bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Covering Threshold of a Directed Acyclic Graph by Directed Acyclic Subgraphs
Authors: Yuster Raphael 
Published: December 2022

Let $H$ be a directed acyclic graph (dag) that is not a rooted star. It is known that there are constants $c=c(H)$ and $C=C(H)$ such that the following holds for $D_n$, the complete directed graph on $n$ vertices. There is a set of at most $C\log n$ directed acyclic subgraphs of $D_n$ that covers every $H$-copy of $D_n$, while every set of at most $c\log n$ directed acyclic subgraphs of $D_n$ does not cover all $H$-copies. Here this dichotomy is considerably strengthened.
Let ${\vec G}(n,p)$ denote the probability space of all directed graphs with $n$ vertices and with edge probability $p$. The fractional arboricity of $H$ is $a(H) = max \{\frac{|E(H')|}{|V(H')|-1}\}$, where the maximum is over all non-singleton subgraphs of $H$. If $a(H) = \frac{|E(H)|}{|V(H)|-1}$ then $H$ is totally balanced. Complete graphs, complete multipartite graphs, cycles, trees, and, in fact, almost all graphs, are totally balanced. It is proven that:

Let $H$ be a dag with $h$ vertices and $m$ edges which is not a rooted star. For every $a^* > a(H)$ there exists $c^* = c^*(a^*,H) > 0$ such a.a.s. $G \sim {\vec G}(n,n^{-1/a^*})$ has the property that every set $X$ of at most $c^*\log n$ directed acyclic subgraphs of $G$ does not cover all $H$-copies of $G$. Moreover, there exists $s(H) = m/2 + O(m^{4/5}h^{1/5})$ such that the following stronger assertion holds for any such $X$: there is an $H$-copy in $G$ that has no more than $s(H)$ of its edges covered by each element of $X$.
If $H$ is totally balanced then for every $0 < a^* < a(H)$, a.a.s. $G \sim {\vec G}(n,n^{-1/a^*})$ has a single directed acyclic subgraph that covers all its $H$-copies.

As for the first result, note that if $h=o(m)$ then $s(H)=(1+o_m(1))m/2$ is about half of the edges of $H$. In fact, for infinitely many $H$ it holds that $s(H)=m/2$, optimally. As for the second result, the requirement that $H$ is totally balanced cannot, generally, be relaxed.
Role of Aminated Derivatives of Natural Gum in Release Modulating Matrix System of Losartan Potassium
Authors: Kalbhare Shankar , Pawar Rohit K , Redasani Vivekkumar K. , Yadav Amita B , Mohite Vishal R , Kadam Vaibhav B 
Published: December 2022

Objective: The investigation aimed to synthesize amino derivatives of various natural gums like Xanthan gum and Tamarind gum for using them as a release modulating polymer in the formulation of the hydrophilic matrix system of losartan potassium and to find the best amongst them. Developing oral sustained release matrix tablets for a drug with a constant release rate has always been a challenge to the pharmaceutical technologist.
Materials and Methods: Release modulating hydrophilic matrix tablets of losartan potassium were prepared by wet granulation method. A total number of 6 formulations of release modulating hydrophilic matrix tablets of losartan potassium were prepared using different polymeric ratios of Carbopol 934, aminated Tamarind gum and aminated Xanthan gum based on preliminary trial bathes. The formulated tablets were evaluated for both pre-compression and post-compression evaluation studies.
Results: Based on in vitro drug release study the effective formulations AXG 3 are shows a maximum similar release profile to other remains formulations with a theoretical drug release profile of losartan potassium for sustained release. Finally optimized formulation AXG 3 containing carbopol 934 (60 mg), aminated xanthan gum (40 mg), MCC (190 mg) and magnesium stearate (10 mg) showed 100±0.024 % drug release in 12 hr which is acceptable with theoretical drug release of losartan potassium for sustain release dose. Conclusion: Aminated derivatives of xanthan gum and Tamarind gum extend the drug release for 12 hr. Based on in vitro drug release studies of formulations, we concluded that the alteration in the concentration of carbopol 934 with an aminated derivative of xanthan gum in sustain release formulation development was more effective and economical.
PENGENALAN TEKNOLOGI BLOCKCHAIN DAN PERKEMBANGANNYA BAGI MASA DEPAN
Authors: Irawan Bambang , Juman Kundang Karsono , Tjahjono Budi 
Published: December 2022

