bluuebunny/crossref_metadata_2025_split huggingface dataset:
RELATIVISTIC CALCULATIONS OF MAGNETORESONSONIC PARAMETERS IN STRUCTURAL STUDIES OF ELEMENTENTORGANIC COMPOUNDS
Authors: Krivdin Leonid 
Published: March 2020

Systematic structural studies were carried out in a wide range of nitrogen, silicon,
phosphorus, selenium, and organophosphorus compounds by quantum-chemical calculations of a
high level of isotropic absolute magnetic-shielding constants (chemical shifts) and spin-spin interaction
constants involving 1H, 13C, 15N, 19F, 29Si, 31P, 77Se and 125Te in comparison with the
experiment. The analysis of the factors determining the accuracy of the quantum chemical calculation
of the discussed magnetoresonance parameters including the level of the theory and the quality of the
basis set, the influence of the medium, vibrational corrections, and relativistic effects are analyzed.
ON THE REPLACE ABILITY OF SOLVENT IN THE PROCESS OF LOW TEMPERATURE DE-WAXING OF OILS
Authors: Raskulova Tat'yana , Fereferov Mihail , Kurbatova Marina , Cherencova Mariya , Polyak Irina 
Published: March 2020

The replace ability of traditional complex solvent (toluene – methyl ethyl ketone) for low
temperature de-waxing with an individual methyl isobutyl ketone is considered.
DEAERATION AS A METHOD OF CORROSIVE GASES REMOVAL FROM THE WATER ON HEAT ELECTRIC STANTION
Authors: Serebryakov Mihail , Russavskaya Natal'ya 
Published: March 2020

The characteristic of methods of removal of corrosion-active gases from the water
on heat electric station by the method of deaeration is considered. The using of vacuum-deaerators is
discussed.
THE VAPOR RECOVERY OF BENZENE IN THE CATALYST PREPARATION PROCESS FOR BENZENES ALKYLATION
Authors: Ul'yanov Boris , Raskulova Tat'yana , Fereferov Mihail 
Published: March 2020

The vapor recovery of benzene from off-gas of the catalyst preparation unit by
absorption with polyalkylbenzenes is considered. The scheme of the process is developed, the design
is offered and the principal absorber’s dimension for the vapor recovery of benzene are determined.
Hereditary Semiorders and Enumeration of Semiorders by Dimension
Authors: Keller Mitchel T. , Young Stephen J. 
Published: March 2020

In 2010, Bousquet-Mélou et al. defined sequences of nonnegative integers called ascent sequences and showed that the ascent sequences of length $n$ are in one-to-one correspondence with the interval orders, i.e., the posets not containing the poset $\mathbf{2}+\mathbf{2}$. Through the use of generating functions, this provided an answer to the longstanding open question of enumerating the (unlabeled) interval orders. A semiorder is an interval order having a representation in which all intervals have the same length. In terms of forbidden subposets, the semiorders exclude $\mathbf{2}+\mathbf{2}$ and $\mathbf{1}+\mathbf{3}$. The number of unlabeled semiorders on $n$ points has long been known to be the $n$th Catalan number. However, describing the ascent sequences that correspond to the semiorders under the bijection of Bousquet-Mélou et al. has proved difficult. In this paper, we discuss a major part of the difficulty in this area: the ascent sequence corresponding to a semiorder may have an initial subsequence that corresponds to an interval order that is not a semiorder.
We define the hereditary semiorders to be those corresponding to an ascent sequence for which every initial subsequence also corresponds to a semiorder. We provide a structural result that characterizes the hereditary semiorders and use this characterization to determine the ordinary generating function for hereditary semiorders. We also use our characterization of hereditary semiorders and the characterization of semiorders of dimension $3$ given by Rabinovitch to provide a structural description of the semiorders of dimension at most $2$. From this description, we are able to determine the ordinary generating function for the semiorders of dimension at most $2$.
Stability for Maximal Independent Sets
Authors: Kahn Jeff , Park Jinyoung 
Published: March 2020

Answering questions of Y. Rabinovich, we prove "stability" versions of upper bounds on maximal independent set counts in graphs under various restrictions. Roughly these say that being close to the maximum implies existence of a large induced matching or triangle matching (depending on assumptions).
A mild strengthening of one of these results is a key ingredient in a proof (to appear elsewhere) of a conjecture of L. Ilinca and the first author giving asymptotics for the number of maximal independent sets in the graph of the Hamming cube.
Constructions for the Elekes–Szabó and Elekes–Rónyai problems
Authors: Makhul Mehdi , Roche-Newton Oliver , Warren Audie , De Zeeuw Frank 
Published: March 2020

