bluuebunny/crossref_metadata_2025 huggingface dataset:
Análisis de variables relevantes para la promoción del léxico y el desempeño académico en estudiantes de primer año de nivel superior
Authors: Zapico Martín Gonzalo , Degregori Lucía , Berardo Itatí
Published: November 2020

Academic performance is a multivariate phenomenon of complex analysis. Among the multiple causes that have been studied, lexicon stands out as an interesting variable since, in addition to being explanatory, it is a skill that can be trained and reinforced in a relatively short time. Given this situation, in this paper we proposed to analyze which variables are the most important in terms of a high score in a lexical test. We analyzed age, sex, school origin, maximum schooling reached parents and reading habits in 200 freshmen from different majors at Universidad Nacional de Mar de Plata, Argentina and Universidad Nacional de San Luis, Argentina in the year 2019. The results indicate that the variable that has the greatest incidence in statistical terms is that of reading habits, which means that it is necessary to promote this practice from primary and secondary levels.
La didáctica como proceso de enseñar y evaluar el aprendizaje
Authors: Ortiz Ocaña Alexander , Salcedo Barragán Mileidy
Published: November 2020

The concept of pedagogy, the subject of pedagogy and pedagogy as a science, discipline, knowledge, and reflection have been studied by many authors in all continents. This approach includes the traditions of Germany, France, The United States, and Latin America. The conceptions of pedagogy that have been established throughout the history of education differ in the various regions and countries. That is why a thorough, detailed, and profound analysis of the notion of the epistemic configuration of pedagogy requires taking into account not only its own epistemic dimension but also its geographical dimension. In this article, the authors reflects on teaching as the process to teach and assess learning. It is assumed that teaching means allowing learning. From this point of view, a teacher must excite, seduce, welcome, and inspire. This article ends with a maxim: tell me how you evaluate, and I will tell you how to teach.
Characterization of nano-bio silicon carbide
Authors:   Yeoju Institute of Technology (Yeoju University), 338, Sejong-ro, Yeoju-eup, Yeoju-gun, Gyeonggi-do, 469-705 Korea, Vlaskina S.I. , Mishinova G.N. ,   Taras Shevchenko Kyiv National University, 64, Volodymyrs’ka str., 01033 Kyiv, Ukraine, Shaginyan I.L. ,   Seoul National University SNUSD, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea, Smertenko P.S. ,   V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, 41, prospect Nauky, 03680 Kyiv, Ukraine, Svechnikov G.S. ,   National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37, Peremohy Ave., Kyiv, Ukraine
Published: November 2020

Plasma-enhanced chemical vapor deposition, reactive magnetron sputtering, hot-wire chemical vapor deposition and radio frequency plasma-enhanced chemical vapor deposition were used to develop technology for preparation of nano-bio silicon carbide coating of ceramic materials for dental applications. The effect of the bias voltage applied to the ceramic prostheses and dental crowns on the crystallization processes have been recognized. The optimal bias voltage applied to conductive substrate was –200 V, whereas for dielectric substrate the bias voltage Vbias did not affect the properties of SiC coating. The analysis of CVCs and spectroscopic diagnostics as the methods for studying the mechanism of interfacial rearrangements to investigate SiC phase transition in nano silicon carbide coatings were used. The conductivity of the SiC coating coincided with the conductivity on the dielectric (µn0 = 1012…1013 сm–1·s–1·V–1). The conductive substrate had a significant effect on the properties of the coating and thus depended on the bias voltage Vbias. The conductivity increased by three-four orders of magnitude (µn0 = 3·1017 сm–1·s–1·V–1), if the bias voltage Vbias = –200 V. The increase of the bias voltage (Vbias = –600 V) led to a decrease in the conductivity (µn0 = 1011…1012 сm–1·s–1·V–1). It was found that there was the double injection regime with bimolecular recombination in this structure with the dependence I = V3/2 for CVCs of SiC. The luminescence spectrum of SiC coating on non-dielectric ceramics (if Vbias = – 200 V during deposition) was significantly different from the luminescence spectrum of SiC coating on dielectric ceramics. Increasing the applied voltage to the substrate Vbias during deposition led to increasing the fraction of hexagonal polytypes. Directions in the crystal lattice according to the photoluminescence spectra were identified from the comparing the values of the width of the non-phonon parts of stacking faults and deep level spectra in the low-temperature photoluminescence with arrangements of atoms in the SiC lattice structure. The displacement of each atom participating in photoluminescence allowed to find the correlation with technology of SiC deposition and to develop technology of SiC coating on the dental materials.
Elastic properties of CdTe1–xSex(x = 1/16) solid solution: First principles study
Authors:   Lviv Polytechnic National University, Department of General Physics Bandera str. 12, 79646 Lviv, Ukraine, Ilchuk H.A. , Korbutyak D.V. ,   V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine 45, prospect Nauky, 03680 Kyiv, Ukraine, Kashuba A.I. ,   Lviv Polytechnic National University, Department of General Physics Bandera str. 12, 79646 Lviv, Ukraine, Andriyevsky B. ,   Koszalin University of Technology, Faculty of Electronics and Computer Sciences Sniadeckich str. 2, 75-453 Koszalin, Poland, Kupchak I.M. ,   V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine 45, prospect Nauky, 03680 Kyiv, Ukraine, Petrus R.Yu. ,   Lviv Polytechnic National University, Department of General Physics Bandera str. 12, 79646 Lviv, Ukraine, Semkiv I.V. ,   Lviv Polytechnic National University, Department of General Physics Bandera str. 12, 79646 Lviv, Ukraine
Published: November 2020

