bluuebunny/crossref_metadata_2025 huggingface dataset:
VALIDACIÓN DE UN MÉTODO GRAVIMÉTRICO PARA LA DETERMINACIÓN DE SÓLIDOS SUSPENDIDOS TOTALES SECADOS A 103 – 105°C
Authors: Burgos Galeano Carlos , Castellanos Peñafiel Cristian Alfonso , Hernandez Never Luis
Published: May 2021

En la presente investigación, se llevó a cabo la validación del método gravimétrico para determinar los sólidos suspendidos totalessecados a 103-105°C en aguas naturales y residuales. Este proceso es fundamental en los laboratorios certificados según ISO / IEC17025 y permite obtener datos confiables. Para el desarrollo de este trabajo fue tomado como referencia el método de la sección 2540 Dpropuestos por el estándar método edición 23, para la determinación de sólidos suspendidos totales. En este caso particular, el método consistióen la filtración de una muestra bien mezclada a través de un filtro de fibra de vidrio estándar previamente pesado, y luego de secado el filtroy el residuo retenido en él a un peso constante en un horno a 103-105 °C. El aumento en el peso del filtro representa los sólidos suspendidostotales. Los resultados para este método son confiables debido a que se logró porcentajes de error y de coeficientes de variación, inferioresal 10%, lo que muestra que dicho análisis se realizó con una buena exactitud y precisión, con un límite de detección de 11,01 mg de caolín/L,mostrando que se realizó un buen proceso en la determinación de solidos suspendidos totales. La validación realizada en este trabajo, muestraque las metodologías empleadas cumplen con los criterios exigidos ante los entes de control como el IDEAM, que permiten garantizar que losanteriores resultados son de alta confiabilidad en el laboratorio de Investigación y Calidad Ambiental del SENA Regional Córdoba y a su vez es un soporte para mantener la acreditación bajo la resolución 0477 del 15 de mayo 2019, conservando los lineamientos de la norma anteriormente citada.
COMPARACIÓN DE LAS PLATAFORMAS DE COMPUTACIÓN EN LA NUBE OPENSTACK, OPENNEBULA Y CLOUDSTACK PARA HPC: ESTADO DEL ARTE
Authors: Castillo Ramirez Mario Germán , Castillo Ortiz Oscar Eduardo
Published: May 2021

En este artículo nuestro objetivo es comparar los artículos que realizan la evaluación de desempeño de la plataforma de computación en la nube (CC) OpenStack, OpenNebula y CloudStack. Las tres plataformas son software de código abierto (Open Source) para el despliegue de nubes privadas y públicas, pero difieren en su arquitectura de construcción y el método de despliegue de la solución. En el artículo se presenta la comparativa entre las tres plataformas de CC, revisando su arquitectura, sus elementos funcionales más importantes, se identifican lasmedidas de desempeño típicamente utilizadas en la ejecución de problemas computacionales complejos (HPC) y se contrastan los resultadosque obtuvieron otros autores en las pruebas técnicas de rendimiento en HPC. Al final del artículo se evidencia como las plataformas de computación en la nube agregan una sobrecarga a la ejecución de HPC, pero acorde con el problema computacional a resolver dichasobrecarga resulta manejable y se presenta como una alternativa favorable en relación con tener una infraestructura en local (on-premise).
ANÁLISIS DE DESEMPEÑO DEL SISTEMA IMPLEMENTADO DE ENERGÍA SOLAR FOTOVOLTAICA PARA GENERACIÓN DE ELECTRICIDAD EN EL CENTRO DE DISEÑO E INNOVACIÓN TECNOLÓGICA INDUSTRIAL CDITI EN LA CIUDAD DE DOSQUEBRADAS
Authors: Gallego Meneses Johanny
Published: May 2021

Este artículo presenta los valores de energía solar fotovoltaica generada con 24 paneles solares fotovoltaicos instalados en el Centro de Diseñoe Innovación Tecnológica Industrial, en el cual se tuvo en cuenta la ubicación geográfica de la ciudad de Dosquebradas, su cambiante clima, susbancos de nubes constantemente ubicados sobre la ciudad, los cuales impiden en gran medida la incidencia de los rayos solares sobre los techosde sus edificaciones, siendo estas algunas de las características de la ciudad en la región andina que a su vez desmejora la oportunidad de captarmás irradiación solar. Los datos presentados en este artículo han sido obtenidos del software de control y supervisión Solar Power del inversorHybrid 10kW PV Inverter instalado para el propio sistema híbrido que funciona en el CDITI. La información obtenida será objeto de consulta parafuturos proyectos de mediana y gran proporción en el ámbito de las energías renovables, dadas sus características de obtención de datos entiempo real y comprobables.
PROJETO FOTOGRÁFICO PLURAL DOCUMENTA A HISTÓRIA RECENTE DE LONDRINA (PR)
Authors: Boni Paulo César
Published: May 2021

Este texto relata a experiência inovadora vivida pelo projeto de documentação fotográfica A História de Londrina contada por imagens – 2001-2020, desenvolvido pelo Curso de Especialização em Fotografia da Universidade Estadual de Londrina (UEL), cujo objetivo era registrar e documentar, por meio de micro-histórias visuais e de forma plural (pelo olhar de centenas de pessoas), a possibilidade de os londrinenses declararem o seu amor por Londrina por meio de fotografias e de documentarem as transformações paisagísticas urbanas e rurais da cidade durantes as duas primeiras décadas do século XXI.
Comparative Evaluation of Saliva and Serum Proteins in Diabetics and Normo-Glycemics
Authors: Omamuzo Ogagayere Lucky , Aziakpono Omoirri Moses , Ikechukwu Oraekei Daniel , Uyovwiesevwa Ataihire Johnson , Charles Ofili Chukwuemeka
Published: May 2021

