bluuebunny/crossref_metadata_2025 huggingface dataset:
Komponen Kimia Minyak Atsiri yang Diisolasi dari Daun Tanaman Pucuk Merah (Syzygium myrtifolium Walp.) dan Potensi Antibakteri serta Toksisitasnya
Authors: Suryati  , Yenuuar Thaharah Alifa Aziz , Fadhia Shafinna Hana , Ulia Rahmi Vika , Salsabilla Miftahul Melsya , Arifin Bustanul
Published: March 2023

Pucuk merah (Syzygium myrtifolium Walp.) is an ornamental plant from the Myrtaceae family. Several phytochemical tests from previous researchers reported that pucuk merah contains secondary metabolites that have benefits such as antioxidants, antibacterials, and anti-cancer. In addition, the distinctive aroma produced from pucuk merah  leaves indicates the presence of essential oils whose bioactivity can be studied. Still, there has been no report on this plant's chemical components or bioactivity. Therefore, this study aims to determine the content of chemical components of pucuk merah  essential oil and their bioactivity as antibacterial and toxicity. The isolation of essential oils was carried out by the hydro distillation method. The chemical components of essential oils were analyzed using the Gas Chromatography-Mass Spectrometry (GC-MS) method. GC-MS results showed the presence of 42 compounds with four main compounds, namely caryophyllene (23.45%), 3-carene (15.67%), α-terpineol (10.74%), and α-pinene (5.98%) ). Antibacterial test of pucuk merah  essential oil using the disc diffusion method showed strong activity against Staphylococcus aureus and Escherichia coli with inhibition zones of 16.15 ± 2.03 and 16.13 ± 1.74 mm at 100% concentration. The results of the toxicity test of pucuk merah  essential oil using the BSLT (Brine Shrimp Lethality Test) method on Artemia salina Leach shrimp larvae showed strong toxic properties with an LC50 value of 3.99 µg/mL.
Pengembangan Sensor Kimia Berbasis Kertas Untuk Penetapan Kadar Kafein Sampel Kopi
Authors: Hidayat Mochammad Amrun , Wahyuning Noviani Tri , Ningsih Indah Yulia , Kuswandi Bambang
Published: March 2023

The caffeine chemical sensor was developed by co-immobilizing sodium periodate (NaIO4), 3-methyl-2-benzothiazolinone hydrazone (MBTH), and acetic acid (CH3COOH) onto paper by using an adsorption technique. The addition of caffeine solution could change the color of the sensor from white to pale blue which can be then captured by using a flatbed scanner and quantified by the ImageJ program, known as a scanometric technique. Method validation such as linearity, LOD, LOQ, precision, and accuracy of the sensor was done by using caffeine standards. The result of caffeine analysis using the developed chemical sensor-scanometric method agreed with that of the spectrophotometric method, suggesting that the developed sensor with scanometric technique can be used as an alternative method for caffeine assay in coffee samples.
Introducción a la filosofía política
Authors: Grueso Vanegas Delfin Ignacio
Published: March 2023

El objetivo de este manual no es proveer un conocimiento completo de la filosofía política, sino señalar algunos de los conceptos, ideales y problemas que lo dinamizan. Cada una de las unidades que lo componen se centra en un tópico ético-político clave, lo desarrolla un poco, identifica la forma como ciertos autores, y a veces paradigmas políticos, se definen frente a él y termina con ciertas referencias donde el lector puede acudir para una mayor profundización. En este ordenamiento por unidades, en el que ciertos conceptos se van aclarando, o se van problematizando, es esencial cierto manejo de vocabulario técnico. Se estimulará la definición de los términos en uso.
And, at first, it was the research question… The PICO, PECO, SPIDER and FINER formats [Y, al principio, fue la pregunta de investigación … Los formatos PICO, PECO, SPIDER y FINER]

Authors: Sánchez-Martín Micaela , Pedreño Plana Marina , Ponce Gea Ana Isabel , Navarro-Mateu Fernando
Published: March 2023

El diseño de una pregunta de investigación clara y estructurada facilita el proceso de investigación y aumenta las probabilidades de éxito. Se comentan las características del formato PICO (P: Población de estudio o participantes; I: Intervención; C: Comparación; y O: el Resultado (Outcome, en inglés) esperado o efecto de la intervención) y de otras alternativas que se han propuesto posteriormente: PECO (Población, Exposición, Comparación, O-resultado), SPIDER (Sample-muestra, PI-Phenomenon of Interest- fenómeno de interés, Design-diseño, Evaluation- valuación y Research type o tipo de investigación) y FINER (Feasible-factible, Interesting-interesante, Novel-novedoso, Ethical-ético y Relevant-relevante). La enseñanza de estos formatos y su práctica en escenarios docentes facilitará su introducción entre los/as jóvenes investigadores/as.
The Idea of Social Justice in the Philosophy of Vladimir Solovyov
Authors: Ismailov Nurmagomed
Published: March 2023