We give a construction of a non-degenerate polynomial $F\in \mathbb R[x,y,z]$ and a set $A$ of cardinality $n$ such that $F$ vanishes on $\Omega(n^{3/2})$ points of $A \times A \times A$, thus providing a new lower bound construction for the Elekes–Szabó problem. We also give a related construction for the Elekes–Rónyai problem restricted to a subgraph. This consists of a polynomial $f\in \mathbb R[x,y]$ that is not additive or multiplicative, a set $A$ of size $n$, and a subset $P\subset A\times A$ of size $\Omega(n^{3/2})$ on which $f$ takes only $n$ distinct values.
Lozenge Tilings of Hexagons with Central Holes and Dents
Authors: Lai Tri 
Published: March 2020

Ciucu proved a simple product formula for the tiling number of a hexagon in which a chain of equilateral triangles of alternating orientations, called a `fern', has been removed from the center (Adv. Math. 2017). In this paper, we present a multi-parameter generalization of this work by giving an explicit tiling enumeration for a hexagon with three ferns removed, besides the central fern as in Ciucu's region, we remove two new ferns from two sides of the hexagon. Our result also implies a new `dual' of MacMahon's classical formula of boxed plane partitions, corresponding to the exterior of the union of three disjoint concave polygons obtained by turning 120 degrees after drawing each side.
Projections of Antichains
Authors: Janzer Barnabás 
Published: March 2020

A subset $A$ of $\mathbb{Z}^n$ is called a weak antichain if it does not contain two elements $x$ and $y$ satisfying $x_i<y_i$ for all $i$. Engel, Mitsis, Pelekis and Reiher showed that for any weak antichain $A$, the sum of the sizes of its $(n-1)$-dimensional projections must be at least as large as its size $|A|$. They asked what the smallest possible value of the gap between these two quantities is in terms of $|A|$. We answer this question by giving an explicit weak antichain attaining this minimum for each possible value of $|A|$. In particular, we show that sets of the form $$A_N=\{x\in\mathbb{Z}^n: 0\leq x_j\leq N-1 \textrm{ for all $j$ and } x_i=0\textrm{ for some $i$}\}$$ minimise the gap among weak antichains of size $|A_N|$.
Caracterización del manejo en el ordeño de sistemas doble propósito del distrito de Los Santos
Authors: Ríos Leonel 
Published: March 2020

Trabajo de investigación de tesis de Licenciatura en Ingeniería en Producción Animal de la USMA. Ríos L. 2015
El objetivo del estudio fue caracterizar el manejo del ordeño en fincas doble propósito del distrito de Los Santos. Se recolectó información a partir de una muestra probabilística de 46 productores, a través de encuestas semiestructuradas y observación directa, durante el periodo marzo-junio 2014. La información comprendió aspectos socio-económicos, características de las fincas y del manejo al ordeño. Los datos se analizaron empleando estadísticas descriptivas. Se determinó que 72% de los productores no lavan la ubre de la vaca al momento del ordeño. La mayoría apoya a sus vacas con ternero, un 7% utilizan inyección (oxitocina) para el apoyo. El 89% realizan el secado de la ubre al momento del ordeño, pero con prácticas inadecuadas, como el secado de los pezones con el rabo de la vaca. La infraestructura para el ordeño consiste en galera con piso para el 35% de los productores, 33% disponen de galera pero sin piso, y 33% ordeñan en el corral. El 80% realiza la higiene de utensilios utilizados después del ordeño (coladeras, garrafones, cubos, pezoneras y paños de limpieza). El 96% limpian los garrafones de leche todos los días. El 35% indicaron tener problemas de mastitis, relacionada princi-palmente al ordeño mecanizado. Se concluye que los productores mostraron inadecuadas prácticas de manejo tanto en la higiene de la ubre como en el tipo de infraestructura, situación que puede llegar a comprometer la calidad del producto y la productividad de su hato.
Efecto de las nuevas tecnologías de la información y comunicación (TICs) en la agilidad mental de las personas de las personas mayores. Estudio Piloto
Authors: Solís Abdel 
Published: March 2020

