bluuebunny/crossref_metadata_2025 huggingface dataset:
IMPACT OF SUCTION SPACE LEAKS ON THE DISCHARGE PRESSURE PULSATION OF POSITIVE DISPLACEMENT PUMP
Authors: Rabsztyn Dominik , Klarecki Klaudiusz
Published: October 2023

This paper presents the results of the experiments related to measuring the impact of the suction space leaks in the gear pump on the pressure pulsation, resulting in the aeration of hydraulic fluid. The research authors claim that it is possible to detect leaks in the suction line, causing aeration of the hydraulic fluid, by recording and analyzing the pressure pulsation in the positive displacement pump discharge line. The measurements were performed for six leakage values, five discharge pressure settings and under constant hydraulic fluid temperature. The obtained results were analyzed in the time and frequency domains. The results of experimental research confirmed the author’s thesis.
Geogrid as an effective reinforcement of natural airfield pavements
Authors: Kowalewska Agata , Wesołowski Mariusz , Kłysz Sylwester
Published: October 2023

The load-bearing capacity of natural airfield pavements is crucial for air operations safety. Taking into account the insufficient load-bearing capacity of natural airfield pavements, which is confirmed by the conducted tests in this field, the article presents a tangible impact of the application of geocells (geogrids) as an efficient way of their reinforcement with particular emphasis on the improvement of their load-bearing capacity. The recovery time of airfield operational capability compared to the currently applied reinforcement methods of natural pavements, such as mechanical or chemical surface stabilization or surface replacement, was showcased.
Assessment of the technical condition of the airport runway surface using an UAV
Authors: Żebrowski Marcin
Published: October 2023

The technical condition of airport pavements not only has a significant impact on the performance of air operations in the ground movement area but also affects the comfort of aircraft movement on the airport pavement, which determines the safety of air operations. The requirements for airfield pavements are specified in defense standards, as well as in civil documents, e.g. (International Civil Aviation Organization), EASA (European Union Aviation Safety Agency), FAA (Federal Aviation Administration), where exploitation parameters in the field of airport pavement construction are defined. The article presents the methodology of the initial assessment of the technical condition of airport pavements in terms of existing damage, as well as anomalies of the existing gradeline, which may indicate inadequate evenness of the pavement. The assessment was made using an aerial photogrammetry kit and the test results were presented. This work focuses on the use of an aerial photogrammetry set, which made a flight over the runway of a military airport providing its full imaging.
Status of milk quality at farmers field
Authors: SINGH VIKRAM , GUPTA JANCY
Published: October 2023

The study was conducted on the clean milk production (CMP), to analyze the milk quality from producer to processing plant in cooperative system. To fulfill the objectives, a plan of work was prepared; under which 4 milk unions of Rajasthan Cooperative Dairy Federation (RCDF) were selected, viz. Alwar, Bhilwara, Bikaner and Hanumangarh. To analyze the milk quality, samples were collected from 3 levels of milk collection, viz. pail (farmer), Dairy Cooperative Society (DCS) and dock (district level) in cooperative system and tested at respective unions’ laboratory. The study revealed that as per ISO standards milk unions stands at ‘Very Good’ at pail, ‘Good’ at DCS and ‘Fair’ at dock level, respectively. Lack of incentives on CMP was perceived as very serious constraint by all the farmers.
Micro-satellite based diversity estimation of Local hill fowl (Uttara fowl): A unique poultry strain of Uttarakhand
Authors: PHANGCHOPI DONNA , KAUR NAVNEET , KUMAR SHIVE , SINGH LAKSHYA VEER , SOMVANSHI S. P.S. , SINGH BALVIR
Published: October 2023

Nainital and Pithoragarh districts of Uttarakhand in Himalayan region have 2 types of poultry populations. Uttara fowl is reared under backyard system. But no information is available in the literature of Uttara fowl. The aim of the study was to analyze the genetic diversity in Local hill fowl of Uttarakhand (Uttara Fowl) using panel of micro-satellite markers recommended by FAO. The 50 blood samples were collected from randomly selected Uttara fowl. A total of 25 micro-satellite loci were used for this study. All the analyzed 25 loci were polymorphic and a total of 158 alleles were observed in the present study of Uttara Fowl. The observed and expected heterozygosity ranged from 0.292 (LEI-155) to 0.729 (LEI-90) and from 0.414 (MCW–250) to 0.838 (MCW-228) in Uttara fowl, respectively. Wright’s fixation index (Fis) values among loci ranged from –0.085 (for LEI-90) to 0.747(MCW-84). The mean Fis for 25 microsatellite loci was estimated 0.168. Deviation from Hardy-Weinberg equilibrium was observed in Uttara fowl in the commercial cross. The overall population heterozygote deficiency was 0.168. The existence of sufficient genetic diversity within Local hill fowls, estimated through molecular markers analysis would further aid in a conservation scheme, enabling the planning of new strategies for the improvement of in situ conservation schemes.
Induced breeding of threatened Indian medium carp Puntius pulchellus
Authors: SRIDHAR N , RAGHUNATH M R , HEMAPRASANTH K P , RAGHAVENDRA C H , EKNATH A E
Published: October 2023