One of the most probable markers of inflammatory response is serum protein. Recently, serum levels of these some proteins have been proven to be useful in clinical diagnosis. In this study, we comparatively investigated serum and saliva C - reactive protein (CRP), α-amylase and α-glucosidase activities in type II Diabetic and Normo-glycemic humans. Two hundred and thirteen (213) subjects of 173 Diabetics and 40 Non-diabetics (Control) were ethically recruited from the central hospital, warri, Delta State. For each participant, serum and saliva was collected and laboratorily analyzed for α-amylase, α-glucosidase and CRP levels, while comparing mean differences between groups with a student t-test and statistical measure of association (correlation). Result showed a statistically significant increase in CRP and α-amylase activity of diabetics than non-diabetic subjects, with a statistically significant increase in salivary and serum CRP, α-glucosidase and α-amylase levels across groups. This finding is suggestive that saliva and/or serum levels may be useful bioanalytes for non-invasive, alternative diagnosis of blood glucose levels. Similar studies that corroborate the efforts of this study is recommended. Further studies that assay other saliva and serum biomarkers may also be useful and thus recommended.
Torsion of the Vascular Pedicle of A Wandering Spleen: An Unusual Cause of Intestinal Strangulation
Authors: Lucas Randimbinirina Zakarimanana , Nathan Ratsimarisolo , Voahary Rajaonarivony Maheriandrianina Fanambina , Ahmad Ahmad , Agnès Ravalisoa Marie Lydia
Published: May 2021

Ectopic spleen is a rare splenic malformation. Apart from torsion of the vascular pedicle, a common complication, an ectopic spleen could be responsible of an acute intestinal obstruction. We report a case of an 8-year-old girl who presented an acute abdomen, following of the transverse colon strangulation by the torsion of the vascular pedicle of a wandering spleen. The patients benefited a surgical opening into the abdomen who has been confirmed the diagnosis and made a detorsion of the vascular pedicle of spleen with splenopexy.The interest of this case report lies on the rarity of a wandering spleen and on the unusual situation of transverse colon strangulation by the vascular pedicle of spleen.
Exploring the Ivorian Shea Butter Potentialities: Consumers and Scientists Approach
Authors: Mégnanou R.-M. , Niamké S.
Published: May 2021

Traditional shea butter is generally obtained through various uncontrolled methods, leading to a wide variability of quality. Nevertheless, consumers often complain about this fat because of it unconformity with their demands. Indeed, Ivorian ordinary consumers mostly prefer whitish odorless and fondant shea butter. Moreover, traders and industries interest in shea butter as raw material, would reside in its exceptional quality and potentialities of exploitation in several fields. An optimized traditional process was proposed by the present authors not only as a standard method, but also as a response to the whole users’ exigencies. Resulting beige and yellow shea butters present very weak acid and peroxide indexes, very high unsaponifiable matters. Viscosity decreased exponentially with the temperature increasing, when UV-Vis and near infra-red spectra revealed presence of UV-filter compounds, carotenoids, and chlorophyll. Chromatographic profile identified palmitic, stearic, arachidic acids, and essential fatty acids like oleic and linoleic and also exaltolides compounds. Samples also contained essential minerals (Calcium, magnesium, zinc, iron, etc.) carotene, vitamins A in relatively important amounts. Moreover, neither microbiological germs nor heavy were detected.

All these valorizing characteristics would confer to the optimized shea butters good aptitude for households feeding and body care, and also profile a wide range of exploitation in food, cosmetic and pharmaceutical industries.
Job Insecurity Anomaly on Turnover Intention and Employee Performance in The Organization Heavy Equipment Transportation Services
Authors: Soelton Mochamad , Wahyono Tri , Oktaviar Chairiel , Arief Harefan , Saratian Eko Tama Putra , Cahyawati Indah , Syah Tantri Yanuar Rahmat
Published: May 2021

Human resources are important resources that support organizations in achieving competitive advantage. Therefore, it is important to involve employees to drive the strategic goals of the organization. Heavy equipment transportation services in the era of globalization are expected to face increasingly fierce competition. Therefore, the quality of the organization must be considered. This is inseparable from the role of human resources who will be required to carry out their duties and functions properly. The purpose of this research is to examine and analyze job insecurity, compensation, and work conflicts on the turnover intention and the employe performance. This study employs samples consisted of all employes who work at PT. Tangguh Jaya Bersama with a total population of 50 employees. The results indicate that variable job insecurity, and work conflicts have a positive and significant impact on turnover intention. Whereas the compensation has a negative and significant on turnover intention. The variable compensation and work conflicts have a significantly positive on employee performance, whereas the jobs insecurity have a significantly negative on employee performance. The variable turnover intention has a significantly negative on employee performance.
Natural Frequency Analysis of a Jeffcott Rotor Having Stepped Shaft
Authors: Alahmadi Ahmed A. , Alnefaie Khalid A. , Diken Hamza
Published: May 2021

The Rotating shafts are mechanical elements used to transmit power or motion. A shaft with a step or steps is widely used instead of a shaft with a fixed (non-variable) diameter when operating at high speeds. The aim of this research is to study the effect of the step amount and its location in the shaft on the natural frequencies of the Jeffcott rotor model. Analytical methods are used to find an approximate formulation to obtain the natural frequencies of the Jeffcott rotor model neglecting the shaft mass. Lagrange equations are used to develop dynamic equations assuming elastic shaft with steps carrying a disk. The finite element method by using ANSYS is used to validate and compare the results obtained in the analytical method. The results obtained analytically and numerically were compatible and in good agreement. In addition, some parameters such as the step amount and the stepped shaft length are changed to check its effects on the natural frequencies. the results showed that the natural frequencies increase with an increase in the amount and length of the stepped part, while they decrease the closer the disc position to the center.
Effect of Potassium Permanganate on Colour and Textural Characteristics of Tomatoes at Ambient Temperature Storage
Authors: Wabali Victor C. , Esiri Akpevwe
Published: May 2021

Mature unripe tomato fruits were evaluated to check the effectiveness of potassium permanganate on the quality parameters of colour and texture under ambient storage conditions in extending the shelf life of tomatoes. 50 g each of mature unripe tomato fruits were weighed into a plastic container containing different concentrations of potassium permanganate including control (2.5 ppm, 5.0 ppm, 7.5 ppm, 10.0 ppm, 12.5 ppm and 15.0 ppm). The experiment was laid out in a complete randomized design and replicated four times. A sensory evaluation of quality parameters of color and texture was carried out using a hedonic scale ranking.