Trabajo de investigación realizado en el marco del Programa de Jóvenes Científicos organizado por el SENACYT y presentado en la Feria
Científica Juvenil, noviembre 2015. Obtuvo el tercer lugar en la categoría “Ciencias Sociales y el Comportamiento”.
El auge de las Nuevas Tecnologías de las Comunicación (TICs) es una realidad de la que Panamá no escapa. Su uso es un reto al que deben adaptarse las personas de todos los grupos etarios. Estudios previos han demostrado que la tecnología puede ayudar a las personas a manejar o a evitar la depresión, disminuyendo el sentimiento de soledad. Esta investigación buscaba conocer qué beneficios tiene el uso de las TICs en la actividad cognitiva, en un grupo de 51 personas mayores de 50 años. Se aplicó una encuesta de uso de tecnología y la Prueba de Trazo, partes A y B, con el fin de medir la velocidad de procesamiento y la flexibilidad mental. Los resultados aportan evidencia de un efecto positivo en la agilidad mental de aquellas personas que usan las nuevas tecnologías y perciben las TICs como beneficiosas y recomendables.
Intención emprendedora en estudiantes universitarios de Ingeniería Industrial Administrativa de la Universidad Católica Santa María la Antigua (USMA).
Authors: Vásquez Samuel 
Published: March 2020

Abordar los motivos que tienen los individuos para optar por el emprendimiento es relevante, ya que se puede ofrecer una aproximación que permita entender cómo se convierte uno en un emprendedor y, más aun, en un emprendedor exitoso. Este conocimiento es aplicable a la formación de emprendedores, tarea para la cual debe ayudarse a los estudiantes a responder cuestiones tales como: el grado en que se siente atraído para convertirse en empresario (conveniencia percibida), el grado en que se consideran personalmente capaz para ser empresarios (viabilidad percibida), si los valores o creencias que conforman la cultura incentivan o no el emprendimiento como opción de vida. El presente estudio ofrece una perspectiva sobre la intención emprendedora en estudiantes de primer ingreso y alumnos graduandos de Ingeniería Industrial Administrativa de la Universidad Católica Santa María la Antigua (USMA). El objetivo es evaluar la intención emprendedora y la percepción emprendedora sobre algu-nos elementos que inciden en la intención emprendedora de estos estudiantes, con el fin de explorar diferencias entre los grupos. Se aplicó un instrumento construido con base en la escala de autoeficacia y la encuesta del Global Entrepreneurship Monitor. Los resultados demuestran que los estudiantes de cuarto año tienen un mayor nivel de autoeficacia emprendedora, mientras que los de primero muestran mejores actitudes hacia el emprendimiento.
Analisis Proyeksi Laporan Keuangan Perusahaan Penerbangan Saat Transisi PSAK 30 Menjadi PSAK 73
Authors: Laksana Mahardika Putra , Sudradjat Sudradjat 
Published: March 2020

The aim of this research is to anticipate the emergence of a new regulation in accounting studies. Especially the emergence of PSAK 73 that will succeed PSAK 30 in terms of Leasing. This research gives the projection if a new regulation is in effect. PSAK 73 changes the form of double accounting system into a single one, meaning that lease is not being classified and calculated with two methods like capital lease and operating lease. It’s using capital lease calculation with it being classified as right of use asset. Asset is being recognized and depreciation expense follows after with interest. The result of this research shows that, the trantition of PSAK 30 to PSAK 73 affects entity’s income statement. Entity’s expenses increase because of the additional interest and depreciation expense. Assets also increase resulting in management asset ratio and profitability ratio to fall.

Keywords: PSAK 30, PSAK 73, Transition, Asset of Use
Analisis Penerapan Pengakuan Pendapatan Kontrak Konstruksi Berdasarkan PSAK 34
Authors: Subagja Riki , Pradipto Didit 
Published: March 2020

This study aims to analyze the implementation of contract revenue recognition based on PSAK 34. The problem that is often faced by companies that are particularly engaged in the field of construction services in the recognition of income is the method of revenue recognition what should be used or applied, because there are differences in recognition between the one method with others. Especially if a project is done is more than a year or the so-called Long-term project. In addition, the presentation of financial statements of income recognition in each accounting period must be reported in accordance with generally accepted Accounting Standards (PSAK No. 34 concerning Construction Contracts). There is only one method used or applied that is the percentage completion method. The percentage method recognizes income with two approaches, based on physical progress and cost-to-cost. PT X as a construction service company uses the percentage of completion method with a physical progress approach (Physical progress) in the recognition of his opinion for both long-term contract and short-term contract. The results of this study conclude that the accounting treatment of the application of revenue recognition of construction services by using the percentage of completion method with physical progress approach on PT X is in conformity with the accounting standards set in PSAK No. 34. However, when compared to revenue recognition using the percentage of completion method with a cost-to-cost approach the firm can recognize the revenue and expenses more to illustrate or show a more proportional calculation because it corresponds to the costs incurred or poured out.