Elastic properties of the CdTe1–xSex (x = 1/16) solid solution in the framework of the density functional theory calculations have been investigated. The structure of the sample has been constructed using that of the original binary compound CdTe, which crystallizes in the cubic phase. The Young modulus, shear modulus, bulk modulus and Poisson ratio have been calculated theoretically. On the results for elastic coefficients, value of acoustic velocity and Debye temperature have been obtained. The obtained values are in good agreement with experimental data.
Structural optimization of optoelectronic components in millimeter-wave radio-transmitting modules
Authors:   State University of Telecommunications, 7, Solomyanska str., 03680 Kyiv, Ukraine, Kremenetskaya Y.A. , Markov S.E. ,   State University of Telecommunications, 7, Solomyanska str., 03680 Kyiv, Ukraine, Melnyk Yu.V. ,   State University of Telecommunications, 7, Solomyanska str., 03680 Kyiv, Ukraine
Published: November 2020

The paper analyzes the effect of structure inherent to optoelectronic radio-transmitting modules of a phased array antenna (PAA) on the noise characteristics in the millimeter range (MMR) of waves. Considered are promising structures of MMR modules for generating radiation with a phased array for communication systems based on optoelectronic technologies. The promising types of photodiodes that are used to form MMR radio signals as well as the distance and physical limitations for photodetectors associated with a limited bandwidth and nonlinear response characteristics have been analyzed. Mathematical modeling of the oscillation of the output current after the optoelectronic conversion of the signal and noise characteristics of the radio-transmitting modules capable to form MMR radiation in PAA has been carried out. The analysis of the nonlinearity of the sensitivity of photodiodes in the high-frequency regions of formation of radio signals has been carried out. The necessity to structurally optimize optoelectronic components in the MMR transmission module has been shown depending on the noise characteristics of the output signal. It has been shown that fundamental studies of nonlinear characteristics and factors limiting the band of photodetectors are important tasks for further developing MMR telecommunications of the next generations.
Rancang Bangun Penstabil Drone S2GA Berbasis Metode Fuzzy Logic Menggunakan Arduino
Authors: Pambudi Wahyu , Darmawan Yudhi , Choirina Priska
Published: November 2020

UAV merupakan wahana teknologi canggih yang sering digunakan di bidang militer untuk misi pengintaian. UAV terdiri dari beragam jenis, salah satunya yaitu quadcopter. Quadcopter yang digunakan dalam misi militer biasanya mempunyai masalah ketidakstabilan ketika quadcopter tersebut terbang membawa senjata. Oleh karena itu, maka diperlukan sebuah sistem untuk mengatur kestabilan dari percepatan motor quadcopter. Pada paper ini dipaparkan sebuah desain system dari stabilizer drone dengan metode logika fuzzy menggunakan 3 derajat. Penelitian ini bertujuan untuk mengkonfigurasikan kontrol kestabilan quadcopter yang optimal setelah diterapkan metode fuzzy logic inferensi Tsukamoto. Input dari system ini adalah percepatan dan perubahan percepatan. Sedangkan output yang dihasilkan berupa kecepatan motor. Untuk mengetahui error dilakukan pengujian ketepatan posisi 5 kali pada ketinggian 1-3 meter. Sedangkan untuk mendapatkan waktu quadcopter untuk kembali ke posisi semula dapat menggunakan stopwatch. Penelitian ini bertujuan untuk mengkonfigurasikan kontrol kestabilan quadcopter yang optimal setelah diterapkan metode fuzzy logic inferensi Tsukamoto. Hasil penelitian dengan logika fuzzy untuk kestabilan menunjukan nilai rise time sebesar 0,7 detik, settling time 2,55 detik, overshoot sebesar 15 % ketika menerima gangguan sebesar 45cm, dan nilai steady-state 69,55 cm dengan simpangan baku sebesar ± 1,775 cm. Hasil tersebut memberikan akurasi dalam menentukan kestabilan yang lebih baik pada quadcopter. UAV is one of the advanced technology that used in the military for reconnaissance missions. UAV consists of various types, one of them is a quadcopter. Since the quadcopter in military missions has an instability problem when they fly with a weapon, they needed to stabilize the acceleration of a quadcopter motor. This paper presents a design system of drone stabilizer using fuzzy logic method based on 3 degrees of freedom to improve stability. Fuzzy logic that used to configure optimal quadcopter stability control is Tsukamoto's inference fuzzy logic method. The input of this system are acceleration and acceleration change. While, the output of this system is the speed of motor. We did 5 times experiment to find out the accuracy of this system at an altitude of 1-3 meters. Furthermore, to get the quadcopter time from return to its original position we used a stopwatch. Based on the experiments, we obtained a rise time value of 0.7 seconds, settling time of 2.55 seconds, overshoot of 15% when receiving interference of 45cm, and a steady-state value of 69.55 cm with a standard deviation of ± 1.775 cm. These result show that fuzzy logic provide a better accuracy in determining stability on quadcopter.
Rancang Bangun Sistem Monitoring PH dan Suhu Air pada Akuaponik Berbasis Internet of Thing (IoT)
Authors: Megawati Dini , Masykuroh Kholidiyah , Kurnianto Danny
Published: November 2020

