bluuebunny/crossref_metadata_2025 huggingface dataset:
Determinants of COVID Vaccination Willingness among Health and Non-Health Studies Students: A Cross-Sectional Study
Authors: Marendić Mario , Aranza Diana , Aranza Ivan , Vrdoljak Dario , Podrug Mario , Milić Mirjana
Published: May 2023

Students, as a relatively health-informed population group, may still have limitations in health literacy, which is a concern as students take increasing responsibility for their health and make independent health decisions. The aim of this study was to evaluate the overall attitudes towards COVID vaccination among university students and to investigate various factors contributing to vaccination willingness among health and non-health studies students. A total of 752 students from the University of Split were included in this cross-sectional study and completed a questionnaire that consisted of three sections: socio-demographic data, health status information, and information on vaccination against COVID-19. Results show that the majority of students of health and natural sciences were willing to be vaccinated, but the majority of students of social sciences were not (p < 0.001). Students who used credible sources of information had a more significant proportion of those willing to be vaccinated and the majority of students who used less credible sources (79%) or did not think about it (68.8%) were unwilling to be vaccinated (p < 0.001). Multiple binary logistic regression modeling shows that female gender, younger age, studying social sciences, negative opinion about the need to reintroduce lockdown and the effectiveness of epidemiological measures, and usage of less credible sources of information were the most important factors contributing to increased vaccination hesitancy. Therefore, improving health literacy and restoring trust in relevant institutions can be critical in health promotion and COVID-19 prevention.
Chronic Progressive Lymphedema in Belgian Draft Horses: Understanding and Managing a Challenging Disease
Authors: Brys Marieke , Claerebout Edwin , Chiers Koen
Published: May 2023

Chronic progressive lymphedema (CPL) in draft horses is characterized by increased dermal thickness and fibrosis, with the development of skinfolds and nodules, hyperkeratosis, and ulcerations on the distal limbs of affected horses. Secondary bacterial, fungal, or parasitic infections frequently complicate and aggravate the lesions, as well as the progression of this disease. CPL has a particularly high prevalence of up to 85.86% in the Belgian draft horse breed. Due to the disease’s progressive and incurable nature, affected horses are often euthanized prematurely. The treatment options are solely symptomatic, aimed at improving the horse’s quality of life. Despite the severity of this condition, many uncertainties about its etiology and pathogenesis still remain to date. The established scientific research on CPL is rather limited, although there is an urgent need for strategies to tackle this disease. This review summarizes the available knowledge, serving as a guideline for practitioners, and provides perspectives for future research programs.
Integration of Network Pharmacology and Molecular Docking to Analyse the Mechanism of Action of Oregano Essential Oil in the Treatment of Bovine Mastitis
Authors: Cao Guangjie , Liu Jing , Liu Huan , Chen Xiaojie , Yu Na , Li Xiubo , Xu Fei
Published: May 2023

The active components, potential targets, and mechanisms of action of oregano essential oil in the treatment of bovine mastitis disease were investigated using network pharmacology and molecular docking approaches. The TCMSP and literature databases were examined for the main compounds in oregano essential oil. Afterward, the physical, chemical, and bioavailability characteristics of the components were evaluated. The PubChem, BATMAN, PharmMapper, and Uniprot databases were utilized to predict the target genes of the major components of oregano essential oil. Via the databases of DrugBank, OMIM, GeneCards, TTD, and DisGenet, the disease targets of bovine mastitis were discovered. We analyzed common targets and built protein–protein interaction (PPI) networks using the STRING database. Key genes were analyzed, obtained, and compound–target–pathway–disease visualization networks were created using Cytoscape. For the GO function and KEGG pathway enrichment analysis, the DAVID database was utilized. Molecular docking via Autodock Tools was utilized to evaluate the reliability of the interactions between oregano essential oil and hub targets. Thymol, carvacrol, and p-cymene are the three major components found in oregano essential oil. The potential targets (TNF, TLR4, ALB, IL-1β, TLR2, IL-6, IFNG, and MyD88) were screened according to the visual network. The enrichment analysis suggested that the major signaling pathways in network pharmacology may include PI3K-Akt, MAPK, IL-17, and NF-κ B. Molecular docking analysis shows that thymol had good docking activity with TNF, IL-6, and MyD88, carvacrol had good docking activity with TNF, and p-cymene had good docking activity with ALB. This study clarified the mechanism of action of oregano essential oil in the treatment of bovine mastitis, thus providing data supporting the potential for the use of oregano essential oil in the development of new therapeutics for bovine mastitis.
Evaluation of the Immune Response to Transport Stress in the Aosta Valley Breed
Authors: Pagliasso Giulia , Moriconi Martina , Fusi Francesca , Vitale Nicoletta , Vevey Mario , Dondo Alessandro , Razzuoli Elisabetta , Bergagna Stefania
Published: May 2023

