bluuebunny/crossref_metadata_2025 huggingface dataset:
Overcoming standard quantum limit using a momentum measuring interferometer: publisher’s note
Authors: Davuluri Sankar , Li Yong
Published: March 2020

This publisher’s note contains corrections to Opt. Lett.
45, 1256 (2020)OPLEDP0146-959210.1364/OL.385092.
Simulación y obtención de combustibles sintéticos a partir de la pirólisis de residuos plásticos
Authors: Amar Gil Sebastian , Ardila Arias Alba Nelly , Barrera Zapata Rolando
Published: March 2020

La continua demanda de plásticos ha causado grandes acumulaciones de residuos en los vertederos, contribuyendo a problemas ambientales y de salud pública. En Colombia se genera anualmente cerca de 9,5 millones de toneladas de residuos sólidos, correspondiendo un 14% a materiales plásticos. La pirólisis es una técnica mediante la cual es posible remediar parte del problema, ya que permite recuperar energía y productos en forma de combustible líquido y gaseoso. En este trabajo se presenta la implementación y comparación de dos modelos en Aspen Plus para la simulación del proceso de pirólisis para la producción de combustibles líquidos a partir de diferentes tipos de residuos plásticos. Los modelos se basan en la minimización de la energía libre de Gibbs y mecanismos cinéticos de reacción. La simulación realizada calcula los rendimientos (% peso) y propiedades para cada corriente de producto dependiendo de las condiciones de operación. En comparación con datos de la literatura e información experimental recolectada en esta investigación, el modelo termodinámico mostró desviaciones mayores al 20%, mientras que con el modelo cinético los errores fueron ? 8%. De acuerdo a los resultados obtenidos, la producción de combustibles líquidos a partir de residuos plásticos se ve favorecida según la materia prima de la siguiente manera: poliestireno > polietileno de alta densidad ? polietileno de baja densidad > polietileno tereftalato.
Estudio exploratorio de arcilla expandida y piedra pómez como agregados en la producción de concretos ligeros
Authors: García Marín Fredy Mauricio , Güiza Galeano Robinson Arvey , Baquero Sanabria Brayan Armando
Published: March 2020

Esta investigación experimental se realizó con el objetivo de implementar materiales como la arcilla expandida (también conocida como arlita) y piedra pómez, como reemplazo total de los agregados convencionales en la producción de concreto. Los diseños de mezclas fueron desarrollados con arcilla expandida y piedra pómez totalmente saturados y sin saturar. La mezcla consistió de cemento, agua, piedra pómez y arcilla expandida, en algunas cosas se emplearon aditivos como fibras de polipropileno, humo de sílice y superplastificante, estos últimos se utilizaron para estudiar el incremento en la resistencia a la flexión y compresión del concreto. Para ello se elaboraron cilindros, viguetas y paneles; obteniendo densidades de 1.300 a 1.500 Kg/m3 y resistencias a la compresión de 13 a 18 MPa. Acompañados por ensayos de densidad de equilibrio para concretos ligeros, porcentaje de vacíos, absorción capilar y microscopia electrónica de barrido (SEM); con el fin de identificar algunas propiedades de los agregados y el concreto. De esta manera se puede demostrar que la arcilla expandida y la piedra pómez pueden considerarse como una alternativa a los agregados comunes en la producción de concreto en el país.
Valor percibido en instituciones de educación superior por parte de estudiantes de modalidad virtual
Authors: Serna Loaiza Diana Milena , Rojas Berrio Sandra Patricia , Robayo Pinzón Óscar Javier
Published: March 2020

El presente trabajo tuvo como objetivo evaluar las dimensiones del valor percibido por parte de los estudiantes de programas virtuales en Instituciones de Educación Superior, considerando la escala de valor percibido Perval. Método: Esta investigación se enmarcó a partir de un enfoque mixto, a través del cual se buscaba encontrar los aspectos y características particulares del valor percibido en estudiantes de programas virtuales de Instituciones de Educación Superior. El diseño de la investigación fue secuencial exploratorio, con la realización inicial de una entrevista semiestructurada presencial a 15 estudiantes de dos instituciones de Educación Superior colombianas que permitió evaluar las dimensiones del valor percibido y ajustar las afirmaciones o ítems correspondientes. Posteriormente, se diseñó y se aplicó una encuesta virtual con escala Likert, a 1569 estudiantes de programas virtuales. Las 7 dimensiones propuestas en la revisión de literatura del presente trabajo fueron incluidas dentro de la escala a evaluar: Valor Funcional; Valor Emocional, Valor Social, Valor Epistémico, Valor Condicional, Valor Espiritual, y Valor Ético. Resultados: El análisis factorial arrojó la identificación de 10 dimensiones, que incluyen además: Valor Ético-Condicional; Valor Socio-Emocional; Valor Ético-Funcional; Valor Ético-Social y Valor Ético Espiritual. Discusión: Los hallazgos de la presente investigación podrán servir de guía a las áreas que lideran procesos con estudiantes. Marketing, bienestar universitario, servicio y tecnología. Las altas directivas de las IES y las áreas académicas encontrarán información sobre lo que pondera un estudiante de educación virtual al momento de elegir un programa o una institución de educación superior y cuáles son los elementos del valor percibido más relevantes para éste, lo que sin duda ayudará a validar los fundamentos sobre los cuales se han emprendido las acciones dirigidas a la población estudiantil virtual y así desarrollar nuevas acciones con un conocimiento más profundo del valor percibido en estudiantes virtuales.
Preliminares
Authors: Contreras Cuentas Margarita María
Published: March 2020

pensamiento & gestión es una publicación semestral de la Escuela de Negocios de laUniversidad del Norte que pone al alcance del sector académico y productivo nuevasperspectivas en el área de la administración y resultados de investigacionesrealizadas eneste campo de estudio.pensamiento & gestión está incluida en el Index Nacional de Publicaciones Seriadasy Científicas y Tecnológicas de Colciencias –Publindex–, Categoría A2 (http://www.colciencias.gov.co/scienti/publindex/), hasta el primer semestre (enero-junio) del año2017 y en Redalyc: Red de Revistas Científicas de América Latina y el Caribe, España yPortugal (http://redalyc.uaemex.mx/); Clase: Citas Latinoamericanas en Ciencias Socialesy Humanidades; Latindex: Sistema Regional de Información en Línea para RevistasCientíficas de América Latina, el Caribe, España y Portugal (www.latindex.unam.mx); enla base de datos Ebsco y en el directorio Ulrichs.Se autoriza la reproducción total o parcial de su contenido siempre y cuando se cite la fuente.Esta publicación no se responsabiliza de los conceptos expresados por sus colaboradores.ISSN 1657 - 6276 (impreso)ISSN 2145-941X (on line)
Evaluación de la calidad percibida del servicio en un encuentro deportivo: caso de estudio un partido de fútbol
Authors: Álvarez Cano Ana Milena , Ospina Galindez Johann Alexis
Published: March 2020

