the question: How can existing usability criteria be customized to evaluate the usability of BI applications. The research design included user observation, heuristic evaluation and a survey. Based on observations made during user support on a BI application used at a coal mining organization a log of usability issues was compiled. The usability issues extracted from this log was compared and contrasted with general usability criteria from literature to synthesize an initial set of BI usability evaluation criteria. These criteria were used as the basis for a heuristic evaluation of the BI application used at the coal mining organization. The same BI application was also evaluated using the Software Usability Measurement Inventory (SUMI) standardized questionnaire. The results from the two evaluations were triangulated and then compared with the BI user issues again to contextualize the findings and synthesize a validated and refined set of criteria. The main contribution of the study is the usability evaluation criteria for BI applications presented as guidelines. These guidelines deviate from existing evaluation guidelines in the emphasis on information architecture, learnability and operability.
Database Application Schema Forensics
Authors: Beyers Hector Quintus , Olivier Martin S , Hancke Gerhard P
Published: September 2015

The application schema layer of a Database Management System (DBMS) can be modified to deliver results that may warrant a forensic investigation. Table structures can be corrupted by changing the metadata of a database or operators of the database can be altered to deliver incorrect results when used in queries. This paper will discuss categories of possibilities that exist to alter the application schema with some practical examples. Two forensic environments are introduced where a forensic investigation can take place in. Arguments are provided why these environments are important. Methods are presented how these environments can be achieved for the application schema layer of a DBMS. A process is proposed on how forensic evidence should be extracted from the application schema layer of a DBMS. The application schema forensic evidence identification process can be applied to a wide range of forensic settings.
MUUX-E, a framework of criteria for evaluating the usability, user experience and educational features of m-learning environments
Authors: Harpur Patricia-Ann , De Villiers Ruth
Published: September 2015

Higher education students use mobile phones, equipped for Internet access. Mobile technologies can offer effective, satisfying and accessible m-learning experiences. A contribution has been made to knowledge on evaluating m-learning environments and to mobile human-computer interaction (MHCI), with the innovative synthesis of the MUUX-E Framework, which fills a gap in the domain of m-learning. MUUX-E is a single comprehensive, multi-faceted instrument for evaluating m-learning environments, emphasising usability and user experience in mobile educational contexts. It was developed by extensive literature studies on each aspect, and has five categories, 31 criteria and numerous sub-criteria. Using a design-based research paradigm, MUUX-E was applied iteratively to evaluate and enhance successive versions of m-LR, a mobile application created for a Software Engineering module. Participants were students and expert evaluators. MUUX-E served well to identify problems and strengths. The students were more positive than the experts regarding the benefits of m-LR, yet insightfully reported more system problems.
Socioeconomic correlates of global mammalian conservation status
Authors: Polaina Ester , González-Suárez Manuela , Revilla Eloy
Published: September 2015

The main causes of biodiversity decline are related to human use of resources, which is ultimately triggered by the socioeconomic decisions made by individuals and nations. Characterizing the socioeconomic attributes of areas in which biodiversity is most threatened can help us identify decisions and conditions that promote the presence or absence of threats and potentially suggest more sustainable strategies. In this study we explored how diverse indicators of social and economic development correlate with the conservation status of terrestrial mammals within countries explicitly exploring hypothesized linear and quadratic relationships. First, comparing countries with and without threatened mammals we found that those without threatened species are a disparate group formed by European countries and Small Island Developing States (SIDS) with little in common besides their slow population growth and a past of human impacts. Second, focusing on countries with threatened mammals we found that those with a more threatened mammalian biota have mainly rural populations, are predominantly exporters of goods and services, receive low to intermediate economic benefits from international tourism, and have medium to high human life expectancy. Overall, these results provide a comprehensive characterization of the socioeconomic profiles linked to mammalian conservation status of the world's nations, highlighting the importance of transborder impacts reflected by the international flux of goods, services and people. Further studies would be necessary to unravel the actual mechanisms and threats that link these socioeconomic profiles and indicators with mammalian conservation. Nevertheless, this study presents a broad and complete characterization that offers testable hypotheses regarding how socioeconomic development associates with biodiversity.
Gingival Crevicular Fluid Levels of Sclerostin, Osteoprotegerin, and Receptor Activator of Nuclear Factor‐κB Ligand in Periodontitis
Authors: Balli Umut , Aydogdu Ahmet , Dede Figen Ongoz , Turer Cigdem Coskun , Guven Berrak
Published: September 2015

Background: To investigate changes in the levels and relative ratios of sclerostin, osteoprotegerin (OPG), and receptor activator of nuclear factor‐κB ligand (RANKL) in the gingival crevicular fluid (GCF) of patients with periodontitis after non‐surgical periodontal treatment.