Transportation is a recurring event in a farm animal’s life, and it is considered one of the main stressors with possible negative repercussions for both the health and welfare of farm animals. The objective of the present study was to examine the effect of transportation on some blood variables of 45 young bulls moved from their original farms to a livestock collection centre. Transportation took no more than 8 h and was carried out between January and March 2021. Blood samples were taken before transportation (T0), upon arrival at the collection centre (T1), and 7 days after arrival (T2). Samples were processed for blood cell count, clinical chemistry analyses, serum protein electrophoresis, and the evaluation of innate immunity parameters. The results showed a typical stress leukogram with neutrophilia and changes in the neutrophil:lymphocyte ratio. No significant alterations were observed in either serum proteins or pro-inflammatory cytokines. Significant, albeit transient, alterations were observed in some clinical chemistry parameters after transportation, which could be accounted for by stressful conditions such as the transportation itself and handling and mixing with other animals. Our results indicated that the adopted transportation conditions only slightly affected the blood variables under study with no significant impact on animal welfare.
Comparison of the Efficiency of Single-Locus Species Delimitation Methods: A Case Study of a Single Lake Fish Population in Comparison against the Barcodes from International Databases
Authors: Karabanov Dmitry P. , Kotov Alexey A. , Borovikova Elena A. , Kodukhova Yulia V. , Zhang Xiaowei
Published: May 2023

To date, a rather large set of both mathematical theories for species delimitation, based on single-locus genetic data, and their implementations as software products, has been accumulated. Comparison of the efficiencies of different delineation methods in the task of accumulating and analyzing data with reference to different taxa in different regions, is vital. The aim of this study was to compare the efficiency of fifteen single-locus species delimitation methods using the example of a fish species found in a single lake in European Russia (Lake Plescheyevo) with reference to other sequences of revealed taxa deposited in international databases. We analyzed 186 original COI sequences belonging to 24 haplotypes, and 101 other sequences previously deposited in GenBank and BOLD. Comparison of all 15 alternative taxonomies demonstrated that all methods adequately separate only the genera, while the number of delimited mOTUs differed from 16 (locMin) to 43 (HwM/CoMa). We can assume that the effectiveness of each method is correlated with the number of matches based on Ctax and MatchRatio criteria. The most comparable results were provided by bGMYC, mPTP, STACEY, KoT and ASAP and the most synchronous results were obtained from bGMYC, mPTP, STACEY and ASAP. We believe that these results are maximally realistic in the number of revealed mOTUs. A high genetic diversity, resulting in the existence of several mOTUs and phylogenetic lineages within many species, demonstrates the usefulness of the “polymorphic species” concept, which does not underestimate species richness and does not prevent the rational use and protection of biodiversity.
SPATIAL ORGANIZATION OF A STREET SECTION DEPENDING ON THE NATURE OF USE
Authors: Bannikova L.
Published: May 2023

This Article considers ways of optimization of street cross-section profiles in big cities in order to create comfortable urban environment. Importance of the topic has arisen from reconsideration of the role of street-and-road networks in cities, and their transformation from zones of transit into public space and city-life concentration zones. The article presents an analysis of regulatory documents and research works on design and layout of cross-section profile elements. It includes results of field survey and urban development analyses of Yekaterinburg city streets carried out with the purpose to identify problems of current street-and-road networks in major cities and actual street space distribution among users. The Article shows key users of the city streets, as well as requirements to cross-section profile elements. The proposed approach to street-space reorganization offers assignment of ‘user importance index’, which determines the cross-section profile elements. The ‘user importance index’ characterizes use of a street section by a specific user. The criteria by which the «index of importance» of each group of street section users is determined are described. The concluding part of the Article describes one of the cross-section profiles developed for Yekaterinburg using the given approach. It also includes approbation of the mentioned research in the course of work on Standards for Complex Street-and-Road Network Improvement in Yekaterinburg.
DETERMINATION OF THE DEXTERITY INDEX AND DETECTION OF SPECIAL POSITIONS OF THE PARALLEL MANIPULATOR
Authors: Duyun I. , Kabalyants P. , Zuev S.V. , Duyun T. , Malyshev D.I.
Published: May 2023

The article presents a model, tools, methodology and results of identifying special provisions when planning the movement of a parallel manipulator such as the Gough-Stewart platform. Special positions are understood as positions having geometric uncertainty, singularity. Singular positions are estimated by analyzing the Jacobian matrix using its singular value decomposition. The calculation of the Jacobi matrix and its singular values is performed using special libraries of the high-level Python programming language. The presence of special positions in the workspace is analyzed using the dexterity index, which characterizes the ratios of the singular values of the singular value decomposition of the Jacobian matrix. A series of computational experiments are carried out to calculate the dexterity index, identify and analyze special positions in the working area. The results of a computational experiment for various design versions of the platform, which differ in the ratio of the radii of the movable platform and the fixed base, are presented. The analysis of the characteristic features of the formation of singularity zones in their working zones is carried out and design options are identified that have the maximum dexterity index of the working area. The presented approach is applicable in the framework of the development, modernization, optimization of structural elements of parallel structure manipulators.
INSTRUMENTAL THERMAL ENGINEERING INSPECTION OF BUILDING ENCLOSING STRUCTURES BEFORE MAJOR REPAIRS
Authors: Ryazancev O. , Trubaev P. , Koshlich Yu. , Dotsenko D. , Buhanov D.
Published: May 2023