Results obtained were analyzed using analysis of variance and Least Significant Difference (LSD). Under ambient conditions, the tomatoes samples that were stored with a concentration of 5 ppm of KMnO4 showed a higher or acceptable quality in terms of colour and texture.

In terms of shelf life, 7.5 ppm of KMnO4 under ambient conditions, kept the tomatoes in an acceptable quality for 11 days as shown in the result.
Protection of River Sitnica From Urban Wastewaters
Authors: Kajtazi Besime Sh. , Floqi Tania
Published: May 2021

Wastewater treatment is a growing problem in Kosovo. Pollution from urban wastewaters poses the greatest pressure on Kosovo rivers and their better management represents an important area of improving their ecological status. Kosovo is lacking behind in terms of achieving certain goals and implementing European Environmental Directives, especially the Water Framework Directive and Urban Wastewater Treatment Directive. The lack of wastewater treatment prior to their discharges into receiving waters presents a gap in the water sector which needs to be addressed in order to meet European standards. Kosovo, as a country with a European perspective, must approach this issue as soon as possible. According to the reports of water utilities companies, the level of sewerage services in the country is 65% while the level of wastewater treatment is 0.7% [3]. The National Water Strategy [1] aims at protecting water resources through treating wastewater before returning to the nature. According to this strategy, a number of wastewater treatment plants and accompanying infrastructure for main cities should be build. River Sitnica is main river stretching in Kosovo valley, where main urban areas are located including capital Prishtina. With aim of protection the quality of river Sitnica, a study for collection of sewage and wastewater treatment plant for capital Prishtina was prepared and its findings will be presented in this article.
Rethinking Russian Foreign Policy towards Africa: Prospects and Opportunities for Cooperation in New Geopolitical Realities
Authors: Haruna Abdallah Imam , Abdul Salam A.
Published: May 2021

Diplomatic ties between Africa and the Russian Federation dates back to Africa’s dark decades of collective struggle for continental decolonization and severance in relations with its European colonizers. There is a vestige of historical evidence to support the claim that Russia had contributed immensely to this struggle in the early 1950s. Historically, the Russian Revolution of 1917 set the stage for the strenuous global struggle against colonialism and imperialism. This revolution, subsequently, inspired leaders of the nationalist movements on the African continent like Kwame Nkrumah of Ghana, Nnamdi Azikiwe of Nigeria, Haile Selassie of Ethiopia, Nelson Mandela of South Africa and Kenneth Kaunda of Zambia, among others to champion the fight for the liberation of Africa. Between 1945 and 1991, international politics was in a hegemonic geopolitical tension between the Soviet Union and the United States and their respective global allies. This power struggle polarized the world into the contrasting ideologies of Capitalism and Socialism. Some African nationalists situated the crusade for self-rule within the Eastern Bloc led by the Soviet Union. The collapse of the USSR on 26 December 1991 and the fall of the Berlin wall on 9 November 1989 heralded a new era in global politics. This paper is on the assumption that three decades into the demise of the Soviet Union, it is now time to reflect on the influence of Russia in international politics, with particular focus on Moscow’s foreign policy towards Sub-Saharan Africa. This rethinking is crucial because of the criticism that Russia’s renewed interest in Africa is a grand strategy to dominate affairs of the continent, rather than a search for new opportunities for economic cooperation and geopolitical alliances.
Does TPACK Mastery Affect Teamwork Skills? A Causal-Comparative Study of Pre-Service Physics Teachers
Authors: Guntara Yudi , Hafid Tubagus , Sari Indah Fatika
Published: May 2021

Physics teachers need to mastery TPACK and teamwork skills because they were essential in work. The purpose of this study was to determine the relationship between TPACK mastery and teamwork skills. The research method used a causal-comparative. The sampling technique used was purposive sampling. The sample consisted of 33 preservice physics teachers from Universitas Sultan Ageng Tirtayasa and Universitas Mulawarman. The data collection method used a questionnaire and an instrument in the form of a questionnaire with a Likert scale in a web-based survey. This instrument is used to measure TPACK and teamwork skills. Data analysis techniques used Pearson's correlation and regression analysis. The results showed no significant relationship between mastery of TPACK and teamwork skills, as indicated by Pearson’s correlation value of 0.061 with a significance of 0.735. However, if further tested based on every aspect of the two variables, there is a significant correlation between technology knowledge (TK), technology content knowledge (TCK) on the mastery of TPACK, and communication aspects on teamwork skills. Based on the regression test, the result obtained more than 90%, the communication aspect of teamwork skills influenced by TK and TCK. Another finding is that the most dominant external factor that influences teamwork skills is gender
Extraction Ecology: Environment and People in the Anthropocene
Authors: Yadav Chesta
Published: May 2021

