bluuebunny/crossref_metadata_2025 huggingface dataset:
Need for a paradigm shift? Survival post-pancreatoduodenectomy remains poor despite surgical and oncological advances
Authors: Shepherdson Mia , Kilburn Daniel , Marshall-Webb Matthew , Ullah Shahid , Chen John , Brooke-Smith Mark
Published: March 2024

Background: Despite advances in surgical techniques and chemotherapy, poor outcomes persist in pancreatic malignancy. This study aimed to investigate clinical outcomes and describe the impact of factors like the closest resection margin on overall survival following open pancreatoduodenectomy at a tertiary referral centre over a ten-year period.
Methods: Patients who underwent a pancreaticoduodenectomy at a tertiary hospital in South Australia between 2009-2019 were included in this retrospective study. Patient demographics, systemic treatments, complications, and histological features were analysed for their role in overall survival. Kaplan-Meier survival curves were used to assess patient survival and estimate median survival time.
Results: There were 134 open pancreaticoduodenectomy procedures during 2009-2019. Majority of patients were male (54.7%) between 65-75 years of age (41%) with an ASA physical status classification grade of 3 (63.3%). 56.7% of patients experienced a complication with 5 in-hospital deaths recorded and 12 ISPGF grade B or C pancreatic anastomotic leaks (n=5, n=7 respectively). 88% of resected specimens were malignant with an overall 5-year survival of 32%. A resection margin of >2 mm had a significantly improved overall survival compared to 0 mm (p=0.01). There was no survival benefit for a resection margin of <1 mm or 1-2 mm compared 0mm margin (p=0.6 and p=0.2 respectively). 65 patients (54.6%) experienced either local or distal disease recurrence by the end of the study period.
Conclusions: There has been no improvement in overall survival post pancreatoduodenectomy for pancreatic malignancy. Further research into the clinical significance of the R status classification is required.
Outcome of primary ventral hernia repair with monofilament polyester composite ventral patch in a community-based hospital
Authors: Kumar R. Hareesh , Arulraj Solomon Alfred , Veeraraghavan Rajakumar
Published: March 2024

Background: Ventral hernia repair (VHR) is one of the common surgical procedures carried out in general surgery. This study assessed the post operative outcomes in patients with primary ventral hernia undergoing repair using monofilament polyester composite ventral patch Parietex™ Covidien (PCO-VP).
Methods: A prospective single proportion observational study of 54 patients undergoing open VHR for primary ventral hernia with the PCO-VP in a community-based hospital was carried out. The patients were followed up for a period of one year from day of surgery. Primary outcome was recurrence, and secondary outcomes were reoperations and complications including seroma, hematomas, abdominal wall abscess, wound infections, and mesh infections.
Results: Our sample size of (n=54) included 35 (65%) females and 19 (35%) males with a mean hernia defect diameter of 3.5±0.4 cm. 83% (45) underwent elective surgery (EL) and 17% (9) underwent emergency surgery with a mean operative time of 98.5 minutes, 11% (n=6) patients needed alteration of the technique and 20% (n=11) patients needed mesh repositioning, 12 adverse events were noted during the hospital stay. No mesh infections, early recurrences, readmissions or revision surgeries were noted. Patients had a average Carolina comfort scale score of 4/115 noted at the end of study.
Conclusions: The use of PCO-VP to repair primary ventral hernia yielded nearly nil early recurrence rate, low postoperative complications and high satisfaction ratings, PCO-VP repair is a highly effective method for small and moderate size ventral hernias in both elective and emergency setting.
Massive diaphragmatic eventration: plication
Authors: Gajbhiye Ashok S. , Tamgadge Lalit V. , Durge Sarita , Kolasani Ayyappa Sai Kumar
Published: March 2024

Diaphragmatic eventration (DE) is a distinctive condition characterised by the abnormal elevation or displacement of a portion of the diaphragm, often leading to a protrusion of abdominal contents into the thoracic cavity. Unlike diaphragmatic hernias, eventrations involve a congenital or acquired weakness of the diaphragmatic muscle itself rather than a structural defect. Congenital eventrations typically arise from the incomplete development or muscular hypoplasia of the diaphragm, while acquired forms may result from trauma, surgery, or neurological disorders affecting the phrenic nerve. Clinical manifestations vary widely, with some individuals remaining asymptomatic, while others may experience respiratory difficulties, especially when lying down. The case involves a 65-year-old female with a history of breathlessness exacerbated in the lying position, improved when upright. Examination revealed low oxygen saturation, absent breath sounds on the left chest, and bowel sounds in that region. Chest X-ray and HRCT indicated bowel loops in the left chest due to eventration of the left hemidiaphragm. Surgical intervention involved thoracotomy, identifying a lax left hemidiaphragm, mobilising abdominal contents, and performing plication with proline 1-0. Closure was completed with an intercostal drainage (ICD) in the left thoracic cavity. Postoperative period was uneventful. This case emphasises the significance of prompt diagnosis and surgical intervention in managing DE, showcasing the effectiveness of thoracotomy, hemidiaphragm plication, and ICD placement.
Lessons learnt from uncommon events during robotic assisted minimally invasive oesophagectomy
Authors: Pawar Suraj B. , Bagul Kiran G. , Nilapwar Rishikesh D. , Bhandari Hitesha , Pawar Aditya S.
Published: March 2024