The analysis of the results of the instrumental thermal engineering survey of 22 multi-apartment residential buildings built of silicate and ceramic bricks or reinforced concrete panels, with a service life of buildings of more than 40–50 years, carried out before major repairs is given. Thermal calculations to determine the savings in energy resources showed an average value of savings in thermal energy after insulation of 28 %. Typical defects of enclosing structures identified during thermal imaging examination are presented and systematized. An external examination by infrared thermography is carried out with a thermal imager, followed by processing of thermograms. The absence of influence of the results of thermal imaging examination on the parameters of the insulation is shown. The results of measurements of resistance to heat transfer are presented. The measurements are made using ten-channel heat flux density and temperature meters. The actual measured heat transfer resistance deviated from the design resistance by an average of 16 per cent to 33 per cent. The heat transfer resistance of the wall before insulation is much less than the value of the heat transfer resistance of the insulation and the final resistance of the multilayer wall structure. The error in determining the thermal resistance of the insulated wall does not affect the required thickness of the insulation. It is concluded that the instrumental examination of the enclosing structures of buildings before a major overhaul seems to be redundant. It is recommended to use a typical thickness of insulation during the overhaul of Soviet-built residential buildings, which for the climatic conditions of the Belgorod Region will be 10 cm of mineral wool insulation.
REGIONAL FEATURES AND CURRENT STATUS OF HISTORICAL DEVELOPMENT OF SYRIAN CITIES (ON THE EXAMPLE OF DAMASCUS)
Authors: Shipley A. , Ladik E.
Published: May 2023

. In the modern period, the cities of Syria are faced with unprecedented destruction of historical buildings due to military operations in the country. In this regard, the historical cities of Syria need to study the current state of the urban environment in order to determine the promising directions and principles for its restoration, considering regional characteristics. The article discusses the specifics of the planning structure of the historical cities of Syria and their modern urban planning problems on the example of the city of Damascus. The authors of the study carried out a retrospective analysis and identified the main stages of the historical development of the central part of the city of Damascus (Roman, Islamic, French and modern), conducted a comparative analysis of the development stages of the historical Syrian cities of Aleppo and Latakia. The planning structure of the historical city center, its current location in the city structure, the state of cultural heritage sites, as well as transport and pedestrian accessibility are analyzed. The analysis revealed a number of urban planning problems, including: the spread of destruction in the structure of the city, the destruction of cultural heritage sites, the formed illegal residential development, the insufficient number of green areas in the central part of the city, problems associated with transport infrastructure, etc., promising directions for their solutions
Leadership, a way of life that should be teached from the beginning of school education
Authors: Vieyra-Reyes Patricia , Bernal-Garcia María Paula , Trujillo-Condes Virgilio Eduardo
Published: May 2023

Context: Leadership is a quality that is reflected in attitudes and actions. It is built on the abilities of individuals and groups.It helps in decision making to achieve objectives that improve lifestyles, exploit skills and attitudes, and provide practical and effective solutions to everyday problems. In a globalized world, the leader can learn and enhance their knowledge about living with different cultures, languages, dialects, and ages. Objective: To analyze and explain, based on the literature, why leadership is a way of life that should be taught from the beginning of school education. Method: A systematic review of specialized literature was carried out using the following search engines: Library of Congress, Scholar Google, and Redalyc. Purpose: a) to define leadership, b) to show tools that support the teaching of leadership, c) to inform about the importance of teaching leadership. Results: Teaching leadership requires preparation and support, teachers should encourage students to stay motivated, enthusiastic to learn; teach them to deduce, distinguish, and form themselves. Conclusions: Leadership is a way of life that leads to the transformation of society. Not preparing leaders contributes to form people who are limited at a competitive level and in decision making.
«La batalla de los muertos» de Juan Iturralde y Suit: en torno al mito nacionalista euskaro
Authors: Yániz Javier
Published: May 2023

Este trabajo aborda la leyenda «La batalla de los muertos» de Juan Iturralde y Suit como documento que ayude a explicar la construcción del universo mítico euskaro a finales del siglo XIX. Para ello, se ofrece una lectura de la leyenda como fuente etnográfica y como testimonio de la propuesta ideológica defendida desde Asociación Euskara de Navarra. Por otro lado, se analizan también otros textos afines a la asociación: Orreaga de Arturo Campión y las descripciones euskaras de Iturralde y Suit. Por último, se analiza el desarrollo de la Revista Euskara y su importancia en torno a la constitución del mito nacionalista euskaro.
Errepublika garaiko izenak eta 1939ko dekretua
Authors: Gorrotxategi Nieto Mikel
Published: May 2023

Lan honetan Errepublika garaian euskal izenen erabilera eta Diktadura garaiko errepresioa aztertzen dira. Horretarako Bilboko Zazpikaleak, Barakaldo, Arabako Lautada, Orozko eta Urduña arakatu ditugu. Euskal izenekin batera zentsuratu ziren beste izenak (Libertad, Amor...) ere bildu dira. Erabilera gora joan zen eta Bilbon %10 izatetik %23 izatera heldu zen. Ezabatzeko erabilitako bideak desberdinak izan ziren erregistroetan. Amaitzeko legeak baimendu zuenean berreskuratutako izenak ere aztertu dira.
Camino ‘bide’ en la toponimia vasca
Authors: Gorrotxategi Nieto Mikel
Published: May 2023