The uncontrollable pursuit of growth and benefits has dominated our society. In developed part of the planet people live in energy phase of modernity but it is marked by instability of social situations and culture forms. It is often closely related to issues such as climate change, the disappearance of agro-biodiversity, or the loss of animal biodiversity. The extreme climate flux that human beings face today can be linked to the human continuous need for energy. The constant appetite to consume more and more energy has resulted in environmental degradation, like collapsed impoundment dams, floods, dead zones in forests. It has not only affected the environment but also people. It has given rise to unemployment, crippling poverty, and diseases such as black lung disease. This paper operates at the intersection of ecocriticism and extractive fiction studies to study the impact of mining by examining The Upheaval by Pundalik Naik. By applying the theory of ecocriticism, this paper will study and highlight how these places are rich in resources but are places of environmental degradation, public health issues, poverty and social conflict.
Antimicrobial Activities of Bioactive Compounds from Jatropha curcas
Authors: Octarya Zona , Refelita Fitri , Rahim Novia
Published: May 2021

Jatropha curcas L is widely planted in people's homes. Jatropha has many bioactive compounds, including flavonoids, saponins, tannins, and alkaloids. In this research, phytochemical tests and antimicrobial activities of sap and water extraction of Jatropha curcas L leaves on Candida albicans, Aspergillus, and Pseudomonas aeruginosa were carried out. The results of the phytochemical test of sap and water extraction of leaves showed positive results in the test of flavonoids, saponins, alkaloids and tannins. While steroid testing showed negative results. The antimicrobial capabilities of sap and water extraction of leaves to Aspergillus were 10.5 mm and 11 mm and to Pseudomonas Aeruginosa were 15 mm and 11 mm. Whereas the antimicrobial ability of sap and water extraction of leaf to Candida albicans was negative. In this case, it means that Pseudomonas aeruginosa is including microbes that are sensitive to antimicrobial origin of plants.
Making Bioethanol From Cocoa Fruit Skin Waste By Hydrolysis Process Using Trichoderma Viride Mold
Authors: Oktavianis Tiska , Sofiyanita Sofiyanita
Published: May 2021

Cocoa fruit skin is one of the agricultural wastes can be used as raw material for bioethanol production. Because the cocoa fruit waste containing 39.45% crude fiber and 3.92% glucose. The purpose of this study was to determine the level of optimization of yeast and fermentation time to produce maximum ethanol content. In this study the hydrolysis process cocoa leather is done using fungi Trichoderma viride and fermentation process using yeast Saccharomyses cerevisiae. While for bioethanol concentration measurements performed using vinometer. The results showed that bioethanol fermentation time for 1, 3, 5 and 7 days using yeast levels 2, 4, 6 and 8 grams produce maximum ethanol fermentation at 3 days and 6 grams yeast levels. Produced a maximum ethanol content of 12%.
Metal Organic Frameworks of CPL-4 and CPL-5 Synthesis and Characterization under Magnetic Fields
Authors: Zubir Moondra , Nasution Hafni Indriati , Syafei Minda Shafina
Published: May 2021

CPL-4 and CPL-5 were synthesized with used 2,3 pyrazine dicarboxylic acid as main ligand , 4,4’-azopyridine(Apy) as linker ligand for CPL-4 and 1,2-di-(4-pyridil)ethylene(Bpe) for CPL-5 in water-ethanol(1:1) and temperature 250C. Three methods used in various reaction time and dropping method to metal ion with no stir treatment and also stirring or shaking treatment. CPL-4 have no magnetic field effect shows same XRD pattern in all synthesis method. Otherwise, CPL-5 with used method#03 shows different XRD pattern in 0T and 6T. By changing concentration of Cu2+ to 0.02 M, 6T crystal also shown different XRD pattern if compared with 6T crystal with 2 hours to 1 hours reaction time. It indicate of changing reaction between Hpzdc and Bpe with metal ion or reactivity both of ligand with metal ion induce different route under 6T. This process may effect to new crystal structure during synthesis in 6T..
Ancient Structures of West Moana: Observing the Tombs, Mounds and Forts
Authors: Enari Dion , Lemusuifeauaali'i Elijah
Published: May 2021

This paper will observe three ancient structures of Western Oceania and analyze their social significance and historic impacts on the native civilizations therein, alongside their relationships with each other among Western Moana cultures. Additionally, this paper will focus primarily on the early kingdoms of Tonga, Sāmoa, Wallis and Futuna; exploring the native land structures of the Star Mounds and Pulemelei mound of Sāmoa, Fort Talietumu in ‘Uvea (Wallis) and royal burial tombs of the Tu’i Tonga in Lapaha, Tongatapu. As researchers who have genealogical links to these sights, we tell this story.
Desain Dan Simulasi Mesin Cnc Laser Cutting Untuk Produk Berbahan Akrilik
Authors: Syaifullah Mohamad
Published: May 2021

Penelitian ini bertujuan mendesain mesin CNC Laser Cutting bersifat portable, alat ini menggunakan laser sebagai alat potong untuk mengerjakan benda kerja, dengan ukuran laser berdiameter 0,02 mm, Metode penelitian yang digunakan untuk tahap perancangan yaitu melakukan studi literatur lalu menganalisa kebutuhan pembuatan mesin,memilih dan membandingkan beberapa alternatif desain, melakukan pemilihan konsep, perancangan  modul laser serta, perancangan sistem gerak 3 axis,  perancangan daya motor serta mensimulasikan frame dengan menggunakan metode elemen hingga.Hasil penelitian ini memperoleh skematik sistem kontrol mesin CNC Laser, menghasilkan prototype mesin CNC Laser, dan nilai parameter dari data-data hasil uji kinerja mesin CNC Laser dengan microcontroller CNC 3 aksis berbasis Atmega328 Arduino nano dengan modul laser 5,5 Watt dengan kapasitas maksimal bidang kerja 200x100x10. Hasil simulasi tegangan von mesis stress sebesar 0,07658 Mpa dan nilai von mises stress minimal 0 Mpa.l Kata kunci: Desain mesin cnc laser cutting
Desain Dan Simulasi Mesin Oven Kopi Tipe Tray Rotary Kapasitas 25 Kg
Authors: JAZULI YUSRON
Published: May 2021