Esophagectomy is the mainstay treatment for cancer of the esophagus. Over the last two decades robotic assisted minimally invasive oesephagectomy (RAMIE) have become increasingly popular in esophageal surgery. We present a rare complication of an air leak following RAMIE. Our patient underwent a robotic assisted total esophageal mobilization, lymph node dissection transthoracically for a lower oesophageal tumour. He developed persistent air leak and needed oxygen support. Following which thoracoscopic bullectomy was done, lung was successfully re-inflated. To the authors’ knowledge, this rare complication has only handful cases reported in the medical literature; other surgeons should be made aware of this problem.
Impacto de la conectividad digital en hogares liderados por mujeres, individuos de pueblos indígenas o afrodescendientes en Ecuador
Authors: Katz Raúl , Valencia Ramiro , Callorda Fernando , García Zaballos Antonio , Iglesias Rodriguez Enrique , Dalio Maribel
Published: March 2024

El objetivo de este documento es estudiar el efecto socioeconómico de las tecnologías digitales (uso de Internet o computadora y tenencia de celular) en Ecuador, abordando el análisis desde un enfoque cuantitativo (modelo econométrico).El análisis cuantitativo se centra en el impacto diferenciado del uso de tecnologías digitales en los ingresos y el empleo en individuos residentes de hogares liderados por hombres o mujeres, en individuos pertenecientes a pueblos indígenas y en individuos de etnia afrodescendiente. Asimismo, la investigación también mide el impacto de dichas tecnologías en subgrupos de las categorías precedentes desagregados por sexo, nivel educativo y zonas geográficas. En términos de resultados, si bien las tecnologías digitales contribuyen al aumento de los ingresos (y, por lo tanto, generan un beneficio económico) de los individuos que viven en hogares liderados por mujeres o de los individuos que pertenecen a pueblos indígenas o afrodescendientes, su impacto en el largo plazo en relación con otros grupos sociales presenta importantes diferencias.
System of restrictions in public law
Authors: Amelchakova Anastasia V.
Published: March 2024

The article examines the system of restrictions created and applied within the framework of public law, contributing to the achievement of the goals of public legal regulation. It is substantiated that such a system includes, along with universal ones, specific means, the demand for which is determined by the purpose of public law and the logic of regulating public legal restrictions. It is argued that in modern conditions, restrictions aimed not only at ensuring generally recognized interests, but also the scope and parameters of its action are in demand in public law.
Features of the presentation of delinquent practices in the structure of economic behavior of young people
Authors: Grosheva Lyubov I. , Groshev Igor L. , Grosheva Irina A.
Published: March 2024

The article presents data from theoretical analysis and applied research that reveals the specifics of the presentation of delinquent economic behavior of young people in the media. Using the example of an interdisciplinary assessment of the structure and functioning of the phenomenon, the main characteristics of economic activity in general and its destructive form in particular are considered. An analysis of domestic and foreign views on the motivation and mechanism for implementing economic actions is presented, depending on a combination of internal and external factors. The basic characteristics of youth activity, its risk and potential areas of growth and productivity are considered. The interaction of a set of conditions and elements of economic activity is presented in the form of a complex model that demonstrates the reasons for the divergence of socially approved and preferred strategies in the youth community. Using the example of quantitative and qualitative content analysis, the authors described the specifics of displaying destructive economic activity in its relationship with the reflection of the target audience and the gender specificity of information perception. The presence of high interest (and frequency of publication) in content that considers illegal actions as a unique way of self-realization, in turn, reflects the most significant risk potential of the media environment, characterized by a low resource for implementing effective social control.
Zarządzanie kryzysowe jako obszar badawczy nauk o bezpieczeństwie
Authors: Skrabacz Aleksandra , Pajka Aneta , Więckowski Bartłomiej
Published: March 2024

Problematyka zarządzania kryzysowego jest stale obecna w literaturze przedmiotu, zwłaszcza międzynarodowej. W Polsce zainteresowanie badaczy tą problematyką jest stosunkowo krótkie, samo pojęcie zostało bowiem zaimplementowane z rozwiązań amerykańskich i przeniesione na grunt ochrony ludności pod koniec lat 90. XX wieku. Celem artykułu jest zatem zaprezentowanie strukturalnego przeglądu badań dotyczących zarządzania kryzysowego w latach 1945-2023. Przedstawiono genezę zarządzania kryzysowego w Polsce oraz dokonano analizy bibliometrycznej dorobku publikacyjnego znajdującego się w bazie SCOPUS.
Uwarunkowania sprawnego współdziałania podmiotów zarządzania kryzysowego na przykładzie ćwiczenia symulacji katastrofy komunikacyjnej
Authors: Jaszczur Wiesław , Noga Henryk
Published: March 2024

W raporcie z badań, na podstawie ćwiczenia (symulacji), przedstawiono uwarunkowania i możliwości sprawnego współdziałania podmiotów zarządzania kryzysowego (ZK) w sytuacji zaistnienia zdarzenia masowego, w tym przypadku katastrofy komunikacyjnej. Omówiono zakres, w jakim podmioty ZK zgodnie ze swoimi procedurami i zasadami, normami i wypracowaną dobrą praktyką koegzystencji realizują ustawowe w akcji ratowniczej zadania, które wyszczególnia się na czynności ratownicze i procesowe. Zrealizowane ćwiczenia z udziałem wszystkich (aplikacyjnie) podmiotów ZK w sytuacji identyfikacji zagrożenia bezpieczeństwa ruchu drogowego sformułowanego jako komunikacyjnego wypadku masowego, stanowiły integralną część projektu naukowo-badawczego. Uwzględniając zrealizowane badania empiryczne przedstawiono propozycje usprawnienia procesu (jego poprawy) współdziałania podmiotów zarządzania kryzysowego. Celem badań było zdiagnozowanie ograniczeń sprawnego współdziałania podmiotów ZK oraz sformułowanie warunków i propozycji usprawnienia tej współpracy.
Mobile phones as an effective learning resource: Science teachers’ perspectives
Authors: Kraishan Osama M
Published: March 2024