The reproductive biology of the Indian Medium Carp (Puntius pulchellus) was studied and induced breeding of the fish accomplished. Males were dark and exhibited pinkish red prominent tubercles on the snout in contrast to the plain snouted females which however, had a deep pink lateral band. The gonado somatic index observed in females indicated a prolonged spawning period. The fish was successfully induced bred for the first time using a preparation consisting of Salmon Gonadotropin Releasing Hormone Analogue. and Domperidone (0.5ml/kg body weight) followed by pituitary extract @ of 8mg/kg and 2mg/kg for females and males respectively. The larvae appeared (hatching) after 48 h with a heavily laden yolk sac which was absorbed completely after 8days. The embryonic and larval developments are discussed.
A Review of Indoor Positioning System Solutions for Industrial Applications to Analyze its Selection Criteria for a Given Application
Authors: Das Subhayan , Das Anirban
Published: October 2023

Indoor Positioning Systems (IPS) have caught popular attention in recent years as a result of their capacity to provide location-based services in interior locations where GPS signals are unable to provide meaningful information. However, with a plethora of IPS technologies available, selecting a fitting solution for a specific application can be a daunting task. The objective of this paper is to conduct a comparative analysis of the various forms of indoor positioning systems, such as Wi-Fi fingerprinting, Bluetooth low energy (BLE) beacons, ultrasonic, infrared, and magnetic-based systems based on their accuracy, reliability, deployment cost, scalability, and power consumption. The results show that the choice of IPS technology depends on the application requirements, with no single solution outperforming the others in all aspects. Based on this, a selection procedure has been devised to select the most appropriate IPS technology.
An Opinion Mining-Based Pretrained Model Analysis Depending on Multiple Thinking Patterns
Authors: Choudhury Joydhriti , Farabe Abdullah Al , Habib Adria Binte , Hossain Muhammad Iqbal
Published: October 2023

People love to express their opinions online, and the use of social media for this purpose has skyrocketed in the Internet age. Customers also frequently share their first-hand knowledge of the goods or services they have used. Reviews can be either favorable or bad, and both have an impact on people's decisions and businesses. Therefore, it is essential to predict people's opinions in order to preserve and understand the reliability of online review systems. Our study concentrates on a certain kind of model, namely an opinion mining-based pre-trained model, and its analysis takes different types of thought patterns into account. Pretrained models based on transformers, such as BERT, RoBERTa, and DistilBERT may be effective at classifying people's opinions. Other classifiers, such as DISTILBERT and RoBERTa, offer more accuracy compared to the rest of the classifiers employed by researchers but in our model, RoBERTa offers the best accuracy at 90%.
Coase, Schumpeter y las bases pro monopólicas de la estrategia managerial
Authors: Mas Fernando Francisco
Published: October 2023

El origen del ímpetu monopólico en el discurso managerial de esta época, orientado según el principio de competitividad, debe rastrearse genealógicamente en las lecturas que se derivan de los trabajos de dos economistas de principios del siglo XX: Ronald Coase y Joseph Schumpeter. Este artículo recurre a una crítica socio-historia de las principales teorías microeconómicas del siglo pasado para explicar la actual justificación ética del monopolio en el campo del management estratégico. Con esto se busca ampliar y completar el estudio foucaultiano de la microeconomía neoliberal como racionalidad, aquella que hace de la competencia su principio central reflexivo. Desde mediados del siglo pasado una serie de acontecimientos y reformulaciones en el campo teórico de la economía y el management dieron lugar al principio de la competitividad estratégica de las empresas, que tomó distancia del principio de la competencia económica de los mercados. Así, a diferencia de la competencia del neoliberalismo temprano estudiado por Michel Foucault a fines de los años 1970, la competitividad estará fundamentada por la microeconomía tardía y el management estratégico que emergió en la década de 1980. Estas teorías son más afines con el fenómeno monopólico que con la competencia perfecta, cuyas bases se remontan a una relectura de los aportes coasianos y schumpeterianos en esta dirección.
Eş‘arî Nedensellik Anlayışının Yeniden Formüle Edilmesi -Şekil-Muhteva, Küllî-Cüz’i ayrımı-
Authors: BAYSAL Erkan
Published: October 2023

İslam düşünce tarihinde tartışılan en önemli konulardan biri nedenselliktir. Bu konu birçok açıdan Allah-âlem ilişkisini ilgilendirmektedir. Bu yüzden bir filozof ve kelamcının nedensellik hakkındaki kanaati, onun ulûhiyete dair kanaatlerini de ortaya koymaktadır. Farklı İslâmî ekoller arasında nedensellikle ilgili tartışmalar meydana geldiği halde bu konuda en sert tartışmalar âdet anlayışını savunan kelamcılar ile ontolojik nedenselliği savunan Meşşâîler arasında meydana gelmiştir. Bu alandaki çalışmalarla ilgili en önemli problemlerden biri nedenselliğin farklı türlerinin karıştırılmasıdır. Bunun sonucunda Allah’ın varlığını imkân, hudûs ve nizam delilleri ekseninde temellendiren Eş‘arîler, mutlak olarak nedensellik karşıtı olarak algılanmışlardır. Böyle bir yaklaşım Allah’ın varlığına dair bütün argümanları ortadan kaldırmaktadır. Aynı zamanda onların öncüllerden hâsıl olan her sonucu mutlak olarak âdete dayalı şeklinde gördüklerini ileri sürmek de doğru değildir. Bu karışıklığın bir nedeni bizzat Eş‘arî kaynakların bu konudaki muğlak ifadeleridir. Bu gerekçelerden dolayı nedensellikle ilgili tartışmaların aklî zeminini, felsefî ve kelâmî okulların düşünce sistemlerini esas alarak nedenselliğin aklî, teolojik, ontolojik ve epistemolojik şeklinde tasnif edilmesi, özellikle epistemolojik nedensellik konusunda şekil-muhteva küllî-cüz’î ayrımlarının yapılması gereklilik arz etmektedir.
DETERMINANTS OF FAMILY TAKAFUL IN ASEAN: EVIDENCE FROM BUSINESS UNIT SHARÔ‘ÓH AND FULL-FLEDGED OPERATIONS
Authors: NUN MAZIYYAH MAHSYAR  , HAKAN ASLAN
Published: October 2023