Proses pengolahan kopi yang masih manual membutuhkan waktu lama,  terutama saat proses pengeringan kopi basah membutuhkan waktu 1 minggu. Proses pengeringan kopi yang di jemur dibawah sinar matahari bertujuan memisahkan biji kopi dari kulitnya. Proses tersebut dapat mempengaruhi kualitas kopi dan tidak maksimal pengeringanya saat musim hujan. Tujuan penelitian ini adalah perancangan mesin oven kopi tray rotary dengan bahan bakar gas LPG dapat mengeringkan kopi dengan kapasitas 25 kg untuk sekali pengeringan yang membutuhkan waktu 3 jam. Metode perancangan yang digunakan adalah studi literatur, analisa kebutuhan mesin, merancang konsep, menghitung rumus-rumus mesin, melakukan simulasi tegangan pada tray rotary. Perancangan gambar desain menggunakan software inventor 2015 serta simulasi. Hasil penelitian ini adalah rancangan mesin yang mampu mengeringkan kopi basah dengan suhu temperature pengeringan 50 - selama 3 jam dengan kadar air mencapai 13 %  Kata kunci : mesin oven,tray rotary,pengering kopi basah
VISUALISASI ALIRAN DUA FASA SOLID-GAS DI PIPA HORISONTAL DIAMETER 15,8 MM DAN 24,5 MM PADA MESIN PNEUMATIC CONVEYING
Authors: Musthofa Zaenal
Published: May 2021

Pipa adalah bagian terpenting pada sistem Pneumatic Conveying. Pipa  sebagai tempat aliran utama bahan yang akan dipindahkan dan juga salah satu faktor yang dapat mempengaruhi karakteristik aliran. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh diameter pipa terhadap karakteristik aliran solid-gas yang terjadi pada mesin pneumatic conveying.Metode penelitian yang digunakan untuk mengetahui karakteristik aliran solid-gas pada mesin pneumatic conveying yaitu dengan melakukan pengamatan secara visual fenomena yang terjadi pada aliran pipa dengan panjang aliran 6 m dengan diameter dalam 15,8 mm dan pipa diameter dalam 24,5 mm papa aliran horisontal menggunakan kamera FUJI XA-5 dengan kecepatan perekaman 30 sampai 120 fps (frame per second). Kecepatan interfisual udara diatur dari kecepatan 2-10 m/s, sedangkan kecepatan interfusial solid diatur dari kecepatan 0,1-0,5 m/s. pengamatan dilakukan pada jarak 4750 mm sampai 5250 mm dari pengumpan.Berdasarkan hasil penelitian, pengamatan kamera FUJI XA-5 berhasil mengkarakteristikan dan menunjukan pola aliran dua fase pada pipa horisontal dan dikembangkan peta pola aliran. Pengamatan ini menghasilkan pola aliran solid-gas yaitu, homogenous flow, dune flow, slug flow, dan packed bed. Aliran dua fase solid-gas ini ditandai oleh bayangan cahaya yang terdapat dicelah-celah partikel solid. Seiring dengan peningkatan nilai JS maka aliran akan membentuk seperti petumbuhan gelombang partikel terhadap dinding pipa. Sedangkan dengan meningkatnya nilai JG  maka aliran akan gelombang aliran akan menurun bahkan tidak ada gelombang aliran. Pengaruh kecepatan solid dan gas akan sangat mempengaruhi terjadinya pola aliran yang terjadi. Kata kunci: Pneumatic Conveying, aliran dua fase, aliran solid-gas
ANALISA PENGUATAN MATA PISAU MESIN PENCACAH SAMPAH ORGANIK DENGAN PROSES HEAT TREATMENT BERTINGKAT
Authors: Jaelani Mohamad Abdul , Sidiq Muhamad Fajar , Wilis Galuh Renggani
Published: May 2021

Garbage has been considered useless and disgusting. The problem of pollution due to the presence of waste requires processing and management to overcome it, one of which is composting. The waste chopper is a tool that makes it easy to destroy and speed up the composting process of organic waste. The progress of the industrial sector cannot be separated from the development of the tool industry or blacksmiths, both large and small. In the manufacture of blades or blacksmith himself experienced several problems, among many consumers who complains of sharpness and strength of the blades are manufactured. There are several factors that affect the sharpness and strength of the blades, including during the heat treatment process. This study used an experimental method with ST 41 steel as the material. Carburizing process using coconut shell charcoal powder at a temperature of 875 ℃, hardness test and wear test material and the salt water quenching media. The highest average hardness test value was produced by the carburising and hardening processes with a hardness value of 599.7 VHN, while the lowest wear test value was found in the carburising and hardening process, namely 0,0000767 mm³ / kg.m.
Identifikasi Problematika Evaluasi Pendidikan Karakter di Sekolah
Authors: Salirawati Das
Published: May 2021