Akuaponik yang menyatukan sistem budidaya tanaman hidroponik dengan ternak ikan sangat pesat belakangan ini karena menghemat lahan yang digunakan. Sistem akuaponik yang dibahas pada paper ini menggunakan ikan lele dan tanaman kangkung sebagai kombinasi akualtur dan hidroponik dalam lingkungan yang bersifat simbiotik mutualisme. Pada pembudidayaan sistem akuaponik ini dibutuhkan perhatian yang lebih terhadap air, karena air menjadi faktor penting dalam pertumbuhan ikan dan tanaman pada akuaponik. Hal yang perlu diperhatikan yaitu kadar keasaman dan suhu air. Selama ini para pemilik akuaponik masih menggunakan cara manual dalam memonitoring kadar air. Pada penelitian ini penulis membuat solusi suatu kontrol kondisi air menggunakan sensor pH dan suhu berbasis Internet of Things yang menggunakan Arduino Uno sebagai pengontrol mikropengendali, sensor pH digunakan untuk mendeteksi kadar keasaman air, sensor suhu untuk pembacaan suhu menggunakan DS18b20, dan Wemos D1 Mini sebagai interface wifi untuk mengirim data ke firebase. Aplikasi MIT App Inventor digunakan untuk menampilkan data di smartphone pengguna. Dari hasil pengujian akurasi sensor pH air asam didapatkan rata-rata erorr sebesar 7,77%, air murni rata-rata erorr sebesar 6,97%, dan air basa rata-rata erorr sebesar 2,59%. Hasil pengujian akurasi sensor suhu air panas didapatkan rata-rata erorr sebesar 1,59%, air normal rata rata erorr 1,40%, dan suhu air panas didapatkan rata-rata erorr 1,02%. Aquaponics, which combines hydroponic cultivation systems with fish farming, is swift recently because it saves land. In this aquaponics system, catfish and kale are used to combine accumulation and hydroponics in a symbiotic mutualism environment. This aquaponics cultivation system requires more attention, such as water and temperature conditions. Water is an essential factor in the growth of fish and plants in aquaponics. Things that need to be considered are the acidity and the temperature of the water. Mostly, aquaponics owners still use manual methods to monitor water levels. In this paper, we controlled the water condition using a pH and temperature sensor. This system is based on the Internet of Things that using Arduino Uno as a microcontroller controller, a pH sensor used to detect water acidity, and a temperature sensor (DS18b20) for temperature reading, and Wemos D1 Mini as a wifi interface for sending data to Firebase, and the MIT App Inventor application as an application for display on the user's smartphone. Based on the results, the accuracy of the pH sensor for acidic water is 7.77% of error, pure water had an average error of 6.97%, and alkaline water had an average error 2.59%. The results of testing the accuracy of the hot water temperature sensor obtained an average error of 1.59%, normal water had an average error of 1.40%, and the temperature of hot water obtained an average error of 1.02%.
Desain Sistem Charger untuk Baterai berkapasitas 650 mAh Menggunakan Sel Surya
Authors: Alti Rahmi Mudia , Kusuma Fiqri Wijaya , Sovia R Evi
Published: November 2020

Alat charger untuk baterai berkapasitas 650 mAh menggunakan sel surya merupakan uji coba alat yang digunakan untuk charger baterai berkapasitas 650 mAh menggunakan energi matahari. Baterai 650 mAh ini digunakan pada drone. Alat charger menggunakan sel surya ini digunakan sebagai alternatif pengisian energi pada baterai. Alat ini dirancang dengan menggunakan resistor, kapasitor, dioda, saklar, baterai 650 mAh, LED, sel surya, IC lm317, dan trimpot. Perangkat berupa sistem analog yang menggunakan voltage drop dan memanfaatkan step up step down serta LED sebagai indikasi pengisian. Hasil uji fungsi dilakukan dengan cara mengukur intensitas cahaya menggunakan alat lux meter, baik pada saat beroperasi maupun tidak untuk mengetahui nilai intensitas cahaya. Masing-masing panel menghasilkan keluaran tegangan rata-rata 6 Volt DC dengan arus 200mA. Untuk memenuhi kekurangan tegangan, keluaran panel surya dimasukan terlebih dahulu ke modul DC-DC Step Up. Dari modul Step Up tersebut dihasilkan tegangan keluaran sebesar 12 VDC yang kemudian dipakai oleh modul charger untuk melakukan pengisian baterai Lithium-ion Polymer (LIPO). Waktu yang efektif untuk proses pengisian baterai menggunakan sel surya adalah pada waktu siang hari sekitar pukul 11.00 sampai pukul 13.00. Dari hasil uji fungsi yang dilakukan, alat bekerja dengan baik yang ditandai dengan LED berwarna merah yang mengindikasikan sedang terjadinya proses charging. Dengan demikian, alat ini bisa dimanfaatkan sebagai pengisian energi alternatif pada drone yang menggunakan LIPO yang memiliki keterbatasan waktu terbang. The charger for a battery with a capacity of 650 mAh using solar cells is one of tools used for a battery charger with a capacity of 650 mAh using solar energy that commonly used in drones. This solar cell is as an alternative charging energy for the battery. This charger is designed using resistors, capacitors, diodes, switches, 650 mAh battery, LEDs, solar cells, IC LM317, and trimpot. An analog system based on a voltage drop and utilizes step up step down and LEDs was used as an indication of charging. The testing was carried out by measuring the light intensity using a lux meter, both during operation and not to determine the value of light intensity. Each panel produces an average voltage output of 6volt DC with a current of 200mA. To meet the shortage of voltage, the output of the solar panel is first entered into the DC-DC Step Up module. From the Step Up module, an output voltage of 12 VDC is generated which is then used by the charger module to charge the Lithium-ion Polymer (LIPO) battery. The effective time for the battery charging process using solar cells is during the daytime around 11.00 to 13.00. From the results of the function test carried out, the tool works well which is marked by a red LED which indicates the charging process is occurring. Thus, this tool can be used as alternative energy charging for drones that use LIPO which has limited flight time.
Rancang Bangun Quadcopter untuk Terbang Mengikuti Dinding Menggunakan Sensor Jarak Ultrasonik HC-SR04
Authors: Maulidin Indra , Muliady Muliady , Susanthi Yohana
Published: November 2020

