bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANALISIS KUALITAS SISTEM INFORMASI AKADEMIK MENGGUNAKAN METODE IMPORTANCE PERFORMANCE ANALYSIS (IPA) (STUDI KASUS PADA WEBSITE PORTAL AKADEMIK UNIVERSITAS XYZ BANDUNG)
Authors: Ellyusman Sylvi 
Published: May 2018

Sistem informasi akademik merupakan suatu sistem yang dirancang khusus untuk dapat mengelola berbagai data akademik dengan banyak entitas, kepuasan mahasiswa sebagai stakeholder merupakan bagian yang penting bagi Universitas, tata kelola Portal Akademik yang baik perlu dilakukan. Berdasarkan dokumen Laporan Helpdesk Universitas XYZ terdapat 522 keluhan pada Website Portal Akademik. Website terkadang mengalami gangguan misalnya sistem yang down, erorr saat melakukan registrasi, dan kehilangan data. Penelitian ini bertujuan untuk mengetahui harapan dan penilaian pengguna terhadap kualitas Website Portal Akademik, serta idikator yang harus ditingkatkan untuk mendukung peningkatan kualitas Website Portal Akademik. Penelitian ini menggunakan Metode Kuantitatif dengan Teknik Analisa Deskriptif (Analisis Jenjang) dan Metode Importance Performance Analysis (IPA) berdasarkan indikator WebQual 4.0. Kuesioner disebarkan kepada 439 responden mahasiswa pada tujuh fakultas di Universitas XYZ, serta melakukan wawancara kepada manajer operasional dan pengelola data centre Direktorat Sistem Informasi. Hasil penelitian ini menunjukan bahwa secara keseluruhan penilaian kinerja Website Portal Akademik memiliki skor rata-rata sebesar 1499.30 atau 68.31% masuk dalam kategori baik, namun terdapat satu sub variabel dimana kinerjanya berada pada kategori sedang yaitu sub variabel Service interaction. Pengguna memiliki tingkat harapan yang tinggi terhadap seluruh sub variabel dengan skor rata-rata sebesar 1787.23 atau 81%. Hasil dari pemetaan diagram IPA, kuadran I diisi oleh indikator website menyampaikan rasa kompetensi (dapat diakses setiap saat), website menyediakan informasi dengan detail, dan pengguna merasa aman terhadap informasi pribadinya (informasi tidak pernah hilang atau berubah), tiga indikator tersebut harus menjadi konsentrasi Bagian Direktorat Sistem Informasi untuk melakukan perbaikan pada Website Portal Akademik. Kata Kunci: Sistem Informasi, WebQual 4.0, Importance Performance Analysis (IPA)
The perfect regression and causality test: A solution to regression problems
Authors: Alghalith Moawia 
Published: May 2018

Summary
We introduce a method that eliminates the specification error and spurious relationships in regression. In addition, we introduce a test of strong causality. Furthermore, hypothesis testing (inference) becomes almost unneeded. Moreover, this method virtually resolves error problems such as heteroscedasticity, autocorrelation, non-stationarity and endogeneity.
The Development of Compensation System in Serbia: A Comparison of Two Successive Cranet Research Rounds
Authors: Berber Nemanja , Slavić Agneš 
Published: May 2018

Abstract
The aim of this paper is to explore the development of the compensation practice in the context of human resource management (HRM) in Serbia. The objectives are to detect the extent of the usage of different elements in the compensation packages, the level of negotiation during the determination of the basic pay, the responsibility for decision making process regarding basic pay, the extent of the usage of different types of benefits, and to explore the differences between these data in the two research periods, 2008-2010 and 2014-2016. The methodology in this paper includes the theoretical analysis of the compensation systems, as well as the comparative analysis of the data on compensation in Serbia based on the Cranet research. The sample of the study consisted of 210 organisations from Serbia, 50 organisations in the 2008-2010 period and 160 organisations in the 2014-2016 period. This paper brings new insights to the development of comparative compensation management since it points to the development/changes of the compensation practice (in years) in Serbian HRM.
Colonic Diverticulosis: From Asymptomatic Form to Major Complications
Authors: Miulescu Ana Maria , Ispas Alexandru 
Published: May 2018

Abstract

Introduction This pathology is rare in patients younger than 40 years old (5%) and, in those older than 70 years old, almost 50% exhibit colonic diverticulosis. Most cases have mild symptoms and only 20% presents complications as: bleeding, bowel obstruction, abscess and secondary peritonitis.

