bluuebunny/crossref_metadata_2025 huggingface dataset:
Cirugía colorrectal laparoscópica en un centro privado de Bahía Blanca
Authors: Beder Damian , Caballero Rueda Ayelén , Amondarain Melisa , Rodriguez Gomez Matias , Zueedyk Mario Jorge
Published: May 2022

Introducción: La cirugía laparoscópica es una vía de abordaje fundamental para el tratamiento de la patología colorrectal.  Se debe evaluar si los resultados de centros de referencia pueden ser reproducidos por centros de menor volumen con cirujanos entrenados en laparoscopía.

Objetivo: Analizar resultados a corto plazo obtenidos con el abordaje laparoscópico de la patología colorrectal, factores asociados a conversión y reoperación.

Diseño: Cohorte, retrospectivo.

Materiales y Métodos: Pacientes tratados por  laparoscopía entre Octubre 2014 y Agosto  2020 en un Hospital Privado de la Ciudad de Bahía Blanca; excluyendo cirugías de urgencia, tumores de ano y patología combinada. Conversión, readmisión y morbilidad fueron analizadas en base a las variables demográficas, técnica quirúrgica y curva de aprendizaje. Análisis multivariado para conversión y reoperación.

Resultados: 167 pacientes, 51,5 % hombres, edad media 66,1 años, IMC promedio de 26,5 km/m2, estadía hospitalaria 4 días, conversión 5,4%.  Tiempo operatorio 231,27 minutos, siendo significativamente mayor para los tumores de recto (p<0,001). Se reoperó el 9,6% y se reinternó el 16,8% de la población. 26% de los pacientes presentaron complicaciones postoperatorias menores (Clavien I-II) el y 16% mayores (Clavien III-IV-V), siendo las más frecuentes: infección del sitio quirúrgico (21%), íleo (13,8%) y fístula anastomótica (7,8%). Mortalidad 3,6%. Se complicaron más los pacientes con ASA ≥3 (p=0,015) y sexo masculino (p=0,01). Pacientes complicados con fístula anastomótica se reintevinieron más que el resto (p<0,01), siendo esta complicación un factor predictivo de reoperación. Tienen más chance de conversión los pacientes masculinos y cirugía RAUB.

Conclusiones: El abordaje laparoscópico de la patología colorrectal en nuestro medio demostró ser un procedimiento eficaz y seguro que permite cumplir con los estándares de resultados a corto plazo establecidos por la comunidad científica. Los pacientes masculinos y las cirugías RAUB tienen más chance de conversión. La fístula anastomótica es un factor predictivo de reoperación.
Las orientaciones motivacionales y el logro de las metas académicas en estudiantes de la Unidad Educativa Manuela Cañizares
Authors: León Rancisca Cecilia Espinosa , Rosales Jorge Antonio Piedra , Madrid Soraya Del Pilar Carranco
Published: May 2022

La relación entre las metas académicas y el desarrollo escolar en los estudiantes de Educación Básica Media y Superior de la Unidad Educativa Manuela Cañizares surgió como inquietud  de algunos docentes en la culminación del período 2019 – 2020 se aplicó el Cuestionario de Metas Académicas, que consiste en 20 afirmaciones planteadas para explorar el tipo de metas de los estudiantes y su comportamiento durante el proceso de aprendizaje; se contestan usando una escala de alternativas tipo Likert. Evalúa tres orientaciones motivacionales: metas de aprender o de aprendizaje, metas de refuerzo social y metas de logro. Para el análisis se aplicó un diseño descriptivo de corte transversal con la aplicación del “t de students” y la participación de 203 estudiantes del octavo año de EGB hasta 3ero de bachillerato. Los resultados de las metas de aprendizaje, logro, refuerzo social deben ser consideradas en las instancias de planificación institucional.
Management effectiveness in national parks from Peru
Authors:   , Toro Arlan Jack Coronel
Published: May 2022

The unsustainable exploitation of natural resources in protected areas has increased globally and at an accelerated rate in the 21st century, mainly in tropical regions such as South America. This scenario has worried the scientific community, due to the risks of loss of biodiversity and ecosystem functions, while at the same time there is a growing urgency for the inspection and maintenance of these areas. In this context, the central objective of this work was to evaluate the management effectiveness of national parks in Peru. For this, the scenario matrix was used, which is based on the application of a questionnaire to park managers. The methodology establishes possible scenarios based on a set of indicators, thus generating the result of park management effectiveness (unsatisfactory to satisfactory). Most parks (6 or 55%) showed medium management effectiveness and 45% (5 parks) of the parks showed satisfactory management effectiveness. The effectiveness found is explained by the positive performance of the indicators expropriation, relationship with the surroundings, protection and inspection programs, and management plan. Also, there is no significant difference in the importance of the indicators for the final answers on the effectiveness of park management. Our results indicate that Peru's national parks are currently well managed. However, some indicators need to be improved, especially for parks that showed medium management effectiveness. Furthermore, this study can help managers to maintain and allocate financial resources in protected areas with greater precision, since the scenario matrix methodology allows the identification of low performance indicators. Keywords: Protected natural areas. Scenario matrix. Performance indicators.
Contribution to the Assessment and Prediction of Companies’ Tax Risks in the Administration of Tax
Authors: Samara Bayoma Wili , Kounetsron C Yao Messah
Published: May 2022