En este trabajo se identificaron los factores determinantes de la calidad delservicio y sus efectos en el nivel de satisfacción de los espectadores de unpartido de futbol. A partir de la revisión de la literatura y el conocimientoempírico, se elaboró una escala de medición de veinticuatro ítems para la evaluación de la calidad percibida y tres ítems para la medición de los niveles de satisfacción. Las variables seleccionadas se validaron mediante el índice KMO, de modo que se obtuvo un valor significativamente bueno de 0,72. Luego, mediante el análisis factorial exploratorio, se agruparon las variables en cuatro factores de la calidad del servicio: infraestructura,presentación, servicio central y servicio al cliente. Finalmente, mediante el análisis factorial confirmatorio y la aplicación del modelo de regresión lineal múltiple se identifica que la infraestructura y el servicio al cliente son los factores determinantes de la satisfacción.
Cycling Performance Enhancement After Drop Jumps May Be Attributed to Postactivation Potentiation and Increased Anaerobic Capacity
Authors: de Poli Rodrigo A.B. , Boullosa Daniel A. , Malta Elvis S. , Behm David , Lopes Vithor H.F. , Barbieri Fabio A. , Zagatto Alessandro M.
Published: March 2020

de Poli, RAB, Boullosa, DA, Malta, ES, Behm, D, Lopes, VHF, Barbieri, FA, and Zagatto, AM. Cycling performance enhancement after drop jumps may be attributed to postactivation potentiation and increased anaerobic capacity. J Strength Cond Res 34(9): 2465–2475, 2020—The study aimed to investigate the effects of drop jumps (DJs) on supramaximal cycling performance, anaerobic capacity (AC), electromyography, and fatigue. Thirty-eight recreational cyclists participated into 3 independent studies. In study 1 (n = 14), neuromuscular fatigue was assessed with the twitch interpolation technique. In study 2 (n = 16), the AC and metabolic contributions were measured with the maximal accumulated oxygen deficit method and the sum of the glycolytic and phosphagen pathways. In study 3 (n = 8), postactivation potentiation (PAP) induced by repeated DJs was evaluated. The DJ protocol was effective for significantly improving cycling performance by +9.8 and +7.4% in studies 1 and 2, respectively (p ≤ 0.05). No differences were observed in electromyography between conditions (p = 0.70); however, the force evoked by a doublet at low (10 Hz) and high frequencies (100 Hz) declined for control (−16.4 and −23.9%) and DJ protocols (−18.6 and −26.9%) (p < 0.01). Force decline was greater in the DJ condition (p < 0.03). Anaerobic capacity and glycolytic pathway contributions were +7.7 and +9.1% higher after DJ protocol (p = 0.01). Peak force during maximal voluntary contraction (+5.6%) and doublet evoked force at 100 Hz (+5.0%) were higher after DJs. The DJ protocol induced PAP, improved supramaximal cycling performance, and increased AC despite higher peripheral fatigue.
Modeling of blood clot removal with aspiration Thrombectomy devices
Authors: Romero G. , Talayero C. , Pearce G. , Wong J.
Published: March 2020

Thrombectomy by aspiration is a highly effective method of accomplishing vessel recanalization. This study aims to obtain a mathematical model that allows the prediction of the dynamic response of a thrombus in response to different suction conditions, in order to avoid potential damage or the breakage of the clot during the interventional procedure. Virtual computing models have been created using Bond-Graph data and mass-spring Multi-Degree of Freedom equations. The model allows the use of tensile and torsion loads that could potentially be generated by the suction pressure together with different catheter geometries. The stress generated in the clot depends on its length and on its stiffness. The results obtained with the mathematical model are validated with a Finite Element Method (FEM) model, shows good agreement in terms of stress and elongation values. The results are consistent with previous Bond Graph models which indicated that the forces needed to extract a blood clot from an artery in in-vitro experiments are within the range used experimentally (~40-90 kPa). Qualitative experiments are undertaken with 3D printed scale prototypes and gelatin. The results are consistent with Computer Fluid Dynamic (CFD) simulations.
Vibrations analysis of combine harvester seat in time and frequency domain
Authors: Jahanbakhshi Ahmad , Ghamari Bahram , Heidarbeigi Kobra
Published: March 2020

Agricultural machineries as one of the main inputs in producing agricultural materials are associated with some problems on occupational health such as vibrations. At the lowest level, vibrations cause different diseases such as those affecting blood vessels, nerves, muscles, etc. The aim of this study was to determine and investigate the seat vibrations in John Deere 1055I combine harvester at different conditions. The experiments were carried out based on ISO 2631 and the Iranian standard number 14133. The tests were done at different engine revolutions and gear ratios with three replications. The collected data were analyzed considering factorial experiments based on completely randomized design. The results of variance analysis related to the effect of the main factors on combine seat vibrations showed a significant difference at the probability level of 1%. Effect of engine revolutions on vibration of the combine seat was higher than that of shifting gears. By calculating the allowable exposure time, there was concluded that for the first and second gears at the engine revolution of 1800 rpm and the first gear at the revolution of 2500 rpm, operators can easily drive the combine harvester for eight hours every day without any problems. The results of this study can be used to optimize the components affecting the vibration of the combine seat.
Performance and exhaust gases of a diesel engine using different magnetic treatments of the fuel
Authors: Arias Gilart R. , B. Ungaro M. R. , A. Rodríguez C. E. , F. Hernández J. F. , C. Sofia M. , D. Verdecia D.
Published: March 2020

