bluuebunny/crossref_metadata_2025 huggingface dataset:
Claves de los conflictos socioambientales mexicanos
Authors:   Universidad Autónoma de Zacatecas, Tetreault Darcy
Published: July 2021

Políticos e investigadores asumen que el crecimiento económico es imprescindible para reducir la pobreza, puesto que redunda en la creación de empleos y de financiamiento de las políticas sociales. Si bien en la posguerra el crecimiento contribuyó a reducir la pobreza, las políticas sociales ya no pueden subordinarse al imperativo del crecimiento económico debido a los límites ecológicos y los conflictos socioambientales. De ahí la relevancia de pensar en alternativas poscapitalistas. En las últimas décadas se advierte que la dinámica de acumulación de capital ha generado rupturas metabólicas en el nivel planetario y múltiples problemas ambientales en los ámbitos nacional y local. Las propuestas de decrecimiento postulan el posdesarrollo a escalas local y subnacional y el posestructuralismo enfocado en el discurso, los valores y la cultura. La perspectiva marxista sobre el decrecimiento alude a los cambios estructurales necesarios y la cuestión de agencia. Los conflictos socioambientales en México se han multiplicado desde la aplicación en 1992 de reformas estructurales diseñadas para liberar la tierra, el agua y los demás recursos naturales a las fuerzas del mercado. Las demandas, propuestas y alternativas de las luchas socioambientales mexicanas constituyen puntos de referencia insoslayables para pensar en las formas de organización y las políticas públicas requeridas con el fin de empezar una transición hacia modos de producción y gobernanza que exhiben racionalidad socioecológica y diversidad biocultural, y que están orientados a la satisfacción de las necesidades básicas de todo el mundo.
Capitalismo, desarrollo, imperialismo, globalización: una historia de cuatro conceptos
Authors:   Universidad Autónoma de Zacatecas, Veltmeyer Henry
Published: July 2021

This article addresses a series of controversies which have come to surround the concepts of «development», «globalization», and «imperialism», with regard to whether they may serve as descriptors of capitalist development and in what way. The article offers a general vision of criticism of the dominant discourse on those concepts from a critical development studies’ perspective.
Coarse-crystalline pyrite of the Central Timan
Authors: Shaybekov R.I. , Sokerin M.Yu. , Kotelnikov V.G. , Lysyuk A.Yu. , Ignatyev G.V. , Tropnikov E.M.
Published: July 2021

The results of mineralogical, geochemical, X-ray, isotopic and spectroscopic studies of coarse-crystalline pyrite (Kyvvozh Formation, Dimtem’el Creek, Central Timan) are presented. Pyrite is characterized by cubic habit and zonal Co distribution. It contains galena, thorite, zircon, monazite, rutile, chlorite, muscovite, quartz, albite, apatite and calcite inclusions. The unit cell parameter of pyrite vary from 5.4137 ± 0.0002 to 5.4187 ± 0.0010 A and correspond to an ideal pyrite. The sulfur isotopic composition of coarse-crystalline pyrite of 15.8‰ indicates its formation as a result of sulfate reduction during epigenesis.
Analisis Pengaruh PDB Iran, Kurs Dolar AS dan Inflasi Indonesia terhadap Nilai Ekspor Indonesia ke Iran Periode 2006.1-2017.4
Authors: Husain Diautoriq , Sulistyono Bambang , Udjianto Didit Welly , Hidayat Purkon
Published: July 2021

Selama tahun 2003-2017, pemerintah Indonesia terus berupaya untuk meningkatkan nilai ekspor, salah satunya dengan membuka pasar alternatif seluas-luasnya. Hal itu untuk meminimalisir resiko di tengah ketidakpastian global. Iran menjadi salah satu opsi pasar alternatif yang dapat dipilih Indonesia untuk meningkatkan ekspornya, jika berkaca pada jalannya ekspor Indonesia ke Iran selama tahun 2003-2017. Penelitian ini menggunakan analisis kuantitatif. Dalam melihat pengaruh Produk Domestik Bruto (PDB) Iran, kurs dolar Amerika Serikat (AS), dan inflasi Indonesia terhadap nilai ekspor Indonesia ke Iran secara triwulanan selama kurun waktu 2006.1-2017.4, penelitian ini menggunakan alat analisis regresi linier berganda Ordinary Least Square (OLS) karena data dalam bentuk time series. Hasil penelitian ini menunjukkan bahwa PDB Iran, kurs dolar AS, dan inflasi Indonesia secara simultan berpengaruh signifikan terhadap nilai ekspor Indonesia ke Iran. PDB Iran secara parsial berpengaruh positif dan signifikan, sementara kurs dolar AS berpengaruh negatif dan signifikan, sedangkan inflasi Indonesia tidak berpengaruh.
Posverdad y noticias falsas: esquemas perversos de interferencia democrática
Authors: Bermúdez Vázquez Manuel
Published: July 2021

La dinámica de nuestro tiempo nos ha llevado a una situación especialmente delicada para nuestros sistemas políticos. En el análisis que aquí presentamos damos cuenta de cuatro mecanismos que, aunados, pueden suponer una seria amenaza para el funcionamiento de la democracia. Estos mecanismos son: la demagogia, las noticias falsas, la posverdad y la carencia de pensamiento crítico. Con una presentación breve pero contundente de los efectos devastadores que estos elementos están ya provocando lo que nos proponemos es poner sobre aviso a la sociedad para tratar de aplicar las medidas correctoras necesarias.
La posverdad en la era del panóptico digital
Authors: Hernández Domínguez Carlos
Published: July 2021