Tax risk management requires an adequate assessment of the risk based on previously identified determinants. The main objective of this article is to design a tax risk prediction tool. To achieve this objective, data were collected from about sixty big companies in Togo. The scoring method first identified tax risks determinants and then assessed and predicted that risk. The results show that in Togo, company size, transfer price, the leverage effect, the sector of activity, and the reputation of the accounting auditing firm negatively affect big companies’ tax compliance. In contrast, total indebtedness, foreign shareholders’ presence and tax incentives have a positive impact on their tax behaviour. With a predictive power of 75 per cent, this research empirically verifies that modern risk assessment methods improve the performance of the tax administration control system. Consequently, the Togolese Revenue Authority should focus on strengthening its control mechanism for big companies, particularly those involved in the financial sector. It should further prioritise the use of statistical and econometric methods to assess tax risk. However, an error margin of 25 per cent suggests the existence of other factors which could likely improve the appropriateness of the results.
Using Digitalisation Approach to Optimising Potential Property Tax Revenues in the Democratic Republic of Congo
Authors: Butindi Luc Mwenelwata
Published: May 2022

Optimising property tax is beneficial for real estate investors but can also encourage tax avoidance and fraud by economic operators if the state does not put safeguards in place to secure its rights. On the one hand, the state must first control the number of buildings per category and identify the property owners to be taxed. Thanks to digitalisation, tax administrations will change the current approach in favour of modern management tools such as those used in other countries. On the other hand, the state must encourage investors to build more apartment buildings in third- and fourth-tier localities to benefit from the tax relief associated with these properties. These proposed solutions, which are supported by figures from the city of Kinshasa, are used as an example and presented in this article. It highlights that this approach allows the two stakeholders (tax administration and taxpayers) to mutually benefit while effectively reducing the behaviour at fault.
Pengaruh Kualitas Pelayanan Tokopedia terhadap Kepuasan Konsumen pada Pengguna Tokopedia di Surabaya
Authors: Sari Sindi Kurnia , Andarini Sonja
Published: May 2022

Currently, business development has led to the digital economy or online market due to changes in people's shopping styles, which have begun to shift from offline shopping to online shopping. This is an opportunity for business actors to market their products through digital media such as e-commerce. E-commerce facilitates communication between sellers and buyers, facilitates marketing and product promotion activities by sellers, facilitates the sale and purchase transaction process, facilitates payments made by consumers because it can be done online. This study was shown to analyze the effect of service quality on Tokopedia consumer satisfaction in Surabaya. The variables used in this study are service quality which consists of efficiency, system availability (reliability), fulfillment, confidentiality (privacy), responsiveness (responsiveness), compensation (compensation), contact (contact). And the variable of consumer satisfaction which consists of the suitability of expectations, loyalty, interest in visiting again and willingness to recommend. This study uses a survey method by distributing online questionnaires to 100 Tokopedia users in Surabaya. Based on the data analysis, it can be concluded that service quality has a positive and significant effect on Tokopedia consumer satisfaction in Surabaya.
Pengaruh Perilaku Konsumen terhadap Keputusan Pembelian Tiket Pesawat Secara Online pada Situs Tiket.Com Periode 2021
Authors: Aliah Anisa Ul , Riananditasari Nanik
Published: May 2022

Transactions in shopping are things that cannot be separated from the community in order to carry out life. Judging from the transaction process carried out in the era before digitization, it required consumers to come to see the seller in order to get the goods or services they needed and wanted. With digitalization happening on a large scale in the community, it can facilitate the transaction process for consumers. There are many factors that can have an impact as a result of this extraordinary change, these factors include cognitive, cultural, social and personality factors of a person. This study is intended to find out changes in attitudes in individuals due to online flight ticket transactions on the tiket.com website. The quantitative approach acts as the method used in this study with the support of a simple regression analysis step. The sample used in this study was 100 samples. The conclusion of this study shows that the number of individual attitudes has a relevant impact on the choice to make transactions to buy airline tickets online on the tiket.com website. Thus it can be proven from the value in a simple linear regression analysis worth, Y = 2.762 + 0.306X. This value shows that consumer attitudes have a good impact on the choice to buy, which is worth 59%.
E-commerce, Inovasi, Pricing, dan Pendapatan UMKM di Masa Pandemi Covid-19
Authors: Pramelia Noansa , Erawati Teguh
Published: May 2022

The purpose of this study was to determine the effect of e-commerce,  innovation, and pricing on MSME income during the COVID-19 pandemic. The population of this research is MSME actors in Kulon Progo Regency. The method in this research is descriptive quantitative method. The sampling technique used was convenience sampling with a total of 101 respondents. Data was collected by distributing questionnaires in the form of a google form link. The data analysis technique used is multiple linear regression model. Based on the results of hypothesis testing in this study partially shows that the e-commerce variable has an effect on income. The innovation variable has an effect on income. The pricing variable has an effect on income. The results of the simultaneous test show that the calculated F value > F table is equal to (35.641 > 2.69) and a significance level (0.000 < 0.10) so it can be concluded that the variables of e-commerce, innovation, and pricing simultaneously have a positive and significant effect on revenue. SMEs. Judging from the results of the coefficient of determination R^2, 51% of MSME income is influenced by e-commerce, innovation, and pricing variables, while the remaining 49% is influenced by other factors not involved in this study..
The Risk Management E–Bekal to Improve Services to Students at Nurul Jadid Islamic Boarding School
Authors: Saifuddin Saifuddin , Fathony Alvan , Habibullah Mohammad
Published: May 2022