This study aimed to find out the perspectives of science teachers on the effectiveness of using mobile in learning and education. Technological development in all areas of life has made an impact on the development of the educational process, through the invention of devices such as cell phones which had a share of this development. These devices were developed to support programs and applications that help in the education and teaching process. The current study used the analytical descriptive approach applied to a group of 150 male and female teachers in secondary schools in Al Dakhiliyah Governorate in Oman. Interviews were conducted with all 150 participants by asking specific questions in order to be classified and analyzed in a scientific way that helped to understand teachers' perspectives in the context and compared to previous literature. The findings revealed the positive impact of using the cell phone in learning and its effectiveness in improving and developing the educational process despite challenges. Cell phones have proved their effectiveness in facilitating the learning process as the results of this study showed that they encouraged science teachers and motivated them to use cell phones in their lessons
Geometric AR-based pedagogical module is beneficial: Affecting factors from the lens of Malaysian mathematics secondary school teachers
Authors: Yahya Faridah Hanim , Ayob Aszunarni , Jamil Mohd Ridhuan Mohd , Zalli Mohd Muslim Md , Murtafiah Wasilatul
Published: March 2024

The purpose of this study was to predict the likelihood that teachers would consider the Geometric AR-based Pedagogical Module (GeAR-PM) as beneficial, and study the factors that influence their decision. The data for this study was gathered via a survey method. A sample of 202 Malaysian secondary school teachers was randomly selected as respondents for this study. Specifically, the respondents were asked to answer questions using an instrument which was developed based on the Unified Theory of Acceptance and Use of Technology (UTAUT) model. This study comprised four UTAUT variables: performance expectation, effort expectancy, social influence, and facilitating conditions, and one additional variable, self-efficacy. All variables showed high reliability with Cronbach Alpha’s values between 0.87 to 0.91. The data was analyzed using a binary logistic regression via Statistical Package for the Social Sciences (SPSS) version 27.0. The findings revealed that a teacher's belief that GeAR-PM is beneficial was significantly related to his/ her perception on effort expectancy, social influence, and self-efficacy. Hence, when developing the GeAR-PM, these three factors should be weighed up.
SOME CHARACTERIZATIONS OF LEFT(RIGHT) HOM-ALTERNATIVE ALGEBRAS
Authors:   Université d’Abomey-Calavi 01 BP 4521, Attan Sylvain
Published: March 2024

Some characterizations of left(or right) Hom-alternative algebras are given. Using a Hom-Bol algebra structure on a left(or right) Hom-alternative algebra, a necessary and sufficient condition for Hom-Malcev admissibility of a left(or right) Hom-alternative algebra is obtained.
A CHRYSIPPIAN MODAL VIEW OF AN ATOM IN QUANTUM PHYSICS
Authors:   The University of Douala, Tsimi Jean Armand
Published: March 2024

In this note, we intend to propose a chrysippian modal view of the hydrogen atom in quantum physics.
A NOTE ON BANDED LINEAR SYSTEMS
Authors:   Universidad Politécnica de Madrid, Rolanía D. Barrios , García-Ardila J. C.
Published: March 2024

In previous works, we studied and analized the Darboux factorization for semi-infinite Hessenberg banded matrices. In this note, we prove that this kind of factorization can be used also for finite matrices. In addition, a new method for solving banded linear systems is provided. Finally, some numerical experiments are reported to show the effectiveness of the proposed method.
CARL SCHMITT AND FRIEDRICH HAYEK ON DEMOCRACY: ELECTIVE AFFINITIES?
Authors: VAKI FOTINI
Published: March 2024

The aim of the present paper is to disclose the structural affinities between Carl Schmitt and Friedrich Hayek regarding the concept of parliamentary democracy. Identifying Hayek’s neoliberal thinking with Schmitt’s theoretical justification of fascism would apparently be an a-historical overgeneralization. While Schmitt develops a model of absolute sovereignty relying on the sovereign’s decision on the state of exception, Hayek envisages the historical realization of those conditions allowing the market competition to flourish. Schmitt’s model subjugates market to an omnipotent state whereas Hayek views the latter as an engine abetting the free market competition.   

A closer reading, however, could discern affinities behind the seemingly opposed models of the two thinkers. 

Schmitt’s model of an emergency dictatorship and Hayek’s nomocracy are two different responses and attacks to the Left’s attempt to construct a democratic welfare state in the Weimar Republic and postwar Europe. Schmitt advocates the concentration of political power in a totalitarian state as the sole “remedy” to the democratic contamination of liberalism induced by the politicization of civil society. Similarly, Hayek castigates any state intervention taking the form of the welfare state but endorses a powerful state entrusted with the role of securing the conditions of market competition.
RUSO, KANT I KRITIKA PROSVEĆENOSTI
Authors: HRISTOV ĐORĐE
Published: March 2024