En el presente trabajo se estudian los topónimos compuestos de bide ‘camino’ y nombres de localidad. Este tipo de topónimos ha sido de gran ayuda a la hora de conocer las formas eusquéricas de los nombres de localidades donde se ha perdido el euskera. Ejemplos de esta información son nombres como Errezubidea ‘El camino a Riezu’ o Langarabidea ‘El camino a Nanclares’. Se estudia la estructura, ya que en algunos casos aparecen desinencias como -ko ‘de’ o -ra ‘hacia’, aunque son más los que no tienen ningún caso. También se estudia su distribución espacial. De esta forma se puede ver que este tipo de topónimos está íntimamente relacionado con la orografía y que no se dan en la Euskal Herria atlántica. Como colofón se incluyen los topónimos relacionados con el Camino de Santiago.
Universitas
Authors: Paquot Thierry
Published: May 2023

Le mot « université » désigne aussi bien le lieu où se déroule l’enseignement supérieur que la relation entre un enseignant et un ou plusieurs enseignés. Avec la massification des études post-baccalauréat, l’université est devenue une institution démesurée qui peine à retrouver ce qui caractérisait son origine. Retour sur l’histoire de l’université pour mieux en anticiper le devenir…
L’enseignement supérieur divise : généralisation des études, différenciation des jeunesses
Authors: Millet Mathias
Published: May 2023

Cet article se propose de faire, à grands traits, le bilan de quelques évolutions récentes de l’enseignement supérieur. Satisfaire à cet exercice impose d’abord de prendre la mesure des transformations quantitatives qui l’ont marqué ces dernières décennies. Mais si la croissance rapide du nombre d’étudiants depuis les années 2000 s’apparente à une « troisième explosion scolaire », celle-ci emporte aussi des changements de nature plus qualitative sur lesquels il faut s’arrêter. C’est bien, en effet, le sens et la place que les études supérieures prennent désormais dans les trajectoires et les attentes des nouvelles générations qui se trouvent modifiés. L’article revient également sur la manière dont les changements structurels de l’enseignement supérieur ont fait de celui-ci un nouveau lieu d’injonctions normatives autour, par exemple, de l’orientation, de l’innovation pédagogique ou de l’entrepreneuriat. Il souligne enfin combien les transformations de l’enseignement supérieur se réalisent dans un contexte en apparence paradoxal : ouvert au plus grand nombre, ce dernier est aussi plus segmenté, les inégalités et divisions inscrites dans son organisation y prenant une acuité toute particulière.
Parcoursup et la reconfiguration des inégalités dans l’enseignement supérieur français
Authors: Frouillou Leïla
Published: May 2023

À partir d’une synthèse de travaux récents sur Parcoursup, cet article invite à considérer plus largement la reconfiguration des inégalités dans l’enseignement supérieur français. Parcoursup étend en effet la sélection sur dossier scolaire à l’ensemble des formations du supérieur, y compris les licences jusqu’ici accessibles avec le baccalauréat. Dans un contexte de croissance démographique étudiante et de saturation de certaines capacités d’accueil, le classement de tou·te·s les candidat·e·s par toutes les formations peut se lire comme une accentuation de la mise en concurrence. Cela peut se traduire, dans les contextes denses comme la région parisienne et pour les formations saturées comme le droit, par de fortes évolutions dans les caractéristiques scolaires des publics. Ainsi, en essayant d’articuler une histoire des dispositifs d’orientation et d’affectation à celle des moments de massification du système scolaire, ce texte propose une réflexion sur une récente reconfiguration des inégalités scolaires en France, liée à un « nouvel âge de la sélection » marquant notamment l’entrée dans le supérieur.
Réformes de l’université : transformations des géographies d’un service public français
Authors: Vergnaud Camille , Noûs Camille
Published: May 2023

L’approche géographique des politiques publiques à l’égard des universités françaises a un temps visé la répartition et l’homogénéisation des établissements pour favoriser un équilibre territorial et une égalité d’accès à l’enseignement supérieur dans un contexte de démocratisation et de massification étudiante après la seconde guerre mondiale. Ces objectifs – articulant modèle universitaire et conception républicaine du service public – sont aujourd’hui transformés à l’aune de la compétitivité et de la visibilité internationale. La gestion de l’Enseignement supérieur et de la Recherche s’appuie désormais sur la sélection par mise en compétition, et sur la concentration des financements pour favoriser quelques établissements uniquement, considérés comme plus performants. Cet article questionne cette nouvelle logique présentée comme inégalitaire, mais juste, et montre que sa traduction spatiale remet en cause les principes d’équivalence, d’équité et d’équilibre territorial. Encouragées à développer leurs ressources propres et à se distinguer dans la compétition organisée par l’État, les universités se tournent davantage vers leurs territoires d’ancrage, développant à leur égard des stratégies territoriales. Un détour par le cas des universités privées à but non lucratif états-uniennes, ayant une obligation d’intérêt général et une implication territoriale bien plus marquée qu’en France, met en avant les ambivalences, voire les tensions possibles entre des objectifs de financement et de promotion de l’établissement par le territoire (financements, image de marque, visibilité), et les missions académiques de l’institution.
Les instituts universitaires de technologie : des spécificités originelles aux transformations récentes
Authors: Tralongo Stéphanie
Published: May 2023