In this research, different magnetic treatments were applied to diesel fuel using static magnetic fields of 0.36T of magnetic induction. The magnetic conditioners (MCs) were installed in different positions of the fuel lines in the engine and the magnetic treatment of the diesel was also carried out before introducing it into the engine tanks. The study was conducted using a four-stroke, two-cylinder, Lister Petter (LPWS2) engine with a compression ratio of 23.5:1 and a constant engine speed of 1500 rpm. The emissions of carbon monoxide (CO), carbon dioxide (CO2), oxygen (O2), nitrogen oxides and the temperature of the exhaust gases and the mass consumption of fuel were measured. The highest levels of reduction were achieved with the magnetic treatments that locate the MC directly in the engine's pipes. As the number of MC in the engine pipes increases, the emissions of polluting gases decrease. With the treatment that locates one MC in front of each injector, two MC at the entrance of the filter and two MC in the return of fuel were able to increase the O2 emissions by 6.9% and decrease the CO emissions in about 21.3% in the last load of the generator set. With this treatment a decrease in fuel consumption of 4.89% to 80% of engine load was obtained.
Turbulent kinetic energy and self-sustaining tones: Experimental study of a rectangular impinging jet using high Speed 3D tomographic Particle Image Velocimetry
Authors: Assoum Hassan Hasan , Hamdi Jana , El Hassan Mouhammad , Abed-Meraim Kamel , El Kheir M. , Mrach T. , El Asmar S. , Sakout Anas
Published: March 2020

Impinging jets are widely used in ventilation systems to improve the mixing and diffusion of airflows. When a rectangular jet hits a slotted plate, an acoustic disturbance can be generated and self-sustained tones produced. Few studies have looked at the Turbulent Kinetic Energy (TKE) produced by the aerodynamic field in such configurations and in the presence of self-sustaining tones. The aim of this work is to investigate the energy transfer between the aerodynamic and acoustic fields generated in a rectangular jet impinging on a slotted plate. The present paper methodology is based on experimental data measurements using 3D tomographic Particle Image Velocimetry (PIV) technique and microphones. It was found that the spectrum of the TKE for Re=5294 (configuration of self-sustained tones) is    which is smaller than that of the acoustic signal . A negative peak of correlation  is obtained between the acoustic signal and TKE for   These results may lead to conclude that the acoustic cycle should be covered by the TKE period and the two signals of both fields are in opposition of phase in order to obtain an optimal configuration for energy transfer.
Experimental study of the influence of glass cover cooling using evaporative cooling process on the thermal performance of single basin solar still
Authors: Shivamallaiah Manjunath Mallashetty , Kota Reddy S.V. , Shrikanth V , Shetty Gagan , Rakesh S. A. , Mary John Jinu , Ahmed Suhaib , Aftab Afnan
Published: March 2020

Acute shortage of drinking water has been on the rise owing to increasing population as well as shortage of drinkable water. Generation of potable water using passive solar stills is among the simplest and easier devices which make use of solar heat energy. However, the output of solar still is generally low owing to greater heat loss and needs improvement. In this paper, an experimental analysis is carried out to determine the performance of passive solar still with glass cover cooling using cold water generated using passive evaporative cooling process. The cold water required for cooling the glass cover is obtained using evaporative cooling process in the water tank which is wound with wet cotton cloth wick. The cold water thus obtained is sprayed onto the top surface of glass cover. The experiment is carried out in the outdoor conditions of Dubai from 10:00h to 14:00h and the temperature recordings of basin plate, glass cover, basin water, ambient air and cooling water are noted for every 30 minutes. The results reveal that the average increase in condensation heat transfer coefficient is found to be about 20.8% higher in the presence of glass cover cooling and the distillate output is found to increase by about 3.32 times. The average still efficiency is found to be relatively higher in the presence of cooling which is about 7.3% higher in the presence of cooling. The cold water temperature generated through evaporative cooling process is about 20.4% lower as compared to ambient temperature. Thus, the cooling of glass cover using cold water obtained through evaporative cooling process is found to be effective in enhancing the thermal performance of single basin solar still system.
Influence of tool offsetting and base metal positioning on the material flow of AA5052-AA6061 dissimilar friction stir welding
Authors: Ahmad Shah Luqman Hakim , Midawi Abdelbaset , Walbridge Scott , Gerlich Adrian
Published: March 2020

This study examines dissimilar friction stir welding of AA5052-AA6061 aluminum alloys with varying tool offsets. The base metals were positioned and fixed at a slight diagonal positioning such that varying tool offset position from the centreline can also be varied along the length of the weld. After the fabrication process, microstructural and mechanical property characterization was subsequently conducted. The results show that, above a certain threshold for tool offset, incomplete consolidation (i.e. kissing bond defects) will occur. Regardless of the base material positioning, a zero tool offset shows optimum intermixing in the stir zone. EDX mapping confirms the presence of a distinct interface between both materials in the stir zone region. However, enhanced material intermixing and better elongation are observed when AA6061 alloy is positioned at the tool advancing side.
The properties of slag-silica fume ternary blended mortar with quarry dust
Authors: Wee Kang Chow , Chee Ban Cheah , Chuan Wei Oo , Ken Part Wei , Heng Leow Khang
Published: March 2020