U ovom radu se osvrćemo na Rusoovo i Kantovo shvatanje prosvećenosti kroz prizmu Kantove ideje „nedruštvene društvenosti“, sa ciljem da pokažemo da Rusoova kritika prosvetiteljstva pretpostavlja drugačiju ideju hrabrosti od one koju zagovara Kant u svom spisu Šta je prosvećenost?. U prvom delu rada problematizujemo Kantovu ideju „nedruštvene društvenosti“ kao mehanizma koji vodi do prosvećenosti i intelektualne nezavisnosti, pokazujući da se koreni ove ideje nalaze u Rusoovoj filozofskoj istoriji čovečanstva. U sledećem koraku pokazujemo kako Ruso argumentuje protiv ideje progresa koju Kant locira u „nedruštvenoj društvenosti“. Konačno, na osnovu ovih prikaza pokazujemo da je Ruso kritikovao prosvetiteljstvo, društveno posredovanje i spoznaju sa stanovišta republikanske slobode, koja po njemu zahteva drugačiju formu odnosa društvenosti i nedruštvenosti, pa time i alternativno shvatanje hrabrosti od onog koje je sadržano u Kantovom apelu „Sapere aude!“.
SOME NOTES ON THE INDIVIDUAL PROCESS OF LIBERATION IN SPINOZA
Authors: BOUVOT KATHRIN , SEGALERBA GIANLUIGI
Published: March 2024

A central theme of Spinoza’s Ethica is the description of the individual’s exposition to the emergence of passions: the individual’s mind is constitutively liable to being passive in relation to the influences exercised on the mind by reality since the mind is a part of nature. As regards the individual’s condition, being passive means having passions: passions bring the individual to a condition of mental enslavement due to the influence coming from the external reality.

Spinoza tries to find a way out of the passions: through the analysis of the structure of reality and of the individual’s mind, Spinoza shows that the development of knowledge of reality in the mind is the solution for the process of liberation of the mind. The power of the individual’s mind consists in the knowledge of reality: therefore, the possibility, for the individual, to reach an authentic power of mind consists in the acquisition of the knowledge of reality. This acquisition comes about exclusively through the appropriate education. Through the knowledge, the individual becomes able to counteract his being acted on by the external reality: he can lead his life instead of being steadily led by the influences coming from outside.

We base our inquiry on Spinoza’s Ethica.
Jurisprudence for the Development of Science: Ideas that Should Not Be Forgotten (To the 100th Anniversary of the Institute of Legislation and Comparative Law under the Government of the RF)
Authors: Putilo Natalia
Published: March 2024

The article examines topical issues in regulation and organization of academic activities, which are related to the more than 100-year history of functioning of one of the oldest research institutions in the country – the Institute of Legislation and Comparative Law under the Government of the Russian Federation. In the course of the study of archival materials and available publications by the Institute’s employees, some original and currently relevant proposals and hypotheses were identified. They are concerning the organization of research, the direct implementation of academic activities, as well as relations in the field of science subject to legal regulation (in particular, those related to: the distinction of legislation on the scientific and technical process as an independent part in the system of national law in the 1960s; the impossibility of scheduling scientific discoveries; the need to involve researchers (the object of control) in the management process; the “probabilistic” nature of research and the infeasibility of standardization in research work as is the case with setting norms in industrial production; the incorrectness of identification of administrative management in science with academic advising as a specific phenomenon, etc.). These remain relevant to this day. An attempt has been made to correlate the developments of the team of the particular academic organization with the sociopolitical situation in the corresponding historical period and the dominant scientific positions.
The New Sociology of Morality: Cognitive and Analytical Perspectives
Authors: Bykov Andrey
Published: March 2024

This article presents analysis of the prospects for the development of the new sociology of morality in the context of ongoing efforts to institutionalize this area of research. In order to assess and generally classify the theoretical and empirical research that has been conducted as part of this project so far, as well as to determine the possible and potentially promising directions for its further evolution, the author identifies two complementary perspectives — cognitive and analytical sociology of morality. This distinction is proposed based on opposing views held by the authors of this research tradition concerning the extent to which the sociology of morality should incorporate the models of explanation and methods of studying morality from the (much more popular and influential) field of cognitive psychology. The article contains a brief general overview of several conceptual and empirical works that serve as examples of each of the two identified perspectives, and also explicates the differences between them based on three dimensions — theoretical, methodological, and axiological. In addition, the article discusses the key features and potential problems for the future development of cognitive and analytical perspectives in sociology of morality, while also identifying a few potential ways to overcome them. Thus, this work contributes to the ongoing development of the program to research the new sociology of morality by demonstrating crucial features and pointing out the key problems of the two identified perspectives, as well as revealing their potential in terms of deepening both sociological and interdisciplinary knowledge about the nature of human moral capacity.
The nation’s Attitude towards the Main Social Contradictions in Russian Society: Current State, Dynamics, Factors
Authors: Dudin Il’ya
Published: March 2024

The special military operation on the territory of Ukraine has become the main catalyst for certain significant changes now occurring in the public mind. Tensions between Russia and Western powers have reached their highest point in the country’s modern history. Given the circumstances, what contradictions do the Russian people consider to be the most pressing and fundamental? Have their overall views changed compared to previous years? What factors primarily influence how the contradictions within Russian society are perceived? In order to answer these questions, the article presents an analysis of changes in the attitude of Russian people towards contradictions of various nature, based on data from nationwide surveys conducted by IS FCTAS RAS in 2005, 2015 and 2023. Groups of contradictions were analyzed that differ in terms of the dynamics of popular attitudes towards them for the time period in question. It is shown that in 2005–2015 Russian people were most upset on account of economic contradictions. However by 2023 ideological contradictions came to the forefront, which in no small part contributed to the emergence of a new contradiction that can be considered the most crucial one of that particular year, referring to the divide between supporters and opponents of Russia’s policy towards Ukraine. Residents of Moscow and St. Petersburg more often than not would take a very particular stance in regards to contradictions within Russian society from 2005 to 2015, as well as young people under the age of 25 and citizens who considered their financial situation to be subpar. In the summer of 2023, financial status of citizens in their subjective understanding still had a serious impact on how the severity of the key contradictions in Russian society was perceived. However, we can now add worldview factors to the list of important determinants influencing attitudes towards them, such as: specific political views, attitudes towards the main power structures, primarily towards the President and the State Duma.
Diplomasi Kebudayaan Japan Foundation di Tengah Pandemi Covid-19 tahun 2019-2022
Authors: Rahmansyah Muhammad Raihan
Published: March 2024

