bluuebunny/crossref_metadata_2025_split huggingface dataset:
Análise da Viabilidade Financeira Para Utilização de Estufas na Produção de Alface Hidropônica: Um Estudo de Caso Com o Uso da Metodologia Multi-Índices.
Authors: Gerais Ramos Felipe , Ketlin Kaffer Karen , Capatan Anderson 
Published: December 2018

O objetivo deste artigo é investigar a viabilidade financeira para a produção de alface hidropônica com a utilização de sistemas hidropônicos (estufas) na cidade de Mandirituba/PR. Para tanto, foram feitas entrevistas em propriedades rurais que utilizam estufas para a produção agrícola. Então, foram calculados VPL, TIR, payback descontado e IR do projeto. Depois, foi utilizada a metodologia multi-índice para mensurar os riscos associados ao projeto. Os resultados mostraram um VPL de R$ 110.120,75 e uma Taxa Interna de Retorno de 51%. Os indicadores de risco payback/N e GCR mostraram-se como médios. Já os indicadores risco de gestão, risco de negócios e TMA/TIR foram baixo/médios. Por último, o indicador ROIA, foi classificado como médio, uma vez que adiciona 4,23% de riqueza ao projeto, acima da TMA. Diante disto, confirmou-se a viabilidade financeira do projeto.
Valoración de las percepciones y satisfacción de los estudiantes sobre el servicio recibido en universidades de Cartagena de Indias - Colombia
Authors: Vergara Schmalbach Juan Carlos , Garavito Díaz Dayana , Guerra Mercado Laurent , Posso Quintana Soleimys 
Published: December 2018

Dentro de los esfuerzos que realizan las Instituciones de Educación Superior por alcanzar un nivel de calidad acorde a los tiempos se deben analizar, entre muchos aspectos, la satisfacción de los estudiantes, como un indicador para valorar dicha calidad. El presente artículo tiene como principal objetivo, proponer un modelo teórico para valorar los factores que afectan la satisfacción y posibles intenciones futuras de los usuarios. Para validar el modelo, se analizaron 3 universidades (públicas y privadas) con una muestra total de 400 estudiantes, a través de un esquema empírico resuelto mediante Modelos de Ecuaciones Estructurales. Los resultados acordaron un modelo con validez estadística, cuya principal conclusión es la identificación de un efecto causal significativo entre las percepciones, la satisfacción y las intenciones futuras de los estudiantes.
أثر الأختلالات الأقتصادية الهيكلية على التضخم حالة دراسية الأقتصاد العراقي
Authors: داود سمير سهام 
Published: December 2018

الملخص:
في محاولة لتوصيف مشكلة التضخم في الأقتصاد العراقي في ضوء قراءة للمدارس النظرية الأقتصادية ممزوجة بفهم دقيق لأسباب مشكلة التضخم الأقتصادية في الأقتصاد العراقي, هنالك علاقة وثيقة بين جمود وتشوه بنيان الأنتاج والأنتاجية وبين معدلات التضخم, والتي من أثارها تشوه نسبة مساهمة القطاعات الأنتاجية ومعدل التبادل غير المتكافىء في التجارة الخارجية, وقد يكون رفع المستوى العام للأسعار أحدى الوسائل التي أستخدمت من قبل الحكومات السابقة (التمويل التضخمي أو التمويل بالعجز) من أجل الأسراع بعملية تكوين رأس المال, وبهذا فقد ينجح أفتعال التضخم في تحقيق الأدخار الأجباري والأستثمار, الأ أن تلك الأهداف في حالة أفتراض أفتعال التضخم لتحقيق التنمية لا تمثل فهما صحيحا لطبيعة الأقتصاد العراقي .
نعم يوجد في الأقتصاد العراقي موارد أقتصادية عاطلة (أرض, رأس المال, عمل, تنظيم) لكنها ليست جاهزة للأستخدام في العملية الأنتاجية, ويعزى ذلك الى تشوه بنية وطبيعة عناصر الأنتاج, مما يجعل تلك الموارد الأقتصادية عاجزة عن الدخول في العملية الأنتاجية وزيادة الأنتاج بمجرد زيادة الطلب الفعال, ويظهر ذلك من خلال أنخفاض مستويات الأنتاجية أذا ما قورنت بالموارد الأقتصادية الكبيرة في الأقتصاد العراقي , مما يعني عدم أمتلاك الأقتصاد طاقات أنتاجية, لا بل تكاتفت العوامل الخارجية (الحروب, الحصار الأقتصادي), تشوه طبيعة الموارد الأقتصادية, سياسة التمويل بالعجز, ارتفاع الأسعار النسبية لبعض السلع الضرورية في العملية الأنتاجية (الطاقة الكهربائية, الوقود, النقل, الأيجار ) في أرتفاع تكاليف الأنتاج, لقد أدى كل ذلك الى أن يواجه الأقتصاد العراقي منحنى عرض كلي عديم المرونة, ليس بسبب الأستغلال الأمثل للموارد الأقتصادية كما في الدول الصناعية المتقدمة, ولكن بسبب عدم مرونة الجهاز الأنتاجي والطاقات الأقتصادية للأستجابة لزيادة الطلب الفعال وكما موضح في الشكل الأتي .
ولذا بأمكان البنك المركزي ومن خلال أتباع سياسة نقدية أنكماشية أن يخفف من حدة الضغوط التضخمية بأعتبار أن احد العوامل المسببة للتضخم في الأقتصاد العراقي هو أرتفاع الكتلة النقدية في السوق, ألا أنه لا يستطيع تقليل تلك الضغوط التضخمية بصورة كبيرة بسبب الأختلالات الهيكلية التي تواجه الأنتاج والعملية الأنتاجية
الرقابة الأدارية وأثرها في تماسك المرؤوسين دراسة تطبيقية في عينة من وزراة العمل والشوؤن الاجتماعية العراقية
Authors: سموعي رفاه فرج , عبد الزهرة زينة رائد 
Published: December 2018