Methods: Fifty‐four individuals (27 healthy controls and 27 patients with chronic periodontitis [CP]) were enrolled in the study. Periodontitis patients received non‐surgical periodontal therapy. GCF sampling and clinical periodontal parameters were assessed before and 6 weeks after therapy. Sclerostin, OPG, and RANKL levels were measured by enzyme‐linked immunosorbent assay, and their relative ratios were calculated.

Results: Total amounts and concentrations of sclerostin were significantly higher in patients with CP than in healthy individuals (P <0.025) and decreased after treatment (P <0.05). The RANKL/OPG ratio was significantly lower in healthy individuals than in patients with periodontitis before and after treatment (P <0.025), but no significant difference was observed in patients with periodontitis after treatment (P >0.05). The sclerostin/OPG and sclerostin/RANKL ratios were significantly lower in healthy individuals than in patients with periodontitis before and after treatment (P <0.025) and decreased in patients with periodontitis after treatment (P <0.05).

Conclusions: The GCF sclerostin level may be more reliable than the RANKL/OPG ratio as a diagnostic and prognostic marker of periodontal disease and treatment outcome. Regulation of sclerostin levels may aid the development of new therapeutic strategies for the treatment of periodontal disease.
Integrated Characterization and Modeling of Faults and Fractures: Their Impact on Reservoir Performance with Changing In-situ Stresses, Abu Dhabi
Authors: Edris M. A. , Amin M. Haggag , Al Benali K. , Hartley L. J. , Baxter S. , Joyce S. J. , Shinde A. L. , Perumalla S. V. , Barton C. A.
Published: September 2015

ADCO's onshore oil field lies along an elongated highly faulted northeast-southwest anticlinal trend. The main reservoirs are part of the Lower Cretaceous Upper Thamama Group, in particular the Shuaiba and Kharaib Formations interbedded with dense limestones. The impact of faults and associated fractures on fluid flow and reservoir connectivity within the field has been previously uncertain. Flow in these reservoirs is believed to be matrix dominated, but there is some evidence that fracturing enhances fluid flow in some areas as well as vertically across dense zones. This might become more pronounced with changes in reservoir pressure. This paper describes an integrated approach in detecting occurrence and disposition of fractures, their impact on fluid flow and sensitivity to changes of in-situ stresses.

ADCO has interpreted many faults from 3D seismic data, and has drilled a deviated cored well across a major fault in the reservoir. Core, logs, image log, petrographic analysis and pressure measurements across the fault have provided invaluable information and knowledge in understanding the relationships between fracture occurrence and rock mechanical/petrophysical properties. This is complemented with fracture characterization and structural interpretation from image logs of 32 vertical, deviated and horizontal wells. Finer scale structural information has been extracted from inspection of the cores from more than 30 wells.

Overall, fractures are scarce, but their occurrence has given encouraging correlation with (1) reservoir rock type, (2) porosity, (3) distance to fault and (4) structural anomalies evident in seismic curvature attributes. These correlations support the extrapolation of interpretations away from the wells to identify where fractures are most likely to affect reservoir performance. Quantification of the effect of such fractures on production have been calibrated using an integrated analysis of lab test scale permeability at different confining pressures alongside CT-scans identifying small scale fracturing, and in-situ permeability measurements from well tests and production logging of well intervals with imaged fractures.

The novel parts of the workflow are how this characterization has produced a 3D discrete fracture network model with apertures of fractures controlled by present or future in-situ stress. When this fracture model is integrated with the 3D geomechanical model, the upscaled directional fracture permeabilities have shown sensitivity to production behavior based on the degree of reservoir depletion / injection.
Generation of Black-Oil PVT Properties Tables Using Tuned EOS Model by Integrating PVT Laboratory Test Datasets
Authors: Singh Ajay , Khan Hasnain
Published: September 2015