Japan Foundation merupakan sebuah lembaga nirlaba khusus yang bergerak pada bidang pertukaran kebudayaan. Lembaga ini pertama kali dibentuk oleh parlemen Jepang pada tahun 1972 dan berpusat di Tokyo. Japan Foundation didirikan dengan tujuan untuk mempererat hubungan masyarakat Jepang dengan masyarakat di negara-negara lain melalui pertukaran kebudayaan. Namun demikian, program-program kerja sama yang dilaksanakan Japan Foundation sejak akhir 2019 terhambat oleh situasi pandemi COVID-19 yang membuat banyak negara mengambil keputusan untuk menutup jalur perjalanan internasional dan meminimalisir aktivitas tatap muka. Penelitian ini ditujukan untuk menjelaskan strategi diplomasi kebudayaan yang digunakan Jepang melalui Japan Foundation agar tujuan diplomasi Jepang pada era pandemi COVID-19 relatif masih dapat tercapai.
Textilien und weitere organische Materialien aus Grab 58 von Trossingen (Lkr. Tuttlingen) : Analyse und kulturräumliche Interpretation selten erhaltener Grabausstattungselemente einer um 580 n. Chr. datierten Männerbestattung
Authors:   , Niepold Tracy
Published: March 2024

Im Winter 2002/2003 wurde im Gebiet der heutigen Stadt Trossingen in Baden-Württemberg das Grab eines um 580 n. Chr. bestatteten, etwa 35 bis 40 Jahre alten Mannes freigelegt (Grab 58) und als Blockbergung entnommen. In dem Grab hatten sich durch jahrhundertelang anstehende Staunässe nicht nur Beigaben aus Holz, sondern auch nass vorliegende Schichten aus stark abgebauten Überresten von Textilien, Leder, Fell und botanischen Materialien erhalten. In der vorliegenden Arbeit wurden diese dokumentarisch erfasst, material- und herstellungstechnisch analysiert und die Ergebnisse kulturhistorisch eingeordnet. So konnten die erhaltenen Überreste der angelegten Bekleidung des Bestatteten und verschiedenen Elementen der Totenbettausstattung zugeordnet werden. Durch die Anwendung unterschiedlicher mikroskopischer Faserbestimmungsmethoden, Farbstoff- und Proteinanalysen ließen sich zehn verschiedene Textiltypen bestimmen sowie die verwendeten Leder- und Fellarten identifizieren. Von besonderer Bedeutung ist der Nachweis eines rapportgemusterten Taquetégewebes und zweier unterschiedlich gearbeiteter Wirkereien, deren Herstellung eng mit der Textilkultur des Mittelmeerraums und dem textiltechnologischen Know-How der dortigen Werkstätten verbunden ist. 14C-Datierungen ergaben, dass diese Gewebe mit großer Wahrscheinlichkeit in der Spätantike hergestellt worden sind und damit bereits mehrere Jahrhunderte alt waren, als sie der Bestattung in Trossingen beigegeben wurden. Die Untersuchungsergebnisse geben somit einen seltenen Einblick in den Umfang und die Fülle an Textilien, Gegenständen aus Leder, Fell sowie botanischen Materialien, die ebenso wie andere Beigaben aus Metall oder Keramik wesentlicher Bestandteil der Körperbestattungen des 6. und 7. Jh. n. Chr. waren, jedoch andernorts zumeist vollständig vergangen sind.
Notes on two unusual Circus harriers in Perth, Western Australia, and implications for identification of Swamp and Eastern Marsh Harriers in Australasia
Authors: Davison Drew
Published: March 2024

A long-staying Circus harrier with features atypical for the locally common Swamp Harrier C. approximans was present between 2014 and 2023 at Herdsman Lake, Western Australia. These plumage features are not recorded in any reference literature for the Swamp Harrier, thus leading to speculation as to the identification of this bird. Several under- and upperwing features more consistent with Eastern Marsh Harrier C. spilonotus are noted; however, other plumage features are more typical of Swamp Harrier, a species with highly variable plumage. This paper documents the atypical features of this and a similar individual from the Eric Singleton Bird Sanctuary, Western Australia, and briefly discusses related identification issues.
Численное моделирование слоев смешения в сжимаемой жидкости с применением бикомпактной схемы
Authors: Bragin Mikhail Dmitrievich
Published: March 2024