Makalah ini memaparkan perancangan dan realisasi sebuah quadcopter menggunakan sensor jarak ultrasonic HC-SR04 agar dapat terbang mengikuti dinding. Algoritma yang digunakan pada realisasi quadcopter adalah algoritma Wall Follower. Fokus pembahasan sistem tersebut adalah mengimplementasikan algoritma Wall Follower pada quadcopter agar dapat terbang navigasi dalam ruang dengan cara mengikuti dinding. Kontrol pergerakan roll menggunakan mode pengontrol ON-OFF Hysteresis sedangkan pada pergerakan yaw digunakan mode pengontrol open-loop. Nilai batas bawah dan batas atas yang digunakan pada kontrol ON-OFF Hysteresis adalah 70 cm dan 100 cm. Hasil pengujian menunjukkan quadcopter berhasil terbang mengikuti dinding sejauh 10,2 m dengan ketinggian maksimum 2,14 m. This paper explained the design and realization of a quadcopter using the HC-SR04 ultrasonic distance sensor so that it can fly following the wall. The algorithm used in the quadcopter design is the Wall Follower algorithm. The focus of the discussion of the system is implementing a Wall Follower algorithm to the quadcopter so that it can navigate following the wall. The roll movement control was using Hysteresis ON-OFF control and the yaw movement control was using open-loop control. The lower and upper limit values that were used in the Hysteresis ON-OFF control are 70 cm and 100 cm. The test results show the quadcopter can fly following the wall as far as 10.2 m and reaches a maximum height of 2,14 m.
Deteksi Plat Nomor Kendaraan dengan Hough Transform dan Harris Corner Menggunakan Akuisisi Melalui Raspberry Pi
Authors: Romadhon Noor Akhmad Gilar , Usman Koredianto , Patmasari Raditiana
Published: November 2020

Dalam suatu tempat, seperti di mall, tempat parkir kendaraan dapat terdiri dari beberapa lantai di basement atau di bagian atas bangunan. Di samping itu juga banyak sektor yang berubah fungsi menjadi tempat parkir. Dalam situasi ini, diperlukan sistem monitoring kendaraan yang fleksibel. Pada penelitian ini dibuat sistem yang dapat mengenali jenis kendaraan berdasarkan warna dasar pada plat nomor apakah kendaraan tersebut merupakan kendaraan pribadi, umum, atau pemerintah. Data berupa citra diambil dengan menggunakan webcam melalui akuisisi Raspberry Pi. Sistem dirancang dengan menggunakan deteksi tepi dan morfologi serta menggunakan metode Hough Transform untuk memperbaiki garis tepi dan Harris Corner untuk mendeteksi sudut pada citra. Selanjutnya dilakukan proses cropping plat. Deteksi warna dasar plat nomor dilakukan dengan menggunakan ruang warna YcbC. Selain itu, dilakukan perhitungan waktu proses akuisisi dan waktu proses keseluruhan ketika Raspberry Pi dan laptop melakukan proses deteksi. Berdasarkan hasil pengujian, sistem mendapatkan hasil terbaik sebesar 100% saat deteksi plat nomor kendaaraan pribadi dan hasil terburuk sebesar 70% saat deteksi plat nomor kendaraan umum. Rata-rata akurasi yang didapatkan pada sistem ini sebesar 88,9%. Akurasi tersebut diperoleh dengan 90 data uji. Rata-rata waktu komputasi adalah 0,99 detik, yang artinya proses pendeteksian dilakukan cukup cepat. In some place, such as in a mall, a vehicle parking lot can consist of several floors in the basement or at the top of a building. In addition, many sectors have also been turned into parking lots. In this situation, a flexible vehicle monitoring system is needed to detect the type of vehicle ownership through the base color on the license plate connected to the Raspberry Pi, which is expected to be able to mitigate this problem. This research develop a system that can recognize the type of vehicle based on the color of the plate number whether the vehicle is a private, public, or government vehicle. The data consists of images taken using a webcam through the acquisition of Raspberry Pi. The system was designed by using edge detection, morphology, the Hough Transform method to correct the edge, and Harris Corner to detect angles in the image, after which the plate cropping process is carried out. The license plate base color is detected using the YCbCr color space, and the system will also measure the quality of the network between the Raspberry Pi and the laptop used during the detection process. The system gets the best results at 100% when detecting private vehicle license plates and the worst results at 70% when detecting public vehicle license plates. The average accuracy obtained in this system is 88,9% that used 90 test data. The average computation time is 0,99 seconds, which means that the detection process is quite fast.
Existence of random attractors for strongly damped wave equations with multiplicative noise unbounded domain
Authors: ISSAQ Abdelmajid , MA Qiaozhen , MOHAMED Ahmed Eshag
Published: November 2020

In this paper, we establish the existence of a random attractor for a random dynamical system generated by the non-autonomous wave equation with strong damping and multiplicative noise when the nonlinear term satisfies a critical growth condition.
Redescobrindo a floresta decídua no Espírito Santo: o caso de São João de Petrópolis, Santa Teresa
Authors: Saiter Felipe Zamborlini , Oza Eduardo France , Santos Millena Monteiro dos , Andrade Silas Fernandes Silveira de , Locatelli Marcos Vinicius , Tonini Victório Birchler , Vieira Gustavo Haddad Souza
Published: November 2020

Resumo Neste estudo, analisamos dados climáticos, um modelo de balanço hídrico e dados de caducifolia de árvores com o objetivo de determinar a fisionomia de uma floresta em São João de Petrópolis, região central do Espírito Santo, Brasil. Hipotetizamos que a floresta estudada seria um remanescente das florestas decíduas relatadas por naturalistas nos séculos XIX e XX, apesar do atual Mapa de Vegetação do Brasil indicar apenas florestas pluviais para a localidade. Dados obtidos de uma estação meteorológica local indicam que o clima é quente e com distribuição sazonal de chuvas. Embora a estação seca tenha durado seis meses em média (abril-setembro), períodos secos mais longos foram recorrentes nas últimas quatro décadas. Dentre 354 árvores amostradas no estrato superior da floresta no final da estação seca, 65,2% não possuíam folhagem, 18,1% possuíam folhagem parcial e 16,7% possuíam folhagem completa. A proporção de árvores sem folhagem foi superior a 60% em todas as classes de altura desse estrato. Esses atributos, bem como alguns registros de espécies arbóreas típicas de florestas estacionais, confirmam que a floresta é estacional decídua. Nossos resultados refinam o Mapa de Vegetação do Brasil e podem fomentar discussões sobre a controversa classificação das florestas do Estado do Espírito Santo.
Evaluation of HIV & AIDS Surveillance System in Afghanistan
Authors: H Naqibullah , A Haneef
Published: November 2020