Les instituts universitaires de technologie (IUT) ont été créés en France dans les années 1960 dans une perspective de diversification des premiers cycles universitaires et de mise en dialogue avec le monde des entreprises. Plus de cinquante ans d’existence permettent de dresser une synthèse des spécificités originelles aux transformations les plus récentes, balayant à la fois les dimensions institutionnelles, organisationnelles, pédagogiques, sans oublier les caractéristiques des publics accueillis. Généralement reconnus pour la visée professionnalisante des formations, les IUT sont aujourd’hui en pleine transformation : le diplôme universitaire de technologie (DUT) bascule en bachelor universitaire de technologie (BUT), au moyen de la mobilisation massive d’une approche par compétences. La question reste ouverte des manières par lesquelles cette approche va être mise concrètement en place et permettre de traiter des problématiques d’inégalités des chances et de réussite des étudiants.
Purification of water with high permanent hardness and salinity
Authors: Касаточкин А.С. , Ларионов С.Ю. , Харитонов Н.А. , Шилов М.М. , Савочкин А.Ю. , Рябчиков Б.Е.
Published: May 2023

Реагентные методы умягчения широко применяются в практике водоподготовки, прежде всего в энергетике и промышленности для умягчения, декарбонизации и обесцвечивания воды. Совместно с использованием обратного осмоса они дают возможность получать воду необходимого качественного состава. Для питьевого водоснабжения методы умягчения используются достаточно редко в связи с рядом обстоятельств, таких как необходимость применения различных реагентов, не свойственных для коммунального водоснабжения, образование большого объема шламов, требующих последующей переработки и, главное, получение в результате сильнощелочной воды с рН более 10, что недопустимо для питьевой воды. Однако, если доступны источники воды только с таким сложным составом, тогда приходится использовать реагентные методы. В научно-производственной компании АО «НПК «Медиана-Фильтр» были проведены исследования по получению качественной воды из подземного источника нехарактерного солевого состава, с большим содержанием сульфатов и малой щелочностью, причем технология очистки должна иметь минимальный объем жидких отходов. После проверки нескольких вариантов технологий на пилотных установках была предложена схема, удовлетворяющая требованиям заказчика. Следует отметить, что подземные воды южных районов страны имеют частично схожий солевой состав, поэтому результаты пилотных испытаний могут быть применимы и для получения питьевой воды из таких источников.

Chemical softening methods have been widely used in the practice of water treatment, primarily in the energetics and industry for softening, decarbonization and decoloration of water. In combination with reverse osmosis, they provide for preparing water of the required qualitative composition. In drinking water supply softening methods are used quite rarely due to a number of circumstances, such as the need to use various chemicals that are not typical for public water supply; generation of a large volume of sludge subject to subsequent processing, and, what is most important, resulting in highly alkaline water with pH of more than 10 unacceptable for drinking water. However, in case only but water sources with such a complex composition are available, then chemical methods have to be used. In Mediana-Filter Research and Production Company, JSC studies were carried out to obtain high-quality water from an underground source of uncharacteristic salt composition, with a high content of sulfates and low alkalinity, provided that the purification technology should generate minimum liquid waste. After testing several technology options in pilot plants, a scheme was proposed that met the requirements of the customer. It should be noted that underground water of the southern regions of the country has a partially similar salt composition, so the results of pilot tests can also be applied to obtain drinking water from similar sources.
Perbandingan Pengaturan Status Penanaman Modal Perseroan Terbuka dalam Undang-Undang No. 1 Tahun 1967 tentang Penanaman Modal Asing juncto Undang-Undang No 6 Tahun 1968 tentang Penanaman Modal dalam Negeri dan Undang-Undang No. 25 Tahun 2007 tentang Penan
Authors: Amira Arianti Nur
Published: May 2023

Penanaman modal melalui perseroan terbuka merupakan penanaman modal secara tidak langsung atau melalui portofolio. Aspek yang cukup penting dalam pengaturan penanaman modal adalah status penanaman modal. Dalam penelitian ini akan dianalisis perbandingan pengaturan status penanaman modal perseroan terbuka dalam Undang-Undang No.1 Tahun 1967 tentang Penanaman Modal Asing (UU No.1/1976) juncto Undang-Undang No.6 Tahun 1968 tentang Penanaman Modal dalam Negeri (UU No.6/1968) dan Undang-Undang No.25 Tahun 2007 tentang Penanaman Modal (UU No.25/2007) untuk memberikan masukan kepada para stakeholder yang berwenang mengatur mengenai penanaman modal dan perseroan terbuka di Indonesia terkait perlunya pembentukan peraturan yang terkait pengaturan status penanaman modal perseroan terbuka setelah terbitnya UU No. 25/2007. Metode penelitian yang digunakan dalam penelitian ini adalah metode penelitian yuridis normatif dengan pendekatan kualitatif. Berdasarkan pembahasan, ditemukan simpulan bahwa sebelum terbitnya UU No.25/200, perseroan terbuka memiliki status penanaman modal dan kriteria-kriteria yang jelas untuk diklasifikasikan sebagai Penanaman Modal Asing (PMA) atau Penanaman Modal Dalam Negeri (PMDN). Sementara itu, sesudah terbitnya UU No.25/2007, tidak terdapat pengaturan mengenai status penanaman modal perseroan terbuka dikategorikan PMA atau PMDN, maupun aturan yang menyatakan tegas bahwa perseroan terbuka diperlakukan seperti PMDN tanpa melihat entitas pengendali di dalamnya. Oleh karena hal tersebut, diperlukan pembentukan aturan yang jelas mengenai status penanaman modal perseroan terbuka untuk memberikan kepastian hukum.
STRATEGI PENGEMBANGAN PARIWISATA KOTA CILEGON: PELUANG & TANTANGAN
Authors: Keiko Hubbansyah Aulia , Baharuddin Gunawan , Munira Mira
Published: May 2023