Рассматривается бикомпактная схема для уравнений Навье-Стокса в случае сжимаемой теплопроводной жидкости. Схема строится методом расщепления по физическим процессам, имеет четвертый порядок аппроксимации по пространству и второй -- по времени. Выводятся новые, сохраняющие консервативность формулы перехода между двумя различными представлениями численного решения в бикомпактных схемах для уравнений гиперболического и параболического типов. Параллельная программная реализация бикомпактной схемы тестируется на сильную масштабируемость по числу процессов. По бикомпактной схеме проводится трехмерное прямое численное моделирование слоя смешения при конвективных числах Маха 0.4 и 0.8. В рассчитанных течениях детально разрешается зона турбулентного перемешивания, адекватно воспроизводятся явления, наблюдаемые в эксперименте. Демонстрируется хорошее количественное согласие с моделированием, проведенным другими авторами.
Об одной пространственной фильтрационной модели с неклассическим законом движения в гидратосодержащей среде
Authors: Bakir Ahmed El'said Ezeldin Bakir Ali , Poveschenko Yurii Andreevich , Podryga Viktoriya Olegovna , Rahimli Parvin Ilgar kizi
Published: March 2024

Предлагается пространственная двухкомпонентная (H2O, CH4) трехфазная (гидрат, свободные вода и газ) модель фильтрации с учетом диссоциации газовых гидратов, основанная на расщеплении по физическим процессам, с использованием неклассического закона движения (с учетом его нелинейности). Представленная математическая модель позволяет рассчитывать двумерные течения в областях с нерегулярной структурой пластов. С ее помощью можно проводить как профильные, так и площадные расчеты, учитывая при этом сложную геометрию осадочных бассейнов. При ее апробации для решения задач теории фильтрации в осадочных бассейнах применен и программно реализован метод опорных операторов. Этот метод позволяет рассчитывать процессы фильтрации в средах с разрывными физическими свойствами, что достигается использованием нерегулярных сеток. В результате появляется возможность моделировать зоны сдвига и получать численное решение в условиях разномасштабности задачи. При этом на сетках с крупными ячейками, где присутствуют разрывы материальных свойств, сохраняется качественная аппроксимация переноса насыщенностей и градиентов термодинамических величин. Построенная сеточная модель также аппроксимирует тождества метода опорных операторов на различных слоях по времени. На основе разработанной вычислительной технологии создан программный комплекс, инструментальные средства которого способны на сетках нерегулярной структуры решать двумерные задачи многофазного и многокомпонентного моделирования процессов диссоциации газовых гидратов в пористой среде осадочных бассейнов литологически сложной структуры. Для тестирования программного комплекса проведены модельные расчеты пьезопроводных процессов в трехфазной среде с гидратизированными твердофазными включениями в двумерном случае на нерегулярных сетках. Расчеты показали уменьшение значения депрессии внутри пространственных областей при использовании нелинейных фильтрационных законов движения в среде по сравнению с классическим законом Дарси, что позволяет корректно описывать физику низкопроницаемых коллекторов.
Численное моделирование генерации шума разными конфигурациями винтов мультикоптера
Authors: Aksenov Andrey Aleksandrovich , Timushev Sergei Fedorovich , Klimenko Dmitrii Viktorovich , Fedoseev Sergei Yur'evich , Moshkov Petr Aleksandrovich
Published: March 2024

Мультикоптеры (дроны) малой грузоподъемности широко используются для коммерческой и другой деятельности. В развитых странах Европы и в США начинают разрабатываться законодательные меры по ограничению шума мультикоптеров, поэтому низкий уровень шума мультикоптера с винтовыми движителями является важным фактором конкурентоспособности. Это требует развития методов вычислительной аэроакустики в сочетании с системами автоматизированного проектирования дронов, включая винтовые движители. Применение метода декомпозиции вихревой и акустической мод в дозвуковом изоэнтропийном течении, описанное в данное статье, позволяет учесть факторы неоднородности потока и интерференции роторов. Для верификационных расчетов использована однопроцессорная версия ПО, реализующая данный метод во временной области для частоты следования лопастей винтов (ЧСЛ). Получены сравнительные характеристики параметров звукового поля для разных конфигураций роторов в режиме висения над землей. Показана необходимость оптимизации взаимного положения винтов мультикоптера для обеспечения низкого уровня излучаемой звуковой мощности.
Гетерогенная параллельная реализация многосеточного метода c полной аппроксимацией в программном комплексе NOISETTE
Authors: Gorobets Andrei Vladimirovich , Sukov Sergei Aleksandrovich , Magomedov A R
Published: March 2024

Статья посвящена ускорению расчетов сжимаемых течений на гибридных кластерных системах с помощью многосеточного метода с полной аппроксимацией (FAS MG--Full Approximation Scheme MultiGrid). Базовая численная методика имеет следующие особенности: для пространственной дискретизации используются неструктурированные смешанные сетки и схемы с определением сеточных функций в сеточных узлах, для дискретизации по времени используется неявная схема. Целью данной работы является получение многократного ускорения расчета в стационарной постановке как на центральных, так и на графических процессорах без каких-либо существенных потерь в параллельной эффективности. Описывается подход к построению сеточных уровней, методика повышения качества сеточного представления геометрии моделируемых объектов, параллельная реализация в рамках комбинированного распараллеливания, сочетающего MPI для параллельной модели с распределенной памятью, OpenMP для модели с общей памятью и OpenCL для вычислений на графических процессорах различной архитектуры.
Некоторые способы параллельной реализации метода сопряженных градиентов с неявным факторизованным предобусловливателем
Authors: Milyukova Olga Yu
Published: March 2024