Aim. The aim is to analyse different types of complications in colonic diverticulosis and compare the data from literature to those in Argeș geographical area.

Material and method. The medical records of 120 patients out of which 101 were admitted in gastroenterology department and 19 in general surgery department were analysed. Diagnosis methods: colonoscopy, computed tomography with contrast dye, simple abdominal radiograph for acute abdominal pain.

Results. 40 patients (33.33%) with asymptomatic colonic diverticulosis, 28 patients (23.33%) moderate diverticulitis, 25 patients (20.83%) with moderate anorectal bleeding, 25 patients (20.83%) with secondary peritonitis, and 2 (1.68%) cases with complications.

Conclusions. All the patients were older than 50 years old, 44 % of diverticulitis cases led to complications (almost half with bleeding and the rest with peritonitis). No bowel obstruction. In 99% of the cases, the localisation of the diverticula was at the level of sigmoid and descending colon.
Challenges for Modern Monetary Policy
Authors: Fabris Nikola 
Published: May 2018

Abstract
The first central banks were founded in the XVII century and monetary policy has been evolving ever since. Knowledge on monetary economy has improved significantly over the last couple of decades and a consensus has been reached in a number of areas. As a result, hyperinflations have been extremely rare over the past decades.
The global financial crisis challenged traditional monetary policy that was based on the approach involving one instrument (reference interest rate) and one goal (price stability). It is obvious that we need a new approach to monetary policy and I believe that changes will happen gradually in the future.
This paper consists of two parts. The first part covers the traditional monetary policy and deals with issues where consensus has been reached, as well as with issues on monetary policy objectives, transparency, and macroprudential policy.
The second part addresses the issues that pose a challenge for monetary policy and for which there is no complete consensus. This part elaborates on the dilemma involving rules versus discretions, a new approach to banking supervision, monetary policy during a crisis, the role of econometric models, and the need for international coordination of monetary policy.
Method of Constructing the Fuzzy Regression Model of Bank Competitiveness
Authors: Malyaretz Liudmyla , Dorokhov Oleksandr , Dorokhova Liudmyla 
Published: May 2018

Abstract
The paper substantiates the need to consider economic efficiency indicators of bank activity as fuzzy quantities. Formulations of the problem of fuzzy regression analysis and modelling, available in literary sources, have been analyzed. Three main approaches to the fuzzy regression analysis are presented. The general mathematical and meaningful formulation of problem of a fuzzy multivariate regression analysis for commercial bank competitiveness has been proposed. Sequence of its solutions is described. The example of numerical computations for one of the large Ukrainian banks is given. Results of obtained solution were analyzed from the standpoint of reliability, accuracy and compared against the classical crisp regression analysis. Finishing steps for obtaining final accurate numerical results of solution process are described. In summary, convincing arguments concerning the expediency of application of this approach to the problem of determining the competitiveness of banks are formulated and presented.
An Analysis of the Determinants of Systemic Banking Crises in Southeast European Countries
Authors: Asanović Željka 
Published: May 2018

Abstract
The purpose of this paper is to determine potential indicators of systemic banking crises in five Southeast European countries. Although signal horizon in the literature usually implies a period of 12 months before and 12 months after a crisis outbreak, models in this paper imply a 24-month pre-crisis period. Probability of a banking crisis occurrence is calculated using logit regression. Results have shown that banking system indicators have higher impact on probability of systemic banking crisis occurrence compared to macroeconomic indicators, and that the banking systems of these countries are significantly exposed to global trends.
Fourier Sine Transform Method for Solving the Cerrutti Problem of the Elastic Half Plane in Plane Strain
Authors: Ike Charles Chinwuba 
Published: May 2018