Pengabdian Kepada Masyarakat (PkM) ini bertujuan untuk memaparkan isu-isu tentang Teknologi Blockchain dan perkembangannya di masa depan pada masyarakat luas serta seluruh mahasiswa-mahasiswi Universitas Persada Indonesia YAI dan Universitas Esa unggul pada khususnya. Pelaksanaan kegiatan pengabdian masyarakat berbentuk seminar yang dilakukan secara Daring. Metode yang digunakan berupa Ceramah dan sesi tanya jawab. Alat yang digunakan adalah ZOOM. Pelaksanaan berlangsung dalam empat tahap yaitu Persiapan materi, pra-aktivasi, pelaksanaan, dan pelaporan PKM. Outcome yang diharapkan dari PkM ini adalah peserta Mengenal lebih jauh tentang perkembangan teknologi blockchain serta implementasinya di berbagai bidang, terutama di era Industri generasi ke-4. Ada banyak startup yang mendigitalisasikan perusahaan berdasarkan teknologi baru yang disebut blockchain. Ini adalah teknologi terdistribusi dan peer-to-peer. Cryptocurrency adalah salah satu produk dari teknologi ini. Pada titik ini, cryptocurrency telah menjadi sarana barter. Kegiatan PkM ini diikuti oleh 115 peserta baik dari kalangan umum maupun mahasiswa serta beberapa orang dosen Universitas Esa unggul dan Universitas Persada Indonesia YAI.
ANALYSIS OF THE ACTIVITY AND PRACTICAL APPLICATION OF FIRE AND RESCUE GROUNDS
Authors: Вагенлейтнер Евгений Владимирович , Симанов Станислав Евгеньевич , Попов Сергей Вениаминович , Щеняев Василий Иванович 
Published: December 2022

Проведен анализ отечественного и зарубежного опыта использования полигонов для подготовки личного состава пожарных и аварийно-спасательных подразделений, а также проведения испытаний пожарно-спасательной техники. Обращено внимание на то, что на законодательном уровне отсутствуют структурированные технические требования к необходимой инфраструктуре исследуемых объектов. Для решения проблемы предлагается подготовить и ввести в действие нормативный документ, который устанавливал бы требования к метрологическому обеспечению, аттестации и паспортизации полигонов с учетом климатических условий эксплуатации техники, применения технологий.
The state policy of the Russian Federation in the field of fire safety is aimed, among other things, at improving the scientific and experimental, educational and material base of scientific and educational organizations, forensic expert institutions. In the structures of these organizations and institutions there are grounds used for training staff of fire and rescue units, conducting various tests for fire and rescue equipment. The practice of staff training in the field of fire safety and emergency rescue operations at corporate grounds, characterized by the specifics of the activities of these organizations, is also known. In the work, a similar experience of using training grounds in foreign training centers was studied. For the most part, grounds are used for the following: education and training of emergency rescue and fire units staff, as well as the population; various types of exercises of fire and rescue units staff; conducting tests and control of fire-technical weapons, fire and rescue equipment; testing and control of products for compliance with fire safety requirements; scientific research in the field of fire safety and protection of the population from emergency situations. Despite the widespread use of grounds in the structure of EMERCOM of Russia, various rescue services, there are currently no structured technical requirements at the legislative level for the list of necessary infrastructure of the objects under study. To solve the problem, it is proposed to prepare and put into effect a regulatory document establishing requirements for metrological support, attestation and certification of grounds, taking into account the climatic conditions of the operation of equipment and technologies.
Comparison of mechanical and microstructure properties of tungsten alloys for special purposes
Authors: Imamović Aida , Žuna Šaban , Mulaosmanović Ensar , Alibašić Zijad , Kosec Borut 
Published: December 2022

Tungsten belongs to group of refractory metal that possess extraordinary resistance to heat and wear and it is the heaviest engineering material. Because of its properties tungsten is used for special purposes.
This paper presents the results of mechanical and microstructure research on the example of the characteristic heavy tungsten alloys 91W-6Ni-1.8Fe-1Co and 93W-5Ni-1.6Fe-0.3Co with different Ni/Co ratios.
The proper Ni/Co ratio is important to obtain a favorable microstructure and mechanical properties of these materials. The distribution of the W, Ni, Co and Fe elements in tungsten phase and binder phase, which can influence on mechanical properties of tungsten alloys.
The SEM analysis and mechanical results show that the alloy, which has Ni/Co within the given limits, posses a finer microstructure and better mechanical properties that is very important for the maintenance of the quality of tungsten alloys for special purposes.
Quality audit in Education
Authors: Kufi Endalew Fufa 
Published: December 2022