Afghanistan is a country with low HIV prevalence among general population. The prevalence of HIV is less than 0.1% among general population, 4.4% among People who Inject Drugs-PWID, 0.7% among prisoners, 0.4% among Men with High Risk Behavior-MHRB and 0.3% among Women with High Risk Behaviors-WHRB. To manage the response toward HIV epidemic sound data is needed but the reliable data on HIV prevalence is inadequate and not updated in the country as the last Integrated Behavioral and Biologic Survey-IBBS was conducted in 2012.
Interpositional Arthroplasty for Treatment of ATM Ankylosis
Authors: FDB Dos Santos , E Braz , MR Matos , MO Schmitz , FHS Tomazi , M Chiarelli , JP Claus , LH Marola , A Castellano
Published: November 2020

Introduction: The temporomandibular joint ankylosis is the union between the surface of the temporal bone in its articular portion and the complex made out of articular disk and the condyle. Its etiology is multifactorial being the trauma with condylar fracture most cited. This alteration causes several functional disorders to the patient, among them the main one is the limitation of mouth opening, which causes difficulty eating, speaking, hygiene, speech and others. The diagnosis is made through a clinic image test. The goal is to show a report of case of ankylosis as well as a literature review.
Evaluación de la madurez en ergonomía de una empresa floricultora: salud, seguridad y productividad desde una perspectiva organizacional
Authors: Pérez Mergarejo Elizabeth , Giraldo Ocampo Claudia Patricia , Rodríguez Ruíz Yordán
Published: November 2020

Introducción: A nivel global ha sido demostrada la contribución de la ergonomía en la mejora y optimización de los sistemas de trabajo impactando directamente en la salud, seguridad y productividad. Sin embargo, en términos organizacionales y sociales, una de las razones que ha limitado su potencial y marcada influencia positiva, es la carencia de un enfoque sistémico durante su aplicación. Objetivo: Evaluar desde una perspectiva sistémica el nivel de madurez de ergonomía de una empresa colombiana del sector floricultor. Métodos: Fue utilizado el método macroergonómico Modelo de Madurez de Ergonomía. En el proceso de evaluación participaron de forma voluntaria 61 trabajadores de la empresa. Fueron aplicadas tres herramientas para asistir en la evaluación de la madurez: la matriz de evaluación del modelo, el cuestionario de ponderación de los elementos del modelo y un cuestionario detallado. Resultados: Como resultado de la aplicación del Modelo de Madurez de Ergonomía en la empresa floricultora se obtuvo un nivel de madurez 1, lo que se corresponde con un estado de desconocimiento. De igual manera, se evidenció que los elementos evaluados que alcanzaron menores niveles de madurez fueron: alineación estratégica, responsable, compensación, sistema de información y evaluación de riesgo. Conclusión: El Modelo de Madurez de Ergonomía permitió identificar los elementos críticos que impedían el desarrollo de la ergonomía en la empresa.
Síndrome de Bouveret como causa de sangrado de vías digestivas
Authors: Lozada-Martinez Ivan David , Herrera-Zabaleta Luis , Muñoz-Botero Néstor , Plata-Patiño José , Castilla-Tarra Jorge , Bolaño-Romero María
Published: November 2020

Introducción: El síndrome de Bouveret es una condición de observación infrecuente, descrita como la obstrucción de la salida gástrica secundario a un litio biliar impactado en el duodeno, gracias a la presencia de una fistula bilioentérica. El cuadro clínico producido por esta entidad es inespecífico y generalmente de inicio benigno, por lo que puede no ser diagnosticada y precipitar complicaciones con el paso del tiempo. Caso clínico: Paciente femenina de 84 años de edad que acude al servicio de urgencia en la ciudad de Cartagena, Colombia; por un cuadro clínico de aproximadamente 3 días de evolución, consistente en 3 deposiciones melénicas y 2 vómitos hemáticos en cuncho de café, asociado a epigastralgia ocasional en el mismo tiempo. Discusión: El síndrome de Bouveret es una complicación extraordinaria de la enfermedad litiásica biliar. La melena y melanemesis son signos que sugieren la presencia de esta entidad, por lo que es indispensable la valoración de factores de riesgo para el descarte de diagnósticos diferenciales. La tomografía computarizada es el gold estándar para el diagnóstico imagenológico, pudiéndose encontrar la triada de Rigler. La intervención endoscópica es la terapia de primera línea, reservándose la enterolitotomia abierta en caso de falla terapéutica o progresión del cuadro clínico a íleo biliar.
Una nueva especie de Deiregyne (Orchidaceae: Spiranthinae) de Hidalgo, México
Authors: A. Salazar Gerardo , Hernández-Cardona Alfonsina , Jiménez-Machorro Rolando
Published: November 2020

Se describe e ilustra a Deiregyne callifera Salazar & Hernández-Cardona, nueva especie de orquídea de las estribaciones de la Sierra Madre Oriental en el estado de Hidalgo, México. La nueva especie es similar a D. eriophora (B.L.Rob. & Greenm.) Garay, con la que es simpátrica, distinguiéndose por la inflorescencia glabra, flores más numerosas, de menor tamaño y dispuestas densamente en varias espirales entrelazadas, la parte proximal del labelo más ancha que larga y provista de un callo lunado prominentemente papiloso y la columna más corta y con ápice inflexo.
Reforestación con Cupressus lusitanica y su influencia en la diversidad del bosque de pino-encino en Los Altos de Chiapas, México
Authors: Fernández-Pérez Laura , Ramírez-Marcial Neptalí , González-Espinosa Mario
Published: November 2020