Pencanangan pendidikan karakter telah dimulai sejak 10 tahun lalu. Namun, hasil pelaksanaanya di sekolah belum diketahui secara pasti, sehingga diperlukan identifikasi mengenai problematika evaluasi pendidikan karakter di sekolah. Artikel ini bersifat deskriptif mengenai identifikasi bagaimana cara mengevaluasi keberhasilan pendidikan karakter di sekolah dengan tepat, sehingga nilai-nilai karakter tersebut secara nyata terinternalisasi dalam jiwa anak didik, tertampilkan dalam perilaku yang baik, dan akhirnya muncul sebagai habit (kebiasaan) yang membudaya. Beberapa faktor penyebab tidak berhasilnya implementasi pendidikan karakter sampai saat ini adalah (1) belum adanya model evaluasi pendidikan karakter sebagai pedoman operasional dalam melakukan evaluasi pendidikan karakter peserta didik secara tepat, efisien dan efektif, (2) pendidikan terlalu menekankan pada aspek intelektual sebagai ukuran keberhasilan, sehingga pembentukan karakter yang baik terabaikan, (3) tidak adanya penerapan pendidikan karakter secara menyeluruh, melainkan sekedar memenuhi kewajiban mengajar, tanpa mengetahui bagaimana seharusnya, (4) anak belum mendapatkan model yang dapat menjadi teladan, dan (5) derasnya informasi yang diterima anak tanpa penyaring. Beberapa langkah evaluasi pendidikan karakter yang diusulkan untuk mengatasi masalah utama evaluasi pendidikan karakter adalah (1) mendefinisikan atau memberi makna secara khusus pada karakter yang akan dicapai, (2) elaborasi terhadap substansi makna yang terkandung dalam karakter tersebut melalui suatu hierarki perilaku: moral knowing, moral feeling, dan moral action, (3) menyusun indikator hasil belajar yang harus dikuasai oleh anak sesuai tahap perkembangannya, (4) menjabarkan indikator karakter menjadi indikator penilaian dalam bentuk rubrik.
LİSANSÜSTÜ ÖĞRENCİLERİNİN STEM EĞİTİMİ İLE İLGİLİ GÖRÜŞLERİ: İKİ ÜNİVERSİTE ÖRNEĞİ
Authors: KARSLI BAYDERE Fethiye , ŞAHİN ÇAKIR Çiğdem , HACIOĞLU Yasemin , KOCAMAN Koray
Published: May 2021

Bu araştırmanın amacı lisansüstü öğrencilerinin STEM eğitimi ile ilgili görüşlerini belirlemektir. Araştırmanın yöntemi durum çalışmasıdır. Araştırmanın çalışma grubu iki farklı üniversitenin fen bilgisi eğitimi ana bilim dalında lisansüstü eğitim gören toplam 10 öğrenciden oluşmaktadır. Veri toplama aracı olarak 10 sorudan oluşan yarı yapılandırılmış mülakat kullanılmıştır. Mülakatlardan elde edilen veriler içerik analizine göre çözümlenmiştir. Verilerin analizinde “STEM ile ilgili tanımlar”, “STEM eğitiminin uygulanmasının avantajları ve dezavantajları”, “STEM eğitim yaklaşımının diğer yaklaşımlarla olan benzerlik ve farklılıkları”, “STEM eğitimine yönelik öğrenme ortamlarının sahip olması gereken nitelikler” ve “STEM eğitim yaklaşımını uygulayacak öğretmenlerin sahip olması gereken nitelikler” kategorileri oluşturulmuştur. Verilerin güvenilirliğini sağlamak için birbirinden bağımsız olarak üç araştırmacı verileri kodlamışlardır. Kodlayıcılar arasındaki tutarlılık yüzdesi hesaplanmıştır ve kodlayıcılar arasındaki tutarlılık 0.85 olarak bulunmuştur. Verilerin geçerliliğini sağlamak için öğrenci ifadelerinden alıntılar sunulmuştur. Araştırma sonucunda lisansüstü öğrencilerinin STEM eğitimi ile ilgili daha çok olumlu görüş belirtmiş olmalarına rağmen yetersiz bir anlayışa sahip oldukları ortaya çıkmıştır. Ayrıca lisansüstü öğrenciler STEM eğitiminin ülkemiz şartlarında uygulanmasına yönelik tereddütleri olduğunu ifade etmişler ve STEM eğitiminin etkili bir şekilde uygulanmasına yönelik öneriler sunmuşlardır.
ARGÜMANTASYON TABANLI ÖĞRENME ORTAMLARININ SINIF ÖĞRETMEN ADAYLARININ KAVRAMSAL ANLAMALARINA ETKİSİ: GENETİĞİ DEĞİŞTİRİLMİŞ ORGANİZMALAR ÖRNEĞİ
Authors: ŞENEL ÇORUHLU Tülay , AKYÜZ Müzeyyen
Published: May 2021

Bu araştırmanın amacı; Genetiği Değiştirilmiş Organizmalar (GDO) konusunda Argümantasyon Tabanlı Öğrenme Ortamlarının (ATÖO) sınıf öğretmen adaylarının kavramsal anlamaları üzerine etkisini araştırmaktır. Araştırmada basit deneysel yöntemden yararlanılmıştır. Çalışmanın örneklem grubunu Trabzon’da Eğitim Fakültesi ikinci sınıfta öğrenim gören toplam 45 sınıf öğretmen adayı oluşturmaktadır. Araştırmada veriler; “kavramsal anlama testi” ve “yarı-yapılandırılmış mülâkat soruları” ile toplanılmıştır. Araştırma sonucunda; Argümantasyon Tabanlı Öğrenme Ortamları”nın sınıf öğretmen adaylarının GDO konusunda kavramsal anlamaları üzerinde anlamlı etkide bulunduğu sonucuna ulaşılmıştır (t(44)= -13,833; p
Type, prevalence, and risk factors for the development of orthopedic injuries in endurance horses during training and competition
Authors: Paris Angelo , Beccati Francesca , Pepe Marco
Published: May 2021

OBJECTIVE

To report the type, prevalence, and risk factors for the development of orthopedic injuries in endurance horses.

ANIMALS

235 endurance horses.

PROCEDURES

Medical records of horses examined between January 2007 and December 2018 were reviewed. Recorded data were birth; breed; sex; dates of first and last examinations; presence of any conformation fault, lameness, positive flexion test result, and orthopedic injury; starts in endurance competitions; level of athletic activity; professional status of trainer or rider; and whether an orthopedic injury developed in > 1 limb or during or within 2 days after competition, lameness resolved after treatment, reinjury occurred, horse was eliminated from competition after treatment, and the horse required retirement from endurance competitions. Anatomic locations of injuries were classified as proximal portion of the metacarpal area, midportion of the metacarpal area, metacarpo- or metatarsophalangeal (fetlock) area, tarsus, or foot. For each outcome, multivariable logistic regression models were developed after bivariable logistic regression and collinearity analyses.