This study’s aim is to perform an empirical analysis of the determinants that influence the solvency of family takaful enterprises, both at the full-fledged level and within the business unit of SharÊ‘ah compliant entities across countries in ASEAN. The data utilised within the study were obtained from the financial statements annually of 32 family takaful businesses and the World Bank Database, spanning 2017 to 2021. The solvency of an entity is assessed by utilising net assets divided by net contributions, which serve as the dependent variable in this context. According to the findings, a positive relationship exists between solvency and the following variables: profitability, investment ratio, liquidity, and firm size. The impact of wakalah fees on solvency is significantly related negatively. Nevertheless, it is essential to note that there is no inherent connection between GDP and inflation concerning solvency. The family takaful company in ASEAN has a relatively high solvency level. Thus, it can fulfil its obligation in the long run to meet the policyholder’s claim.
Trends in the Incidence of Oral and Oropharyngeal Cancer in Southwest Iran from 2014 to 2019
Authors: Rahmanian Koushkaki Alireza , Jahangirnezhad Mahmoud , Cheraghi Maria
Published: October 2023

Background: Oral and oropharyngeal cancer is known as one of the few lethal oral diseases with a great burden associated with a high cost of treatment and rehabilitation, life-long impairments, and a nearly 50% mortality rate; therefore, it should be considered an increasingly severe health and social problem in the world due to its increased incidence. This makes the burden of oral and oropharyngeal cancer very high, with a hefty economic burden. Objectives: The current study was designed and conducted to investigate epidemiological features of oral and oropharyngeal cancer in the Khuzestan province of Iran. Methods: This cross-sectional study was conducted with raw data on cancer incidence obtained from the Khuzestan cancer registry as a subsequent of the Iranian population-based national cancer registry from 2014 to 2019. Recorded cases were standardized by ICD-10 and ICD-O-3 classifications and categorized by gender, age group, diagnosis, etc. The method of diagnosis in this study consisted of four categories. Descriptive data for the frequency and rate of each variable and analyses of associations between variables were conducted using the chi-squared test with a statistical significance of P < 0.05. Results: A total of 941 valid cases were identified in the study period, with a composition of males 675 cases and females 266 cases in total. More than 85% of reported cases were submitted to a database with pathologic reports, verifying a high data validity level. The crude rate in female cases had an upward trend in contrast to the crude rate in males, which shows a downward trend. Squamous cell carcinoma was the most diagnosed malignancy, with 532 cases (55%). Conclusions: The data on oral and oropharyngeal cancer in Khuzestan suggest that the overall incidence of the disease increased, particularly in females and younger age groups in the study period. Concerning increasing trends and the presence of most oral and oropharyngeal cancer cases in the active and young members of society of Khuzestan province of Iran, an extensive program for screening, prevention, and rehabilitation should be prioritized.
Modelling pathological effects in intracellular calcium dynamics leading to atrial fibrillation
Authors:   , Marchena Angos Miquel
Published: October 2023

The heart beating is produced by the synchronization of the cardiac cells' contraction. A dysregulation in this mechanism may produce episodes of abnormal heart contraction. The origin of these abnormalities often lies at the subcellular level where calcium is the most important ion that controls the cell contraction. The regulation of calcium concentration is determined by the ryanodine receptors (RyR), the calcium channels that connect the cytosol and the sarcoplasmic reticulum. RyRs open and close stochastically with calcium-dependent rates. The fundamental calcium release event is known as calcium spark, which refers to a local release of calcium through one or more RyRs. Thus, a deep knowledge on both the spatio-temporal characteristics of the calcium patterns and the role of the RyRs is crucial to understand the transition between healthy to unhealthy cells. The aim of this Thesis has been to figure out these changes at the submicron scale, which may induce the transition to Atrial Fibrillation (AF) in advanced stages. To address this issue, I have developed, and validated, a subcellular mathematical model of an atrial myocyte which includes the electro-physiological currents as well as the fundamental intracellular structures. The high resolution of the model has allowed me to study the spatio-temporal calcium features that arise from both the cell stimulation and the resting conditions. Simulations show the relevance of the assembly of RyRs into clusters, leading to the formation of macro-sparks for heterogeneous distributions. These macro-sparks may produce ectopic beats under pathophysiological conditions. The incorporation of RyR-modulators into the model produces a nonuniform spatial distribution of calcium sparks, a situation observed during AF. In this sense, calsequestrin (CSQ) has emerged as a key calcium buffer that modifies the calcium handling. The lack of CSQ produces an increase in the spark frequency and, during calcium overload, it also promotes the appearance of global calcium oscillations. Finally, I have also characterized the effect of detubulation, a common issue in cells with AF and heart failure. Thus, the present work represents a step forward in the understanding of the mechanisms leading to AF, with the development of computational models that, in the future, can be used to complement in vitro or in vivo studies, helping find therapeutic targets for this disease.
Non-local dynamics and intermittency in non-homogeneous flows
Authors:   , Ben Mahjoub Otman
Published: October 2023