The digital economy has changed the global economy with the existence of electronic money which is currently a very popular average payment that is used by all circles, especially among Islamic boarding schools. Nurul Jadid Islamic Boarding School is one of the boarding schools that implements electronic money (e-money) as a medium of payment, although in its use there are still many obstacles and risks. This study wants to know and analyze what are the risks involved in the use of electronic money and how to overcome them. The method used in this research is descriptive qualitative with a phenomenological approach and data collection. The results of this research conclude that the use of electronic money makes it easier for students to make transactions even though there are still risks and obstacles in their use, in this case the Islamic boarding school tries to overcome this problem, the aim is to improve services to students.
Pengembangan Komunitas Entrepreneur Berbasis Social Entrepreneurship Melalui Program Greenthink
Authors: Rizkiyah Habibatur , Su'ib Moh Syaiful
Published: May 2022

The abundance of marine catches with low selling prices is the cause of the decline in people's income levels. The entrepreneurial community based on social entrepreneurship is one of the solutions in solving the social and economic problems of the community. This study aims to find out about the development carried out in the entrepreneurial community based on social entrepreneurship through the Greenthink program. Data collection techniques were carried out through observation, interviews and documentation, the research was analyzed through a descriptive qualitative approach. The results of this study indicate that the process of developing an entrepreneurial community based on social entrepreneurship through the greenthink program is carried out through several stages of assistance starting from product manufacturing training, product packaging and product marketing accompanied by continuous improvements as upgrading in running a business and to create a fish processing center in Indonesia. Probolinggo Regency. The development carried out through the greenthink program has succeeded in making the entrepreneurial community of the Karanganom assisted group experience a fairly good development in terms of the quality of human resources and the business they run.
INFORMALITY AND TOTAL FACTOR PRODUCTIVITY IN KENYA
Authors: Opondo Mary , Etyang Martin , Ayieko Onono
Published: May 2022

Purpose: The Kenyan economy is largely informal. The objective of the study was to establish the effect of size of the informal sector on total factor productivity in the country.

Methodology: The study was based on the dualist theory of the economy. Data covering the period 1974 to 2016 was sourced from government publications (Economic Surveys and Statistical Abstracts), the Global Financial Development Database and the World Development Indicators. A growth accounting exercise was conducted using the Cobb-Douglas production function based on the Solow growth model. This enabled the decomposition of output growth to the contributions of labour and capital with a residual, commonly referred to as the total factor productivity which was the dependent variable in the study. The study was non-experimental and utilized a longitudinal research design using macro-level data thus limiting the possibility of data manipulation. Various theoretically and empirically recognized determinants on TFP were included as control variables. The analysis was conducted using ordinary least squares.

Findings: The findings show that the size of the informal sector has a negative and statistically significant effect on total factor productivity in Kenya. Given the large informal sector, the study concluded that there is need to increase productivity of the sector in the country for improved economic performance.

Unique contribution to theory, practice and policy: From the study findings, the informal sector has a negative and statistically significant effect on total factor productivity in Kenya. The study recommends the development and implementation of policies to enhance productivity in the sector. These include market and technological development, improved infrastructure and access to credit facilities.
Perbandingan Sistem Resirkulasi dan Air Mengalir Untuk Pembesaran Lobster Pasir (Panulirus Homarus): Kajian Dinamika Kualitas Air
Authors: Prastowo Bambang Widyo , Bond Manja Meyky , Senggagau Betutu
Published: May 2022

Aquaculture with the Recirculation Aquaculture System (RAS) is a unique engineered ecosystem that minimizes environmental disturbances by reducing the discharge of nutrient pollution through reuse of water used in fish farming. This activity was conducted at LP2IL Serang field test facility starting in June-November 2020. In this test, the RAS system used for growing of sand lobster uses the stages of purification: sedimentation, physical filtration, biological filtration, water disinfection with UV irradiation, removal of CO2, clean water reservoirs and sand lobster rearing tanks. Water quality parameters tested: a) physics: DO, pH, temperature and salinity are measured every day; b) chemistry: ammonia (TAN and UIA), nitrite, nitrate and phosphate are measured every two weeks. If from the UIA value calculation, the value is above the quality standard (> 0.05 mg / L) then added molasses (26.02% organic C) with a concentration of 64 gr / gr TAN; c) microbiology: total bacteria and Vibrio sp. counting. From the results of this study it is known that RAS can maintain stable water quality for a relatively long time. High availability of organic matter (from leftover feed, feces and addition of molasses) can promote the growth of nitrifying bacteria. The "maturation" of the nitrifying bacteria in the biofilter compartment takes about 6 weeks. These bacteria are able to reduce levels of ammonium nitrogen, where the accumulation of nitrate nitrogen (NO3-) which is produced from the overhaul of nitrite nitrogen (NO2-) by nitrifying bacteria, is a signal that the maturation process of nitrifying bacteria has been achieved. The nitrification process consumes alkalis, hence lowers the pH value in the water, besides it also consumes a large amount of oxygen. The low number of bacteria and vibrio in the RAS system was affected by the use of a UV-sterilizer with a wavelength of 254 nm.
Virtualistikaning ta’lim tizimida tutgan o‘rni
Authors: Shukurova Dildora
Published: May 2022