Vivimos en un mundo donde el carácter ficcional se ha introducido en nuestras vidas. Fantasía y realidad ahora convergen en el mismo marco: las fake news. La posverdad en este tipo de noticias hace eco a través de las redes sociales utilizadas como medios psicopolíticos. El neoliberalismo usa estos instrumentos gracias a los big data con el fin de fragmentar la información y, asimismo, la verdad. Nuestra condición posmoderna ha sido uno de los factores, así como el desarrollo de las ciencias de la computación, que ha dado pie a esta situación donde la verdad es lo menos que interesa. Nos movemos en busca de afectos, reacciones, likes; en la era de la información lo que importa es la emoción, la racionalidad ha sido desechada.
Review of the lappet moths’ collection (Lepidoptera: Lasiocampidae) of the Museum of Nature of the Vasyl Karazin Kharkiv National University
Authors: Guglya Yu. O.
Published: July 2021

Complete annotated list of lappet moths (Lepidoptera: Lasiocampidae) of the collection of the Museum of Nature of the Vasyl Karazin Kharkiv National University is given in the article. The material was collected mostly on the territory of Ukraine, Russia, Belarus, Georgia, Armenia, Azerbaijan, Kazakhstan, Turkmenistan, Uzbekistan, Kyrgyzstan, and Tajikistan. In addition, single specimens from Austria, Germany, Slovenia, Hungary, Israel, and Tanzania are there. The collection consists of 659 specimens of 50 species of lappet moths. The half of lappet moths are the part of the butterflies’ assemblage of well-known collector A. S. Lisetskyi, that fully deposited in the Museum of Nature of the Vasyl Karazin Kharkiv National University.
TAXONOMIC STUDY FOR THE NEW RECORD OGASTEMMA PUSILLUM (BORAGINACEAE) IN IRAQ
Authors: & Shahatha Mousa
Published: July 2021

During the filed survey of   140-160 kilometers region and on both sides of the highway west of Ramadi city in the western desert district of Iraq, and in late spring of 2019, confirmed the recorded of the Ogastemma genus for the first time in Iraq, which was characterized by being a monotypic genus belonging to Boraginaceae family and represented by Ogastemma pusillum. After the identification of the species, which was based on the Flora of the neighboring countries, the species was studied taxonomically. The study worked on describing and photographing all the vegetative and floral parts, anatomy of stem, stomatal complex in leaves, and pollen grains. The plant specimens were preserved under the numbers 60264, 60265 in the Iraqi national herbarium. A morphological study showed that there was uniform indumentum of the epidermis of vegetative organs was appressed-hispid, represented by non-glandular trichomes, medium length of 800-1500 micrometer.
MARGIN OF SAFETY OF HIRING DECISION OF AGRICULTURAL MACHINERY SERVICES BY RICE FARMERS IN ALNAJAF AL-ASHRAF PROVINCE
Authors: Kadhim Z. R.
Published: July 2021

The main objective of this study is to compute margin of safety of hiring decision of agricultural machinery services in Iraq. A cost-volume-profit analysis by using breakeven point technique has been followed to find out the margin of safety by using cross- section data in rice production farms in Alnajaf province. Results showed that the break-even point for different types of original agricultural field machinery were 427, 6.5, and 221 hours for tractor and machinery of soil preparation, farm sprayer, and combine harvester, respectively, while the values of break-even point for different types of used agricultural field machinery were 309, 10, and 319 hours for tractor, farm sprayer, and combine harvester, in that order. Results also pointed out that the negative sign of safety margin of areas of all machineries indicated that there are losses faced by small scale farmers in case of ownership these machineries, and the minimum lose amounted about $ 316116 for original tractor, $ 52611 for used tractor, $ 220.5 for original farm sprayer, $ 88 for used farm sprayer, $ 664664 for original combine harvester and $ 584650 for used combine harvester. The study recommended that it is useful for small scale farmers in Alnajaf province to continue hiring various agricultural machinery services rather than purchase them due to the absence of safety margin of holding areas. Therefore machine stations of agricultural machineries services maybe developed by Iraqi government in the study region to provide these services to the farmers with supported prices.
UNILATERAL DIAPHRAGMATIC PALSY MIMICKING A PULMONARY SPAC OCCUPYING LESION IN A CASE OF NEUROMYELITIS OPTICA
Authors: Biswas Pratik , Seth Vaibhav , Patwari Annapurna
Published: July 2021

The article presents a 15year old young female known case of Neuromyelitis Optica Spectrum Disorders who was admitted with complaints of
quadriparesis and respiratory failure. Although she improved with steroids but her dyspnea persisted. And on evaluation she was found to have
unilateral diaphragmatic paralysis which was conrmed on uoroscopy.
GENERALIZATIONS OF FOURIER SERIES: MATHEMATICAL MODELLING OF SPECTRAL REPRESENTATION OF PERIODIC AND NON-PERIODIC SIGNALS ANALYSIS
Authors: Iluno Christiana , Iluno John
Published: July 2021