High carbon emissions of manufactured Portland cement in the concrete industry have incurred several interests in reducing the use of Portland cement by partially replacing it with supplementary cementitious materials. Most of which, are by-products from other manufacturing industries. Hence, the main purpose of this study is to investigate the effects of different combinations of ternary blended mortars incorporating supplementary cementitious materials such as Ground Granulated Blast Furnace Slag (GGBS) and Densified Silica Fume (DSF). In this study, mortars were prepared with 100% quarry dust and GGBS was replaced with DSF at 2% step increments up to 16% at a w/b ratio of 0.24. At the same time OPC content was fixed at 50%. The compressive and flexural strength, drying shrinkage, and porosity of mortars were all tested. The results indicated that the increasing DSF content increases; GGBS reduces the superplasticizer dosage for the desired workability of the mortar. The utilization GGBS and DSF has improved the performances ternary blended mortar incorporating quarry dust as a fine aggregate in terms of mechanical strength, drying shrinkage and total porosity tested. The high strength ternary blended mortar incorporating GGBS and DSF exhibited optimum mechanical and durability performance at the OPC:GGBS:DSF ratio of 50:38:12.
Human Capital Relation with Welfare in Indonesia and Asean Countries
Authors: Wibowo Muhammad Ghafur
Published: March 2020

The quality of human capital strongly determines the economic development of a country. Human capital can be shaped by the level of education and public health. This research analyzes the development and competition of human capital of Indonesia and other 5 ASEAN countries from 1985-2016. The problem of this study is whether human capital can be a significant determinant of economic welfare (per capita income) in ASEAN countries. The research used a regression analysis of panel data (all countries) and multiple linear regression (for each country). The independent variables are life expectancy, population growth rate, working-age population, and infant mortality rate per 1,000 live births. The results show that in general, all independent variables have a significant effect on GDP per capita. Nevertheless, an analysis in each country shows different levels and direction of influence. The quality of the human capital of Indonesia is still at the middle level among ASEAN countries. Therefore a variety of efforts to improve the quality of human capital needs to be done by the government and the people of Indonesia to win the competition between ASEAN countries.
Strategies for the Development of Earthenware Craft Business
Authors: Ismail Khafid , Prajanti Sucihatiningsih Dian Wisika , Widiyanto Widiyanto
Published: March 2020

This study aimed to design priorities of strategies for the development of earthenware craft business in Kasongan Tourism Village, Bantul Regency. To pursue this objective, the method used in this study was qualitative descriptive. Moreover, primary and secondary data were used in the data analysis of this study. The primary data were collected from the results of observation result, interviews, documentation, and questionnaires. Meanwhile, the secondary data were obtained from literatures, articles, journals, and internet websites related to the recent study. The technique of analysis used was Analytical Hierarchy Process (AHP). In this study, there were three criteria analyzed using AHP, namely the government policies, human resources, and institution. The results showed that the most prioritized criterion of the strategies for the development of earthenware craft business in Kasongan Tourism Village was the government policies with the weight value of 65 percent. The next criterion was institution with the weight value of 23 percent, and the last prioritized criterion was human resources with the weight value of 12 percent. From the calculation of AHP through expert choice 11 software, it was known that the results of inconsistency ratio was 0.035, meaning that the answers given by the key persons were consistent.
Implementasi Permendagri N0 113 Tahun 2014 dalam APBDesa
Authors: Pratama Athar Yaniar , Br. Sebayang Lesta Lesta Karolina
Published: March 2020

This study aims to  examine and find out the implementation of Permendagri No. 113 of 2014 in Ngesrepbalong Village, Limbangan, Kendal Regency and  analyze the obstacles faced by village officials in its implementation.This study uses a qualitative approach with a case study research strategy. Data obtained through interviews and documentation studies.The results of the study show the Implementation of Permendagri No. 113 of 2014 in Ngesrepbalong Village can generally be seen from the following findings: Fund allocation is not appropriate in accordance with the provisions;  There is a discrepancy between the list of program activities that have been agreed upon in the village meeting with the details of the activities contained in the RKP table; There is an RKP that does not include a discussion on the evaluation of the previous year's financial use;  in the aspect of transparency, the Village Government has implemented it by informing the allocation of funds and the development of their use on information boards in the village office.

Penelitian ini bertujuan untuk mengkaji dan mengetahui implementasi Permendagri No 113 tahun 2014 di Desa Ngesrepbalong Kecamatan Limbangan Kabupaten Kendal dan menganalisis kendala yang dihadapi aparatur desa dalam pelaksanaannya.Penelitian ini menggunakan pendekatan kualitatif dengan strategi penelitian studi kasus. Data yang diperoleh melalui wawancara dan studi dokumentasi. Hasil penelitian menunjukkan Implementasi Permendagri No 113 tahun 2014 di Desa Ngesrepbalong dapat dilihat dari temuan berikut ini:  Pengalokasian dana tidak tepat sesuai dengan ketentuan; Adanya ketidaksesuaian antara daftar program kegiatan yang telah disepakai dalam musyawarah desa dengan rincian kegiatan yang ada dalam tabel RKP; Terdapat RKP yang tidak mencantumkan pembahasan mengenai evaluasi penggunaan keuangan tahun sebelumnya; pada aspek trasnparansi, Pemerintah Desa telah melaksanakannya dengan menginformasikan pengalokasian dana dan perkembangan penggunaannya pada papan informasi di kantor desa.
Effectivity and Efficiency of Regional Property Management Results and Financial Performance
Authors: Thafaki Tasyaa'u Mulka
Published: March 2020

The purpose of this research to determine the level of efficiency and results that reflect the performance and financial performance of BUMD in Semarang City, period  2014-2016. The type of data used is secondary data, using data analysis through DEA analysis and interview method. The results showed that PDAMs and RPH & BPH in 2014 still met the level, with a value of 82.4% and 62.6%. In 2015, as a whole, BUMD has achieved the value of efficiency and effectiveness. In 2016 RPH & BPH companies have not been able to reach the level of 8.1%. The level of appeal in the 2014 and 2015 BPR BKK will jointly achieve a joint achievement level of 89.5% and 93.8%. Using a comprehensive annual calculation of BUMD has reached the level of effectiveness with a value of 100%.