This research dealt with the conformity of practices in internal audits and reviews on education quality to the requirements of quality enhancement culture. Descriptive survey design of research was used. Data were collected from 38 university instructors in Arsi University and 12 directors from different universities in Ethiopia. A binary mode of questionnaire and semi-structured interview were used in collecting data. The findings denoted that, there was no considerable gap in understanding the concepts of quality and quality audits among instructors and directors. But, huge gap was observed in assuming roles and contributing for quality audits, which could be bases for quality enhancement. With regard to coverage, emphasis was given to academic works than research and community-services. Opportunities were also very rare for bottom-up reflection. Audits were worked on to conform to requirements from higher offices, not largely to be used as resources to improve existing practices.
LE CAPITAL HUMAIN, UN ENJEU DE L’AMELIORATION DURABLE DU CLIMAT DES AFFAIRES
Authors: MBARKI Mohamed Amine , BAKOUR Chafik , LHALOUI Fatima Ezzahra 
Published: December 2022

Les enjeux contemporains de l’amélioration durable du climat des affaires ne sont plus exclusivement une question d’infrastructures et d’équipements. Les stratégies mises en œuvre par de nombreux pays se penchent sur le rôle des personnes, de leurs compétences et de leur capacité à innover. L’économie de la connaissance est souvent la dénomination générique adoptée pour désigner cette évolution. La prise en compte du capital humain dans l'analyse économique a constitué une avancée importante d’autant que son accumulation est un facteur essentiel de croissance économique. En effet, la diffusion des connaissances permet des rendements croissants et génère des externalités positives.
C’est dans ce sens qu’une assise historique qui retrace de la genèse du concept du climat d’investissement et son évolution sera évoquée pour éclaircir les problématiques actuelles. Cette contribution se propose ensuite d’examiner le rôle du capital humain dans la croissance et le développement des économies à travers une exploration du concept et ses différentes approches théoriques. Les difficultés de valorisation du capital humain seront abordées en troisième lieu, en mettant l’accent sur les méthodes et les limites des approches traditionnelles de sa mesure et l’intérêt que présentent des solutions méthodologiques alternatives comme le modèle socio-économique. Nous soulignons que ces difficultés ont une origine méthodologique, en constatant qu’il n’y a pas, aujourd’hui, de méthodologie adaptée de mesure du capital humain qui fasse consensus et qui soit aisément actionnable dans les entreprises. Enfin, cette contribution se propose d’examiner le capital humain comme facteur central du climat des affaires dans la mesure où son intégration à l’économie de la connaissance est un enjeu majeur de l’assainissement du climat d’investissement. Cette contribution fait appel à des idées et des réflexions issues de la revue de littérature.
A VLA Light Curve Spanning 43.8 yr for the Compact Symmetric Object OQ 208
Authors: Wrobel J. M. , Sjouwerman L. O. 
Published: December 2022

Abstract
Compact symmetric objects are young, jetted active galactic nuclei defined in part by their slow radio continuum variability. Radio light curves spanning decades can help characterize their evolutionary trends. Here, we present a preliminary VLA light curve at 1.465 GHz for the compact symmetric object OQ 208, a frequently observed calibrator. The light curve spans 43.8 yr, or about 17% of OQ 208's estimated age. The light curve shows two distinct steady levels separated by a decade-long rise at a rate of about 1% yr−1, corresponding to a cumulative increase of about 12% in flux density.
Cartographier les sociologies critiques : définitions, justifications et modèles critiques
Authors: Renault Emmanuel 
Published: December 2022

Cet article se propose de mettre en perspective les débats actuels en distinguant tout d’abord deux types de critiques de la sociologie critique : celles qui opposent sociologies critiques et non critiques, et celles qui relèvent de controverses internes à la sociologie critique. Dans l’une et l’autre de ces types de controverses, l’idée de sociologie est entendue en un sens réducteur. Il semble utile de souligner la diversité des définitions, des justifications et des modèles critiques propres aux différentes formes possibles de la sociologie critique. La première section de l’article porte sur la question de la définition, la deuxième sur celle des justifications, et la troisième sur celle des effets critiques.
Penser l’imprévisibilité dans les dispositifs des formations ouvertes et à distance
Authors: Papadopoulou Melpomeni 
Published: December 2022