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La tesi analitza les dinàmiques no locals i la intermitència en fluids no homogenis i no isotròpics tant en experiments de laboratori com en dades geogràfiques. Després de l'estudi sobre els models que descriuen la intermitència en fluids homogenis i isotròpics, presentem un model per fluids no homogenis i no isotropics. El model es basa en l'anàlisi de la jerarquia de transmissió d'energia. S'utilitza la tècnica de la Extended Self Similarity amb l'objectiu d'estudiar l'escala de lleis de les funcions estructurals de velocitat. Els resultats experimentals de tres tipus de fluids que s'han comparat amb el model per fluids no homogenis i no isotròpics són els següents: turbulència generada per un cilindre en un canal de vent i turbulència generada per una reixa i per un jet en un canal d'aigua. S'analitza la turbulència geogràfica del Delta de l'Ebre i del Knebel Vig i els resultats són comparats amb els del model anteriorment esmentat. La contribució principal és el descobriment d'un paràmetre aparentment relacionat amb la jerarquia de transmissió d'energia en el rang inercial que juga un paper clau en la comprensió de les dinàmiques dels fluids no homogenis.

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The thesis analyze the non-local dynamics and intermittency in non-homogeneous and non-isotropic flows both in the laboratory experiments and geophysical data. After a review on models describing intermittency in homogeneous and isotropic flows, a different model for non-homogeneous and non-isotropic flows is introduced. A model is based on the analysis of the energy transfer hierarchy. The technique of Extended Self Similarity is used to study the scaling laws of the velocity structure functions. Experimental results of three type of flows cylinder wake turbulence in wind tunnel, grid and jet turbulence in water channel are presented and compared with the model. The geophysical turbulence in the Ebro Delta and Knebel Vig are analyzed and the results are compared with the model. The important contribution is the discovery of a new apparently parameter related to the energy transfer hierarchy in the inertial range which plays a key role in the understanding of the dynamics of the non-homogeneous flows.
Estudi de l'3He bidimensional amb mètodes de Monte Carlo quàntics
Authors:   , Grau Torre-Marín Victor
Published: October 2023

de la tesi
En aquest treball es presenta un estudi de l'3He a temperatura zero combinant les tècniques de Monte Carlo variacional (VMC) i la difusiva (DMC) amb nodes fixos (FN) i relaxació dels nodes (RN).
L'estudi comença amb una presentació de les característiques de l'heli i una revisió històrica tant del seu estudi com de les tècniques de Monte Carlo.
La primera part del treball exposa en detall els mètodes de càlcul emprats. Es fa un repàs dels mètodes variacional i difusiu així com de l'aplicació de condicions periòdiques de contorn i de la tècnica emprada per a calcular estimadors purs. Es proposa un càlcul de les cues que proporciona un valor final de l'energia molt proper a la del sistema vertaderament infinit. Això permet obtenir resultats numèrics pràcticament independents del nombre de partícules emprades en la simulació. A més, amb l'ús de la tècnica combinada FN-RN, es te una mesura de la proximitat al resultat exacte del valor FN trobat.
L'estudi variacional de l'3He tridimensional ocupa la segona part de la tesi. En ella s'analitza la influència sobre l'energia de cadascun dels mecanismes de correlació emprats, i es comparen amb altres resultats ja existents a la literatura. En destaca l'optimització de la funció de backflow, que condueix a uns resultats clarament millors. Es presenta també una anàlisi VMC en la que es valora la introducció de nous mecanismes de correlació a la funció d'ona, mostrant que la introducció de correccions d'ordre superior al backflow són irrellevants. Els resultats d'aquesta part, fàcilment comparables amb dades experimentals, serveixen com a banc de prova per als programes que seran adaptats després al sistema bidimensional.
La tercera part del treball s'ocupa del sistema d'3He bidimensional infinit en absència de qualsevol substrat de suport. Amb el mètode DMC es calcula l'equació d'estat del sistema a polarització variable, i s'avaluen els efectes que té en cadascun d'ells les interaccions de backflow. Els resultats mostren que el sistema no posseeix cap estat auto-lligat. Es calcula després el sistema a polarització variable i se'n analitzen algunes propietats físiques. Els valors obtinguts de la susceptibilitat magnètica apunten l'existència d'una transició de fase magnètica a polaritzacions de l'orde del 50%.
Inestabilidades térmicas e hidrodinámicas ligadas a rupturas de simetría en cavidades anulares
Authors:   , Pino González David
Published: October 2023

En esta tesis se estudia, mediante simulación numérica directa de las ecuaciones de Navier-Stokes, la dinámica de un fluido en el interior de un anillo cilíndrico en rotación con las tapas ligeramente inclinadas y sometido a un gradiente de temperatura y una gravedad en dirección radial. En el presente trabajo se ha introducido la curvatura de las paredes de forma natural mediante la resolución de las ecuaciones en coordenadas cilíndricas. Se han considerado condiciones de contorno de adherencia en las paredes laterales y esfuerzos cortantes nulos en las tapas del anillo. Si la rotación es suficientemente elevada es conocido que la dinámica se desarrolla en planos perpendiculares al eje de rotación, en forma de ondas que precesionan en el sentido de la rotación, llamadas ondas térmicas de Rossby.

Se ha estudiado la dinámica en función de la rotación, la razón de radios del anillo, del número de Prandtl. El análisis de estabilidad lineal del estado conductivo indica que el inicio de la convección depende fuertemente de una característica del fluido como es el número de Prandtl. Si este parámetro es moderado o elevado las inestabilidades térmicas son dominantes y se han encontrado dos familias de modos dominantes. Se han obtenido modos en los que la convección se desarrolla principalmente cerca del pared interior y están inclinados en el sentido de la rotación (espirales); y modos prácticamente rectos, en los que la convección se desarrolla en toda la capa (normales). Para bajos números de Prandtl todos los modos dominantes son del segundo tipo.