المستخلص :
أن نظام الرقابة الادارية في المنظمات يلبي حاجة الأطمئنان على الاستخدام الأمثل والسليم للموارد والمحافظة عليها لتحقيق الأهداف التي تسعى إليها المنظمة, وبما أن نظام الرقابة الادارية يشكل جزءاً من النظام الكلي في أية منظمة فقد خضع للتطور دائماً لكي يتمكن من مواكبة التقدم في تطور العلوم الأخرى ,و ان نمو التماسك بين المرؤوسين في المنظمة يعني قدرة التأثير في أرائهم وأفكارهم وأتجاهاتهم ليغيروها لصالح اتجاهات المنظمة وقيمها وهذا ينعكس بشكل ايجابي على تماسك المنظمة, فاهتم الباحث بأثر الرقابة الإدارية في تماسك المرؤوسين داخل وزارة العمل والشؤون الاجتماعية واستخدم الباحث عينة عشوائية بمجموع (254) استبانة لقياس المتغيرات بأستخدام حزمة spss الجاهزة , وكان أهم استنتاج هو وجود أرتباط طردي عالٍ نوعاً ما بين الرقابة الإدارية وتماسك المرؤوسين وبمستوى معنوية وكذلك الحال وجود أثر للرقابة الادارية بتماسك المرؤوسين, و وجود تماسك مهني وأجتماعي عالي بين المرؤوسين مما يعزز أداءهم وعملهم داخل تشكيلات الوزارة , وأهم توصية هي ضرورة أهتمام الوزارة بتعزيز درجة التماسك مابين المرؤوسين وتعظيم نسبتها . وعلى الوزارة القيام بأجراء تنقلات للملاك مابين تشكيلات الوزارة للملاكات النخبة المتميزة الحاصلة على درجات تماسك عالية مع جميع المرؤوسين الأخرين دون ذلك المستوى لتفعيل هذا التماسك ونقل الخبرة والمعرفة الميدانية.
The library and information education crisis, or For whom the bell tolls
Authors: Mazuritsky A. M. 
Published: December 2018

The author explores the critical phenomena in modern library and information education which he regards as “ringing bells”. That is decrease of the state-financed openings in universities and specialized colleges of library and information studies; introduction of the Unified State Exam which has destroyed the system of occupational orientation at library departments; merging library departments with other departments; the problems of the faculty staffing. Arkady Sokolov identified these malignant processes as “the library school annihilation”.The author puts forward the suggestions to change the situation: restitution of Moscow State Institute of Culture as a head of professional educational institute; summoning professional conference to develop a strategy and tactics of library education; building post-graduate program to prepare professors for regional professional higher schools and colleges. The author emphasizes the critical need for the national policy for the library industry and consolidation of resources, not only those of library university department and colleges, but also the educational centers to train and retrain librarians on the premises of several major libraries.
Collection development at academic libraries: Problems and solutions
Authors: Otstavnova I. V. , Shamatonova G. L. 
Published: December 2018