Keywords: revenue recognition, expense recognition, PSAK no. 34
The PROBLEMATIC INTERNET USE AMONG HEALTHCARE PROFESSIONALS: EMERGING BEHAVIORAL PATTERNS IN SOCIAL NETWORKING SITES ADDICTION
Authors: Sohail Marium , Haris Rauf  , Tayyeba Iftikhar Mirza  , Rabia Ashfaq  , Anbreen Aziz  , Hasan Ibrahim  
Published: March 2020

ABSTRACT:
BACKGROUND & OBJECTIVE: Internet has swayed all aspects of human society and the exponential rise in global internet users indicates that internet & Social Networking sites (SNS) have become an essential part of the daily lives of people with potentially addictive eﬀects of its overuse. This may lead to social isolation, depression & professional eﬀects. This behavioral addictive pattern has also been observed in increasing trend among healthcare professionals worldwide. This study aims to assess prevalence of internet addiction and its behavioral patterns (BP) in Pakistani healthcare context, to determine the prevalence and intensity of Internet Addiction (IA) among Medical Doctors.
METHODOLOGY: A Quantitative; Cross-sectional Survey was conducted at Shaikh Khalifa Bin Zayed/ Azad Kashmir Combined Military Hospital Rawalakot for 2 months.After calculating sample size with 95% Conﬁdence Interval limit,100 medical and dental doctors were selected using convenience sampling. After IRB approval & informed consent data was collected using prevalidated “Young's Internet Addiction Scale”& “Behavioral Patterns scale”. The participants recorded their response on a 5-point Likert scale and dichotomous scale for each scale respectively. Data was summarized using descriptive statistics & inferential statistics in SPSS 23. Addiction was classiﬁed into 4 categories. The signiﬁcant association between IA groups and BP groups was computed by Fisher's exact test with P-value <0.05 as signiﬁcant.
RESULTS: The Response rate was 87% with 54% males and 56% females. The prevalence of internet addiction was 79%(n=69). Out of them 36% (n=31) had mild, 41% (n=36) had moderate addiction while 2% (n=2) had severe addiction. Pattern of internet addiction symptomatology shows that prevalence of IA is higher in excessive use (87.35%) & lack of control (77.01%) while least in anticipation (35.63%) category. Statistically signiﬁcant diﬀerence was seen in behavioral patterns among addicted and nonaddicted medical and dental doctors.
CONCLUSION: Internet Addiction is a recognizable disorder from the spectrum of Problematic Internet Use. This study reports the prevalence of internet addiction among health care professionals and burden of multiple behavioral patterns in association with IA, which is an emerging mental health concern.
Study of protective properties of butyrylcholinesterase in acute anticholinesterase poisoning on BChE-KO and BALB/c mice
Authors: Palikov Viktor A. , Palikova Yuliya A. , Dyachenko Igor A. 
Published: March 2020

Introduction: The article presents the results of studying the protective properties of recombinant human butyrylcho­linesterase (rhBChE) in a model of acute anticholinesterase poisoning in mice knocked out for the BChE gene. Balb/c inbred mice were also used to demonstrate the important role of BChE.
Materials and methods: In the study, BChE-ko and Balb/c mice were used. An organophosphorus compound (OPC) paraoxon was used as a toxic agent causing acute anticholinesterase poisoning. rhBChE was used as an antidote for OPC poisoning. To obtain rhBChE, an expression system based on CHO cell lines was chosen. In order to suppress BChE in Balb/c mice, a carboxyl esterase blocker cresylbenzodioxaphosphorin oxide (CBDP) was used. Two parame­ters were used to study the recovery after toxicity modeling: the end time of the animal tremor and the distance covered in open-field for 3 minutes.
Results and discussion: The acute poisoning model using the CBDP blocker showed that the sensitivity of Balb/c mice increased significantly. The use of rhBChE against the background of CBDP allowed achieving 100% survival of animals with the minimum lethal dose of paraoxon. Knockout mice are expected to be more sensitive to the toxin, and the use of a biological trap in the form of rhBChE made it possible for 70% of the animals to survive with the minimum lethal dose of paraoxon. Besides, the use of rhBChE facilitated reducing the recovery time after OPC poisoning.
Conclusion: The results of the study showed that the use of rhBChE as a protective agent in acute OPC poisoning significantly increased the survival of the animals and reduced the clinical manifestations of poisoning.
Applications of multilevel modeling in psychological science: Intensive repeated measures designs
Authors: Nezlek John B. , Mroziński Błażej 
Published: March 2020