L’arrivée de nouvelles technologies dans le champ de la formation d’adultes influence de façon importante les pratiques d’enseignement et d’apprentissage. Notre contribution interroge la place qu’occupe l’imprévisibilité, intrinsèque aux situations de formation d’adultes, dans le cadre des FOAD. Comment penser les rapports entre contraintes techniques et libertés d’action, entre didactique des contenus et aléas de vie, et enfin, entre programmation et improvisation ? La relation interdépendante entre d’une part les gestes professionnels et d’autre part les environnements techniques flexibles est mise en avant pour permettre la prise en compte de l’imprévisibilité des situations d’enseignement et d’apprentissage.
Adaptations et ajustements des gestes professionnels pendant la pandémie chez les enseignants en IUT
Authors: Messaoui Anita , Redondo Cécile 
Published: December 2022

Notre étude analyse les postures et les gestes professionnels d’enseignants d’un institut universitaire de technologie lors du passage des enseignements à distance pendant la pandémie de Covid-19. L’analyse des pratiques professionnelles s’articule autour des notions du multi-agenda de l’agir enseignant, d’ajustement et de genèse instrumentale, à partir d’un corpus constitué par cinq entretiens avec des enseignantes et des échanges textuels sur la plateforme Discord. Face à l’obligation d’un enseignement distant médié par le numérique, les postures d’étayage, de contrôle et d’accompagnement ont été favorisées. Les ajustements sont également visibles dans les processus d’appropriation de la plateforme Discord.
Bilateral Breast Cancer—Its clinicopathological profile and management
Authors: Mishra Subhasis , Sable Mukund , Das Majumdar Saroj K. , Mishra Pritinanda , Muduly Dilip K. , Parida Dillip Kumar 
Published: December 2022

Background:
Bilateral breast carcinoma (BBC), though not rare, is quite an uncommon clinical situation and hence guidelines regarding its diagnosis and management are not clear enough. It can be synchronous or metachronous depending on the interval between the time of presentation in bilateral breasts.

Materials and Methods:
We retrospectively reviewed our experience with 18 cases of bilateral breast malignancies presented and treated between January 2014 and December 2019. We analyzed clinical, pathological, and immunohistochemical profiles with their management. All the patients were staged separately for both breasts and received treatment according to prescribed guidelines.

Results:
Among these 18 cases, 16 were synchronous and 2 were metachronous during the presentation. During the presentation of synchronous malignancies, eight patients had stage IV disease, whereas the other eight cases were nonmetastatic. Patients received combined modality treatment by surgery, chemotherapy, and radiotherapy depending on the stage of presentation. At a median follow-up period of 12 months, 10 (55.56%) patients were disease free, 2 (11.11%) patients had disease recurrence, and 5 (27.78%) patients succumbed to the disease, whereas 1 patient has lost follow-up.

Conclusion:
Diagnosis and management of bilateral breast malignancies pose a clinical challenge to the oncologist and hence should be vigilantly looked upon. The treatment decision is individualized according to the stage and molecular type of the particular patient. Regular follow-up and judicious use of clinical breast examination and mammography can help in the early detection of second breast carcinoma.
Severe Acute Respiratory Syndrome Coronavirus 2 Omicron Variant and Psychological Distress Among Frontline Nurses in a Major COVID-19 Center
Authors: Dahiya Hanita , Goswami Harshita , Bhati Chanchal , Yadav Ekta , Bhanupriya  , Tripathi Divya , Rani Deepa , Deepika  , Pal Gayatri , Saini Geeta , Yadav Lalita , Kumar Rajesh 
Published: December 2022

Background:
Coronavirus outbreak severely affected the psychological health of frontline health-care workers, including nurses. Nurses relatively face many more psychological problems compared to other health-care workers. This study aimed to assess nurses' fear, stress, and anxiety status during the Omicron, a new variant of the severe acute respiratory syndrome coronavirus 2, outbreak in India.

Materials and Methods:
This questionnaire survey included 350 frontline nurses working at a tertiary care teaching hospital in North India. The information was collected using the Coronavirus Anxiety Scale, Impact of Event Scale-Revised, and Fear of COVID-19 Scale. Nurses working in the hospital since COVID-19 outbreak were included in the study. Appropriate descriptive and inferential statistics were applied to compute the results.