This paper discussed the use of Fourier series frequently in theoretical studies of periodic and non-periodic signals. A periodic signal can be
represented by a Fourier series which is formed, by adding together an innite number of harmonics at frequencies which are multiples of the
fundamental repetitive frequency of the signal sequence.
With the use of Fourier series, we can resolve the signal X(t)=x(t+nT) ∶n=±1,±2,⋯ into an innite sum of sine and cosine terms to obtain
spectral representation of a signal. The Fourier Transform is a tool that breaks a waveform (a function or signal) into an alternate representation,
characterized by sine and cosines. The Fourier Transform shows that any waveform can be re-written as the sum of sinusoidal functions. The
Fourier series is used to represent a periodic function by a discrete sum of complex exponentials, while the Fourier transform is then used to
represent a general, non-periodic function by a continuous superposition or integral of complex exponentials.
This paper shows the spectral representation of non-periodic signals notably, pulsed signals being accomplished by expanding into Fourier
integrals.
EFFECTS OF THE COMBINATION OF KTTKS AND GEKG PEPTIDES ON AN EXPERIMENTAL RAT MODEL OF OSTEOARTHRITIS
Authors: Chen Hung-Wen , Shin Jing-Yu , Liang Yao-Jen
Published: July 2021

OBJECTIVE: The aim of this study was to analyze the therapeutic potential of the combination of two articial synthetic peptides of KTTKS and
GEKG in osteoarthritis (OA).
METHODS: The combination of KTTKS and GEKG (ICPPX) were injected into the intra-articular space in different dose (10 ppm, 50 ppm and
250 ppm). Grossly inspection of swollen status, running wheel test, pro-inammatory markers of IL-1β and TNF-α were measured. Finally,
histopathological examination of the knee joints was performed.
RESULTS: The swelling status were higher in the control group than treatment groups. However, the running wheel test showed no signicant
changes. Both pro-inammatory markers of IL-1β and TNF-α were signicantly lower in treatment groups. In the histopathological examination,
the cartilage damage is most severe in the control group. Similar results were seen in the immunohistochemical stain of collagen type II staining.
CONCLUSIONS: The combination of KTTKS and GEKG peptides (ICPPX) injection ameliorates the joint inammation and prevents further
deterioration of the cartilage structure as manifested by the OARSI scoring system and collagen stain of the joint.
GOBE ARTICHOKE AS SUPPLEMENTARY FLOOD TO RESTRAIN DEPRESSION? A CASE STUDY
Authors: Lin Jyh-Woei
Published: July 2021

A depression patient in a hospital in Taiwan was tested from 02, Jan, 2019 to 02, May 2019. On 02, March, he began to take an artichoke capsule
with 600mg every day. His ood and water with same and constant contents and the antidepressant i.e. Mirtazapine (15mg) were controlled with
the same conditions befor and after taking artichoke capsule. Heart rate variability (HRV) was used to detect his Resting Heart Rate (RHR) every
day in the test time. HRV was used to detect his RHR with the averaged RHR of 113/min from 02 Jan, 2019 to 02 March 2019. His RHR was
simultaneously detected every day by HRV with the RHR of 79/min from 03, March 2019 to 02, May 2019 after taking artichoke capsule. Another
patient has shown the RHR with 104/min under the same treatment without taking artichoke for comparison. Results shown the depression of this
patient obtained a little good improvement. Therefore, artichoke can be suggested as importation and supplement and then was combined into
antidepressants to treat and restrain depression
ATTITUDE TOWARDS MORAL VALUES AMONG B.ED., TRAINEES
Authors: Neeruti Venkatrao , Soundararajan M.
Published: July 2021

An attempt was made in the present investigation Aim: Attitude towards moral values among B.Ed., Trainees. Objective: To assess the impact of
gender, management and methodology on moral values among B.Ed., trainees. Sample: Sample of the present study consists of 1200 B.Ed.,
trainees in Warangal district of Telangana State. Tool: Moral values inventory developed by Venkat Rao and Soundararajan (2019) was
administered. Conclusion: Results revealed signicant impact of gender, management and methodology on moral values.
Um estudo sobre evasão no curso de engenharia civil
Authors: Farias George , Maria de Lourdes da Silva Neta
Published: July 2021

A evasão dos discentes na educação básica e superior impacta na sustentabilidade das instituições formativas e na qualidade educacional. Os cursos de Engenharia apresentam índices de formandos menores que 50% e, quando analisamos as turmas de Engenharia Civil, esse quantitativo é ainda menor, indicando que existe um elevado índice de desistência do curso. Desse modo o objetivo do trabalho foi estudar o índice de evasão do curso de Engenharia Civil do Instituto Federal de Educação, Ciência e Tecnologia do Ceará – IFCE, campus Fortaleza, com o intuito de analisar e fornecer dados para auxiliar na gestão do curso e no planejamento das ofertas considerando o índice de evasão. A metodologia de abordagem qualitativa e quantitativa utilizou-se dos dados fornecidos pela coordenação de controle acadêmico – CCA, por meio do sistema Q-acadêmico. O arquivo fornecido estava em formato de planilha eletrônica, contendo o número de matrícula de cada alunos, a situação da matrícula e situação de matrícula no período, e não continha a identificação do estudante. O período dos dados coletados foi entre as turmas de 2012.2 até 2018.2. Com as informações fornecidas, calculou-se o índice de evasão para cada turma e efetuou-se análise estatística. Como resultado, obteve-se o número de estudantes evadidos em relação à quantidade de estudantes ingressantes em cada turma. Dessa forma, a instituição investigada pode utilizar a equação, AE = -3,889 + 0,449 TM, para gerir os cursos, planejar a oferta de outras turmas do curso de Engenharia Civil.
Kontribusi STEAM Project Based Learning dalam Mengukur Keterampilan Proses Sains dan Berpikir Kreatif Siswa
Authors: Suryaningsih Siti , Ainun Nisa Fakhira
Published: July 2021