Abstract
The Fourier sine transform method was implemented in this study to obtain general solutions for stress and displacement fields in homogeneous, isotropic, linear elastic soil of semi-infinite extent subject to a point load applied tangentially at a point considered the origin of the half plane. The study adopted a stress based formulation of the elasticity problem. Fourier transformation of the biharmonic stress compatibility equation was done to obtain bounded stress functions for the elastic half plane problem. Stresses and boundary conditions expressed in terms of the Boussinesq-Papkovich potential functions were transformed using Fourier sine transforms. Boundary conditions were used to obtain the unknown constants of the stress functions for the Cerrutti problem considered; and the complete determination of the stress fields in the Fourier transform space. Inversion of the Fourier sine transforms for the stresses yielded the general expressions for the stresses in the physical domain space variables. The strain fields were obtained from the kinematic relations. The displacement fields were obtained by integration of the strain-displacement relations. The solutions obtained were identical with solutions in literature obtained using Cerrutti stress functions.
Comparison of anteroposterior and posteroanterior projection in lumbar spine radiography
Authors: Alukic Erna , Skrk Damijan , Mekis Nejc 
Published: May 2018

Abstract

Background
The aim of the study was to compare patient radiation dose and image quality in planar lumbar spine radiography using the PA and AP projection in a large variety of patients of both sexes and different sizes.

Patients and methods
In the first phase data of image field size, DAP, effective dose and image quality were gathered for AP and PA projection in lumbar spine imaging of anthropomorphic phantom. In the second phase, data of BMI, image field size, diameter of the patient’s abdomen, DAP, effective dose and image quality were gathered for 100 patients of both sexes who were referred to lumbar spine radiography. The patients were divided into two groups of 50 patients, one of which was imaged using the AP projection while the other the PA projection.

Results
The study on the phantom showed no statistically significant difference in image field size, DAP and image quality. However, the calculated effective dose in the PA projection was 25% lower compared to AP projection (p =0.008). Measurements on the patients showed no statistically significant difference between the BMI and the image field size. In the PA projection, the thickness of abdomen was 10% (p < 10–3) lower, DAP 27% lower (p = 0.009) and the effective dose 53% (p < 10–3) lower than in AP projection. There was no statistically significant difference in image quality between the AP and the PA projection.

Conclusions
The study results support the use of the PA projection as the preferred method of choice in planar lumbar spine radiography.
Literature Review of the Potential Energy Savings and Retention Water from Green Roofs in Comparison with Conventional Ones
Authors: Tselekis Kyriakoulis 
Published: May 2018

Abstract
The objective of this study is the comparison of green roof systems with conventional isolated and non-isolated ones in order to identify the potential energy savings of green roofs and the benefits provided in comparison with the cost of construction to the buildings. The region of interest is the Watergraafsmeer area in the city of Amsterdam. The method evaluates literature reports - mostly from 2003 to 2010 - that present the advantages of green roofs. Examples in real implementation of green roofs in USA, UK and Germany, retention of rainfall and a Life Cycle Assessment from a residential construction in Madrid will be introduced, showing the energy savings from insulation and heating/cooling that can be gained. All the reports have shown a reduction in energy costs and in runoff of water. Hence, costs and retrofitting potential completes the research. The age of buildings and the absence of insulation make green roofs an ideal alternative project for the retrofit of Watergraafsmeer.
Analisis Laju Reaksi Neutron Dalam Sel Bahan Bakar Nuklir Pada Reaktor Cepat
Authors: Martha Reni , Shafii Mohamad Ali , Afdal Afdal 
Published: May 2018

Analisis laju reaksi neutron dalam sel bahan bakar nuklir pada reaktor cepat sangat penting dilakukan, karena laju reaksi fisi, serapan dan total yang merata dapat mengurangi pemuncakan daya (power peaking) yang tidak diinginkan. Penelitian ini menggunakan metode collision probability (CP) dengan pendekatan flat flux yang melibatkan proses homogenisasi sel bahan bakar nuklir. Dari hasil homogenisasi sel dapat diperoleh distribusi fluks neutron sebagai fungsi energi grup. Selanjutnya dihitung laju reaksi fisi, serapan dan total pada setiap region sel. Laju reaksi fisi mengalami penurunan di daerah energi tinggi akibat adanya peristiwa tumbukan elastik yang menyebabkan neutron lebih mudah kehilangan energy. Laju reaksi serapan berfluktuasi pada bahan bakar, sedangkan pada kelongsong dan pendingin nilainya sangat rendah yaitu kurang dari reaksi/cm3s. Laju reaksi total mempunyai nilai yang tinggi pada daerah energi tinggi yaitu rentang antara sampai dengan reaksi/cm3s sedangkan pada daerah energi rendah nilainya sangat kecil yaitu kurang dari reaksi/cm3s. Kata kunci : fluks neutron, laju reaksi, reaktor cepat
Sistem Informasi Geografis Dalam Pemetaan Lahan Gambut di Kabupaten Musi Banyuasin
Authors: Wijaya Alek , Agustini Eka Puji , Nardo Eko 
Published: May 2018