This paper describes the workflow used to develop a systematic approach for integrating a large number of pressure-volume-temperature (PVT) datasets and generating representative PVT tables for use in a black-oil reservoir simulation. The field in this study is a faulted carbonate reservoir with multiple producing zones. A variation in PVT properties was evident from laboratory tests conducted on the collected fluid samples. The challenge was to design a systematic approach for capturing PVT property variations, performing oil compositional variation modeling, and understanding PVT compartmentalization. A simplified approach is proposed that combines PVT properties variation and PVT compartmentalization into a single workflow. PVT properties variations were used to identify various trend lines, and PVT samples belonging to a trend line were assigned to one PVT compartment. An equation of state (EOS) model was tuned for each PVT compartment, and the tuned EOS was used to model compositional variation and properties variation with depth. Validation of the workflow was performed by assessing the quality of the EOS tuning and EOS calculated compositional gradient match with laboratory measured data. It was discovered that EOS models were able to capture PVT properties variation and compositional variation with depth. The workflow was found very useful for generating a new set of PVT tables required for history matching reservoir pressure.
Development of Parallel Reservoir Simulators on Distributed-memory Supercomputers
Authors: Liu Hui , Wang Kun , Chen Zhangxin , Luo Jia , Wu Shuhong , Wang Baohua
Published: September 2015

This paper presents our work on developing parallel reservoir simulators for improving oil recovery on distributed-memory parallel systems and studying the scalability of our parallel reservoir simulators. The reservoir simulators are based on our in-house parallel platform, PRSI (Parallel Reservoir Simulation Infrastructure), which provides grid, data, linear solvers, preconditioners, distributed matrix and vector management, well modeling and visualization support. Based on this platform, a black oil simulator and a thermal simulator have been implemented. Benchmarks show that our parallel simulators are thousands of times faster than sequential simulators that designed for workstations and personal computers.
Creating Variance Cube from Seismic Data and Converting to Transmissibility Multiplier Pattern to Assist History Match
Authors: Gao John , Schrijver Bart
Published: September 2015

This paper demonstrates how to utilize seismic data to create a variance cube with different values and convert it into a transmissibility multiplier pattern to assist the history match in dynamic simulation.

Lateral variations of the seismic signal can be related to various reasons, such as faults respectively associated fault damage zones and sedimentological bodies like channel features. Dissimilarities within the seismic data can be emphasized by calculating a variance attribute. The different value ranges within the variance cube can in the chosen examples be associated to the fault plane itself and different intensities of fault related rock alterations or channel characteristics, e.g. erosional planes. These features can result in improved or reduced lateral transmissibility as poor or good rock properties coincide with poor or good transmissibility for fluid flow. The variance value patterns can be analyzed and categorized according to the discrete value ranges. Then the categories are converted to reference numbers, e.g. variance reference number 1 represents a good transmissibility (e.g. a channel body), 2 represents reasonable and 4 represents the poorest class (e.g. an intense faulted zone). Subsequently the variance reference number is converted to a transmissibility multiplier value. During the history match process, these multipliers are adjusted in order to improve the history match.

The advantage of this approach is that it does not only change the transmissibility multiplier in one cell, but changes the transmissibility multiplier value of each cell that belongs to one type of rock quality (one variance reference number or one transmissibility group) in one calculation. This is especially useful where there is limited history data and the variance data indicates similar patterns throughout the variance cube. This method can speed up the history matching as it is a batch change of transmissibility multipliers, similar to the fault transmissibility multiplier method in ECLIPSE but with a wider application. In a case study a comparison was conducted with using the variance cube / transmissibility multiplier patterns and confirmed the method workable.

In conclusion using the variance cube to create transmissibility multiplier patterns is an efficient way to assist and improve history matching, especially in fields with limited well control.

This paper presents a new way of creating transmissibility multipliers based on seismic data (variance attribute) and assisting and improving the history match process
Minimization and Removal of Wellbore Storage Effect by Direct Deconvolution of Well Test Data
Authors: Dastkhan Zohrab , Zolalemin Ali , Razminia Kambiz , Parvizi Hadi
Published: September 2015

Wellbore storage effect is a common issue in pressure transient analysis which masks the early response of reservoir behaviour and flow regime. It distorts most of valuable pressure data especially in cases with large well volume, high mechanical damage, and compressible fluids. As a consequence, the early response of fast-occurring phenomena such as dual porosity transition, linear flow and bilinear flow can be partially or completely distorted.

In this paper, a procedure is proposed and applied to enhance the applicability and effectiveness of direct deconvolution methods for calculation of wellbore storage-free pressure response. The proposed procedures are tested and validated in large-volume wells in the Middle East where wellbore storage has distorted the whole well test data points. We found that these methods can be followed to identify early flow regime types and to calculate permeability, skin and natural fractures properties with the lowest uncertainty.