The main aspects of university library collection development in changing education environment are discussed. The need for efficient management of building and using digital information resources is stressed. The focus is made on shaping the image of librarians and a professional guide, on transforming libraries’ role and exploring modern user demands in the information and technological environment. The increase in the library user number is explained by the two-level education system and new structures within the universities. The authors analyze and generalize on the university libraries practical experience. Methods and approaches toward building library collections at N. Ogarev Mordovian State University, P. G. Demidov Yaroslavl State University, Yaroslavl State Technical University are discussed. The authors emphasize that not only libraries are in charge of providing teaching aids to support university curricula but also faculty, administration and providers.The legislation and regulations of academic libraries’ collection development are analyzed in the historical context. The authors conclude that the libraries have to adapt to continuous changes and transformations building their strategies and priority system, identifying their mission in the ever-changing world.
International Society for Knowledge Organization. Forty years of cooperation
Authors: Sukiasyan E. R. 
Published: December 2018

The experience of the International Society for Knowledge Organization (ISKO), its tasks, current status, and main activities are discussed. The initiative of establishing ISKO belongs to Ingetraut Dahlberg, its first president. The part Russia takes in ISKO and that of the Russian ISKO section are discussed.The author analyzes the ISKO portal structure, the content of its main divisions illuminating the mission, elected bodies, its history, national sections, events in reversed chronology, and publications. The international Encyclopedia is one of the dynamic ISKO projects and a nonexhaustive digital resource; the entry on the Russia’s national classification system, namely BBK (Library Bibliographic Classification) was added to the Encyclopedia in 2017. The history of the project and the difficulties of editing text for foreign users are discussed. The information and scientific importance of publishing the BBK entry in ISKO Encyclopedia is stressed.The author concludes that, to cooperate efficiently with foreign colleagues, ISKO has to publish books, textbooks, monographs both in the Russian and English languages and to participate in IFLA activities.
Abstracting lexocigraphical works
Authors: Goncharova V. V. 
Published: December 2018

The increasing interest towards abstracting as a type of analytical and synthetical information processing due to science globalization trend, is emphasized. The professionals who study this primary information compression are bibliographers, linguists, and information specialists. The author argues that modern professors and students all have to and must learn abstracting in accordance with the international standards for scientific, research, reference and instructional works.The author points to the diversity of the national lexicographical studies and, based on the abstracts index obtained as a result of her study, characterizes the current trends in abstracting linguistic dictionaries. The key user groups are defined. Publishers’ abstracts of dictionaries are discussed and represented. The example of dictionary Internet-based abstract analysis is given (50 items). Based on the abstracts texts, main negative factors to impact information value of this secondary information source are revealed, that is: lacking data essential for users, incomplete description of targeted readership, etc.The author introduces a model plan for digital guides of Russian lexicographical works and complements the plan with the systematic aspect analysis. She concludes that abstracting is an intellectually intensive process. It is underexplored as far as lexicographical works are concerned, and offers many possibilities for further studies.
Nanosecond volume discharge in air initiated by a picosecond runaway electron beam
Authors: Mesyats G A , Yalandin M I 
Published: December 2018

Abstract
A voltage pulse with an amplitude of 250 kV and duration of 1ns was used to study discharge in atmospheric air. The discharge commences with the emergence of a field emission current from a cathode field enhancer. Next, a beam of runaway electrons with an amplitude of 0.5 – 1 A and duration of 10−11 s appears. Interaction between the beam and the voltage pulse was investigated using the reflectometry method. The discharge event was identified by the reversal of the reflected pulse polarity. If the emergence of the runaway electron beam is delayed by a time interval Δt
1, polarity inversion is delayed by the time Δ
t
2
= Δ
t
1
= 200 ps. This is due to the small discharge formation time, 33 ps, as a result of the large number (about 108) of runaway electrons that initiate the discharge. The time interval between the beginning of the discharge and the voltage inversion is no longer than 100 ps. This process is theoretically estimated based on the concept of multielectron initiation of discharge. It is shown that what is observed in the experiment is the nanosecond multielectron-initiation discharge produced by runaway electrons of the discharge itself.
Feasibility and acceptability of follow-up for prostate cancer in primary care: a pilot study
Authors: Heins Marianne , Schellevis François , Schotman Mirjam , van Bezooijen Bart , Tchaoussoglou Ismene , van der Waart Mirjam , Veldhuis Lilan , van Dulmen Sandra , Donker Gé , Korevaar Joke 
Published: December 2018