Ushbu maqolada virtuallik tushunchasining ma’nosi yoritilgan. Axborotlashgan jamiyatda virtual obrazlar va virtual reallik ta’siri to‘g‘risida ilmiy ma’lumot berilgan. Virtuallik tushunchasining tarixiy taraqqiyoti yoritib berilgan.
Meningkatkan Hasil Belajar IPS Kelas III SD Negeri 84 Lubuklinggau Menggunakan Model Learning Together
Authors: Sumilah Sumilah
Published: May 2022

Hasil belajar siswa pada mata pelajaran IPS kelas III di SD Negeri 84 Lubuklinggau masih rendah. Hal ini diperkuat dengan nilai Ulangan Akhir Semester (UAS) dari beberapa siswa pada mata pelajaran IPS yang belum memenuhi kriteria ketuntasan minimum (KKM). Diketahui bahwa rata-rata siswa berada pada rentangan 60-75. Rentangan tersebut masih di bawah 70. Jika dikoversikan terhadap PAP (Penilaian Acuan Patokan), rentangan tersebut berada pada kategori kurang. Penelitian ini merupakan penelitian tidakan (action research), karena penelitian dilakukan untuk memecahkan masalah pembelajaran di kelas. Didalam pelaksanaan ini mengacu kepada rancangan beberapa siklus I dan II meliputi perencanaan, pelaksanaan, observasi dan refleksi. Berdasarkan uraian yang telah disampaikan pada pelaksanaan Penelitian Tindakan Kelas di Kelas III SD Negeri 84 Lubuklinggau dapat disimpulkan bahwa model Learning Together dapat meningkatkan hasil belajar siswa tentang Kerja sama, peningkatan ini terlihat dari hasil belajar siswa pada pra siklus 4 siswa tuntas (21,05%) meningkat pada siklus 1 menjadi 11 siswa tuntas (57,89%) dan pada siklus 2  berhasil meningkat menjadi 17 siswa tuntas (89,47%).
Development of Polyculture Engineering Technology on Milkfish and Mud Crab Farming
Authors: Samidjan Istiyanto , Rachmawati Diana , Har Riyadi Putut
Published: May 2022

The current study aimed to evaluate the role of polyculture engineering technology on milkfish and mud crab farming and observe the growth and survivability of different milkfish and mud crab combinations. The study used milkfish, which was received artificial feed containing 35 % protein content enriched with vitamin E (3%/biomass/day). The study used completely randomized design with 4 treatments (n = 3): T1 = 5 milkfish + 5 mud crab, T2 = 10 milkfish + 5 mud crab, T3 = 5 milkfish + 10 mud crab, T4 = 10 milkfish + 10 mud crab. The following parameters were measured: absolute weight growth, survival rate, feed conversion rate (FCR), and water quality. The difference in the density of milkfish and mud crabs significantly affected (p < 0.05) the growth and survivability of milkfish and mud crabs. The polyculture cultivation system exhibited a significant increase in absolute weight growth of milkfish and mud crabs, which is the highest increase found in T4 treatment (187.85 g ± 0.9 g and 60.65 g ± 0.95 g, respectively). Meanwhile, the survival rate of milkfish and mud crab was 95% ± 0.3% and 95% ± 2.3%, respectively, followed by a lower FCR at T4 (1.54 ± 0.10). The water quality remained good for fish and mud crabs to survive. Milkfish and mud crab polyculture greatly affect the abundance of phytoplankton, demonstrating good community structure.
eNAM: A Potential Game Changer for Agriculture Marketing in India
Authors: Ghosh Sourabh
Published: May 2022

The electronic National Agriculture Market (eNAM) is a pan-India online trading platform that links Agricultural Produce Market Committee markets to create a unified national market for agricultural produce. However, with the adoption of eNAM by the relevant stakeholders being relatively slow, Government of India has initiated a number of steps to address the issues related to post-harvest infrastructure, transportation of farm produce, etc. with particular focus on small and marginal farmers. This paper positions eNAM in the backdrop of marketing reforms and discusses the key enablers that would result in the successful implementation of this flagship scheme.
Engagement of Constructivism with the Human Security Theory
Authors: Pathak Tripuresh
Published: May 2022

Human Security has developed as an alternative approach to Traditional concept of Security. The traditional concept is dedicated to protecting the state from external invasion and it is focused on preserving the sovereignty and security of the state. The Human Security concept critically enriches the concept of Security by adding the economic, social, environmental, health and identity related issues. Human Security securitizes these issues, i.e., it raises the value of these issues to such an extent that they ought to be treated as Security concerns. It contends that great challenges are present to security in form of crisis in these important dimensions. Constructivism is an approach that contends that Reality is neither purely subjective nor purely objective, but is inter-subjective. Reality is constructed by the interaction of different players, actors and institutions. Constructivism helps us in understanding the concept of Human Security as the latter also constructs the concept of Security in a creative fashion. Human Security is not static as new dimensions of the ever-changing world can be included within its parameters as per the requirements. The paper is an effort to understand the relevance of Constructivism in understanding the dimensions, scope and limitations of Human Security. The approach of Human Security can also benefit the development of Constructivism as the structure of global politics may witness important change if the concept of Human Security finds a place in the perspective of major players and institutions in World Politics.
Technical Efficiency of Turmeric (Curcuma Longa L.) Production in Kaduna State, Nigeria
Authors: Ayilla V.N.
Published: May 2022

Purpose: The study analyzed the technical efficiency of turmeric production in Kaduna State, Nigeria.