Pembelajaran diketahui sebagai aspek pendidikan yang mempunyai peran utama sebagai penentu kualitas pendidikan. Proses pembelajaran dituntut untuk selalu dapat menyesuaikan dengan perkembangan zaman. Namun, pembelajaran sains masih didominasi oleh paradigma masyarakat yang memandang ilmu sains sebagai ilmu hafalan dan guru sebagai sumber utama pengetahuan. Inovasi pembelajaran untuk membangun keterampilan proses sains dan berpikir kreatif siswa salah satunya ialah mengintegrasikan pendekatan STEAM (Science, Technology, Engineering, Art, Mathematics) dengan Project Based Learning pada proses pembelajaran kimia. Penelitian ini bertujuan untuk mengetahui keterampilan proses sains dan keterampilan berpikir kreatif siswa pada pembelajaran kimia materi titrasi asam-basa dengan integrasi STEAM project. Metode yang digunakan pada penelitian ini adalah deskriptif kuantitatif dengan melakukan pengambilan data pada 76 siswa MAN Sidoarjo yang dipilih secara purposive sampling. Penelitian ini menggunakan integrasi STEAM project dengan memberikan project poster informatif diunggah di media sosial instagram. Data penelitian didapatkan melalui kuesioner berupa google form berisikan 14 item. Penelitian menunjukkan hasil yang positif, dengan keterampilan proses sains mendapatkan skor 4,164 dengan persentase keterampilan proses sains kategori tinggi yaitu 83,3 %. Keterampilan berpikir kreatif siswa mendapatkan hasil yang baik dengan skor 4,134 dengan kategori tinggi, yaitu 82,7 %. Integrasi pembelajaran STEAM project selama proses pembelajaran melalui aplikasi WhatsApp group memanfaatkan media sosial instagram mampu menunjang keterampilan proses sains dan keterampilan berpikir kreatif siswa, literasi sains dan digital, serta keterampilan motorik siswa. Hasil ini dapat digunakan sebagai inovasi dalam proses pembelajaran sains.
MEDICAL SIGNIFICANCE OF SOME CULTIVATED SPECIES AND THEIR INVESTMENT ASPECTS IN ANBAR PROVINCE
Authors: Ayid Anaam , Mahmood Sinan , Awadh Sami , Hamad Mohammed , Almehemdi Ali
Published: July 2021

The importance of medicinal plants at the local level has increased in recent times, in both medical and economic terms, and due to the great importance of alternative medicine, it has attracted researchers to study in this area to dispense with chemical treatments and their side effects, this research has dealt with a (Climate, soil, water sources, and vegetation) and human characteristics (population number, age groups and labor force). The second topic dealt with studying the geographical distribution of medicinal plants in Anbar Governorate (desert plants, swamp plants, tree plants, weeds and crops). Furthermore, second chapter studies the appropriate geographical environment for medicinal plants in the governorate and the cultivation seasons for these plants, and the third topic included the medicinal importance of some plants grown in Anbar Governorate in terms of therapeutic and economic terms and the importance of developing this agriculture study of several studies, the first of which is a study of the geography of the governorate in terms of location. And space, boundaries and natural properties. The study focused on update of medicinal plants cultivation and using the condensed agriculture. Moreover, some medicinal plants could tolerate the environmental stresses viz., colocynth and datura. It found that the most cultivated important medicinal and aromatic plants are Baraka seed, dill, fenugreek, fennel, cumin and aniseed.
SYSTEM OF COMPREHENSIVE EXPRESS EVALUATION OF HUMAN FUNCTIONAL READINESS
Authors: Журавлёв Д.В. , Проводников А.А.
Published: July 2021

Благодаря общедоступности и развитию персональных вычислительных устройств стало возможным интегрировать их с системами телемедицины для различных целей. Особенно актуально создание высокоэффективных радиотехнических средств для систем дистанционного контроля и оценки функционального состояния человека. В статье представляется разработанный микродатчик-регистратор на основе микросхемы BMD101, позволяющий передавать информацию по радиоканалу, организованному на микросхеме BK3231 и проводить комплексную экспресс-оценку функциональной готовности человека с использованием методов неинвазивной диагностики. В режиме реального времени обнаружить сердечный ритм позволяет цифровая обработка сигнала, которая способна также произвести фильтрацию помех от промышленной силовой сети и помех, связанных с движением. Приводится список рассчитываемых статистических показателей и спектральных характеристик, выделенных в системы, принятых в качестве Европейского стандарта при исследовании сердечной деятельности. Демонстрируются примеры физиологической интерпретации результатов, полученных с помощью данного программного обеспечения. Выполнен цикл тестирований и последующий анализ полученных результатов показателей функционального состояния у 25 человек различного возраста и спортивной подготовки. В ходе экспериментов установлены основные закономерности результатов. Результаты экспресс-оценки могут быть использованы спортсменами, любителями, персональными тренерами и командами в своей спортивной практике

Due to the general availability and use of various computing devices, it has become possible to integrate them with telemedicine systems for various purposes. It is especially important to create highly efficient radio-technical means for remote control systems and functions of a human's functional state. In the article, we developed a microsensor-recorder based on the BMD101 microcircuit, which makes it possible to transmit information over a radio channel organized on a microcircuit, BK3231 and to conduct a comprehensive express assessment of a human's functional readiness using non-invasive diagnostic methods. Real-time heart rate detection is possible through digital signal processing, which can also filter out industrial power and motion noise. We give a list of the calculated statistical indicators and spectral characteristics allocated to the systems adopted as the European standard for the study of cardiac activity. We show the examples of the physiological interpretation of the results obtained using this software. We carried out a cycle of tests and the subsequent analysis of the results obtained for the indicators of the functional state in 25 people of different ages and sports training. In the course of the experiments, we established the main regularities of the results. The results of the express assessment can be used by athletes, amateurs, personal trainers and teams in their sports practice
A comparative study of students' motivation to practice sports activities in their leisure time
Authors: Olănescu Mihai
Published: July 2021