BackgroundThe number of patients with prostate cancer is increasing, which puts additional pressure on health care. GP-led follow up may help reduce costs, travel time for patients, and workload for urologists and improve continuity of care.AimTo test the feasibility and acceptability of a new clinical pathway for GP-led prostate cancer follow-up.Design & settingA feasibility pilot study was performed in cooperation with six GP practices in the Dutch region of Amersfoort.MethodThe study included 20 patients with prostate cancer in a stable phase, who were aged ≥65 years and with comorbidity. Follow-up for prostate cancer was transferred to the GP for one year. Participating GPs and urologists jointly developed a protocol. Patient satisfaction was measured at 0 and 12 months with the ‘personalised care’ subscale of the Consumer Quality (CQ) index 'general practice care'. Next, patients, GPs, and urologists were interviewed about their experiences. The clinical pathway was considered successful if no patients were referred back to the urologist, except for an increase in prostate-specific antigen (PSA), and if the majority of patients and participating urologists and GPs were satisfied.ResultsOf the 20 patients included in the study, three were referred back to the urologist because of increasing PSA levels and one died (unrelated to prostate cancer). Most patients (73%) were satisfied with the transfer of care, indicated by a score of ≥3 on the ‘personalised care’ subscale. GPs and urologists had confidence in the ability of GPs to provide follow-up care and preferred to continue this.ConclusionThe new clinical pathway was successful, warranting a larger study to provide evidence for the (cost-)effectiveness of GP-led prostate cancer follow-up.
Validating the C i 5052.17 Å/Mg ii 4481 Å Equivalent Width Ratio as a Diagnostic for F-type Lambda Boo Stars
Authors: Cheng Kwang-Ping , Tarbell Erik S. , Giacinto Anthony J. , Neff James E. , Romo Christopher A. , Gray Richard O. , Corbally Christopher J. , Johnson Dustin M. 
Published: December 2018

Abstract
The Lambda Boo-type stars are chemically peculiar stars with deficiencies of iron-peak elements but near-solar C, N, O, and S abundances. Since the prototype Lambda Boötis was first reported as peculiar, this group has been expanded from a small group of early A-type stars to a larger group of late B to early F-type dwarfs. Although a detailed abundance analysis that supports the Lambda Boo-like abundance pattern is the definitive confirmation of this Lambda Boo characteristic, the rapid rotation of many Lambda Boo stars generally limits how much detail can be derived from an abundance analysis. Traditionally, Lambda Boo candidates have been classified by visually examining the difference between their spectra and spectra of standard stars. Therefore, some ambiguity remains especially for mild or borderline Lambda Boo stars. This is the third paper in a series that establishes a straightforward yet reliable way to identify Lambda Boo-type stars. In previous papers, we identified line equivalent width (EW) ratios in the ultraviolet and visible regions that can distinguish Lambda Boo stars from other metal-weak stars. In this paper, we apply the visible line EW ratio diagnostic to 25 Lambda Boo candidates and carry out a detailed abundance analysis of HD 81290, an F2 star with a C i/Mg ii EW ratio in the range expected for Lambda Boo-type stars. Our elemental abundance analysis results confirm HD 81290's Lambda Boo membership and demonstrate the utility of our EW ratio as a diagnostic for cooler F-type Lambda Boo stars.
Hydrodynamic Simulations of Moonlet-induced Propellers in Saturn’s Rings: Application to Blériot
Authors: Seiß Martin , Albers Nicole , Sremčević Miodrag , Schmidt Jürgen , Salo Heikki , Seiler Michael , Hoffmann Holger , Spahn Frank 
Published: December 2018

Abstract
One of the biggest successes of the Cassini mission is the detection of small moons (moonlets) embedded in Saturns rings that cause S-shaped density structures in their close vicinity, called propellers. Here, we present isothermal hydrodynamic simulations of moonlet-induced propellers in Saturn’s A ring that denote a further development of the original model. We find excellent agreement between these new hydrodynamic and corresponding N-body simulations. Furthermore, the hydrodynamic simulations confirm the predicted scaling laws and the analytical solution for the density in the propeller gaps. Finally, this mean field approach allows us to simulate the pattern of the giant propeller Blériot, which is too large to be modeled by direct N-body simulations. Our results are compared to two stellar occultation observations by the Cassini Ultraviolet Imaging Spectrometer (UVIS), which intersect the propeller Blériot. Best fits to the UVIS optical depth profiles are achieved for a Hill radius of 590 m, which implies a moonlet diameter of about 860 m. Furthermore, the model favors a kinematic shear viscosity of the surrounding ring material of ν
0 = 340 cm2 s−1, a dispersion velocity in the range of 0.3 cm s−1 < c
0 < 1.5 cm s−1, and a fairly high bulk viscosity 7 < ξ
0/ν
0 < 17. These large transport values might be overestimated by our isothermal ring model and should be reviewed by an extended model including thermal fluctuations.
Long-term Spot Stability in the Post-common-envelope Binary QS Vir
Authors: Latković Olivera , Cséki Attila , Djurašević Gojko , Essam Ahmed , Hamed Amal S. , Youssef Shahenaz M. 
Published: December 2018