Tujuan penelitian ini untuk mengetahui tingkat efisiensi dan hasil yang mencerminkan kinerja dan kinerja keuangan BUMD di Kota Semarang, periode 2014-2016. Jenis data yang digunakan adalah data sekunder, menggunakan analisis data melalui analisis DEA dan metode wawancara. Hasil penelitian menunjukkan bahwa PDAM dan RPH & BPH pada tahun 2014 masih memenuhi level, dengan nilai 82,4% dan 62,6%. Pada 2015, secara keseluruhan, BUMD telah mencapai nilai efisiensi dan efektifitas. Pada 2016, perusahaan RPH & BPH belum dapat mencapai level 8,1%. Tingkat banding di BPR BKK 2014 dan 2015 akan bersama-sama mencapai tingkat pencapaian bersama sebesar 89,5% dan 93,8%. Menggunakan perhitungan tahunan BUMD yang komprehensif telah mencapai tingkat efektifitas dengan nilai 100%.
VERİ MADENCİLİĞİ YAKLAŞIMI İLE TELEKOMUNİKASYON SEKTÖRÜNDE ARIZA GİDERME ANALİZİ
Authors: ORALHAN Burcu
Published: March 2020

Telekomünikasyon operatörleri tarafından sunulan hizmetlerde problem veya arıza ile karşılaşılmasının yanı sıra meydana gelecek bu tür olumsuzlukların giderilememesi, müşteri güvenini azaltmakta ve sonuç olarak gelir kaybına yol açmaktadır. Veri madenciliği, telekomünikasyon endüstrisinde mevcut verilere ilişkin analizler sayesinde geliştirilmiş bilgiyi sağlayabilmektedir. Bu çalışmada, Türkiye’de telekomünikasyon sektöründe yer alan öncü bir firmanın mobil ağlarında sorun giderme süreçlerine veri madenciliği süreci uygulanmıştır. Bu kapsamda Mart-Mayıs 2019 tarih aralığında elde edilen 4032 veri ön işleme süreci sonucunda 3748 örneklem olarak analize dahil edilmiştir. Arıza kaydı sürecinde kayıt altına alınan Arıza Merkezi, İş Emri, Ekip Numarası, Hizmet Türü, Hizmet Süresi, Şikâyet Türü ve Sonuç verilerinden oluşan 7 farklı değişken incelenmiştir. Elde edilen sonuçlara göre J48, PART ve Multilayer Perceptron sınıflandırıcılarının veri kümesinde daha iyi performans gösterdiği görülmüştür. Süreçlerin etkin bir şekilde kontrol etmesini sağlamada arıza giderme analizlerinde yol gösterici bir çalışma olması bakımından önem arz etmektedir.
YENİ BİR RİSK DEĞERLENDİRME YÖNTEMİ İLE TERSANE İŞLETMELERİNİN SINIFLANDIRILMASI
Authors: CANER AKIN Güfte , EREN Özge , ORAL Hasan Volkan , HEPERKAN Hasan Alpay
Published: March 2020

Gemi inşa sektörü karmaşık yapısı ile yüksek alanlarda çalışma, tehlikeli kimyasallar kullanımı gibi özelliklerinden dolayı iş sağlığı ve güvenliği açısından önemli riskler barındırmaktadır. Ülkemizdeki risk analiz yöntemlerinin genellikle uzman görüşlerine dayanması nedeniyle aynı konuda farklı sonuçlar ortaya çıkabilmektedir. Bu nedenle tersaneler için gerçekçi ve tutarlı bir risk analiz yöntemine ihtiyaç vardır. Yapılan bu çalışma ile tersanelerin iş sağlığı ve güvenliği risk analizinde kullanmak maksadıyla Çok Kriterli Karar Verme (ÇKKV) yöntemi dikkate alınarak bir analiz yöntemi oluşturulmuştur. Çalışmada Analitik Hiyerarşi Süreci (AHP) katsayıları L-Tipi (5x5) Risk Değerlendirme Matrisi’ne (RADM) dahil edilmiştir. Çalışma sonucunda tersanelerin risk analizi için mevcut her bir tehlikenin riskini ve genel risk seviyesi ortaya koyacak gerçekçi bir yöntem geliştirilmiştir. Böylece tersaneler arasında karşılaştırma ve sıralama yapılabilmesine imkân tanınmıştır.
TÜRKİYE İLE AB’YE SON KATILAN ÜLKELERİN AR-GE PERFORMANSLARININ CRİTİC AĞIRLIKLI MAUT VE SAW YÖNTEMİYLE KIYASLANMASI
Authors: ORHAN Mehmet , AYTEKİN Mehmet
Published: March 2020

Küreselleşmeyle beraber bilgi ve iletişim teknolojileri alanındaki gelişmelerin etkisiyle günümüz ekonomileri yoğun bir rekabet ortamıyla ile karşı karşıyadır. Bu yoğun bir rekabet ortamıyla başa çıkılabilmesi için ülkelerin, araştırma geliştirme (Ar‐Ge) faaliyetlerine geçmiştekinden daha fazla önem vermeleri ve işletmelerin Ar‐Ge faaliyetlerini teşvik etmeleri gerekmektedir. Böylelikle nitelikli ürünler üretilebilecek ve katma değer sağlanabilecektir. Bu noktadan hareketle çalışmada; ülkelerin AR-GE performanslarının karşılaştırılmasında kullanılan kriterlerin önem derecelerinin belirlenmesi ve Türkiye ile Avrupa Birliği’ne son katılan 13 üye ülkenin (Slovenya, Çekya, Malta, Polonya, Kıbrıs, Estonya, Hırvatistan, Slovakya, Letonya, Macaristan, Bulgaristan, Romanya ve Litvanya) AR-GE performansının kıyaslanması amaçlanmıştır. Bu amaçla yapılan literatür taraması sonucunda; ülkelerin AR-GE performansının karşılaştırılmasında yaygın olarak kullanılan kriterler tespit edilmiştir. Kriterlerin göreli ağırlıkları (önem dereceleri) CRİTİC yöntemiyle belirlenmiştir. Daha sonra MAUT ve SAW yöntemiyle AR-GE performanslarına göre ülkeler sıralanmıştır. Yapılan analiz sonucunda elde edilen bulgulara göre, Ar-Ge performansı açısından Türkiye'nin birinci sırada yer aldığı tespit edilmiştir.
HASTANE ÇALIŞANLARINDAKİ İŞ STRESİNİN İŞTEN AYRILMA NİYETİ ÜZERİNDEKİ ETKİSİ
Authors: ÇANKAYA Muhammet
Published: March 2020