El uso extendido de Cupressus lusitanica para reforestar áreas degradadas puede reducir la riqueza y diversidad de bosques húmedos de montaña. Se comparó la composición y estructura de la vegetación leñosa de un área reforestada con C. lusitanica con la de fragmentos de bosque de Pinus-Quercus y bosques secundarios de pino-encino en Los Altos de Chiapas. Los tres tipos de bosque presentaron diferencias significativas ( P ? 0.01) en cobertura, riqueza y diversidad de especies leñosas. La mayor área basal de árboles grandes se registró en el bosque de Pinus-Quercus (38.7 m2ha-1) seguida del bosque secundario (16.5 m2ha-1) y la más baja en el sitio reforestado con Cupressus (12.7 m2ha-1). Aunque la menor riqueza ( P ? 0.05) de especies arbóreas se registró en esta última condición (16 especies), comparada con el bosque de Pinus-Quercus (18) y el bosque secundario (30 especies), la diversidad de árboles (> 10 cm de diámetro a la altura del pecho) resultó mayor en el sitio reforestado con Cupressus ( P ? 0.05). Las principales variables edáficas que explicaron las diferencias entre las parcelas mediante un análisis de escalamiento no métrico multidimensional fueron el contenido de fósforo y arcilla ( P < 0.05). Se concluye que la reforestación después de 28 años ha sido efectiva para recuperar la cobertura del sitio; además de permitir la presencia de varias de las especies encontradas en los bosques aledaños no reforestados.
İlk Trimester Tarama Testi Risk Kategorilerinin Gebelik Sonuçları ile İlişkisi
Authors: KILINÇDEMİR Ümran , SEZİK Mekin
Published: November 2020

İlk trimester tarama testi risk kategorilerinin gebelik sonuçları ile ilişkisi
Özet
Amaç: İlk trimester tarama testinde nukal saydamlık (NT) artışının, fetal anomali varlığının ve kombine testte risk artışının genetik hastalıklarla ilişkisi bilinmektedir. Ancak, kombine testte 1/250-1/2000 olarak belirlenen orta riskli grubun yönetimi tartışma konusudur. NT artışının, fetal anomali varlığının ve kombine testte yüksek ve orta risk gruplarının gebelik sonuçlarına dair veriye ihtiyaç duyulmaktadır. Buna dayanarak mevcut araştırmada, ilk trimesterde patolojik bulgu saptanan fetüslerin gebelik sonuçlarının değerlendirilerek, takip ve tedaviye yönelik sonuçlara varılması amaçlanmıştır.
Gereç-yöntem: Yirmi aylık dönemde ilk trimester tarama testi ve ikinci trimester ayrıntılı fetal muayenesi tek bir perinatoloji ünitesinde tamamlanmış ve gebelik sonucu dökümante edilmiş 268 gebe çalışmaya dahil edildi ve fetal anomali varlığı, NT artışı (3.5 mm ve üzeri) ve kombine testte risk artışı olarak gruplara ayrıldı. Yüksek risk, kombine test riski 1/250 üzerinde ve/veya NT 3.5 mm üzerinde olması; orta risk ise kombine test riski 1/250-1/2000 arasında saptanması olarak kabul edildi. İnvaziv test uygulanan gebeliklerin fetal genetik sonuçlarına, spontan veya indüklenmiş terminasyonların ise fetal otopsi ve genetik sonuçlarına ulaşıldı. Veriler frekans (n) ve yüzde (%) olarak değerlendirildi. İlk trimester tarama testi için pozitif prediktif değer (PPD) hesaplamaları yapıldı.
Bulgular: Çalışmaya alınan 268 tekil gebeliğin 46’sında (%17) sonografide anomali (n=18, %39) veya kombine test tarama sonucunda >1/2000 risk artışı (n=28, %61) saptandı. Merkezi sinir sistemi anomalileri en sık saptanan anomaliydi (9/18, %50). Anöploidi oranı en yüksek (%57) patoloji hidrops fetalis idi. Trizomi 21 saptanan fetüslerin %50’sinde (2/4) sonografik taramalar normaldi. Kombine testte yüksek ve orta riskin pozitif prediktif değeri sırası ile %29.4 ve %12.5 olarak hesaplandı.
Sonuç: Trizomi 21 olgularının en az yarısında sonografik bulgu olmayabileceğinden, ultrason ve serum parametreleri kombine olarak ele alınmalıdır. Kombine testte orta riskli her 8 fetüsün birinde genetik anomali saptanabileceğinden, bu gruptaki gebeler için ileri tanı ve takip seçenekleri dikkatli şekilde planlanmalıdır.
Nadir Görülen Bir Paraneoplastik Sendrom; Sweet Sendromu
Authors: GÜNEY Dilek , ŞAHİN Mehtap
Published: November 2020

Paraneoplastiksendrom; primer tümöre veya metastazlarına ait bir etki sebebi ile oluşmayan ancak tümörün varlığına bağımlı olarak gelişen belirti ve bulgulardan oluşan klinik tablo olarak adlandırılır. Paraneoplaziler varlığı bilinen bir tümörün seyri sırasında görülebildiği gibi, klinik olarak ortaya çıkmamış gizli bir tümörün ilk ve tek belirtisi olabilir ve bu sayede primer kanserin erken evrede tanınmasına yardımcı olabilmektedir. Akut febrilnötrofilik dermatoz olarak da bilinen Sweet Sendromu; ani başlangıçlı, ağrılı, inflamatuvar papül veya nodüllerden oluşmuş eritemli plaklar, ateş, eklem ağrısı, periferiklökositoz ve cildin dermis tabakasında yoğun nötrofil infiltrasyonu ile karakterize nadir görülen tekrarlayan inflamatuvar bir cilt hastalığıdır. Hastalık; inflamatuar bağırsak hastalığı, enfeksiyonlar, ilaçlara sekonder, malignite yesekonder (paraneoplastik) olarak gözlemlenebilmektedir.Bu yazımızda akut gelişen döküntü ve ateş şikayetleri ile başvurduğu hastanede Sweet Sendromu ön tanısı ile interne edilen yapılan etyolojik araştırmasında metastatik akciğer karsinoid tümör tanısı konulan 69 yaşında erkek hasta ile ilgili bir olgu sunmayı amaçladık.
O ENSINO MORAL E CÍVICO COMO PRINCÍPIOS EDUCATIVOS NA FORMAÇÃO DOS CIDADÃOS
Authors: Tavares Thiago Passos , Mota Marlton Fontes , Feldens Dinamara Garcia
Published: November 2020