Methodology:  Data for the study were collected with the aid of structured questionnaire from 33 turmeric farmers from Jabba, Kachia, Jama’a, and KagarkoLocal Government Areas of Kaduna State. The collected data were analyzed using descriptive statistics and stochastic frontier production function.

Findings: Analysis of the results revealed that the mean technical efficiency of turmeric farmers in the study area was 28% with majority (66.7%) having technical efficiency level of ≤0.303. Also, analysis of the stochastic frontier production function revealed that the socio-economic characteristics of turmeric farmers in the State significantly influenced their technical efficiency.

Unique contribution to theory, practice, and policy: It was recommended that campaigns aimed encouraging more youths into turmeric production as well as discouraging large household size among turmeric farmers should be promoted in the study area; and policies aimed at increasing the resource use efficiency of turmeric farmers in the State and hence their farm output should include the farmers’ specific efficiency factors in their formulation.
Self-Care Behavior and its Relationship with Selected-Demographic and Clinical Variables of Patients with Heart Failure
Authors: Seetharaman Balasaraswathi , Sumathy J. , Anand Jasmin
Published: May 2022

Heart Failure is one of the major public health problems and the leading cause of hospitalisation in people older than 65 years of age. The purpose of this descriptive study was to assess the self-care behaviour of patients with Heart Failure (HF) and its relationship with their selected socio-demographic and clinical variables in CMC, Vellore. The sample size was 140. The subjects were chosen by simple random sampling technique. Modified revised self-care behaviour scale was used to assess the self-care behaviour. The results showed that selfcare behaviour was found to be satisfactory in 45.7 percent and moderately satisfactory in 44.3 percent of patients with heart failure.
ИСПОЛЬЗОВАНИЕ ВЕЩЕСТВ С ФАЗОВЫМ ПЕРЕХОДОМ ДЛЯ АККУМУЛИРОВАНИЯ ТЕПЛОВОЙ ЭНЕРГИИ
Authors: А. В. Коломийцева
Published: May 2022

Аккумулирование тепловой энергии - это технология, позволяющая накапливать тепловую энергию путем нагревания или охлаждения носителя, для того, чтобы накопленную энергию можно было использовать позднее для обогрева и охлаждения различных объектов. Эффективным методом хранения тепловой энергии является использование материалов с фазовым переходом. Вещества с фазовым переходом являются изотермическими по своей природе и, таким образом, обеспечивают накопление энергии более высокой плотности, и обладают способностью работать в различных температурных диапазонах. Аккумулирование тепловой энергии с использованием материалов с фазовым переходом широко используется в системах, работающих с солнечными коллекторами, фотогальваническими панелями, тепловыми насосами, системами кондиционирования, системами рекуперации тепла. В данной статье описаны теоретические преимущества процесса использования аккумуляторов тепловой энергии. Рассмотрены вещества с фазовым переходом, которые являются основным компонентом системы, позволяющим эффективно использовать энергетические ресурсы. В статье содержится информация о основных типах веществ с фазовым переходом, их преимуществах и недостатках, а также сферах применения. Кроме того, в статье проводится сравнительный анализ веществ на основе их теплофизических характеристик. Также, приведены основные характеристики, которые необходимо учитывать при выборе вещества для создания теплового аккумулятора.
КОРРЕКЦИЯ КОЭФФИЦИЕНТА МОЩНОСТИ В СИСТЕМАХ ЭЛЕКТРОСНАБЖЕНИЯ С МЕЛКИМИ НЕЛИНЕЙНЫМИ ПОТРЕБИТЕЛЯМИ
Authors: В. Ф. Говорун  , В. П. Марковский  , Б. К. Шапкенов  , П. В. Бурцев  , А. С. Аябаев
Published: May 2022

В работе, на основании имитационного моделирования, предлагается алгоритм исследования резонанса тока, возникающего в системе электроснабжения при хаотичном изменении мощности нагрузки и вариации степени компенсации реактивной мощности, при наличии потребителей, имеющих нелинейную вольтамперную характеристику. Показано, что перегрузка конденсаторных батарей может возникать в широком диапазоне частот, близких к резонансной частоте. Предлагаемый алгоритм определяет все возможные частоты, на которых может произойти увеличение токов в конденсаторных батареях выше допустимых величин при параллельном резонансе. В процессе работы предприятия нагрузка по технологическим причинам (включение/отключение) или аварийным отключениям может изменяться в очень широком диапазоне при условии неизменности количества подключенных конденсаторов из-за инерционности регулятора БСК. Поэтому при исследовании резонанса тока необходимо проводить расчеты всех возможных режимов работы сети. Определение диапазона частот, на которых будет происходить перегрузка конденсаторов, необходим для выбора способов и средств подавления высших гармоник, подбора и настройки устройств, предназначенных для снижения амплитуд токов высших гармоник в сети. Цель предлагаемой работы: показать, в каких режимах работы системы электроснабжения предприятия может возникать перегрузка конденсаторов токами высших гармоник при изменении мощности нагрузки и вариации степени компенсации реактивной мощности.
Мобильная гидроэнергетическая установка
Authors: А. В. Дробинский  , Д. С. Уразалимова  , Л. Н. Кириченко
Published: May 2022