Physical activity is an important part of a healthy lifestyle, which helps to prevent many chronic diseases. Despite the knowledge about the benefits of playing sports and the problems related to lack of exercise, very few people practice physical activity regularly.
The present study is part of an extensive research of students’ motivation from Technical University of Cluj-Napoca to practice physical sports activities.
The aim of the research was to analyze how students are motivated to practice sports, to remain active and healthy, in a period of their lives when they may be at the beginning of their career, and are tempted to reduce the frequency and the time allocated to these activities.
In order to identify the differences and trends among students, in terms of motivation and behavior to practice physical sports activities in their leisure time, we conducted an investigation based on sociological surveys, comparing the results with those obtained in a similar study, which was done also on the student population of the Technical University of Cluj-Napoca, eight years ago.
The survey results show that only about 30% of respondents comply with World Health Organization recommendations for physical activity, specifically do at least 30 minutes of physical activity at least 3-5 times a week. Both the logistic regression and the association test show that male students practice more sports compared to female students. The most important predictor of the probability that students will practice sports more often in the future is the previous participation in such activities.
Identifikasi Manfaat Ekonomi Untuk Masyarakat Lokal Dalam Penerapan Pariwisata Berkelanjutan di Desa Wisata Kereng Bangkirai
Authors: Kristiana Yustisia , Nathalia Theodosia C.
Published: July 2021

Desa Wisata Kereng Bangkirai berupaya untuk menjadi destinasi wisata yang menerapkan konsep pariwisata berkelanjutan. Pengembangan pariwisata di Desa Wisata Kereng Bangkirai telah memberi manfaat ekonomi, oleh sebab itu diharapkan manfaat ekonomi bagi masyarakat dapat dirasakan secara berkelanjutan. Segmen pasar yang lebih besar akan memberikan keuntungan ekonomi namun bila dikelola dengan kurang baik maka akan memberikan dampak negatif bagi masyarakat lokal. Tujuan dari penelitian ini adalah untuk mengidentifikasi manfaat ekonomi bagi masyarakat lokal berdasarkan kriteria dalam penerapan destinasi pariwisata berkelanjutan di Desa Wisata Kereng Bangkirai. Penelitian ini menggunakan pendekatan kualitatif. Teknik pengumpulan data dalam penelitian ini menggunakan teknik wawancara mendalam dan observasi. Informan adalah pengelola desa wisata, komunitas masyarakat, asosiasi, industri dan Dinas Kebudayaan dan Pariwisata Kota Palangka Raya. Penelitian ini menggunakan analisa deskriptif. Hasil penelitian menunjukkan bahwa sektor pariwisata telah memberi manfaat ekonomi dan secara beriringan menerapkan prinsip pariwisata berkelanjutan.
Pengaruh Program Pelatihan dalam Peningkatan Pelayanan pada Departemen Housekeeping di Hotel Berbintang di Kabupaten Samosir
Authors: Hamdani Muhammad
Published: July 2021

The training program in enhancement plays a very important role in the development of human resources, especially for the current hotel industry which plays a role in the advancement of the tourism industry. The housekeeping department which is responsible for arranging or arranging equipment, maintaining cleanliness and comfort, repairing damage and decorating with the aim that the hotel looks neat, clean, attractive and pleasant for residents to continue to improve by providing the best service by following training and programs provided by management of housekeeping employees. The method used in this research is descriptive research method with a quantitative approach to what extent the training program obtained is absorbed in the implementation of routine tasks by housekeeping employees. The conclusions that can be drawn are because the implementation of the training program for employees has not been good because the implementation of the training program is not continuous or periodic and the results of the service are still not good. the number of percent of respondents' responses that have been managed by 60%
Mechanisms linking hyperglycemia in pregnancy to the offspring cardiovascular system dysfunction
Authors: Xiao Zemeng , Wang Yifang , Thai Phung N. , Li Xuxia , Lu Xiyuan , Pu Jun
Published: July 2021

Hyperglycemia in pregnancy (HIP) is a high-glycemic state that occurs during pregnancy, and gestational diabetes mellitus (GDM) is the major cause of it. Studies reveal that GDM has long-term adverse impacts on mothers and offspring, such as maternal type 2 diabetes, premature birth and stillbirth in newborns, cardiovascular disease, and metabolic disorders in adult offspring. In recent years, studies on the transcription level of GDM and metabonomics have provided new insights into the pathophysiological mechanism of GDM. This article reviews the transcriptional levels and metabolomics studies involving GDM and cardiovascular dysfunction in the offspring, which may provide insight to the long-term health of pregnant women and offspring.
A Generalization of the Bollobás Set Pairs Inequality
Authors: O'Neill Jason , Verstraete Jacques
Published: July 2021

The Bollobás set pairs inequality is a fundamental result in extremal set theory with many applications. In this paper, for $n \geqslant k \geqslant t \geqslant 2$, we consider a collection of $k$ families $\mathcal{A}_i: 1 \leq i \leqslant k$ where $\mathcal{A}_i = \{ A_{i,j} \subset [n] : j \in [n] \}$ so that $A_{1, i_1} \cap \cdots \cap A_{k,i_k} \neq \varnothing$ if and only if there are at least $t$ distinct indices $i_1,i_2,\dots,i_k$. Via a natural connection to a hypergraph covering problem, we give bounds on the maximum size $\beta_{k,t}(n)$ of the families with ground set $[n]$.
Half-Graphs, Other Non-stable Degree Sequences, and the Switch Markov Chain
Authors: Erdős Péter L. , Győri Ervin , Mezei Tamás Róbert , Miklós István , Soltész Dániel
Published: July 2021

One of the simplest methods of generating a random graph with a given degree sequence is provided by the Monte Carlo Markov Chain method using switches. The switch Markov chain converges to the uniform distribution, but generally the rate of convergence is not known. After a number of results concerning various degree sequences, rapid mixing was established for so-called P-stable degree sequences (including that of directed graphs), which covers every previously known rapidly mixing region of degree sequences.