Esta pesquisa objetiva identificar o ensino moral e cívico como princípios educativos na formação dos cidadãos e traz reflexões sobre o ensino jurídico, a partir de suas políticas, ações e diretrizes institucionais. Trata-se de uma pesquisa aplicada, com abordagem qualitativa na qual se utilizou como instrumento para levantamento dos dados a partir de uma consulta semiestruturada a livros e artigos científicos. Foram empregados procedimentos metodológicos pautados em estudos descritivos e exploratórios como: levantamento bibliográfico. Os resultados obtidos revelam que para que aconteça um real desenvolvimento humano, com progressos substanciais e significantes, torna-se necessário a melhoria na qualidade da educação, tendo em vista que números por si só não representam um verdadeiro progresso de uma nação e sim um falso desenvolvimento desta.
Alliances of Instrumental Advantage: Supporting Women’s Agency in Civil Society Organisations in Indonesia
Authors: Sherlock Stephen
Published: November 2020

This article examines how Indonesian civil society organisations (CSOs) working for women’s empowerment and gender equality have worked together with members of parliament (MPs) to support processes of developmental change. Examples are taken from initiatives supported by MAMPU, an Australian government funded project that promotes gender equality and women’s empowerment in Indonesia, describing ways in which gender-focused organisations have engaged with, and had an impact upon, the actions of political leaders in parliament. The article focuses on interaction between institutions and the agency exercised by individuals within institutions. MPs act within a structure of institutional and political incentives, but they also have the power to make choices about how they respond to incentives. Moreover, the leaders of outside actors such as CSOs can modify the structure of incentives by both applying pressure on MPs and providing opportunities for legislators to make different choices. One of MAMPU’s tools for targeting MPs has been political economy analysis. Having correctly understood the pressures and incentives facing MPs, CSOs can target their actions to bring about outcomes favourable to both sides in what the article calls ‘alliances of instrumental advantage.’ Organisations supported by MAMPU achieved success where relationships were forged between the organisations and politicians based on the identification of mutual advantage.
Annual influenza vaccination of patients with cardiovascular diseases and changes in hemagglutinin antibody titers: 3-year follow-up data
Authors: Platonova Elena V. , Deev Alexandr D. , Gorbunov Vladimir M. , Nazarova Olga A. , Belova Olga A. , Furman Nicolay V. , Dolotovskaya Polina V. , Mironova Alexandra A. , Dovgalevsky Pavel Ya. , Loukianov Michail M. , Boytsov Sergey A.
Published: November 2020

BACKGROUND: Seasonal influenza vaccination is recommended for patients with cardiovascular diseases. Low vaccination coverage among these patients is due to insufficient knowledge about vaccine efficiency and its regular annual use.
This work aimed to study the repeated 6-month changes in hemagglutinin antibody titers (AT) for 3 years in patients with cardiac pathology in a comparative study of influenza preventive vaccination.
MATERIALS AND METHODS: Analysis of ATs obtained based on the hemagglutination-inhibition test (HAI) was performed in 235 of 817 participants in a prospective follow-up. Blood sampling was performed at baseline, before the vaccination, and 6 months after, and at the same term in unvaccinated patients in the 20122013 and 20142015 seasons, respectively. The seropositive and seronegative responses to vaccination or acute respiratory or influenza infection were used, according to the reference values of seroconversion and seroprotection and the fact of seroconversion. Multiple regression analysis with a logarithmic scale was used to assess the vaccine effectiveness indices.
RESULTS: With vaccination coverage of at least 40% against seasonal influenza within 3 years, the trends of a decrease in seropositive and an increase in seronegative responses in the vaccination group and its reverse nature in the comparison group were determined by traditional analysis. Using logarithmic calculation, an increase in HAI AT seroconversion was revealed over a 3-year follow-up period. It was characterized by a homogeneous serological response at annual vaccination and heterogeneous with a higher serological response in cases without vaccination (p = 0.002 for H1N1 and p = 0.005 for H3N2, respectively). This trend can be determined by a higher and more stable prevaccination level of HAI AT than the same residual level of AT among unvaccinated patients.
CONCLUSION: During long-term cardiac studies, the logarithmic calculation in interpreting the results of HAI AT overcomes the limitations of the traditional analysis of assessing the efficiency of the annual influenza vaccine. Further serological programs are required to better understand the role of routine seasonal influenza vaccination in preventing morbidity and mortality of patients with cardiovascular diseases.
Hadislerde Beş Tümele Göre Tanım Örnekleri
Authors: BABA Coşkun
Published: November 2020

Her bilim, diğer disiplinlerden tanım ile ayrılır. Bu nedenle her bilim tanım ile başlamaktadır. Mantığın asıl amaçlarından olan tanım konusu, klasik mantığın temel konularının işlenebilmesi için bilinmesi şart olan bir konudur. Dolayısıyla mantıktaki temel konulara geçmek için tanım konusunun da bilinmesi zaruridir. Akıl yürütme ve mantıklı düşünmenin ilk ve temel prensibi tanım konusudur. Tanım, klasik mantık açısından cins-tür ve içlem-kaplam ilişkisini ele almaktadır. Bu çalışmada, hadislerde beş tümele göre tanım örneklerini göstermeye çalışacağız. Bu çalışmamızın amacı, hem mantığın her alanda olduğu gibi hadislerle de ilişkisinin olduğunu göstermek hem de başka konulara örnek olmasını sağlamaktır. Bu çalışmada ele aldığımız hadislerdeki tanımları beş tümele göre göstermeye çalışacağız. Çalışmamızda tam özsel tanıma, tam ilintisel tanıma, eksik özsel tanıma ve eksik ilintisel tanıma olmak üzere her bir tanım çeşidine hadisler üzerinden örnek verilmeye çalışılacaktır.
Политическая теория деколонизации: императивы современного прочтения
Authors: Фитуни Леонид , Абрамова Ирина
Published: November 2020