Одним из путей снижения загрязнения окружающей среды является использование нетрадиционных возобновляемых источников энергии. Из всех ныне существующих альтернативных источников энергии наиболее выгодным является – энергия воды. Интенсивное освоение гидроэнергетического потенциала рек Казахстана, дало толчок к ускоренному развитию гидроэнергетического строительства. Однако, строительство крупных гидроэлектростанций (ГЭС) привело к огромному ущербу для сельского хозяйства и природы. В связи с этим и проблемами, имеющимися в топливно-энергетических комплексах, большое значение придается развитию малой энергетики, использующей нетрадиционные источники энергии, а именно, энергию малых рек. При современных подходах к использованию энергии малых рек и водотоков имеются широкие возможности для строительства мини- и малых ГЭС. В статье дано описание работы и показана конструкция всесезонной мини ГЭС, мобильность которой обеспечивается ее плавучестью, что позволяют транспортировать ее по воде к месту установки для эксплуатации. Конструкция обеспечивает эффективное использование энергии потока воды. Установка может быть использована как экологически чистый альтернативный источник энергии для электроснабжения бытовых потребителей на территориях, вблизи рек.
ОПРЕДЕЛЕНИЕ ЭКРАНИРАНИРУЮЩИХ СВОЙСТВ ОБОЛОЧКИ ПОФАЗНО-ЭКРАНИРОВАННОГО ТОКОПРОВОДА
Authors: Б. Е. Машрапов  , Ж. Б. Мусаев  , О. М. Талипов
Published: May 2022

Показано, что оболочка пофазно-экранированного токопровода практически не препятствует распространению магнитного поля, созданного током в его шине, и является экраном для внешних магнитных полей. Представлены коэффициенты экранирования оболочек токопроводов производства России с различными геометрическими параметрами, полученные в результате натурных экспериментов и компьютерного моделирования в программе Ansys Maxwell. Определено, что коэффициент экранирования оболочки токопровода зависит от величины отношения ее длины к диаметру, причем он возрастает с увеличением этого отношения и при его значении четыре к одному и более остается неизменным. Исследована возможность использования известной простейшей формулы для расчета коэффициента экранирования внешнего магнитного поля трубчатым экраном бесконечной длины для оболочек токопроводов. Приведены коэффициенты экранирования используемых в экспериментах оболочек, рассчитанные по этой формуле, и выполнено их сравнение с полученными экспериментально. Показано, что ею можно пользоваться введя в знаменатель поправочный коэффициент kп=1,3, если длина оболочки превышает ее диаметр более, чем в четыре раза. Представлены лабораторные установки для исследования экранирующих свойств оболочек токопроводов и методики проведения экспериментов.
Ascolani, A. y Gutiérrez, T. (coords.) (2020). Agro y política en Argentina. Tomo III: desarrollismo, reforma agraria y contrarrevolución, 1955-1976.
Authors: D’Ascanio Gabriela
Published: May 2022

La obra reseñada forma parte de una colección que indaga y reconstruye la relación entre el Estado, la política y los actores sociales en el agro pampeano a lo largo del siglo XX. La organización cronológica de la colección y la preeminencia de criterios políticos en las delimitaciones temporales asignaron al primer tomo el estudio del período comprendido entre 1930 y 1943. Los años que siguieron hasta 1955 fueron abordados por el tomo siguiente. El recorte temporal del tercer tomo comprende el lapso 1955-1976, período en el cual se alternaron regímenes dictatoriales y de democracia restringida, finalizando con un inestable gobierno constitucional. En el mismo tuvieron lugar crisis cíclicas de la balanza de pagos, oscilaciones en el producto bruto interno, alternancia de políticas de mercado aperturistas con internistas y la preeminencia, hibridación y estancamiento de las nociones desarrollistas. La complejidad del período es abordada de modo introductorio en la Presentación del tomo, ofreciendo una mirada valiosa y original, necesaria para situar los cambios políticos y económicos sobre los que versan los capítulos que siguen. En esta obra colectiva se ponen en relación dichos fenómenos económicos y políticos generales con las permanencias y continuidades ocurridas en las políticas agrarias, intervencionistas y asistenciales propias del período previo en el agro pampeano.
¿De qué manera provee bienestar una escuela agraria? La gobernanza en la provisión de bienestar. El caso de la EFA Salazar
Authors: Sampayo María Lucia
Published: May 2022