Рассматриваются два способа применения MPI и MPI+OpenMP технологии для построения и обращения предобусловливателя неполного треугольного разложения Холецкого без заполнения IC(0) для решения систем линейных алгебраических уравнений с произвольной симметричной положительно определенной матрицей. Они отличаются способом вычисления матрицы предобусловливания IC(0). Способы применения MPI и MPI+OpenMP технологии основаны на использовании упорядочений узлов сетки, согласованных с разбиением области расчета. Проводится сравнение времени решения задач методом сопряженных градиентов с предобусловливателем IC(0) с использованием MPI и гибридной MPI+OpenMP технологии на примере модельных задач и ряда задач из коллекции разреженных матриц SuiteSparse, а также сравнение времени решения этих задач с использованием двух способов применения MPI и MPI+OpenMP технологии.
PENGGUNAAN MEDIA SOSIAL YOUTUBE DALAM MENINGKATAN HASIL BELAJAR PADA MATA PELAJARAN SENI BUDAYA DAN PRAKARYA
Authors: Aldi Ruwi , Tirta Dimas Wahyu Negara
Published: March 2024

Tujuan dari penelitian ini adalah: (1) untuk mendeskripsikan penerapan media pembelajaran berbasis youtube pada mata pelajaran Seni Budaya dan Prakarya kelas IV di sekolah Madrasah Ibtidaiyah Salafiyah Barek Pucanganom Kebonsari Madiun, (2) untuk mendeskripsiskan keterkaitan media sosial youtube pada mata pelajaran Seni Budaya dan Prakarya kelas IV di sekolah Madrasah Ibtidaiyah Salafiyah Barek Pucanganom Kebonsari Madiun, (3) untuk mendeskripsiskan hasil belajar peserta didik penerapan penggunaan media sosial youtube pada mata pelajaran Seni Budaya dan Prakarya kelas IV di sekolah Madrasah Ibtidaiyah Salafiyah Barek Pucanganom Kebonsari Madiun. Penelitian ini peneliti menggunakan metode penelitian kualitatif dengan jenis fenomenologi. Pengumpulan data-data melalui observasi, wawancara dan dokumentasi. Analisis data yang digunakan dalam penelitian ini menggunakan model dari Miles and Huberman yang menyederhanakan kegiatan analisis data menjadi beberapa bagian yaitu: reduksi data, penyajian data, dan penarikan kesimpulan.Hasil dari penelitian ini sebagai berikut: (1) Penggunaan media sosial youtube sebagai media pembelajaran untuk meningkatkan pemahaman peserta didik pada mata pelajaran seni budaya dan prakarya kelas IV di Madrasah Ibtidaiyah Salafiyah Barek Pucanganom Kebonsari Madiun yaitu guru memutarkan video sesuai materi yang akan diberikan dan diberikan penjelasan mengenai isi dari video tersebut.(2) Keterkaitan penggunaan media sosial youtube dengan mata pelajaran seni budaya dan prakarya sebagai media pembelajaran dinilai sangat tepat dikarenakan banyaknya isi dan konten yang tersedia pada aplikasi youtube yang memudahkan guru untuk memberikan video mengenai materi yang disampaikan. (3) Hasil belajar peserta didik dari penggunaan media sosial youtube pada mata pelajaran seni budaya dan prakarya dapat dilihat dari semangat belajar peserta didik dalam mengikuti kegiatan pembelajaran di kelas.
Produced Water Re-Injection, A Holistic Approach from Pilot to Full Field Implementation and Enhancement
Authors: Alshalabi A. A. , AL Kenawy M. , Al Amiri F. , Saleh S.
Published: March 2024

Field X is a giant oil field which is an elongated, faulted anticline with longer axis trending northeast-southwest and located onshore UAE. In 1980s’, peripheral water injection (PWI) scheme supplied by brackish water from the aquifers (Regional Aquifers: perforated in Umm Er Radhuma and open hole in Simsima) was the main driving mechanism. The studied reservoir is divided into two main zones showing a high permeability contrast with an upper zone ranging from 10 to 5000 mD interbedded with low permeability layers (1-100mD) and a lower zone of limited heterogeneity and relatively low permeability ranging from 1 to 20 mD. This contrast in permeability provides good macroscopic sweep efficiency in the upper formation compared to the lower ones. Consequently, sharp increase in water cut trends in the upper formation is observed in 2002 which leads to (a) increase volumes of water disposing and treatment (b) environmental issues (c) government regulations (e) financial and economic factors.

The common practice was to drill dedicated wells to dispose of water which must be processed and treated to meet certain standards prior of disposing it. Water control treatments and disposing of water is a very time-consuming process with a considerable cost associated with it.

In alignment with our leadership directions moving towards zero emissions, waster to value conversion, no discharge to surface or sea and being proactive in handling the increasing water production volumes, 100% Produced Water Re-Injection (PWRI) strategy is embraced as a cost-effective manner to achieve our vision and strategy.

Many papers discussed the implementation of PWRI on a moderate scale. However, in this paper, 100% PWRI strategy in a mega field is discussed on an intensive and enormous scale from pilot phase till full field implementation and monitoring.(1,2,3,4,7)
An Integrated Study to Achieve Tech-Economic Produced Water Treatment & Re-Injection Solution
Authors: Liu Weiliang , Tiar Saloua , Grutters Mark , Li Zhengzhong , Zhai Feng , Mathur Avnish Kumar , AlDhanhani Jawaher Mohamed , Aktas Melike , Syofyan Syofvas , Al-Attar Mohamed , Zhang Yuchen , Zeng Sheng
Published: March 2024

This paper presents the results of an integrated study with a techno-economic solution for the treatment and re-injection of produced water (PW) in an onshore oilfield carbonate reservoir. The reservoir currently utilizes aquifer water injection for pressure maintenance, coupled with PW disposal. As PW volumes have increased over the years and disposal capacity has declined, the need for an alternative solution has become imperative. The proposed solution involves using PW for pressure maintenance, but the tightness of the reservoirs presents challenges such as potential formation damage and injectivity reduction. As a temporary solution the PW is mixed with aquifer water for reservoir pressure maintenance, aquifer water can be diluted with approximately 35% PW to enable reinjection without any treatment ([1] Grutters et al., 2023). The long-term objective presented in this paper is to define PW specifications and identify required PW treatment technologies and facilities upgrade to make it suitable for re-injection ([2] Lu Xianhui, 2023).