In this paper we give a non-trivial family of degree sequences that are not P-stable and the switch Markov chain is still rapidly mixing on them. This family has an intimate connection to Tyshkevich-decompositions and strong stability as well.
Forbidden Subgraphs of Power Graphs
Authors: Manna Pallabi , Cameron Peter J. , Mehatari Ranjit
Published: July 2021

The undirected power graph (or simply power graph) of a group $G$, denoted by $P(G)$, is a graph whose vertices are the elements of the group $G$, in which two vertices $u$ and $v$ are connected by an edge between if and only if either $u=v^i$ or $v=u^j$ for some $i$, $j$.

A number of important graph classes, including perfect graphs, cographs, chordal graphs, split graphs, and threshold graphs, can be defined either structurally or in terms of forbidden induced subgraphs. We examine each of these five classes and attempt to determine for which groups $G$ the power graph $P(G)$ lies in the class under consideration. We give complete results in the case of nilpotent groups, and partial results in greater generality. In particular, the power graph is always perfect; and we determine completely the groups whose power graph is a threshold or split graph (the answer is the same for both classes). We give a number of open problems.
Student, Faculty, and Graduate Teaching Assistant Perceptions of Support Provided by a Graduate Student Writing Centre
Authors: Handford Victoria , Dobson Joe , Liu Yuhang
Published: July 2021

The purpose of this mixed-methods study was to identify key factors in a discipline-specific, self-access graduate writing centre that both contribute to student success and that indicate needed improvements. The centre is located in a graduate education program at a university in Canada. Findings indicate the centre contributes to student success most directly by helping students improve their writing, which leads to an overall sense of confidence and engagement. Relationships with other students were also enhanced and found to be important. Faculty similarly noted that the improvements in writing and the strengthening of the graduate student culture were important gains. Graduate teaching assistants working in the centre said they benefited from improvements with their writing, which they linked to supporting students, as well as personal gains in their instructional skills. Suggested improvements included increasing appointment availability, adding workshops on new topics, increasing the availability of workshops and events, and increasing interaction between students and faculty at social events. These results indicate that providing targeted supports led by students but guided by faculty input and oversight can increase graduate student success and benefit graduate programs in general.
Farmers’ Perception of Coffee Agroforestry Systems in an Area Targeted for Organic Certification in Burundi
Authors: Ndihokubwayo Soter , Havyarimana Tharcisse , Windbühler Sarah , Niragira Sanctus , Habonimana Bernadette , Kaboneka Salvator , Megerle Heidi Elisabeth
Published: July 2021

Taking into account the current understanding of a system by farmers is an important starting point in every project aiming at the economic and social development of human beings. In the process of organic certification of coffee growers, training sessions on various topics are conducted. In addition to these sessions, there are field visits to farms by experts. And it is most often done through a top-down approach. A household survey was carried out on a purposive sample of households in the zone of the central plateaus in Burundi. Data were collected using a questionnaire through smartphones. Data analysis was carried out using IBM SPSS Statistics software by calculating means, frequencies and cross-analyses of variables. Results show that, besides bananas that are deliberately considered as shading crops, Grevillea robusta is the most frequent shade tree which is present on 62% of coffee plots. It is followed by an indigenous tree: Ficus sp. which is present on 14.6% of plots, and a fruit tree, Persea americana present on 13.9% of plots. The effects of shade trees on soil properties are well recognized by farmers. For their search of certification (75% of farmers are involved in the process of organic certification), chemicals application is banned. Farmers use a locally-made biopesticide decoction. They prepare it from a set of five plants: Tephrosia vogelii, Solanum aculeastrum, Neorautanenia mitis, Capsicum frutescens, and Tithonia diversifolia. This research has proven that the integration of shade trees in coffee plots is a reality in the region.
Feedforward Control of Quadratic Converters
Authors: Himmelstoss Felix A. , Votzi Helmut L.
Published: July 2021

DC/DC converters, which have a quadratic term of the duty cycle, are useful, when wide voltage transformation ratios have to be obtained. Taking a d-square step-down converter as an example, the function of the converter, the generation of the large and small signal models is explained. From the voltage transformation ratio, a control law is derived and the behavior of the feed-forward converter is shown by simulations. Results of two other quadratic converters are also shown.
Generating Cyclic Permutations: Insights to the Traveling Salesman Problem
Authors: Warren Richard H.
Published: July 2021

Some results for the traveling salesman problem (TSP) are known for a prime number of cities. In this paper we extend these results to an odd number of cities. For an odd integer n, we show that there is an algorithm that generates n – 1 cyclic permutations, called tours for the traveling salesman problem, which cover the distance matrix. The algorithm allows construction of a two-dimensional array of all tours for the TSP on an odd number of cities. The array has the following properties: (i) A tour on a vertical line in the array moves the salesman uniquely compared to all other tours on the vertical line. (ii) The sum of the lengths of all tours on a vertical line is equal to the sum of all non-diagonal elements in the distance matrix for the TSP.
Development of rational method of water injection for production of light hydrocarbon fluid deposited in reservoir in the last exploitation phase
Authors:   ", Hamidov N.N. ,   Oil-Gas Scientific Research Project",   Institute, Azerbaijan Republic
Published: July 2021