Mediante técnicas de continuación se han analizado las soluciones no lineales relacionadas con los dos tipos de modos existentes para el caso más interesante de los estudiados. Esto es cuando el número de Prandtl es 0.7. Las soluciones obtenidas se han comparado con las encontradas en el caso de capa plana. También se ha analizado la estabilidad lineal de estas soluciones mediante una técnica de Floquet. Se ha obtenido que independientemente del tipo de modo lineal del que provengan las soluciones no lineales presentan una bifurcación subarmónica si los parámetros están cercanos a un cambio de familia de modo.

Por último, se han calculado las soluciones que bifurcan de las anteriores integrando las ecuaciones de Navier-Stokes, de continuidad y de conservación de la energía mediante una evolución temporal de las variables primitivas principalmente para número de Prandtl 0.7. Para una razón de radios fija y tres valores de la rotación diferentes. Dependiendo de sí la solución primaria proviene de un modo normal o no, la bifurcación afecta de manera diferente al transporte de calor de la solución secundaria. Se han obtenido para los casos estudiados dos tipos de convección, "vacilatoria" y en forma de doble columna
Bifurcaciones, transición al caos y turbulencia en sistemas heterogéneos
Authors:   , Rodríguez Cantalapiedra Inma
Published: October 2023

Este trabajo está dividido en dos partes claramente diferenciadas, ambas dentro de la Física no lineal.
La primera es un estudio de las inestabilidades de la corriente en semiconductores extrinsecos, incluyendo antooscilaciones y caos con perdida de coherencia espacial, mientras que la segunda es un estudio de los mecanismos productores de mezcla turbulenta, en particulas la mezcla producida en un fluido heterogéneo por una líniea de burbujas.
En el primer estudio, los atractores responsables de los fenómenos obervados tienen pocos grados de libertad efectivos, mientras que en segundo estudio se refiere a turbulencia desarrollada, con muchos grados de libertad.
Respuesta extrínseca y comportamiento no lineal en materiales cerámicos piezoeléctricos
Authors:   , Ochoa Guerrero Diego A.
Published: October 2023

The study of the elastic, dielectric and piezoelectric non-linear behavior in PZT-based and KNN-based piezoelectric ceramics represent the main goal of this work. Both systems present a perovskite-like structure. Several experimental set-ups were designed, mounted and automated to be used in this study.
First, the elastic non-linear response, in resonance, is measured. The purpose is to study the variation of the elastic coefficient of the material when it is submitted to high stress. A model is formulated based on the variation of the coefficients due to the increase in amplitude of the high stress applied. The correspondence between the model and the experimental observations is verified. The results show a good agreement in soft PZT case but not in hard PZT, confirming that is not possible to assume a non-linear -like dependence for hard PZT coefficients.
Secondly, we take a view of the dielectric, piezoelectric and elastic response over the temperature. The purpose of the study is to evaluate the contribution of the extrinsic effect to piezoceramics response. Anomalous behavior of the macroscopic properties of the hard PZT
around the Room Temperature is observed. A preliminary model is proposed to explain such behavior. The contribution of the extrinsic effect to the macroscopic properties in a KNN compound is evaluated and the results suggest that the anomaly observed around Room Temperature would be associated, in this case, with the presence of a structural transition between two ferroelectric phases.
Temperature dependent non-linear dielectric response is also observed. The study was carried out by measuring the dielectric permittivity at low frequencies and at high applied electric fields in a temperature range from 20K till 400K. The results have been analyzed using the Rayleigh model. The change in the hard PZT dynamic walls is shown and explained through an intuitive model. The results obtained in the KNN system display a soft PZT like behavior at Room Temperature. Nevertheless, the anomaly observed in the dielectric proper ties around Room Temperature was associated to the above mentioned structural transition between two ferroelectric phases.
Finally, temperature dependent mechanical non-linear response in soft PZT ceramics is studied. The variations of the coefficients with the stress and with the temperature are studied and the similarities between the linear and non-linear regime are assessed. It is observed that the change of the extrinsic contribution with the temperature is qualitatively similar that the variation observed by the application of the high mechanical stress, thus indicating that the effect is due to a common phenomenon.
Creating Shared Value in Upstream Oil and Gas Company and Community: A Case Study of CSR Implementation in PT Pertamina EP Tarakan Field
Authors: Kurniawan Isrianto , Nurlaela Arief Neneng
Published: October 2023

This research examines a Creating Shared Value (CSV) practice trough CSR implementation in upstream oil and gas company and how it corresponds to sustainability. In a year of 2020, saw a notable natural declined in energy resources as a result of Tarakan Field production performance. This faced numerous economic and social challenge, including a responsibility to support holding company commitment to manage energy resilience as well as contribute to SDGs. This research, which incorporates information from literature analysis, in-depth interviews and company reports, shows that Tarakan Field’s CSR implementations were a useful strategy for generating shared value for business, stakeholders, and communities in line with sustainability. It makes an argument for the relationship between CSR implementation and sustainability, as well as the implementation plan and CSV measurement through CSR implementation in Tarakan Field. These concerns are particularly evident in the vague of CSV measurement which made it inefficient for the company to meet its commitment by unintegrated CSR and operation activities in spite of company strategy.
Diálogo entre geografia e música: os gêneros rap e reggae na construção do conhecimento geográfico
Authors: Silva Glaycon de Souza Andrade e , Rocha Deborah Cristina da , Silva Gleyber Eustáquio Calaça , Castilho Luís Otávio Rocha , Cruz Ewerton Ferreira
Published: October 2023