Bu çalışmada Ankara ilindeki bir özel hastanede çalışanların iş stresi ve işten ayrılma niyeti düzeyleri, yaşadıkları iş stresi ile işten ayrılma niyetleri arasındaki ilişki ve iş stresinin işten ayrılma niyeti üzerindeki etkileri incelenmiştir. Çalışmanın amacı doğrultusunda, Ankara ilinde sağlık sektöründe faaliyet gösteren bir özel hastanede çalışan 256 kişiye anket uygulanmıştır. Yapılan analizler sonucunda çalışanlar iş stresinde; 1,49, işten ayrılma niyetinde ise; 2,50 ortalama değerlerine sahiptir. Fark testleri sonucunda; cinsiyet, medeni durum, yaş grubu, eğitim düzeyi, aylık gelir düzeyi, meslek, mesleki deneyim süresi ve kurumdaki deneyim süresi değişkenlerine göre çalışanların iş stresi düzeylerinde anlamlı farklılıklar bulunurken, mesleği seçme nedeni değişkenine göre anlamlı bir farklılık bulunamamıştır. Çalışanların işten ayrılma niyetlerinde ise; cinsiyet, medeni durum, yaş grubu, eğitim düzeyi, mesleki deneyim süresi, kurumdaki deneyim süresi ve mesleği seçme nedeni değişkenlerine göre anlamlı farklılıklar bulunurken, aylık gelir düzeyi, meslek değişkenlerine göre anlamlı bir farklılık bulunamamıştır. Pearson korelasyon analizine göre; iş stresi ve işten ayrılma niyeti arasında pozitif yönde anlamlı bir ilişki bulunmuştur (0,495). Son olarak iş stresinin işten ayrılma niyeti üzerinde anlamlı bir etkisinin olduğu ve çalışanların işten ayrılma niyetlerinin %24,5 oranında iş stresi ile açıklanabildiği tespit edilmiştir.
PAZARLAMA FIRSATI OLARAK AKILLI TURİZM: KUŞADASI ÖRNEĞİ
Authors: YAZICI AYYILDIZ Ahu , AYYILDIZ Tuğrul
Published: March 2020

İnsan yaşamını kolaylaştıran teknolojik gelişmelerle birlikte akıllı şehir, akıllı turizm, akıllı otel gibi kavramlar ortaya çıkmıştır. Bu çalışmanın amacı Kuşadası’nın akıllı turizm potansiyelini incelemek, bu alanda yapılan çalışmaları belirleyip, turizm paydaşlarının akıllı turizm modelinin Kuşadası’nda uygulanabilirliği üzerine fikir ve değerlendirmelerini öğrenmektir. Çalışma kapsamında akıllı şehir, akıllı turizm ve akıllı otel kavramlarına ilişkin literatür bilgisi verilmiş, dünyada ve Türkiye’de bu konuyla ilgili yapılan uygulamalara değinilmiştir. Sonrasında 6 tane otel yöneticisi, 4 tane profesyonel turist rehberi, 3 tane seyahat işletmesi yöneticisi, Kuşadası Belediyesi ve Kuşadası Ticaret Odası yöneticileri olmak üzere toplam 15 kişiyle yarı yapılandırılmış görüşme tekniği kullanılarak araştırma bulguları elde edilmiştir. Çalışmadan elde edilen veriler betimsel analize tabi tutulmuştur. Çalışma sonuçlarına göre, Kuşadas’nın akıllı şehir olma yolunda henüz yolun çok başında olduğu tespit edilmiştir. Bu konuda Kuşadası Belediyesi tarafından çok fazla plan, proje geliştirilmediği, daha çok otel işletmeleri, seyahat işletmeleri tarafından akıllı turizm uygulamalarının kullanıldığı ortaya çıkmıştır.
FİLM VE DİZİLERİN ABONELİK TEMELLİ İZLEME MOTİVASYONLARI ÜZERİNE NİTEL BİR ÇALIŞMA: NEDEN SVOD?
Authors: PARMAKSIZ Mehmet Yalçın , KIRÇOVA İbrahim
Published: March 2020

İnternete erişen kullanıcı sayısının her geçen gün artması ve bulut teknolojilerinin yaygınlaşması eğlence sektöründeki içeriklerin tüketimini de etkilemiştir. Aboneliğe dayalı talebe bağlı video (SVOD) olarak adlandırılan ve internet üzerinden akış şeklinde sunulan Netflix ve benzeri markaların video içerikleri sayesinde, birçok kullanıcının tercihi televizyon ve sinemadan SVOD platformlarına kaymıştır. Türkiye’de de 1,5 milyondan fazla abone sayısına sahip olduğu tahmin edilen SVOD servisleri sayesinde korsan servislerle film ve dizi içeriğine erişen kullanıcı sayısında da azalmalar görülmüştür. Araştırmamızda, tüketicilerin aylık abonelik ücretleri ödeyerek, akış yöntemiyle veya çevrimdışı erişim sağladığı SVOD servisleri üzerinden ücretli izleme motivasyonları incelenmektedir. Kalitatif araştırmalardaki veri toplama yöntemlerinden odak grup görüşmeri kullanılarak içerik analiz yapılmış, böylece SVOD servislerinin kullanım niyetine etki eden faktörlere cevap aranmıştır. Tüketicilerin SVOD kullanım motivasyonları algılanan içerik kalitesi, çaba beklentisi, fiyat algısı, hazcı güdülenme ve algılanan faydalılık olmak üzere 5 ana tema altında incelenmiştir.
Gender pay transparency mechanisms: Future directions for South Africa
Authors: Bosch Anita , Barit Shimon
Published: March 2020