Kelestarian alam adalah isu yang sangat sentral pada masa ini, hal ini di sebabkan oleh semakin banyaknya kerusakan yang alam yang terjadi dikarenakan ketidakperdulian manusia akan pentingya menjaga agar alam tetap menjadi tempat yang bersahabat untuk kehidupan kita. Salah satu penopang kelestarian alam adalah adanya kelestarian lahan gambut yang mampu menyimpan gas karbon yang berfungsi untuk menahan laju paningkatan suhu bumi. Salah satu upaya yang dilakukan untuk menjaga kelestarian lahan gambut adalah tersedianya data dan informasi tentang kondisi lahan gambut yang komprehensif dan terbaru yang bisa diakses oleh piha yang berkepentngan dengan kondisi lahan gambut. Untuk itulah dibutuhkan suatu Sistem Informasi Geografis yang di desain dan dibangun dengan menggunakan pendekatan Classic Life Cycle Model serta didukung dengan Perangakt lunak ArcGIS, UML Model dan Bahasa pemrograman PHP. Sistem informasi Geografis ini memberikan informasi pemetaan lahan gambut seperti: lokasi lahan gambut, kategori lahan gambut,lahan gambut yng sudah di kelolah dan belum dikelola.
Weyl invariance in metric f(R) gravity
Authors: Fernández Cristóbal José Ma. 
Published: May 2018

We aim to derive the most general f(R) gravity theory, including the matter, so that it be Weyl invariant. Making use of the mathematical equivalence of these theories with an type of scalar-tensor theory, and by imposing the Weyl invariance for the pure gravity as well as for the matter sector, we obtain the fundamental equation that restricts the form of V (phi) (and, accordingly, of f(R)) so that the resulting action to be Weyl invariant in the Jordan frame. We show that this action is not other than the so-called dilaton gravity action with one scalar eld,, which eective mass is R and Phi dependent. In the Einstein frame, the action becomes the Einstein-Hilbert action with the Ricci scalar being constant due to that the eective mass of scalar eld in this frame vanish. So, we can assume that the Ricci scalar, in the Einstein frame, is the true Cosmological Constant. Therefore, is not preposterous to guess that, at least mathematically, all Weyl invariant metric f(R) theory in the Jordan frame is equivalent, at classical level, to the Einstein gravity, in the Einstein frame, with a constant Ricci scalar. At quantum level, as it is known, both theories are not equivalent due to the presence of anomalies in one of the frames.
Poetry
Authors: Irie Kevin , Alvarez Al , Glasser Langille Carole , Marks Helene , Mail Michael , Ben-David Tirzah , Katz Steven B. , Faber Louis S. , Niditch B. Z. 
Published: May 2018

The Venetian GhettoA Cemetery in New MexicoMourning and MelancholiaRefusing to ExplainTrachomaGlenduffhill Cemetery EasterhouseImmigrants, Haifa 1998After the EventAkedaHoly GrammarDesecration
Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1
Authors: Jontof-Hutter Daniel , Truong Vinh H. , Ford Eric B. , Robertson Paul , Terrien Ryan C. 
Published: May 2018

Abstract
We derive lower bounds on the orbital distance and inclination of a putative planet beyond the transiting seven planets of TRAPPIST-1, for a range of masses ranging from 0.08 M
Jup to 3.5 M
Jup. While the outer architecture of this system will ultimately be constrained by radial velocity measurements over time, we present dynamical constraints from the remarkably coplanar configuration of the seven transiting planets, which is sensitive to modestly inclined perturbers. We find that the observed configuration is unlikely if a Jovian-mass planet inclined by ≥3° to the transiting planet exists within 0.53 au, exceeding any constraints from transit timing variations (TTV) induced in the known planets from an undetected perturber. Our results will inform RV programs targeting TRAPPIST-1, and for near coplanar outer planets, tighter constraints are anticipated for radial velocity (RV) precisions of ≲140 m s−1. At higher inclinations, putative planets are ruled out to greater orbital distances with orbital periods up to a few years.
Obliquity Variations of Habitable Zone Planets Kepler-62f and Kepler-186f
Authors: Shan Yutong , Li Gongjie 
Published: May 2018