A geografia é o saber que propicia compreender e analisar o mundo em que se vive, portanto, para abstrair e consolidar os conhecimentos, deve-se associá-lo ao cotidiano em sociedade incorporando os conceitos à vivência dos discentes. Sendo assim, o presente artigo tem por objetivo analisar o emprego de músicas para o desenvolvimento de temáticas e competências da Geografia com alunos da educação básica de uma escola estadual localizada na cidade de Belo Horizonte, compreendendo como os mesmos constroem uma visão crítica acerca da sociedade contemporânea. A metodologia pautou-se na análise das atividades aplicadas junto aos alunos do ensino médio, regular e EJA, as quais se fundamentam nas habilidades de leitura, escrita e interpretação de letras de músicas dos gêneros Rap e Reggae que abordam temáticas do capitalismo e da globalização. Após a aplicação das atividades, os resultados analisados demonstraram que os alunos souberam desenvolver a capacidade analítica, o senso crítico e o diálogo entre arte musical e geografia por meio de redações que abordavam as mazelas e benesses do capitalismo e, além disso, os distintos impactos da globalização em países centrais e periféricos.
A garantia do direito à Educação do Campo na Amazônia Paraense a partir do PRONERA: resistência e desafios do curso de Geografia da Terra das Águas e das Florestas
Authors: Brito Márcia Mariana Bittencourt , Oliveira Neto Adolfo , Cardoso Marcos Cardoso
Published: October 2023

O artigo é resultado da pesquisa qualitativa desenvolvida com estudantes do Programa Nacional de Educação na Reforma Agrária – PRONERA – do curso de Geografia da Terra, das Águas e das Florestas “Ulisses Manaças”, no âmbito de estudos pós-doutorais. Analisa-se a repercussão da referida política pública como direito à educação e ao território e seus principais desafios frente ao extermínio do Programa no Governo Bolsonaro. A metodologia utilizada para levantar o perfil dos educandos, a recriação dos territórios camponeses na Amazônia e a repercussão da formação dos educandos deu-se a partir de análise bibliométrica, de pesquisa qualitativa, de questionário semiestruturado e de rodas de conversa. Conclui-se que o curso do PRONERA, a partir dos princípios da Educação do Campo, sobretudo, com a garantia da alternância, possibilita a resistência dos estudantes em seus territórios, com consciência de classe e do modelo de produção em defesa da agroecologia e da agricultura familiar e elevando o nível de consciência contra  a destruição do meio ambiente e do agronegócio que avança sobre a região amazônica provocando a organização dos estudantes em defesa de seus territórios e de sua própria sobrevivência.
Pomiar i analiza preferencji wyrażonych z wykorzystaniem pakietu conjoint programu R
Authors: Pełka Marcin , Rybicka Aneta
Published: October 2023

Conjoint analysis is a statistical method in which consumer preferences are decomposed in order to evaluate: utility function for each attribute, importance of each attribute, market shares simulations and segmentation of consumers. There are many different computer programs that can be applied for conjoint analysis research. The paper presents conjoint package of R software which are useful to evaluate empirical preferences. The R program is more and more popular and many researchers are applying it. The conjoint package of R software is a response to a fact, that not all steps of conjoint analysis were programmed in R. In particular it concerns evaluation of attributes’ importance, market share simulations and interpretation of results. The article presents also results of the evaluation of wine consumers’ preferences with application of conjoint package, market share simulations and segmentation of consumers.
Przedział ufności profile likelihood dla prawdopodobieństwa sukcesu w modelu regresji logistycznej Firtha
Authors: Fijorek Kamil
Published: October 2023

In the first part of the paper the results of the simulation study, comparing the coverage properties of Wald’s and the profile likelihood confidence intervals for the probability of a success in the Firth’s logistic regression, are described. The efficient algorithm for computing profile likelihood confidence intervals is proposed. In the second part of the paper the theoretical results are applied to the bankruptcy model.
Struktura terminowa stóp procentowych w Polsce – estymacja i identyfikacja kształtujących ją czynników
Authors: Kiedrowska Agnieszka
Published: October 2023

The aim of the article was to estimate the term structure of interest rates in Poland, as well as to identify factors affecting its shape, which is essential in effective interest rate risk management. The approximation of the yield curve presented in the article shows a significant segmentation of the debt securities market into markets of short-term and long-term instruments. The principal component analysis of the term structure of interest rates made it possible to separate out risk factors. The results obtained indicate that the volatility of the term structure of interest rates in Poland can be explained by only three principal components related to the level, the steepness and the curvature of the yield curve, which values confirm the observed market segmentation.
2D QSAR STUDY OF FUSED 5,6-BICYCLIC HETEROCYCLES AS ANTI ALZHEIMER’S AGENTS USING TOPOLOGICAL PARAMETERS
Authors:   Department of Chemistry, K.S. Saket P.G. College, Ayodhya, U.P., India, e-mail: pandit543sanjay@gmail.com, MISRA S.K , SINGH PRITI ,   Department of Chemistry, K.S. Saket P.G. College, Ayodhya, U.P., India, SINGH R.K. ,   Department of Chemistry, M.L.K. P.G. College, Balrampur, U.P., India, SRIVASTAV G.K ,   Department of Chemistry, Shri Lal Bahadur Shastri Degree College, Gonda, U.P., India
Published: October 2023