Tujuan dari penelitian ini adalah memetakan potensi wisata dari beberapa alternatif destinasi wisata di Kota Cilegon, dengan mengidentifikasi masalah utama yang menghambat pengembangan destinasi pariwisata dan merumuskan strategi pengembangan destinasi wisata di Kota Cilegon. Penelitian ini menggunakan metode kualitatif dengan pendekatan eksploratif dengan dua pendekatan. Pertama, identifikasi masalah dan solusi pemberdayaan masyarakat, khususnya di daerah yang menjadi lokasi penelitian. Kedua, analisis SWOT. Hasil observasi menilai bahwa Bukit Teletubbies memiliki nilai komersial yang lebih tinggi dibandingkan Gua Jepang dan Makam Syekh Djamaluddin. Dari puncak Bukit dapat dilihat pemandangan Selat Sunda dan pesisir laut yang indah. Selain itu, banyak aktivitas wisata yang mungkin dilakukan, mulai dari hiking, camping, hingga melihat sunset. Berdasarkan pendekatan MAAMS diidentifikasi beberapa faktor permukaan yang membuat belum optimalnya Bukit Teletubbies sebagai destinasi wisata di kota Cilegon. Munculnya faktor-faktor ini dikarenakan belum adanya program pendampingan dan pemberdayaan warga, keterbatasan modal pemilik lahan, wilayah menuju lokasi yang dipadati oleh pemukiman warga, serta kurangnya literasi SDM pengelola objek wisata atas berbagai aspek manajerial dan teknologi. Akar dari permasalahan ini, berdasarkan analisis MAAMS, adalah kurangnya alokasi anggaran pemerintah daerah untuk pemberdayaan sektor pariwisata.
Pemodelan Manajemen Proyek Rekayasa Dolly Kitting Sebagai Alat Bantu Feeding Material di Jalur Produksi Perakitan Mobil
Authors: Ridwan Ridwan , Susanto sudiro Susanto
Published: May 2023

The development of the Indonesian Automotive Industry in 2019 is expected to remain significant, this is shown from the sales of various brand vehicles in Indonesia which experienced an increase in 2018. To meet existing market demand, automotive companies need additional new investment in the form of various production equipment to anticipate schedules planned production. One type of production aids needed in car assembly lines is Rack, Tolley, Box (RTB) and Dolly Kitting. The demand for production aids is a real market opportunity, and this must be utilized by the local industry to take part in the development of the national automotive industry by supporting all of the automotive industries from all lines, one of which is in the process of providing RTB as a process aid production. PT ABC as one of the local producers of RTB providers, Dolly Kitting, seeks to seize this opportunity by implementing GMP. The methodology used is an engineering project management approach based on the principle of good manufacturing practices (GMP). From the model created, a product development engineering model can be prepared to deliver the product to the customer. Model conformity verification is carried out at various critical manufacturing points including product development, prototyping, production process preparation (3P) and ending with validation on the production floor through commercial prototypes before the product is released for commercial purposes as a method of maintaining product QCD.

Keywords: Dolly Kitting, Project Management, QCD.
Pemanfaatan Energi Biogas untuk Pembangkit Listrik di Desa Tuwang Kecamatan Karanganyar Kabupaten Demak
Authors: Muhammad Sukron  , Iskendar Iskendar
Published: May 2023

The Increase of energy demand in Indonesia causes the need for alternative energy to replace fossil energy. One of alternative energy is renewable energy that obtained from nature freely. Tuwang Village in Karanganyar District, Demak Regency has the potential for renewable energy from methane gas produced by cow dung on farms. Cow dung is tested in the laboratory to take the methane gas content. Two chambers biodigester from fiberglass are used to ferment and hold biogas which is then used as fuel on the stove. From 171 kg of cow manure that mixed with water in a ratio of 1:3, the ideal digestification time with the highest energy production of 689 kJ is 22 days. The average of CH4 composition is around 50% from the total of biogas content. The total energy obtained during the water heating process is 4.32 MJ, smaller than the theoretical energy calculation (20,52 MJ). Based on the results of experiments, it can be estimated that biogas energy generated from Tuwang Village each day is 40,42 MJ. Biogas energy power plant can use a genset or stirling engine with 468 Watt of power. This power can be used for neighborhood association lighting needs.
Pengembangan Bioaditif Serai Wangi Pada Bahan Bakar Bensin Terhadap Performa Mesin Dan Emisi Gas Buang Sepeda Motor
Authors: Utomo Wisesa Budi , Dahlan Dahmir
Published: May 2023