Results:
Nurses hospitalized after contracting an infection (odds ratio [OR] – 3.492, 95% confidence interval – 1.644–9.442, P < 0.002) and attended training on COVID-19 (OR – 2.644, 95% CI – 1.191–5.870, P < 0.017) reported high distress than their counterparts. Likewise, nurses hospitalized after contracting an infection (β = 3.862, P < 0.001 vs. β = 2.179, P < 0.001) and have no training exposure on COVID-19 management and care (β = 2.536, P = 0.001 vs. β = 0.670, P = 0.039) reported higher fear and anxiety, respectively. Likewise, married participants (β = 1.438, P < 0.036) who lost their friends and colleagues in the pandemic (β = 0.986, P = 0.020) reported being more frightened and anxious.

Conclusions:
Participants reported experiencing psychological burdens, especially nurses hospitalized after contracting an infection and who lost their friends and colleagues to COVID-19. High psychological distress may be a potential indicator of future psychiatric morbidity. Authors recommend a variant-specific training to improve nurses' mental health to combat the pandemic.
Documentación de procesos para mejora en control interno, en un departamento de empresa pública.
Authors: Moncayo Rodriguez Lizette , Moncayo Rodriguez Mtra.  Lizette Marcela 
Published: December 2022

La empresa pública tiene como función brindar bienes y servicios de primera necesidad a la población, donde la participación del gobierno es mayorista o en su totalidad, es por ello que en la práctica el estado tiene el control sobre la administración de dicha organización. Es así que la presente investigación busca documentar procesos para mejora en el control interno previo a una auditoria de un departamento de empresa pública, donde se proponen formatos para documentar los pasos a seguir en el ordenamiento de carpetas de expedientes y un mejor control de manejo de las mismas, esto debido a la valoración de necesidades que se realizó después de los resultados de auditoria que presento dicho departamento, donde se percibió la falta de control en los expedientes.
Redes sociales como medio de trabajo profesional en los jóvenes del siglo XXI (Social
Authors: López Ramírez Edgar , Borboa Álvarez Edith Patricia , Limón Ulloa Roberto 
Published: December 2022

Las redes sociales hoy en día han pasado de no solo ser una de las principales herramientas de comunicación, sino que también se pueden generar ingresos mediante la publicación de contenido digital y promoción de productos y servicios. Muchas personas han apostado a dedicarse a trabajar en plataformas sociales descartando el trabajo dirigido por personas con autoridad superior, lo que llama la atención de cientos de jóvenes alrededor del mundo, y en Guaymas, Sonora, no es la excepción.

El presente estudio se lleva a cabo para la obtención de información acerca de los jóvenes residentes de Guaymas, Sonora, México, que hoy en día, sin importar a qué generación pertenecen, tanto Millennials como generación Z y la más reciente generación T, hagan uso de redes sociales como forma de dependencia económica, dejando de lado la forma tradicional de trabajar.

Se desarrolló un instrumento de medición para conocer el uso de diversas plataformas que los jóvenes de Guaymas, Sonora, utilizan ya sea para fines sociales, o para promocionar algún producto o servicio, y cual o cuales serían las más importantes para el crecimiento de negocios, mediante el uso de encuestas, siendo enviada a la población deseada a encuestar, mediante el manejo de correo electrónico y de plataformas de mensajería para la recolección de datos.

Al cierre de esta investigación, se hallaron diversos datos sobre qué contenido realizar, cual plataforma utilizar, así como los motivos por los que la juventud de hoy en día se dedicaría por completo a trabajar mediante uso de redes sociales.
Markteting Digital y su influencia en las Pymes aplicado en una empresa de vidrios y aluminios en Huatabampo, Sonora
Authors: Corral Morales Emma 
Published: December 2022

RESUMEN
Este trabajo de investigación trata de explicar como la nueva era digital, en estos tiempos, ha incrementado diferentes formas de implementar marketing en los distintos modelos de negocio; es por esta razón, que la base fundamental en esta investigación es con el fin de crear una estrategia de Marketing digital para algunas Pymes de Huatabampo, dado que por su naturaleza y condiciones económicas no poseen conocimientos de estos entornos digitales y que de manera gratuita, puedan obtener mejor reconocimiento en el mundo online. Por consiguiente, al crear esta estrategia se tomó como caso de estudio a 20 microempresas que se han mantenido en el mercado con el objetivo de conocer sus propias estrategias para incrementar sus ventas, sus ganancias y como las llevan a cabo.