Le modèle multiniveau (MLM) est une technique statistique qui peut être utilisée pour analyser les données collectées dans différents types de recherche. Bien que l’utilisation et la demande de MLM aient considérablement augmenté au cours de la dernière décennie, l’enseignement du MLM n’a pas suivi le rythme de cette évolution. Le présent article fournit une introduction au MLM qui est destinée à aider les chercheurs à effectuer des analyses MLM et à en décrire les résultats, mais aussi à les aider à comprendre les résultats des analyses MLM présentées dans les articles. Compte tenu des limites inhérentes à un seul article, nous ne couvrons pas tous les sujets en profondeur. Néanmoins, nous fournissons suffisamment d’informations pour que les lecteurs soient en mesure de conduire et de comprendre les analyses MLM. Des exemples de différents types d’analyses de données de type « journal intime » (parfois appelées mesures répétées intensives), une méthode de recueil de plus en plus utilisée, sont présentés et des séries de données avec des exemples concrets sont fournies dans le matériel supplémentaire en ligne. Des recommandations sont également données concernant les meilleures pratiques pour effectuer les analyses et pour rendre compte des résultats.
L’interprétation symbolique des réseaux sociaux d’entreprise comme un frein à leur adoption au sein d’un groupe bancaire français
Authors: Karoui Myriam 
Published: March 2020

Les technologies collaboratives de type réseau social d’entreprise (RSE) sont largement en adéquation avec les spécificités majeures des environnements de communication et de travail maîtrisés dans la sphère privée (mail, plateformes de collaboration, wikis, blogs…). Elles symbolisent de fait des représentations et des valeurs que les acteurs peuvent juger comme étant incompatibles ou en contradiction avec les valeurs culturelles de leur organisation. De fait, l’objet de notre recherche est de comprendre dans quelles mesures la symbolique véhiculée par un outil RSE (en termes d’images et de valeurs) peut inhiber et empêcher son adoption dans un milieu organisationnel. En nous basant sur le concept de « conflict-IT culture » et à travers une étude de cas mené au sein d’un groupe bancaire français, nous avons cherché à comprendre la portée symbolique de ces technologies RSE et son impact sur leur adoption à partir des perceptions des acteurs.
Transformation du symbolique pour l’appropriation d’un ERP
Authors: Mawadia Anass , Eggrickx Ariel , Chapellier Philippe 
Published: March 2020

Malgré la recherche montrant la nature transformationnelle d’un Enterprise Resource Planning (ERP), les éditeurs et intégrateurs tendent à imposer une meilleure façon de faire : ERP standard basé sur les best practices , approche top-down , mise en place en mode « Vanille ». Ces pratiques véhiculent différents mythes : le « mythe du standard », du « leadership de l’informaticien », ou encore de la résistance à éradiquer. Les utilisateurs peuvent interpréter ces pratiques comme un « symbole », un moyen de leur imposer de nouvelles méthodes de travail éloignées de leurs pratiques locales, ce qui provoque de la résistance et des conflits conduisant souvent à une faible appropriation de l’ERP, voire même à un échec. Les travaux d’Hirschheim et Newman sur la symbolique des systèmes d’information (SI) sont peu mobilisés dans la littérature ERP et plus généralement SI, alors que leur concept de symbolique habilitante ouvre des perspectives pour favoriser l’appropriation d’un ERP. La recherche action menée pendant deux ans dans un groupe européen de petites filiales, par l’un des chercheurs, chef de projet ERP, constitue une opportunité pour tenter de combler ce vide ou gap théorique. Les résultats contribuent à approfondir les différents véhicules de refonte (dispositifs) nécessaires pour évoluer vers une symbolique habilitante et favoriser l’appropriation de l’ERP. La recherche met aussi en exergue des conditions peu identifiées dans la littérature pour la transformation de la symbolique, comme l’autonomie encadrée, et le rôle d’acteur-frontière du chef de projet.