Bio-additives are elements derived from plants that are utilized as additives to improve fuel quality. Lemongrass fragrant oil is one of the types used as bio-additives that are volatile and soluble into fuels. The purpose of using this bio-additive is to improve the performance of the machine, but the resulting emissions must be in permissible regulations. This research was conducted by experimental methods, some of the tested samples consisted of gasoline (Pertalite), then the development was done by adding the element of lemongrass aromatic bio-additive on the fuel with a ratio of 1.5:1000 ml, 2.0:1000 ml, 2.5:1000 ml, 3.0:1000 ml, and 3.5:1000 ml. The sample test was carried out to measure engine performance, exhaust emissions, using Sportdevice Dyno and Emission Tester. Also, fuel consumption testing is carried out to determine the efficiency of fuel consumption. The results of this study the use of a fragrant lemongrass bio-additive can improve the performance of the motorcycle, maximum power increased by 3.11% at a ratio of 3.0:1000 ml and optimum torque are achieved at 2.03% at a ratio of 2.0:1000 ml. Then the result of exhaust emission measurement of HC and CO elements arising from the use of lemongrass bio-additives is still environmentally friendly In addition to the testing, fuel consumption measurement is also done by generating a savings of 20.93%, mileage 69.9 Km/L ratio using a ratio of 3.5:1000 ml.
Studi Pengaruh Derajat Kemiringan Tool Head Terhadap Hasil Pengelasan Friction Stir Welding (FSW)
Authors: Muhamad Leon Habibi  , Fanani Muhamad Zainal
Published: May 2023

Aluminum and its alloys are non-ferrous metals which are widely used in the shipping industry because aluminum is a lightweight metal, has a relatively high tensile strength and good corrosion resistance. Friction-stir Welding (FSW) is a welding that is widely used on thin aluminum plates. The heat input of the FSW welding is affected by the degree of tilt of the head tool to the material. This study aims to determine the optimal degree of slope in FSW welding. The parameters used in this study are 1500 rpm rotational speed, 1.33 mm / s welding speed with the same material thickness of 4mm and the type of connection used by lap joint refers to the AWS standard. In this study, the tool head tilt variation is 0o, 1o, 2o and 3o and the effect on the welding results. The results of the study show that welding with a slope angle of 0 ° and 1 shows visible defects or undercut defects caused by overheating when welding. The results of welding with a degree of slope 2 show the results of welding is good at the beginning of welding, but in the middle of welding visible defect undercut. Tilt angle welding shows the best results with no visible defects due to welding. The results showed that visually the results of welding with a slope angle 3 degree had the best results. This was due to the heat input on the welding with the head tool tilt not excessive so there was no visual defect.
Studi Simulasi Pengaruh dari Pitch dan Kecepatan Alir Fluida Kerja Terhadap Koefisien Perpindahan Panas Menyeluruh di Conical Cavity Absorber
Authors: Muslim Jusva Agus , Firman Laode M
Published: May 2023

The energy crisis has become a global issue that must be resolved immediately through the use of new and renewable energy sources. Indonesia is geographically benefited because it is on the equator so that it gets a supply of sun throughout the year. This advantage is an added value for the application of solar-based energy systems. Concentrated Solar Power (CSP) system is an energy system based on solar thermal energy to generate electricity. The parabolic dish model in CSP has been shown to have the highest efficiency of up to 32%. The fundamental challenge of improving performance on the parabolic dish model is the design of the cavity receiver used. Cavity receiver functions to absorb heat from the reflector and distribute it to the system through the working fluid (Heat Transfer Fluid). This article specifically discusses the simulation of conical cavity receivers with a focus on the effect of pitch and fluid flow velocity in the system through Computational Fluid Dynamic (CFD) ANSYS. Simulation results on nine different variables show the effect of pitch and flow velocity on the overall transfer coefficient on cavity. The results of this simulation can be used as a basic reference in an effort to improve the heat transfer performance of cavity, which in turn can affect the overall performance of a Concentrated Solar Power Parabolic Dish type system.
Optimasi Penggunaan Manipulator pada Sensor O2 Untuk Menaikkan Performa Scooter Dengan Mode Transmisi Matic 4 Langkah
Authors: Ridzal  , Ruslan Wegie
Published: May 2023

Technological developments, especially in the automotive industry, have experienced rapid development, this can be seen in the production of motorbikes, where many users really want the performance of their vehicles. This research is a different solution from previous studies that have been done before, where previous research replaced the O2 sensor with a manipulator, this research was carried out by keeping the O2 sensor installed, only in pairs of resistors. So that the O2 sensor output voltage can be manipulated before being accepted by the ECU. The voltage at the output can be manipulated by providing a resistance on the O2 sensor which previously went to the Electronic Control Unit, by adding several resistance variables which are valued between 0.5 ggt`6Ohm up to a value of 2 Ohm. Retrieval of data to be able to perform testing techniques on engine performance, namely by using the Dynojet Chassis technique, with the addition of several variables for engine speed, starting from a variable of 3000 rpm to 9000 rpm, so as to be able to find out how much value is in the role of change The output of electric current on the oxygen sensor, namely the torque and power in the sample used in this study, is a scooter with a 4-step automatic transmission mode. Based on several parameters generated from the test along with the analysis results from data processing, the conclusion of this study is that the use of a manipulator on the O2 sensor can actually be used to increase the performance of a scooter with a 4-step automatic transmission mode
STUDI ANALISIS KINERJA POMPA AIR DENGAN MENGGUNAKAN SUMBER LISTRIK DARI PANEL SURYA
Authors: Sulanjari  , Setiyono Joko
Published: May 2023