RESULTS

351 orthopedic injuries were detected in 76.6% of the horses, with 27.1% that affected the fetlock area, 21.4% the proximal portion of the metacarpal area, 21.1% the foot, 12.8% the tarsus, 9.1% the midportion of the metacarpal area, and 8.5% other sites. High suspensory disease (21.4%) was the most common condition, followed by arthropathy of the metacarpo- or metatarsophalangeal joint (19.4%) and solar pain (14%). Age at first examination (OR, 1.70; 95% CI, 1.37 to 2.11), months of observation (OR, 1.03; 95% CI, 1.01 to 1.05), conformation fault of forelimbs (OR, 4.08; 95% CI, 1.53 to 10.89), and amateur status (OR, 2.62; 95% CI, 1.86 to 7.99) remained significant in the final multivariable regression model for the development of orthopedic injuries.

CONCLUSIONS AND CLINICAL RELEVANCE

A large number of endurance horses developed ≥ 1 orthopedic injury during training or competition. Clinical and diagnostic examinations should be focused with particular attention to the metacarpophalangeal joints, proximal portion of the metacarpal area, and foot.
Innate and acquired immune responses of colostrum-fed neonatal Holstein calves following intranasal vaccination with two commercially available modified-live virus vaccines
Authors: Midla Lowell T. , Hill Kevin L. , Van Engen Nicholas K. , Edmonds Matthew , Renter David G. , Streeter Marshall N. , Hutcheson John P. , Griebel Philip J.
Published: May 2021

OBJECTIVE

To compare immune responses induced by 2 commercially available vaccines with a bovine herpesvirus type 1 (BHV1) component following intranasal (IN) administration to colostrum-fed calves.

ANIMALS

90 male Holstein calves (ages, 5 to 14 days).

PROCEDURES

In a randomized complete block design, each calf received 2 mL (1 mL/nostril) of vaccine A (n = 30), vaccine B (30), or saline (0.9% NaCl) solution (30) on day 0. Blood samples were collected for determination of serum anti-BHV1 IgG titer, and nasal fluid (NF) samples were collected for determination of interferon (IFN)-α and IFN-γ concentrations and for secretory IgA titers against BHV1, Mannheimia haemolytica, and Pasteurella multocida at predetermined times for 42 days after vaccination.

RESULTS

All calves were seropositive for anti-BHV1 IgG, and the mean anti-BHV1 IgG titer did not differ significantly among the 3 groups at any time. Both vaccines induced significant transient increases in NF IFN-α and IFN-γ concentrations. On day 5, mean IFN-α concentration and the proportion of calves with detectable IFN-α concentrations for the vaccine A group were significantly greater than those for the vaccine B and control groups. On day 42, the mean NF anti–P multocida IgA titers for both vaccine groups were significantly greater than that of the control group.

CONCLUSIONS AND CLINICAL RELEVANCE

Both vaccines induced innate and acquired immune responses in calves with colostral antibodies. The magnitude of the IFN-α response and proportion of calves with detectable IFN-α differed between the 2 vaccine groups. Both vaccines appeared to enhance the IgA response against P multocida.
Successful and unsuccessful nonsurgical removal of ingested golf balls and an artificial egg in four rat snakes (Pantherophis alleghaniensis)
Authors: Scott Gregory , Waffa Bradley J. , DeVoe Ryan S. , Harms Craig A. , Lewbart Gregory A.
Published: May 2021

CASE DESCRIPTION

4 wild adult rat snakes (Pantherophis alleghaniensis) were evaluated after ingesting spherical or ovoid foreign bodies.

CLINICAL FINDINGS

Physical examination revealed a large, firm mass at the level of the stomach in each snake. Radiographic findings were consistent with ingestion of a golf ball (3 snakes) or an artificial egg (1 snake). Signs consistent with prolonged impaction included scale loss, dermal abrasions, and apparent loss of body condition in one snake and regional skin ulceration, dehydration, and generalized muscle atrophy in another.

TREATMENT AND OUTCOME

Nonsurgical removal of the foreign body was attempted in anesthetized or heavily sedated snakes by external manipulation in the orad direction. A golf ball was removed through the oral cavity without complications in 1 snake. In the other 3 snakes, tension caused by the advancing foreign body resulted in full-thickness skin rupture in the cervical region. The procedure was completed with the use of a balloon catheter to aid foreign body advancement for 1 of the 3 snakes, and the skin defect was closed. The procedure was converted to esophagotomy for the other 2 snakes. Three snakes recovered and were released; 1 died of complications from prolonged impaction and esophageal perforation.

CLINICAL RELEVANCE

The described nonsurgical techniques for removal of ingested round or ovoid foreign bodies were associated with substantial complications in 3 of 4 treated rat snakes. Although a nonsurgical method for removal of ingested objects such as golf balls could benefit snakes, the methods used for these patients did not appear to be more beneficial than traditional gastrotomy.
Thermodynamic prediction of proton and hydrogen atom abstraction in dehydroascorbic acid and its bicyclic form
Authors: Štellerová Dagmar , Lukeš Vladimír
Published: May 2021

Conformation analysis of dehydroascorbic acid and its bicyclic form was performed using the density functional theory. For the energetically preferred conformations, ionization potentials (IP) and bond dissociation enthalpies (BDE) were calculated using the B3LYP functional and 6-311++G** basis set. The effects of aqueous solution were estimated using the solvation model based on density (SMD) and the polarizable continuum model (IEF-PCM). The obtained results were compared with available experimental data for reference L-ascorbic acid (vitamin C). Our calculations indicate that the investigated bicyclic metabolic product of vitamin C can also exhibit limited radical scavenging ability due to the thermodynamically preferred dissociation of tertiary —CH bonds.
Attribute Reduction Method Based on Sample Extraction and Priority
Authors: Wang Biqing
Published: May 2021