Abstract
Obliquity variability could play an important role in the climate and habitability of a planet. Orbital modulations caused by planetary companions and the planet’s spin axis precession due to the torque from the host star may lead to resonant interactions and cause large-amplitude obliquity variability. Here we consider the spin axis dynamics of Kepler-62f and Kepler-186f, both of which reside in the habitable zone around their host stars. Using N-body simulations and secular numerical integrations, we describe their obliquity evolution for particular realizations of the planetary systems. We then use a generalized analytic framework to characterize regions in parameter space where the obliquity is variable with large amplitude. We find that the locations of variability are fine-tuned over the planetary properties and system architecture in the lower-obliquity regimes (≲40°). As an example, assuming a rotation period of 24 hr, the obliquities of both Kepler-62f and Kepler-186f are stable below ∼40°, whereas the high-obliquity regions (60°–90°) allow moderate variabilities. However, for some other rotation periods of Kepler-62f or Kepler-186f, the lower-obliquity regions could become more variable owing to resonant interactions. Even small deviations from coplanarity (e.g., mutual inclinations ∼3°) could stir peak-to-peak obliquity variations up to ∼20°. Undetected planetary companions and/or the existence of a satellite could also destabilize the low-obliquity regions. In all cases, the high-obliquity region allows for moderate variations, and all obliquities corresponding to retrograde motion (i.e., >90°) are stable.
Recovering the Physical Properties of Molecular Gas in Galaxies from CO SLED Modeling
Authors: Kamenetzky J. , Privon G. C. , Narayanan D. 
Published: May 2018

Abstract
Modeling of the spectral line energy distribution (SLED) of the CO molecule can reveal the physical conditions (temperature and density) of molecular gas in Galactic clouds and other galaxies. Recently, the Herschel Space Observatory and ALMA have offered, for the first time, a comprehensive view of the rotational J = 4−3 through J = 13−12 lines, which arise from a complex, diverse range of physical conditions that must be simplified to one, two, or three components when modeled. Here we investigate the recoverability of physical conditions from SLEDs produced by galaxy evolution simulations containing a large dynamical range in physical properties. These simulated SLEDs were generally fit well by one component of gas whose properties largely resemble or slightly underestimate the luminosity-weighted properties of the simulations when clumping due to nonthermal velocity dispersion is taken into account. If only modeling the first three rotational lines, the median values of the marginalized parameter distributions better represent the luminosity-weighted properties of the simulations, but the uncertainties in the fitted parameters are nearly an order of magnitude, compared to approximately 0.2 dex in the “best-case” scenario of a fully sampled SLED through J = 10−9. This study demonstrates that while common CO SLED modeling techniques cannot reveal the underlying complexities of the molecular gas, they can distinguish bulk luminosity-weighted properties that vary with star formation surface densities and galaxy evolution, if a sufficient number of lines are detected and modeled.
Onset of the Magnetic Explosion in Solar Polar Coronal X-Ray Jets
Authors: Moore Ronald L. , Sterling Alphonse C. , Panesar Navdeep K. 
Published: May 2018

Abstract
We follow up on the Sterling et al. discovery that nearly all polar coronal X-ray jets are made by an explosive eruption of a closed magnetic field carrying a miniature filament in its core. In the same X-ray and EUV movies used by Sterling et al., we examine the onset and growth of the driving magnetic explosion in 15 of the 20 jets that they studied. We find evidence that (1) in a large majority of polar X-ray jets, the runaway internal/tether-cutting reconnection under the erupting minifilament flux rope starts after both the minifilament’s rise and the spire-producing external/breakout reconnection have started; and (2) in a large minority, (a) before the eruption starts, there is a current sheet between the explosive closed field and the ambient open field, and (b) the eruption starts with breakout reconnection at that current sheet. The variety of event sequences in the eruptions supports the idea that the magnetic explosions that make polar X-ray jets work the same way as the much larger magnetic explosions that make a flare and coronal mass ejection (CME). That idea and recent observations indicating that magnetic flux cancellation is the fundamental process that builds the field in and around the pre-jet minifilament and triggers that field’s jet-driving explosion together suggest that flux cancellation inside the magnetic arcade that explodes in a flare/CME eruption is usually the fundamental process that builds the explosive field in the core of the arcade and triggers that field’s explosion.