En términos de bienestar y su producción, un interrogante que suele emerger apunta a la atribución de responsabilidades por parte de las distintas esferas de la estructura social. En este sentido, el presente artículo busca dar a conocer lo investigado acerca de la gobernanza en la provisión de bienestar, tomando como caso a la Escuela de la Familia Agrícola (EFA) 4155 Colonia “El Pincen”, ubicada en la localidad de Salazar, Provincia de Buenos Aires, Argentina. Esta intencionalidad recorre tanto las preguntas de investigación, como las principales perspectivas teóricas y estrategia metodológica concomitante, conduciendo a los principales hallazgos y conclusiones arribadas. Todas los cuales refieren a una gobernanza de proximidad y multinivel, para atender a los compromisos asumidos, traducidos en responsabilidades adjudicadas por la EFA ante desigualdades sociales observadas en territorio.
Microstructural and Electrochemical Analyses of Al-Zn-In Sacrificial Anode Produced Using Semisolid Slope Casting Process Under Various Casting Conditions
Authors: Soltanpour Mojtaba , Boroujeny Behrooz Shayegh , Nourbakhsh Amir Abbas
Published: May 2022

The effect of superheat temperature, slope angle, and the length of the cooling surface on the microstructure and electrochemical behavior of the Al-Zn-In sacrificial anode were investigated. The optimal microstructure, as measured by the highest sphericity (0.72) and the smallest grain size (32 μm), was obtained by the melt at a temperature of 680°C, the slope angle of 45°, and the cooling surface length of 500 mm. Increasing the superheat temperature and the length of the cooling surface had the greatest influence on the sacrificial anode’s microstructural characteristics and electrochemical performance. The corrosion rate for the optimal and primary as-cast Al-Zn-In (blank) samples was 0.14 mm/y and 0.034 mm/y, respectively, indicating that implementing a semisolid process had a positive effect on the corrosion rate of the sacrificial anode. Furthermore, the reduction in corrosion resistance for the optimal sample compared to the blank sample, as well as the continuous corrosion process occurring without significant changes in corrosion resistance over time as measured by the electrochemical impedance spectroscopy (EIS) test, indicates that corrosion data and EIS results were in agreement. In addition, the electrical current that the optimal anode sample can provide has increased from 0.006 A to 0.012 A when compared to the blank sample, according to the results of the chronoamperometry test.
DIVERSIDADE DE HETEROPTERAS (INSECTA: HEMIPTERA) AQUÁTICOS E SEMIAQUÁTICOS NA CHAPADA DIAMANTINA, BA.
Authors: Pinheiro Ramos Aiala Alana , De Barros Cabral Jeniffer , Mariano Rodolfo
Published: May 2022

A conservação tem como um dos seus principais objetivos a manutenção da biodiversidade. As métricas para medir a biodiversidade em uma determinada área, dependem da interação de vários fatores, como por exemplo a relação de dados bióticos com dados abióticos do ambiente nos organismos. A proposta deste trabalho é fazer um levantamento faunístico focado na ordem Hemiptera. As coletas foram realizadas no Parque Nacional da Chapada Diamantina (PNCD) que está situado no centro do Estado da Bahia, sendo o PNCD uma área de proteção integral. Foram amostrados 20 pontos, em dois municípios, Palmeiras e Lençóis. As amostras foram obtidas com auxílio de uma rede entomológica do tipo D e fixadas em álcool 70%, posteriormente levadas para o Laboratório de Organismos Aquáticos na Universidade Estadual de Santa Cruz – Ilhéus/Ba, onde foram triadas e identificadas. Foram identificados 627 indivíduos pertencentes a 16 gêneros distribuídos em 11 famílias. O estado da Bahia, possui registro de 124 gêneros de Heteroptera. Dentre os gêneros coletados, Ambrysus., Cataractocoris, Ctenipocoris, Enitharoides, Lipogomphus, Martarega, Mesoveloidea, Microvelia, Monogobia, Neotrephes, Notonecta, Ranatra, Rhagovelia e gên 1. (Saldidae) são novos registros o estado. Trabalhos de cunho taxonômico como levantamentos faunísticos, contribuem para o conhecimento da diversidade da fauna do PNCD e consequentemente do estado da Bahia. Entender a distribuição das espécies de insetos aquáticos permite um aprimoramento nos índices de qualidade de água, uma vez que a biologia das espécies ainda é um mistério no estudo dos insetos aquáticos.
User Experience Evaluation for Automation Tools: An Industrial Experience
Authors: de Menezes Thiago Medeiros
Published: May 2022

Evaluating the User Experience in some contexts is challenging, especially in automation applications, due to specific situations and requirements. This paper presents an experience of applying the UX evaluation method for an automation tool in the Android software industry to assist software engineers in identifying the UX problems faced by users. The work applies heuristic evaluation, survey, and user interview methods to find the UX problems, understand the respective reasons, validate the given information, and finally assess the UX. The evaluation identified critical problems related to error messages, system response to errors, and proper feedback about what software is doing. The found problems and discussions contributed to developing new UX evaluation methodologies.
A Deep Learning-based Accurate Drug Detection, Identification and Confirmation Mechanism for Medication Dispensing Package of Inpatients
Authors: Lin Hui-Chuan , Li Guen-Han , Su Po-Cheng , Hsu Roy Chaoming
Published: May 2022