Статья посвящена анализу эволюции и частичному переосмыслению политической теории деколонизации в свете глубоких изменений, произошедших со времени принятия по инициативе СССР XV сессией Генеральной Ассамблеей ООН в 1960 г. Декларации о предоставлении независимости колониальным странам и народам. Цель такого переосмысления авторы видят в необходимости подведения итогов прошедших за 60 лет на международной арене процессов и важности познания особенностей современного этапа глобальных политических отношений в контексте незавершившейся в широком смысле деколонизации, сохранения элементов колониальности в мировой политике в целом, а во многих странах бывшей колониальной периферии и на внутригосударственном уровне. Авторы дают свою критическую оценку современного исследовательского поля деколонизации, анализируя ключевые теоретические направления и школы мысли – теории постколониализма, деколониальности, субальтерности и др. В результате проведенного критического анализа авторы приходят к выводу об изменении магистральной направленности современных теоретических работ по деколонизации, выразившемся в смещении интереса и внимания научной мысли с конкретных проблем политики, экономики, государственного строительства в нематериальные (информационная сфера, наука, культура, искусство, язык и т.п.) или глубоко субъективные области (сознание, самоидентификация, репрезентация, память). На основе обобщения практического опыта, истории, результатов и последствий деколонизации авторы систематизируют представления об эволюции колониальности в международных отношениях и мировой экономике в Новейшее время, выделяя три этапа (фазы) ее трансформации: а) этап “классического” колониализма конца XIX – первой половины XX в.; б) фаза неоколониализма (“неоколониальные формы”) периода с середины XX в. до распада мировой системы социализма, в) сформированный условиями глобализации современный этап постнеоколониализма. Логической ответной реакцией на постнеоколониальность становится задача новой деколонизации, предполагающая многовариантность путей развития и сохранение собственной системы ценностей, включая выбор путей и моделей развития, а также культуру, науку и язык.
“Политический атлас современности” revisited
Authors: Мельвиль Андрей , Миронюк Михаил
Published: November 2020

В статье представлены результаты развития проекта “Политический атлас современности” (“Атлас 1.0”), осуществленного более 10 лет на базе МГИМО-Университета МИД России при поддержке Института общественного проектирования и журнала “Эксперт”. В оригинальном проекте были предложены пять комплексных индексов – государственности, внешних и внутренних угроз, потенциала международного влияния, качества жизни и институциональных основ демократии. Методом дискриминантного анализа по индексам были рассчитаны рейтинги 191 государства-члена ООН (а также Тайваня) по состоянию на 2005 г. Полученные результаты, отражающие различные аспекты существования современных государств, были “свернуты” в четыре главные компоненты, в совокупности представляющие собой аналитическую модель мировой структуры. В проекте, реализованном на базе НИУ ВШЭ при поддержке гранта РНФ спустя свыше десяти лет (“Атлас 2.0”), полученные ранее результаты были проверены на устойчивость, были сделаны поправки на появление новых государств-членов ООН, уточнены компоненты индексов, использованы новые базы статистических данных и применены уточненные методы многомерного статистического анализа, что в совокупности позволило сделать ряд содержательных заключений о динамике мировой структуры. Проделанное исследование выполнено в традиции “Revisited” в современных социальных науках. Полученные результаты (прежде всего в конфигурации главных компонент) свидетельствуют о значительной стабильности базовых параметров мировой структуры, но в то же время выявляются и важные элементы динамики.
CONFORMATIONAL ANALYSIS OF THIAZOLE-5-CARBOXYLIC ACID USING DFT/TD-DFT METHODS
Authors: KUŞ Nihal
Published: November 2020

In this work, structures of the conformations of the thiazole-5-carboxylic acid (T5CA) were studied using density functional theory (DFT) with B3LYP/6-311++G(d,p) level of approximation. From calculations of the potential energy distribution depending on the orientation of the carboxylic group (C-C-OH and O=C-OH) attached to the five-membered heterocyclic ring, four conformers were found at minimum energy. Considering that the relative energy in the most stable structure is zero. The relative energies of the other conformations were found to be about 0.14, 27.11, 29.84 kJ mol-1, respectively. It was found that the carboxylic acid group of the T5CA_3 and 4 were not planar, while T5CA_1 and T5CA_2 were planar. Stabilization and donor-acceptor orbital interaction energies were calculated for all conformations and orbitals were plotted using natural bond orbital analysis (NBO) method. The excited state energies were calculated and graphed using Time-Dependent Density Functional Theory (TD-DFT) calculations. The singlet state energies were tabulated for all conformations and it was seen that the most stable form with the highest oscillator strength was at the second singlet state (S2). In addition, HOMO-LUMO energy gaps were calculated and electrostatic potential surface maps were drawn for all conformations.
FREE SEMIGROUP PRESENTATIONS
Authors: Francis Nwawuru
Published: November 2020

Let and  be two free semigroups. We define external direct product of two free semigroups as an ordered pair of words such  that and .We investigate the presentations of external direct product of free semigroups, state and prove under some conditions that the external direct product of two finitely generated free semigroups is finitely generated, also the external direct product of two finitely presented free semigroups is finitely presented.
Controlling glycated hemoglobin prevent diabetic retinopathy
Authors: Patel Philip , Craig Alan
Published: November 2020

The overall number of patients with Diabetic retinopathy (DR) will continue to increase in parallel with the increasing global pandemic of type 2 diabetes. Diabetic retinopathy is the most common cause of visual loss in United Kingdom. A systematic medline search was conducted initially using the following keywords: clinical trials, diabetic retinopathy, hyperglycemia, macular edema, visual loss. Relevant abstracts and computer links to these abstracts were reviewed and a preliminary list of possible articles from this search was compiled. Next, the original articles from the list were retrieved and evaluated. Based on landmark of data, DR have become preventable by controlling hyperglycemia targeting HbA1c<7.0%, with other multifactorial treatment.