In areas of Indonesia that are crossed by the equator, the availability of sunlight is very potential and all day. Therefore in the case of application as a source of electrical energy to drive a water pump with a set of solar cell panels it is very possible. The level or intensity of sunlight illumination from sunrise to sunset is very different. The intensity of sunlight is certainly very influential on the ability of solar cell panels to convert them into electrical energy.Surely it will have an impact on the performance of the solar water pump system. Thus in this study will test the performance and analyze the performance of water pumps driven using electricity from solar cell panels. To achieve this goal measurements of the power generated by solar panels starting from 12:00 WIB to 16:00 WIB for three days (three repetitions) were carried out in the open field programmed in the Mechanical Engineering Study of Pamulang University. Data collection is done by measuring the intensity of sunlight, battery input power, and water discharge.The solar panel used is 100wp capacity, the highest solar panel power produced is 25.3W at 12:00 WIB with an intensity value of 114700 lux, while the lowest power value is 13.83 W at 16:00 WIB with an intensity value of 47301 lux. Charging a battery with a capacity of 12V / 35A from a minimum voltage to full using a 100 wp solar panel takes an average of 4 hours 28 minutes. The use of a battery with a capacity of 12V / 35A from full to minimal voltage conditions to drive an AC water pump takes an average of 1 hour 48 minutes and produces an average water volume of 1855.33 liters. Or the resulting average water discharge is 17.08 liters / minute.
KAJIAN EKSPERIMENTAL ALAT PENGERING SURYA TIPE KABINET DENGAN RAK BERGETAR
Authors: LA ODE MOHAMMAD FIRMAN  , Maulana Eka
Published: May 2023

Pada umumnya,  perlakuan dengan cara pengadukan secara manual digunakan agar kontak antara udara dengan permukaan produk yang sedang dikeringkan dapat berlangsung dengan baik. Biasanya kehilangan panas sering terjadi pada pengering komoditi pertanian termasuk pengering surya ghe tipe kabinet. permasalahan ini dapat diatasi dengan melakukan penelitian tentang alat pengering surya tipe kabinet dengan rak bergetar. Tujuan umum penelitian ini adalah merancang bangun dan melakukan simulasi pada pengering surya GHE tipe kabinet dengan rak bergetar guna mengetahui besarnya getaran dan proses perpindahan panas pada  pengeringan komoditi kacang mete. Prototipe alat pengering surya yang digunakan memiliki panjang 1 m, lebar 1 m, tinggi 1 m dengan kapasitas pengeringan berupa kacang mete sebesar 40 kg. Sumber panas yang digunakan berasal dari energi surya dan bahan bakar batubara. Komponen penggetar diletakkan di bawah rak pengering dan saat dilakukan percobaan diperoleh bahwa gerakan efektif terjadi pada saat kecepatan sudut putar mendekati kecepatan sudut alamiah dan menghasilkan percepatan getaran sebesar, A = 2.3 m/det2 serta amplitudo getaran sebesar X = 2.88 mm pada massa total 40 kg. Penurunan kadar air kacang mete menggunakan getaran bisa mencapai 3.5 % sedangkan tanpa getaran hanya mencapai 4.2 %. Penggunaan sumber panas dari energi surya hanya menyebabkan temperatur udara dalam ruang pengering berada di bawah 60 oC, sehingga diperlukan penambahan panas yang dapat diperoleh dari pembakaran bahan bakar batubara. Peningkatan temperatur udara dalam ruang pengering dapat tercapai bila panas yang keluar dari alat penukar kalor sebesar qAPK = 23.3 kJ/s.
Modifikasi Bentuk Mata Bor Untuk Efisiensi Proses Pembuatan Lubang Baut
Authors: Hasim Wahid , Suhadi Amin
Published: May 2023

Untuk memenuhi jumlah permintaan produksi yang meningkat dan permintaan waktu proses yang lebih cepat pada proses pembuatan lubang baut pada komponen flange companion, maka digunakan metode dan alat potong yang tepat untuk memenuhi permintaan tersebut. Dalam praktiknya, penerapan elemen alat potong/cutting, sangat berpengaruh pada kualitas dan kuantitas produk. Tujuan dari penelitian ini adalah untuk menghemat waktu proses dan biaya pembelian mata bor dalam proses produksi flange companion, serta membandingkan proses dengan mata bor lama dengan yang baru dengan memperhatikan pengaruh-pengaruh perubahan desain mata bor, parameter mesin terhadap proses produksi, serta hasil produksi. Metode yang digunakan dalam penelitian ini, dengan memperbaiki kualitas produk dan proses dalam waktu yang bersamaan, sehingga bisa menekan biaya dan sumber daya seminimal mungkin, serta mengetahui kondisi optimal dari parameter pemesinan dan mengetahui performansi dari parameter pemesinan. Hasil modifikasi mata bor untuk proses pembuatan lubang baut waktu proses produksi berkurang serta bottle neck berkurang. Mata bor yang digunakan dengan parameter pemesinan spindle speed ( n ) : 1675, feed ( f ) : 0.048, depth of cut ( H ) : 12.5, dan cutting condition : coolant. Untuk kecepatan potong ( Vc ) : 62.21 m/menit, kecepatan pemakanan vf : 80.4 mm/menit, dan waktu pemotongan ( T ) : 0.176 menit ( 1 lubang ). Waktu proses produksi berkurang dari ± 1.97 menit menjadi ± 1.4 menit. Terdapat cost reduction ( cost/pcs ) Rp 2,804 , cost reduction per bulan Rp 13,815,308 , cost reduction per tahun Rp 165,783,696, sehingga biaya pembelian mata bor berkurang dibanding dengan mata bor yang lama sebesar 77.78 %.