Attribute reduction is a key issue in the research of rough sets. Aiming at the shortcoming of attribute reduction algorithm based on discernibility matrix, an attribute reduction method based on sample extraction and priority is presented. Firstly, equivalence classes are divided using quick sort for computing compressed decision table. Secondly, important samples are extracted from compressed decision table using iterative self-organizing data analysis technique algorithm(ISODATA). Finally, attribute reduction of sample decision table is conducted based on the concept of priority. Experimental results show that the attribute reduction method based on sample extraction and priority can significantly reduce the overall execution time and improve the reduction efficiency.
Jets and the variational calculus
Authors: Saunders David J.
Published: May 2021

We review the approach to the calculus of variations using Ehresmann’s theory of jets. We describe different types of jet manifold, different types of variational problem and different cohomological structures associated with such problems.
On the Mathematical Theory of Records
Authors: Stepanov Alexei
Published: May 2021

In the present work, we briefly analyze the development of the mathematical theory of records. We first consider applications associated with records. We then view distributional and limit results for record values and times. We further present methods of generation of continuous records. In the end of this work, we discuss some tests based on records.
Development of student simulated patient training and evaluation indicators in a high-fidelity nursing simulation: a Delphi consensus study†
Authors: Yuan Hao-Bin
Published: May 2021

Objective

This study is aimed to develop student simulated patient (SSP) training content and evaluation indicators, and further explores their validity and reliabilities.

Methods

Delphi consultations with 20 nursing experts were conducted. The weights of indicators were calculated through the analytic hierarchy process. SSP training was conducted with a high-fidelity nursing simulation.

Results

The expert positive coefficients were 0.952 in the first round consultation and 1.00 in the second round consultation. The expert authority coefficient was reported as 0.87. The training included role and responsibility of simulated patient (SP), script interpretation, plot performance, and training for a rater, with a total of 17 indicators. SSP evaluation consisted of disease knowledge, role portrayal, and performance fidelity and since being a rater, it consists of 20 indicators in total. The coordination coefficients of two rounds of consultation ranged from 0.530 to 0.918. The content validity of SSP evaluation indicators was 0.95. The inter-rater reliability was reported as 0.866, and the internal consistency established using Cronbach’s α was 0.727.

Conclusions

Students as SPs should have first-hand knowledge and experience within the simulated scenarios. SSP training content and evaluation indicators were determined through the Delphi consensus combined with analytic hierarchy process. The evaluation indicators were valid and reliable, and provided the objective and quantifiable measurements for SSP training in nursing.
How sport and its values are perceived by adults in the USA and Ukraine: a cross-cultural comparison
Authors: Turchyk Iryna , Romanchuk Olha , Sorokolit Natalija , Kemin Volodymyr , Lukjanchenko Mykola
Published: May 2021

There are practically no cross-cultural studies in the field of physical education and sport with Ukrainian society as the object of research. However, there is a particular and obvious interest to research not only young people as a major strategic resource for any state, but also adults, including parents. The main purpose of the study is to identify common and different features of the attitude toward sport and its axiological component in the Ukrainian and American societies. A total of 500 adults aged 18-64 (196 men and 304 women) participated in the national survey, with the majority being Ukrainian school teachers. The results obtained from the study were compared with the results of a study conducted in the United States. It should be noted that in our study, we only selected questions from the American questionnaire that solely addressed adults’ perceptions of sport and its values. We did not choose other questions. Mathematical processing of the survey indicators was carried out using the computer program SPSS. The result of the research is a comparison of statements from adults of both countries regarding the actual and potential impact of social institutions on the youth; their statements about sport; values or principles that may or may not be important in sport; the extent of sport’s actual influence on the formation of values; the values adults hope their children will learn from participating in sport; and statements about the importance of values from adults who are actively involved in sport. The results of the cross-cultural study among adults in the USA and Ukraine indicate that there is both an identical idea of certain values in sport and a different vision due to, in our opinion, the divergence of cultural traditions and the status of sport in the countries.
Cerebral Gas Embolism in the Course of Mildly Symptomatic Pulmonary Barotrauma in a Scuba Diver
Authors: Kierznikowicz Brunon , Teresiński Stefan
Published: May 2021

The paper presents a case of pulmonary barotrauma in a scuba diver. Swallowing water and respiratory arrest during the ascent caused the trauma. Symptoms from the respiratory system (including the Behnke’s symptom) appeared several minutes after the completion of the dive and were not severe. However, symptoms from the peripheral nervous system, which appeared later, increased rapidly until the seizure episode and loss of consciousness. Hyperbaric treatment was applied in a decompression chamber on board the ship from which the dive was conducted. The treatment resulted in complete remission of symptoms without any consequences.
Diver Poisoning with Contaminated Compresses Air
Authors: Olszański Romuald , Mamet-Ossowska Elżbieta
Published: May 2021

The paper describes the case of a military diver who suffered from a complicated poisoning caused by hydrocarbons contained in his breathing air. The hydrocarbons came from a malfunctioning compressor which was used to fill the diving cylinders; the compressor sucked in the exhaust gases of its own motor. Exhaust gas poisoning was further complicated by hypoxia and hypercapnia as the diver spat out the mouthpiece and started to breathe from inside the suit. This resulted in a loss of consciousness. The diver was extracted to the surface and was given oxygen to breathe. The course of treatment was successful. On the same day, symptoms of exhaust gas poisoning occurred in several divers using cylinders filled with the same compressor.