The complications in production of liquid hydrocarbons became immovable due to the retrograde phenomenon or degassing process in the last stage phase of exploitation of gascondensate, gascondensate-oil or light oil fields, operated in depletion mode have been researched and the impact of advanced method of water injection considered the most efficient for heterogeneous formation studied as well. For the efficiency increase of water injection process, a new polymer-disperse system injected into the reservoir in small dozes as a bank, therefore selectively closing the zones with high permeability and increasing the cover zone of injected reservoirs is proposed. Based on the polyacrylamide and taken bentonite clay samples from Dash Salahly field of Azerbaijan including the nanoparticles, a new composition of polymer-disperse system has been developed, as well as the efficiency of the system in laboratory investigations studied. To control the effectiveness of the new composition, a physical reservoir model based on similar conditions has been developed and the experiments carried out through a special procedure.
Multiphase technologies in oil-gas production
Authors:   Azerbaijan State University of Oil and Industry, Ismayilov G.G.
Published: July 2021

Emergency cases, complications, maximum energetic cost, human and material expenses, negative impact on the environment in the oil-gas production taking place in the system “ well – oil and gas collection” are predominantly associated with the multiphase and multicomponent well production. Considering the research results of recent years, we can mark that in the view of hydraulic properties of the flows and interactions of seperate phases, currently are formed multiphase technologies, on the basis of which solution of various issues and increase of efficiency of technological processes in production, collection, transportation and storage of oil and gas becomes possible. The paper reviews the perspectives of solution of few issues of oil-gas production using multiphase technologies, on the basis of which the phase interaction lies. Some problems of oil-gas production, the solution of which becomes possible with multiphase technologies are noted as well.
The role of financial analysis in activity of petroleum engineering enterprise
Authors:   Azerbaijan State University of Oil and Industry, Taghiyeva T.A.
Published: July 2021

The competition becomes topical as the major regu-lation mechanism of industrial process within market economy. The activity of each business unit under modern market conditions is the attention focus for a wide range of participants in market relations interested in the results of its functioning. To provide the survivability of the enterprise under modern conditions, the administrative staff foremost, should be able to really estimate financial state both its own enterprise and existing potential competitors.
Consideration of abnormal changes of seismo-geodynamic aspects in drilling process
Authors:   ", Veliyev H.O. ,   Oil-Gas Scientific Research Project",   Institute, Azerbaijan Republic, Kazimov E.A. ,   "Oil-Gas Scientific Research Project" Institute, Azerbaijan Republic
Published: July 2021

The paper deals with the study of seismo-geodynamic aspects associated with mud volcanoes, the analysis of the impact of earthquake factors outcome on construction process of oil-gas, gascondensate wells and the development of preventive measures towards reduction of risks in the drilling process in active zones. The task set has been solved by gathering and analyzing the seismo-geodynamic factors of the fields where drilling operations are carried out. Based on the study of seismic data of the active and dormant volcanoes the preventive measures are recommended for the optimum well drilling regime. Dynamic and kinematic parameters of seismic waves in the rocks have been analyzed in the context of Umid, Babek, Neft Dashlary fields and the regularities in their behavior specified as well. It was defined that the well drilling in geodynamic conditions for which complicated industry-related phenomenon is characteristic, particularly earthquakes, their epicenter is located at the depth of 10-15 km. It is recommended in such active zones with stress-deformed state to conduct drilling operations exactly in regulated regime with minimum risks to avoid various failures and complications.
Formation of sedimentation in oil mixing
Authors:   Azerbaijan State University of Oil and Industry, Ismayilova F.B.
Published: July 2021

As a result of the studies on the impact of the mixing of various sorts of Azerbaijani oils on their quality parameters, it was defined that in some correlations oil mixing is impossible as both rheological and physico-chemical parameters of these oils after mixing abnormally change. In the context of the oils from Bulla and Garachukhur fields it was specified that in 58:42 ratio percentage correspondingly, abnormal phenomenon is observed in parameter change. Moreover, various ballast deposition occurs due to the mixing. The paper studies the kinetics of deposition of different ballasts (resin, asphaltene and paraffins, as well as water, salt and mechanical impurities) in the mixture of incompatible oils. It was defined that the main mass of all ballasts is deposited during 8–10 hours. The studies justified that depending on the chemical composition of the oils, the incompatibility in the mixture may also be occured in intensive seperation of various ballasts.
Komponentenintegration in additiv gefertigte Bauteile/Interruption of the selective laser sintering process and resulting options
Authors: Becker Mark , Pfeffer Stefan , Springer Patrick , Cardenas Mario , Refle Oliver
Published: July 2021

Die additive Fertigung von Kunststoffbauteilen mit dem selektiven Lasersintern (SLS) hat sich für diverse Anwendungen etabliert und bietet durch die großen geometrischen Freiheiten vielfältige Anwendungsmöglichkeiten. Weitere Anwendungen wären zu erschließen, wenn diskrete Bauteile vollständig integriert werden könnten, sodass hybride Bauteile entstehen. Daher wurde am Fraunhofer IPA untersucht, ob und wie der SLS-Prozess unterbrochen und Komponenten vollständig umdruckt werden können.