Produced Water Re-injection (PWRI) specifications were defined from core flood experiments together with corrosion experiments, representing four reservoirs with permeability of 1-10, 10-100, 100-500, 500-1000 mD. Mature PW treatment technologies, both mechanical and chemical, were investigated and compared whilst considering existing facilities upgrades to enable cost-effective PWRI to meet future production targets ([3] Mohammad A. Al-Ghouti et al., 2019).

Critical PWRI specifications OIW and TSS ranged from 51.5 to 246 mg/L and 24 to 64 mg/L respectively, for permeability of 1-10, 10-100, 100-500, 500-1000 mD. Corrosion experiments showed that the PW satisfied both the average corrosion and pitting corrosion requirements. Induced Gas Flotation (IGF) downstream of the existing PW skimming tank was proposed to reduce OIW < 40mg/L and TSS < 20mg/L with chemicals dosing meeting the PWRI requirements. The CAPEX and OPEX for the existing PW facilities upgradation and new built facilities were also estimated.

In order to reduce cost, the project was proposed to construct in three phases based on PW profile, with phase-1 to upgrade existing facilities. This integrated study has resulted in techno-economically feasible solutions that contribute to enhance reservoir water injection & support oil production and achieve sustainable targets by eliminating PW disposal in water aquifers.
Harnessing the Power of Swing Headers for Flexible Water Management
Authors: Ghamdi S. , Hassan M. , Al-Dhuwaihi S.
Published: March 2024

The objective of this paper is to introduce an innovative technique for managing water injection systems. The methodologies used in this paper involve swing headers that efficiently transition between seawater and water associated as a byproduct from oil wells, in response to increase in the water cut of produced oil. This technique optimizes water usage, eliminates waste, and reduces environmental pollution. The paper describes in the utilization of swing headers in water injection systems. This strategy involves the utilization of swing headers, enabling a transition between seawater and byproduct water from oil wells, as required. Furthermore, the rate of seawater and byproduct water are interactively set to be within the pumps operating windows to optimize their efficiencies. The procedure incorporates advanced filtration technology twinned with meticulous water monitoring, ensuring a smooth transition between seawater and produced water. This smooth transition would minimize the impact on reservoir injection quality while facilitating required water to be disposed from produced water. The implementation of this method provides an efficient way to manage any sudden increase or decrease in produced water from oil wells, minimizing waste and reducing environmental contamination. During high water cut, the injection wells will be swung to inject disposal water, while in low water cut the injection wells will be swung to seawater injection. This dynamic in water injection would ensure field readiness for sudden changes in produced water that's associated with rapid oil target changes. Detailed monitoring of water quality and the application of filtration technology have ensured optimal management in the water injection process. This system has proven to be flexible and cost-effective, while being environmentally friendly by eliminating water waste and reducing CO2 emissions by running seawater pumps on low rate with high efficiency. Ultimately, this paper concludes that this adaptable approach offers a comprehensive solution for prevalent water management challenges in the oil field industry. The introduction of swing headers to water injection systems, a pioneering approach, promises to challenge and enhance conventional strategies in the industry. Moreover, it offers an ingenious solution to water compatibility challenges related to the switch between seawater and byproduct water. The solution presented addresses water compatibility issues by facilitating an efficient transition between using seawater and byproduct water through an innovative swing header system. This breakthrough allows for the optimization of lowering waste output and cutting down on ecological pollution in the process. By addressing key concerns such as dynamic water cut, maximizing facility water pumps efficiency, and sustainable recycling sure to be of paramount interest to stakeholders.
Innovations in Sustainable Oil Production: The Deployment of Nanofiltration Techniques for Water Injection in ADNOC's Onshore Operations
Authors: Rayssi Ali Khalfan Al , Puzzo Simone
Published: March 2024

The objective of this paper is to scrutinize the technical feasibility and performance of Nanofiltration technologies in sustainable water injection for Abu Dhabi National Oil Company (ADNOC)'s onshore oil reservoirs. It evaluates the efficiency and environmental impact of Nanofiltration, initially focusing on reservoirs with a production capacity of 1.8 million barrels per day, and later extending to 2.4 million barrels per day. A hybrid approach combining computational simulations and empirical data collection is used. Laboratory experiments evaluate Nanofiltration efficacy in filtering seawater to meet required quality standards for oil reservoir injection. Field data from ADNOC's existing operations serve as a baseline for comparative analysis. Findings indicate that Nanofiltration technologies demonstrate a high degree of efficacy in filtering seawater to the required quality standards for oil reservoir injection. The technology shows promise in reducing the environmental footprint by minimizing groundwater extraction. Economic evaluations, although not the primary focus, suggest that Nanofiltration could become cost-effective in the long run. Initial phases targeting reservoirs with 1.8 million barrels per day production have been promising, validating the technology's scalability. This paper introduces a rigorous technical analysis of Nanofiltration technologies deployed for water injection in oil reservoirs, using ADNOC's operations as a case study. For engineers and technical experts, the paper provides a deep dive into the technological aspects of Nanofiltration, backed by empirical data and computational models, offering a technical roadmap for adoption in similar settings.