The gender pay gap – that is, the difference in wages between men and women for the same or substantially the same work, or work of equal value – still features prominently as a stumbling block in achieving South African gender equality. If South Africa is to dislodge its stagnant gender pay gap, especially for women in the middle and upper levels of the wage distribution, pay transparency – making gender differences in wages known to employees, government and the public – can compel employers to remunerate fairly and equally. We undertook a comparison between the global and national mechanisms of gender pay transparency to propose a way forward to increase transparency in gender pay for South Africa. In addition to a discussion of existing mechanisms, a summary of the gender pay transparency mechanisms of 16 countries is provided as supplementary material to the article. We found that South Africa could strengthen legislated transparency mechanisms, especially with regard to pay reporting and pay audits, provided that sanctions are attached to non-delivery of these duties. Reigniting the debate on strengthening and improving South African legislation and interpretation of existing governance codes in relation to the implementation, monitoring and enforcement of gender pay transparency mechanisms could strengthen the existing collective bargaining framework and provide the impetus to demonstrate that South Africa sees gender equality as an achievable reality, not an improbable ideology.
Sciarid pests (Diptera: Sciaridae) from undercover crop production in South Africa
Authors: Katumanyane Agil , Kanzi Aquillah M. , Malan Antoinette P.
Published: March 2020

Fungus gnats (sciarids) are among the most important pests in undercover crop production. They cause direct physical damage to plant roots, transfer fungal pathogens and create entry points for soil-borne plant pathogens. In 2007, Bradysia impatiens, an important fungus gnat pest was found in association with major tree nursery beds in the Mpumalanga and KwaZulu-Natal Provinces of South Africa and was considered invasive. In this study, eight greenhouses were surveyed in the Western Cape Province and B. impatiens was found to be present in all the greenhouses. Similar to the results of the previous studies, a high haplotype diversity was identified for B. impatiens, which may indicate multiple strain introductions into South Africa. Two  other fungus gnat species, Lycoriella sativae and Lycoriella ingenua – globally important sciarid pests of mushroom cultures – were identified as new from South Africa. Through a laboratory culture, the life cycle of B. impatiens was observed to be approximately 21 days at 25 °C. Females laid between 100 and 250 eggs. Possible introduction sources include contaminated vegetative material and growth media, thus there maybe need to revise the importation restrictions on these commodities. The identification of two novel species of sciarid pests that have only previously been identified in the Holarctic region could further emphasise this need. However, the recent discovery of such high sciarid diversity could also be due to only a few studies having been previously done on sciarid pests in South Africa.

Significance:

The fungus gnat species Bradysia impatiens is reported as present in several undercover crops in the Western Cape Province of South Africa, including cucumbers, tomatoes, chrysanthemums, mushrooms, blueberries and various herbs.

Lycoriella ingenua and Lycoriella sativae were also found to be present in mushroom gardens – the first report of Lycoriella from the Afro-tropical region.

The three fungus gnat species are some of the most important sciarid pests in undercover crop production worldwide. This study highlights the need for more studies on the distribution of these sciarids and possible invasion history.

Open data set:

https://www.ncbi.nlm.nih.gov/popset?DbFrom=nuccore&Cmd=Link&LinkName=nuccore_popset&IdsFromResult=1654675097
ESTILOS EDUCATIVOS E INTELIGENCIA EMOCIONAL EN DOCENTES DE INSTITUCIONES EDUCATIVAS CRISTIANAS DE LA CIUDAD DE JULIACA
Authors: Farceque Huancas Santos Armandina, , Minaya Herrera María Elizabeth
Published: March 2020

El objetivo de la presente investigación fue determinar la relación que existe entre los estilos educativos y la inteligencia emocional en docentes de instituciones educativas cristianas de la ciudad de Juliaca. La metodología implica el estudio de tipo correlacional, de diseño no experimental y de corte transversal; siendo la población 150 docentes, con una muestra de 100. Para la medición de las variables se usó dos instrumentos de medición: uno sobre Perfil de estilos educativos y el Inventario de inteligencia emocional. Los resultados indican una correlación directa y significativa entre los estilos educativos y la inteligencia emocional a nivel moderado (Rho: 0.492) que viene a ser estadísticamente significativo (p=0.006). Entre el estilo educativo sobreprotector y la inteligencia emocional, se halló una correlación negativa de magnitud baja (Rho = -0.242) la cual a su vez es estadísticamente significativa (p=0.015). Entre el estilo educativo punitivo y la inteligencia emocional, se observa una correlación indirecta de nivel bajo (Rho= -0.334 que es estadísticamente significativa (p=0.001). Entre el estilo educativo inhibicionista y la inteligencia emocional, se halló un grado de asociación muy bajo e indirecto (Rho=-0.102), sin embargo, esta no es estadísticamente significativa (p=0.314). En conclusión, se encontró que existe una correlación positiva entre estilos educativos y la inteligencia emocional en docentes de instituciones educativas cristianas. Asimismo, se evidenció una relación de medianamente desarrollada y estadísticamente significativa, lo que implica que, en cuanto existe mayor prevalencia de algunas de las variables como estilos educativos e inteligencia emocional, estapresenta la tendencia a generar actitudes favorables al momento de asumir la responsabilidad de docentes y tener estrategias claras para una buena metodología con el estudiante.
Caspase-Glo 3/7 assay v1
Authors: Goulding Leah
Published: March 2020

Caspase-Glo® 3/7 Assay System used for measuring cyto-toxicity of compounds of interest.
CCM - Sanger Standard Sequencing v1
Authors: Benedetti Valerio
Published: March 2020