 

The additive manufacturing of plastic components by means of selective laser sintering (SLS) is established for various applications , offers a broad range of possible applications due to the wide geometrical freedom. Further applications could be tapped into with discrete components being fully integrated, resulting in hybrid components. This is why Fraunhofer IPA investigated if and how the SLS process can be interrupted and components be completely reprinted.
PVD-Hartstoffschichten für Schleifwerkzeuge zum Bearbeiten von Superlegierungen/Wear resistant PVD coatings for cBN grinding tools
Authors: Hartig Jörg , Kirsch Benjamin , Aurich Jan C.
Published: July 2021

Das Aufbringen von Beschichtungen bei Werkzeugen mit geometrisch bestimmter Schneide gehört seit vielen Jahren zum Stand der Technik. Die Hartstoffschichten werden häufig mittels PVD-Technik auf dem Substrat abgeschieden. Die Schichten zeichnen sich durch eine hohe Härte und Verschleißbeständigkeit, sowie gute tribologische und chemische Eigenschaften aus. Dieses Eigenschaftsprofil bietet somit auch großes Potenzial zur Standzeitverbesserung von thermisch und mechanisch hochbeanspruchten Schleifwerkzeugen bei der Bearbeitung von Superlegierungen. In diesem Beitrag werden unterschiedliche Schichtsysteme auf ihre Anwendbarkeit auf galvanisch gebundene cBN-Schleifwerkzeuge untersucht und diskutiert.

 

The application of coatings to cutting tools with geometrically defined cutting edge has been state of the art for many years. The coatings are often deposited on the substrate using PVD technology. The coatings are characterized by high hardness and wear resistance as well as good tribological and chemical properties. Therefore, this property profile also offers great potential for improving the tool life of grinding wheels that are subject to high thermal and mechanical stress, especially during grinding difficult to machine materials. In the following article, different coatings are examined and discussed for their applicability to electroplated cBN grinding tools.
Ressourceneffizientes Umschleifen verschlissener VHM-Werkzeuge/Resource-efficient re-manufacturing of worn cemented carbide tools
Authors: Denkena Berend , Dittrich Marc-Andre , Wichmann Marcel , Friebe Sven
Published: July 2021

Aufgrund steigender Preise von Wolfram und Kobalt sind die Herstellkosten von Vollhartmetallwerkzeugen durch einen hohen Materialkostenanteil geprägt. Im Forschungsprojekt „Re-Tool 2“ erforscht das Institut für Fertigungstechnik und Werkzeugmaschinen (IFW) zusammen mit der Wulf Schleiftechnik GmbH einen Herstellungsprozess, um verschlissene Werkzeuge als Rohlinge für die Werkzeugherstellung zu verwenden. Durch einen Vergleich der Herstellung von umgeschliffenen und neugeschliffenen VHM-Werkzeugen soll das ökonomische und ökologische Einsparpotenzial der Methode gezeigt werden.

 

Due to the rising prices of tungsten and cobalt, the manufacturing costs of solid carbide tools are characterized by a high material cost share. In the research project „Re-Tool 2“, the IFW is researching in cooperation with Wulf Schleiftechnik GmbH a manufacturing process to use worn tools as blanks for tool production. By means of a comparison between the manufacturing and re-manufacturing process of tungsten carbide tools, the high economic and ecological savings potential is shown.
Industrie-4.0-Middleware geht in die Anwendung/Industrie 4.0 middleware enters the application stage
Authors: Kuhn Thomas
Published: July 2021

In dem Forschungsprojekt „Basissystem für die unternehmensübergreifende Produktionsunterstützung“ (kurz: BaSys überProd) arbeiten 21 Partner aus Wissenschaft und Wirtschaft an Lösungen für den Wandel hin zur digitalisierten, flexiblen Industrie-4.0-Produktion. Dabei kommt vor allem die Open-Source-Middleware Eclipse BaSyx zum Einsatz. Das Ziel: Repräsentative Anwendungsfälle in Wirtschaftsunternehmen umsetzen und das Wiederverwendungspotenzial der Lösungen für andere Kontexte herausarbeiten.

 

In the research project “Basissystem für die unternehmensübergreifende Produktionsunterstützung” (Basic system for cross-company production support; BaSys überProd for short), 21 partners from research and industry are working on solutions for the transition to digitalized, flexible Industrie 4.0 production. In this context, the open-source middleware Eclipse BaSyx, in particular, is being used. The goal is to implement representative use cases in industrial companies and to identify the reuse potential of the solutions for other contexts.
Zur Eignung von Industrial Augmented Reality/About the fit of industrial augmented reality – Systematic literature review, cross-sectional study, and operationalization
Authors: Lehmann Lukas
Published: July 2021

Organisatorische Fragen stellen eine große Herausforderung im industriellen Einsatz von Augmented Reality (AR) dar. Um die Eignung der Technologie für einzelne Arbeitsaufgaben bewerten zu können, wurde eine Systematic Literature Review durchgeführt. Anschließend wurden die Ergebnisse durch Interviews von Experten mit industrieller AR-Erfahrung hinterfragt und erweitert. So war es möglich, einen Fragen-Antworten-Katalog aus circa 130 Fragen zur Bewertung der Task-Technology-Fit-Faktoren von Industrial Augmented Reality zu entwickeln.

 

Organizational issues present a major challenge in the industrial use of augmented reality. To evaluate the suitability of the technology for individual work tasks, a systematic literature review was carried out. Subsequently, the results were questioned and expanded through interviews with experts having worked with industrial AR. Thus, it was possible to develop a questionnaire catalogue of about 130 questions for evaluating the task-technology fit factors of industrial augmented reality.