Alzheimer’s disease (AD) is a degrading and irreversible neurodegenerative disorder associated with loss of brain functions. It is manifested clinically into psychological symptoms that collectively form cognitive dysfunction and the loss of thinking skills through the progressive degeneration of central nervous system neurons. Over the last decade, γ-secretase emerged as a promising target for the treatment of Alzheimer’s disease. The γ-secretase modulator compounds would be good candidates for AD therapeutics. In previous years, a series fused 5,6-bicyclic heterocycles were investigated as γ-secretase modulators or anti Alzheimer’s agents. In the present study, a quantitative structure activity relationship (QSAR) study of twenty-eight derivatives of fused 5,6-bicyclic heterocycles has been made with the help of topological parameters. The descriptors that have been used are solvent accessible surface area, valence connectivity indices of order 0, 1 and 2 and shape indices of order 1, 2 and 3. The best QSAR model for this set of derivatives has been obtained by using solvent accessible surface area as first descriptor, valence connectivity index (order-0) as second descriptor, valence connectivity index (order-1) as third descriptor and shape index (order-3) as fourth descriptor. The correlation coefficient (r 2 ) and cross validation coefficient (rCV2 ) for this model are 0.773037 and 0.688568, respectively.
STUDY OF THE CONNECTION BETWEEN ROOM SIZE AND RADON/THORON DOSE RATES IN BANGALORE METROPOLITAN AREA
Authors:   Department of Physics, Government Science College, Nrupathunga Road, Bangalore-560001, India, e-mail: lasgayit@gmail.com, Sathish L.A.
Published: October 2023

The emanation of gases from the walls, floors, and ceilings is the main source of radon (Rn) and thoron (Tn) in enclosed rooms. The bulk of terrestrial construction materials contain gas in their pores in concentrations 1,000−10,000 times higher than those in the atmosphere. This high concentration results in a considerable radon/thoron concentration difference between the construction materials and ambient air. In this study, indoor radon, thoron, and their progeny concentrations, in Bangalore Metropolitan households, were measured using a significant number of dosimeters.
THE INHIBITORY EFFECT OF SILYBUM MARIANUM (MILK THISTLE) SEEDS EXTRACT ON SERUM ALBUMIN GLYCATION BY GLUCOSE, FRUCTOSE AND GALACTOSE
Authors:   Faculty of Biology, University of Bucharest, Bucharest, Romania, AL-SAEDI J.H.M , MERNEA MARIA ,   Faculty of Biology, University of Bucharest, Bucharest, Romania, ANGHELESCU GIORGIANA DIANA CARMEN ,   Faculty of Biology, University of Bucharest, Bucharest, Romania , Oncological Institute “Prof. Dr. Alexandru Trestioreanu”, Bucharest, Romania, NIȚU CRISTINA DOINA ,   Faculty of Biology, University of Bucharest, Bucharest, Romania, STOIAN G. ,   Faculty of Biology, University of Bucharest, Bucharest, Romania, MIHĂILESCU D.F. ,   Faculty of Biology, University of Bucharest, Bucharest, Romania Biometric Psychiatric Genetics Research Unit, ”Alexandru Obregia” Psychiatric Hospital, Bucharest, Romania
Published: October 2023

Protein glycation consists of the non-enzymatic attachment of monosaccharides to proteins. This leads to the formation of advanced glycation end products (AGEs) that are held responsible for diabetes complications. There are some drugs that inhibit AGEs, but their usage is limited by side effects. Plant-based therapeutic strategies could be useful in overcoming this limitation. Silybum marianum (Milk thistle), a plant used to treat liver problems, was also proved useful in the treatment of type 2 diabetes. Here we investigated the ability of S. marianum extract to inhibit the in vitro glycation of bovine serum albumin (BSA) by three physiologically relevant monosaccharides, namely glucose, fructose and galactose. BSA was glycated in the absence and in the presence of 0.1 %, 1 % and 5 % S. marianum seeds hydroalcoholic extract. Measurements on fructosamine, AGEs and amyloid cross-β structures formation showed that the plant extract inhibited these processes in the case of the three monosaccharides, especially in the case of glucose and galactose. The inhibition was dose- dependent and time-dependent. Our results demonstrate the ability of the plant extract to inhibit the in vitro glycation of BSA.
LASER INDUCED CONFORMATIONAL CHANGES OF LIPIDS WITHIN MULTILAMELLAR VESICLES
Authors:   Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia, #e-mail: mmady@ksu.edu.sa, MADY M. , HUSSIEN MANAL ,   Photochemistry and Photobiology Unit, National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt
Published: October 2023

"The biomedical potential of destabilizing liposomes through photoinduction relies on the use of near-infrared light, which offers inherent therapeutic advantages. Researchers have explored the effects of infrared laser light on dipalmitoyl phosphatidylcholine (DPPC) multilamellar vesicles, specifically investigating the interaction between the laser and zwitterionic dipalmitoyl phosphatidylcholine multilamellar vesicles using Fourier transform infrared spectroscopy and differential scanning calorimetry measurements. The results revealed that laser irradiation increased the number of gauche conformers and led to conformational changes within the acyl chains of the phospholipids. The transition temperature of lyophilized vesicles was also shifted to a lower temperature after laser irradiation, indicating that the laser had a dipalmitoyl phosphatidylcholine multilamellar significant effect on the acyl chains in the dipalmitoyl phosphatidylcholine bilayers and decreased the transition cooperativity of lipid acyl chains. These findings could aid in the development of more effective liposomal drug delivery systems by enhancing our understanding of the interaction between laser and lipid bilayers."
A Liouville integrable hierarchy with four potentials and its bi-Hamiltonian structure
Authors:   Department of Mathematics, Zhejiang Normal University, Jinhua 321004, Zhejiang, China, WEN-XIU MA
Published: October 2023