In this study, a deep learning based accurate drug detection, identification and confirmation mechanism (DLADDICM) for medication dispensing package is proposed for inpatients. In this proposed DLADDICM, a medication dispensing package with a printed QR code is photo taken and drugs in the image are detected and identified using a deep learning object detection algorithm, namely You Only Look Once (YOLO). The QR code information is deciphered and compared with the detected drugs to confirm the correctness of the medication dispensing. If there are mismatch situation(s), the computer with the proposed DLADDICM will generate different warning sound in responding to different incorrect situations. A data set with 30 drugs form the National Library of Medicine of NIH, USA is used for testing the DLADDICM using the object tracking and detection deep learning algorithm YOLOv3. Experimental results shown that the DLADDICM can detect and identify the incorrect drugs and generate the appropriate warning sound for the incorrect drug in pharma package for further human inspection. The experimental results also exhibits that by using the AI-enabled mechanism an accurate, safer, healthier with precision medication environment for the medical industries could also be achieved.
Performance Comparison between Pytorch and Mindspore
Authors: XIA Xiangyu , ZHOU Shaoxiang
Published: May 2022

Deep learning has been well used in many fields. However, there is a large amount of data when training neural networks, which makes many deep learning frameworks appear to serve deep learning practitioners, providing services that are more convenient to use and perform better. MindSpore and PyTorch are both deep learning frameworks. MindSpore is owned by HUAWEI, while PyTorch is owned by Facebook. Some people think that HUAWEI's MindSpore has better performance than FaceBook's PyTorch, which makes deep learning practitioners confused about the choice between the two. In this paper, we perform analytical and experimental analysis to reveal the comparison of training speed of MIndSpore and PyTorch on a single GPU. To ensure that our survey is as comprehensive as possible, we carefully selected neural networks in 2 main domains, which cover computer vision and natural language processing (NLP). The contribution of this work is twofold. First, we conduct detailed benchmarking experiments on MindSpore and PyTorch to analyze the reasons for their performance differences. This work provides guidance for end users to choose between these two frameworks.
An Evaluation of the use of Audio Guidance in Augmented Reality Systems Implemented at Sites of Cultural Heritage
Authors: Wilson Benjamin , Hull Joshua , Schofield Damian
Published: May 2022

Recently, museums and historic sites have begun reaching out beyond their traditional audience groups, using more innovative digital display technology to find and attract a new audience. Virtual, mixed, and Augmented Reality (AR) technologies are becoming more ubiquitous in our society and “virtual history” exhibits are starting to be available to the public. There are numerous studies focusing on AR, however a scant amount of research is being done at historical sites. An initial experiment used repeated measures (ANOVA) to compare and rank three different types of AR devices used at a site of cultural heritage. A further experiment was then undertaken to observe participants using two different AR devices with and without sound to determine if which device used or the presence of sound impact the usability of the device, or the user’s satisfaction/preference of specific devices. Several surveys, including demographic and usability surveys, were provided in order to collect a range of user data. A two-way repeated measures (ANOVA) were used to analyze the quantitative data gathered. No significant effects were observed based on the quantitative data provided by the surveys, indicating that all devices were equally usable and satisfactory, and that sound did not have a significant impact in this instance. However, the qualitative data indicated that users may prefer using AR technology on a smartphone device and preferred to use this device paired with sound.
The Development of a Blended Learning Management Model with Synectics Teaching and out-of-the-box Thinking Techniques to Foster Creativity
Authors: Roekmongkol Senawee , Rattanaphant Thanatcha
Published: May 2022

The objectives of this research are: 1 ) to develop and determine the quality of a blended learning management model using synectics teaching and out-of-the-box thinking techniques; 2 ) to compare creativity thinking score after receiving the blended learning management by teaching synectics and outof-the-box thinking techniques to foster creativity and 3) to study the satisfaction of students learning with the blended learning management model. The sample group used in this research was the 1 st year Bachelor of Education students, Faculty of Education, Rajabhat Nakhon Si Thammarat University including 60 students enrolled in the course of innovation and information technology for communication and learning in semester 2, academic year 2020. They were divided into experimental groups and control groups. The research tools included web-based lessons, lesson plans and satisfaction assessments including mean, S.D. and hypothesis testing with independent t-test. The results showed that:1) the results of the development and quality assessment of the blended learning model by using synectic teaching and out-of-the-box thinking techniques to promote creativity were at a very good level; 2) comparison of creativity scores of the experimental group students after receiving the learning management with the developed instructional model were higher than the control group, indicating that the mean scores have statistically significantly different at . 05 and 3) the overall student satisfaction assessment in all aspects was high level. It was concluded that the research results were in accordance with the hypothesis testing.
salvadoreños evalúan los dos años de gobierno de Calderón
Authors: IUDOP
Published: May 2022

Entre los días 25 y 30 de mayo de 1996, se realizó un sondeo de opinión pública con una muestra de 1,212 adultos, representativa de la población salvadoreña y con un margen de error de más- menos 4 por ciento. La pesquisa, diseñada para recoger y dar seguimiento a la opinión de los ciudadanos sobre el desempeño del gobierno de Armando Calderón después de dos años de estar en el poder, revela que la mayoría de los encuestados continúa evaluando negativamente al poder ejecutivo, le asignan una nota evaluativa de 5.12 y, de nuevo, critica fuertemente las políticas económicas del gobierno.
ECA Estudios Centroamericanos, Vol. 51, No. 571-572, 1996: 459-474.
De crisis y soluciones
Authors: Montoya Aquiles
Published: May 2022

No hay resúmenes disponibles.

ECA Estudios Centroamericanos, Vol. 51, No. 571-572, 1996: 481-483.