The article examines the main provisions of the idea of social justice in the philosophy of the famous Russian philosopher Vladimir Solovyov. His interpretation of the idea of justice is studied in the context of his understanding of such concepts as morality, kindness, mercy, altruism, compassion, etc. It is emphasized that in his works V. Solovyov pays special attention to the question of the relationship and interdependence of justice and morality. A socially just and moral society is considered by him as a possible future. The idea of social justice in the philosophy of V. Solovyov is studied as an original teaching in the light of the enrichment of this problem. The author considers the views of V. Solovyov as a reflection of the realities of modern Solovyov society and tries to identify ideas in it that can be used in the implementation of social justice in the conditions of modern realities. The author explores the idea of justice in the philosophy of V. Solovyov in the context of the unity of all spheres of social life, causal and functional relationships, from the point of view of the relationship and interdependence of needs, interests, material and spiritual values. The interpretation of the idea of justice by V. Solovyov seems to the author interesting and original. This interpretation reflects the worldview of certain social strata of society and their wishes. His idea of justice has its absolute merits. The most interesting in the views of V. Solovyov is the provision according to which all the peoples of the world should have freedom of choice in terms of religion and religious orientation, proposals on the need for religious tolerance in society and in relations between peoples are interesting. The idea of social justice in V. Solovyov's philosophy requires further in-depth research in the context of current and subsequent social realities. At the same time, the author does not observe in the views of V. Solovyov the interrelation of the concepts of due and good, the interrelation of needs, interests and moral values.
A challenging recurrent thoracic disc herniation
Authors: Capece Mara , Corazzelli Giuseppe , Pizzuti Valentina , Leonetti Settimio , Innocenzi Gualtiero
Published: March 2023

Background:

Thoracic disc herniations are rare and occur at the rate of 1/1,000,000/year. Surgical approach must be individually tailored to the size, location, and consistency of the herniated disc. Notably, here, we report the unusual recurrence of a thoracic herniated disc.

Case Description:

In 2014, a 53-year-old female presented with thoracic back pain, and paraparesis, attributed to an magnetic resonance imaging/computed tomography (CT)-documented left paramedian T8–T9 calcific disc herniation. She underwent a left hemilaminectomy/costotrasversectomy following which she experienced complete regression of her symptoms. Notably, the postoperative radiological studies at that time demonstrated some residual although asymptomatic calcific disc herniation. Eight years later, she again presented, but now with the chief complaint of difficulty breathing. The new CT scan showed a new calcified herniated disc fragment superimposed on the previously documented residual disc. Through a posterolateral transfacet approach, she underwent resection of the disc complex. An intraoperative CT scan confirmed complete removal of the recurrent calcified disc herniation. Following the second surgery, the patient fully recovered and remains asymptomatic.

Conclusion:

A 53-year-old female first presented with a left-sided T8/T9 thoracic calcified disc herniation that was initially partially resected). When another larger fragment appeared 8 years later, superimposed on the previously documented residual disc, it was successfully removed through a posterolateral transfacet approach completed with CT guidance and neuronavigation.
Giant Tarlov Cyst presenting as pelvic mass: Often doing less is better
Authors: Mehan Abhishek , Ruchika FNU , Chaturvedi Jitender , Gupta Mohit , Venkataram Tejas , Goyal Nishant , Sharma Anil Kumar
Published: March 2023

Background:

Tarlov cysts are sacral perineural cysts arising between the peri and endoneurium of the posterior spinal nerve root at the Dorsal Root Ganglion and have a global prevalence rate of 4.27%. These are primarily asymptomatic (only 1% with symptoms) and typically arise in females between the ages of 50–60. Patients’ symptoms include radicular pain, sensory dysesthesias, urinary and/or bowel symptoms, and sexual dysfunction. Non-surgical management with lumbar cerebrospinal fluid drainage and computerized tomography-guided cyst aspiration typically provide only months of improvement before recurring. Surgical treatment includes a laminectomy, cyst, and/or nerve root decompression with fenestration of the cyst and/ or imbrication. Early surgery for large cysts provides the longest symptom-free periods.