Abstract
We observed the post-common-envelope eclipsing binary with a white dwarf component, QS Vir, using the 1.88 m telescope of Kotammia Observatory in Egypt. The new observations were analyzed together with all multicolor light curves available online (sampling a period of 25 yr), using a full-feature binary system modeling software based on Roche geometry. This is the first time complete photometric modeling was done with most of these data. QS Vir is a detached system, with the red dwarf component underfilling its Roche lobe by a small margin. All light curves feature out-of-eclipse variability that is associated with ellipsoidal variation, mutual irradiation and irregularities in surface brightness of the tidally distorted and magnetically active red dwarf. We tested models with one, two, and three dark spots and found that one spot is sufficient to account for the light curve asymmetry in all data sets, although this does not rule out the presence of multiple spots. We also found that a single spotted model cannot fit light curves observed simultaneously in different filters. Instead, each filter requires a different spot configuration. To thoroughly explore the parameter space of spot locations, we devised a grid-search procedure and used it to find consistent solutions. Based on this, we conclude that the dark spot responsible for light curve distortions has been stable for the past 15 yr, after a major migration that happened between 1993 and 2002, possibly due to a flip-flop event.
Tracking Solar Phenomena from the SDO
Authors: Kempton Dustin J. , Schuh Michael A. , Angryk Rafal A. 
Published: December 2018

Abstract
This paper focuses on the problem of tracking solar phenomena by creating spatiotemporal trajectories from solar event detection reports. Though tracking of multiple objects in video sequences has seen much research and improvement in recent years, there has been relatively little focus on the domain of tracking solar phenomena (events). In this work, we improve on our previous endeavors by eliminating offline model training requirements and utilizing crowd-sourced human labels to evaluate our performance. We apply our method to the metadata of two solar event types spanning 4 yr of detection reports from the automated detection modules for the Solar Dynamics Observatory mission. We compare our results with those produced by the detection module for active regions and coronal holes by using a crowd-sourced trajectory database as the ground truth. We show that our results are as good as or better than the event-specific detection module for these two event types. This is especially promising because our tracking algorithm is a generalized module for all solar events, and not specific to a single event type, allowing it to be applied to other solar event types reported to the Heliophysics Event Knowledgebase that do not contain tracking information.
The Application of Autocorrelation SETI Search Techniques in an ATA Survey
Authors: Harp G. R. , Ackermann R. F. , Astorga Alfredo , Arbunich Jack , Barrios Jose , Hightower Kristin , Meitzner Seth , Barott W. C. , Nolan Michael C. , Messerschmitt D. G. , Vakoch Douglas A. , Shostak Seth , Tarter J. C. 
Published: December 2018

Abstract
We report a novel radio autocorrelation search for extraterrestrial intelligence. For selected frequencies across the terrestrial microwave window (1–10 GHz), observations were conducted at the Allen Telescope Array to identify artificial non-sinusoidal periodic signals with radio bandwidths greater than 4 Hz, which are capable of carrying substantial messages with symbol rates from 4 to 106 Hz. Out of 243 observations, about half (101) were directed toward sources with known continuum flux >∼1 Jy over the sampled bandwidth (quasars, pulsars, supernova remnants, and masers), based on the hypothesis that they might harbor heretofore undiscovered natural or artificial repetitive, phase or frequency modulation. The rest of the observations were directed mostly toward exoplanet stars with no previously discovered continuum flux. No signals attributable to extraterrestrial technology were found in this study. We conclude that the maximum probability that future observations like the ones described here will reveal repetitively modulated emissions is less than 5% for continuum sources and exoplanets alike. The paper concludes by describing a new approach to expanding this survey to many more targets and much greater sensitivity using archived data from interferometers all over the world.