After identification of familial Cerebral Cavernous Malformation disease, gDNA should be sequenced in order to confirm pathological phenotype. To do this, set up a sequencing reaction as outlined below. Perform PCR on gDNA using the following TouchDown Protocol (15uL reaction). The PCR amplicon size should be between 200-500 bp. Add reagents in desired order (best gold is to add the polymerase and gDNA last). Name Volume (µL) - 1 sample Milli-Q H2O 8.44 µL Buffer 5X 3 µL 10mM dNTPs 0,3 µL Primer F (10µM) 0.1 µL Primer R (10µM) 0.1 µL KAPA2G Fast HotStart DNA Polymerase (5 U/μL) 0,06 µL Total 12 µL Touch down phases (pre-heating - denaturation, annealing, extension): Phase Cycles Temperature Time Pre-heating 1 94 °C 4 minutes Denaturation 14 94 °C 15 seconds Annealing 64°C - 0,5°C/ cycle 15 seconds Extension 72 °C 1 minute Denaturation 10 94 °C 15 seconds Annealing 57 °C 15 seconds Extension 72 °C 1 minute Denaturation 1 94 °C 15 seconds Final extension 1 72 °C 1 minute Hold 1 4 °C hold Run aof amplificate mixed with Xilene Cianolo (for each samples) on a 2% gel to determine presence of PCR product and. Thesize of PCR product can be determined with molecular-weight size marker Run product on 2% gel at 120 Volt Image gel and save image with relative informations. It is important to confirm the presence of PCR product(s). Sequencing reaction protocol below: DNA purification with esonuclease enzyme: Name Volume (µL) - 1 sample ExoStar enzyme 1 µL PRC product 2,5 µL Total 3,5 µL Cycles Temperature Time 1 37°C 25 minutes 1 80°C 15 minutes 1 4°C hold Prepare samples for sequencing. Sequencing reaction protocol below: Name Volume (µL) - 1 sample Name Volume (µL) - 1 sample Milli-Q H2O 6 µL Milli-Q H2O 6 µL Primer F 12,3pm/µL 1 µL Primer R 12,3pm/µL 1 µL BigDye (enzyme) 0,5 µL BigDye (enzyme) 0,5 µL BigDye Terminator Buffer 1,5 µL BigDye Terminator Buffer 1,5 µL Total 9 µL Total 9 µL Phase Cycles Temperature Time Pre-heating 1 96°C 1 minute 26 96°C 10 seconds 50°C 5 seconds 60°C 4 minutes 1 4°C hold
Protocol for whitefly genetic analysis v2
Authors: Nwezeobi Joachim , Onyegbule Onyeyirichi , Nkere Chukwuemeka , Onyeka Joseph , van Brunschot Sharon , Seal Susan , Colvin John
Published: March 2020

Bemisia tabaci(sensu latu) is a group of >40 highly cryptic whitefly species that are of global agricultural importance, both as crop pests and plant-virus vectors. This protocol outlines the process for extracting genomic DNA from B. tabaci whiteflies and the steps taken in analysing the DNA sequences for identifying the identities of the whiteflies collected in eastern Nigeria
Assessing Competitiveness of Forest Industry: Theoretical and Empirical Aspects
Authors: Gordeev Roman V.
Published: March 2020

Numerous studies are dedicated to the competitiveness assessment of countries, regions and industries. However, it is not easy to choose the methodology to assess the competitiveness of forest products. The main difficulties arise even at the stage of defining the term “competitiveness”, selecting the criteria for its achievement and choosing the measure suitable for its evaluation. This article analyzes the theoretical foundations of competitiveness in terms of two main approaches: comparative and competitive advantages. The main novel result of this work is a comprehensive review of empirical competitiveness assessments as regards the forest industry. Several methods have been identified as the most popular means to explore forest products’ competitiveness. One of the most convenient approaches to estimate competitiveness at national and regional level is to calculate the comparative advantage revealed. The last section of the article covers benefits and disadvantages of this approach
Tools to Build Their Best Learning: Examining How Kindergarten Teachers Frame Student Mistakes
Authors: DONALDSON MALEKA
Published: March 2020

In this portrait, Maleka Donaldson vividly illustrates how two teachers in real-world, public school settings convey their expectations for kindergarten student performance and set the tone for learning from mistakes and feedback. Research in psychology and education has established the benefits of corrective feedback on learning but has not closely examined how practicing teachers respond to mistakes made by young children during day-to-day instruction. Donaldson draws on extended observations of teacher-student interactions to juxtapose the two contexts and reveal divergent techniques that the participating teachers use to frame mistakes and correct answers during instruction. She compares these variations and considers how each teacher's pedagogical tools could be integrated into a mistake-response toolkit that could fundamentally reshape learning from mistakes for kindergarteners.
State Takeover: Managing Emotions, Policy Implementation, and the Support/Sanction Duality in the Holyoke Public Schools Receivership
Authors: FRIED SIMONE A.
Published: March 2020

In this portrait, Simone A. Fried investigates the first six months of a state education department's takeover of a public school district. Using interviews, observations, and artifact analysis, the article explores how school district employees experience the significant reorganization of governance structures and policies that accompanies receivership, illustrating the challenges of managing the “human side” of reform, particularly during the chaotic initial period of a new initiative. The portrait highlights a tension inherent to takeover policy: the state's dual role in providing both support and sanction generates fear and uncertainty in the very communities where they must also build trust, vision, and motivation for change.
REACT+G Öğretim Yaklaşımına Yönelik Bir Eylem Araştırması: “Thales Paralellik İlkesi”
Authors: YURTYAPAN Mehmet İhsan , TAPAN BROUTIN Menekşe Seden , KALELİ YILMAZ Gül
Published: March 2020

Bu çalışmanın amacı, REACT öğretim stratejisine farklı bir alternatif olarak önerilen REACT+G öğretim stratejisine göre “Thales Paralellik İlkesi” konusunun öğretimine yönelik hazırlanan uygulamaların öğretim sürecine yansımalarını incelemektir. Çalışmada nitel araştırma yöntemlerinden eylem araştırması yöntemi kullanılmıştır. Çalışmanın örneklemini 11. Sınıfta öğrenim gören 10 lise öğrencisi oluşturmaktadır. Çalışma grubu, kolay ulaşılabilir örnekleme yöntemiyle belirlenmiştir. Gözlem, video-ses kaydı ve öğrenci çalışma kâğıtları yoluyla elde edilen verilerin analizinde içerik analizi kullanılmıştır. Araştırmada önerilen +G “Genelleştirme Aşaması” REACT öğretim stratejisinden faklı olarak öğretmene, öğrencilerin eksiklerini yapılandırmacı öğrenme yaklaşımına uygun bir şekilde giderme imkânı vermiştir. REACT+G öğretim stratejisinin etkilerinin incelenmesi amacıyla araştırmacılara farklı kademelerde yapılacak deneysel çalışmalar önerilmektedir.