"We aim to construct a Liouville integrable Hamiltonian hierarchy from a specific matrix spectral problem with four potentials through the zero curvature formulation. The Liouville integrability of the resulting hierarchy is exhibited by a bi-Hamiltonian structure explored by using the trace identity. Illustrative examples of novel four-component coupled Liouville integrable nonlinear Schr¨odinger equations and modified Korteweg-de Vries equations are presented."
Generation of high-energy near-infrared femtosecond laser pulses by optical parametric amplification in YCOB crystals
Authors:   ", DABU R. ,   ELI-NP, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077126 Magurele, Romania"
Published: October 2023

"The energy of near-infrared femtosecond laser pulses generated by optical parametric amplification (OPA) in β-barium borate (BBO) crystals pumped by femtosecond Ti:sapphire lasers is restricted to few-mJ due to the 20 mm limited diam- eter of available crystals. In a type I collinear OPA with an yttrium calcium oxoborate (YCOB) crystal, pumped with femtosecond Ti:sapphire lasers at 800 nm wavelength, the 1300 nm signal wavelength and 2080 nm idler wavelength are located in the normal and anomalous group velocity dispersion range, respectively. Due to the small group velocity mismatch (GVM) between signal and idler pulses, as broad as 27 THz gain bandwidth can be obtained in a 3-mm YCOB crystal at 100 GW/cm2 pump intensity. A high parametric gain is the result of the increased parametric interaction length due to the different signs of GVM between pump-signal and pump-idler pulses. More than 10-mJ energy femtosecond laser pulses at 1300 nm wavelength can be generated by OPA in YCOB crystals with larger than 50 mm clear aperture."
Disentangling between static and kinetic effects in the hysteresis of spin crossover molecular magnets
Authors:   Faculty of Physics, Alexandru Ioan Cuza University, Iasi, ANDRIESEI ALEXANDRA , PLESCA DIANA ,   Faculty of Physics, Alexandru Ioan Cuza University, Iasi, CAPU ROXANA ,   Faculty of Physics, Alexandru Ioan Cuza University, Iasi, STAN RALUCA-MARIA ,   Faculty of Physics, Alexandru Ioan Cuza University, Iasi, TANASA RADU ,   Faculty of Physics, Alexandru Ioan Cuza University, Iasi, ENACHESCU CRISTIAN ,   Faculty of Physics, Alexandru Ioan Cuza University, Iasi
Published: October 2023

"We investigate the kinetic hysteresis of spin crossover molecular magnets, with the aim of unravelling the link between static and dynamical effects observed in the first order reversal curves (FORC) diagrams. Using a mean-field model, we establish how the FORCs distributions are influenced by both the kinetic effects and the physical parameters of the system."
Innovative strategy based on green nanotechnology for elimination and reduction of aquatic weeds
Authors:   ", BARBINTA-PATRASCU M.-E. ,   University of Bucharest, Faculty of Physics, Department of Electricity, Solid-State Physics and Biophysics, 405 Atomistilor Street, PO Box MG-11, Bucharest-Magurele, 077125, Romania", NICHITA C. ,   "University of Bucharest, ICUB. Faculty of Physics, CTT-3Nano-SAE Research Center, MG-38, 405 Atomistilor Street, 077125, Magurele, Romania", ANTOHE S. ,   " University of Bucharest, Faculty of Physics, Department of Electricity, Solid-State Physics and Biophysics, 405 Atomistilor Street, PO Box MG-11, Bucharest-Magurele, 077125, Romania"
Published: October 2023

"This study reports an interesting idea to convert aqueous extracts of invasive terrestrial plants [Johnsongrass (Sorghum halepense L.) and Knotgrass (Polygonum aviculare L.)] into valuable silver nanoparticles (AgNPs), and used them against aquatic weeds (Cladophora). The phyto-generated AgNPs presented nano scaled dimension (estimated by DLS), and good antioxidant activities (evaluated by chemiluminescence technique). UV-Vis absorption spectroscopy confirmed the AgNPs phyto-development. The total polyphenols (TPC) and total flavonoid (TFC) contents of the aqueous herbal extracts and of AgNPs phyto-generated from them, revealed the major contribution of polyphenols and flavonoids to phyto-reduction of silver ions, and also, they are responsible for the antioxidant properties of the obtained samples. The bio impact of the prepared AgNPs against Cladophora depends on the AgNPs dose, and the time exposure. These findings could be useful in for various biomedical, agronomic, and biotechnological applications."
Teaching biophysics I. The specific interactions: the sine qua non processes of life
Authors:   ", POPESCU AUREL I. ,   University of Bucharest, Faculty of Physics, Department of Electricity, Solid-State Physics and Biophysics, 405 Atomistilor Street, PO Box MG-11, Bucharest-Magurele, 077125, Romania", CHILOM CLAUDIA G. ,   "University of Bucharest, Faculty of Physics, Department of Electricity, Solid-State Physics and Biophysics, 405 Atomistilor Street, PO Box MG-11, Bucharest-Magurele, 077125, Romania"
Published: October 2023

" The manifestation of life, in all its aspects, is the result of an enormous number of specific biophysical and biochemical molecular interactions taking place ceaselessly into cells, in a highly ordered manner both spatially and temporally. Frequently, a product of any reaction, is not a final compound, but the initial reactant of another reaction taking place in a precise location and at right time into the intricate cellular reactions network. In this minireview, we will present, in an accessible manner, the nature and paramount importance of the specific interactions which constitute the essential basis for all life processes on the Earth"