Case Description:

A 30-year-old male presented with a very large magnetic resonance-documented Tarlov cyst (Nabors Type 2) arising from bilateral S2 nerve root sheaths with marked pelvic extension. Although he was initially treated with a S1, S2 laminectomy, closure of the dural defect, and excision/marsupialization of the cyst, he later required placement of a thecoperitoneal shunt (TP shunt).

Conclusion:

A 30-year-old male with large Nabors Type 2 Tarlov cyst arising from both S2 nerve root sheaths required a S1-S2 laminectomy, dural closure/marsupialization, and imbrication of the cyst, eventually followed by placement of a TP shunt.
Effects of High-Fat Feeding on Expression of Genes Regulating Fatty-1 Acid Metabolism in Hearts of Pregnant C57BL/6 Mice
Authors:   Department of Dietetics and Human Nutrition, University of Kentucky, USA., K Dudick , C Chen ,   Department of Dietetics and Human Nutrition, University of Kentucky, USA., R Shoemaker ,   Department of Dietetics and Human Nutrition, University of Kentucky, USA.
Published: March 2023

Cardiovascular complications in pregnancy increase risk for subsequent heart disease, suggesting adverse events during pregnancy may permanently alter maternal heart health. The heart undergoes physiologic hypertrophy with pregnancy, which is distinct from pathological remodeling associated with obesity. We previously demonstrated that C57BL/6 mice fed a high-fat diet, a model of diet-induced obesity, had attenuated cardiac hypertrophy with pregnancy compared to low-fat controls, associated concentric remodeling. Dual effects of pregnancy and obesity on cardiac metabolism during hypertrophy have not been studied. We investigated whether expression of genes regulating fatty acid metabolism in the heart were altered in pregnant mice fed a high-fat diet. The Nanostring Metabolic Pathways Panel and nCounter analysis system was used to quantify individual mRNA transcripts of genes regulating fatty acid metabolism from the left ventricles of pregnant and non-pregnant female C57BL/6 mice fed a high-fat or control low-fat diet. Pregnancy increased expression of genes regulating fatty acid transport (Cd36, Slc27a1, Cpt1b) and β-oxidation (Acaa2, Acadl, Acox1, Ehhadh, Mlycd), but the effect was observed in low-fat mice only. Increases in gene expression with high-fat feeding were pronounced in non-pregnant mice, but effects not additive with pregnancy. Further, three genes with functions related to energy metabolism (Glul, Mat2a, Ogdhl,) were increased in low fat–fed pregnant mice only. Obesity during pregnancy may “max out” cardiac fatty acid utilization through upregulation of transporters and oxidation of long-chain fatty acids, and also downregulate metabolic pathways essential to cardiac adaptation. These 48 results suggest pre-existing obesity could disrupt cardiac physiologic remodeling during pregnancy.
Basic principle from electrospray ionization to soft ionization mass spectrometry and development of ion source: part Ⅱ
Authors: Luo Jiehong
Published: March 2023

This paper continue talking about some questions in the experimental phenomenon and basic principle of soft ionization mass spectrometry, describe the forces between the charge and the analyte, ideal model of soft ionization technology, multi-charge and supercharging of proteins, mobility of gaseous ions in weak electric fields, the design of ion source and so on.
Interpretable attribution assignment for octanol-water partition coefficient
Authors: Yokogawa Daisuke , Suda Kayo
Published: March 2023

With the increasing development of machine learning models, their credibility has become an important issue. In chemistry, attribution assignment is gaining relevance in designing molecules and debugging models. However, attention has been paid to which atoms are important in the prediction without considering whether the attribution is reasonable. In this study, we developed a graph neural network model, a high interpretable attribution model in chemistry, and modified the integrated gradients method. The credibility of our approach was confirmed by predicting the octanol--water partition coefficient (logP) and evaluating the three metrics --accuracy, consistency, and stability-- in the attribution assignment.
Copper-Phosphido Catalysis: Enantioselective Addition of Phosphines to Cyclopropenes
Authors: Daniel Brian S. , Hou Xintong , Corio Stephanie A. , Weissman Lindsey M. , Dong Vy M. , Hirschi Jennifer S. , Nie Shaozhen
Published: March 2023

We describe a copper-catalyst that promotes the addition of phosphines to cyclopropenes at ambient temperature. A range of cyclopropylphosphines bearing different steric and electronic properties can now be accessed in high yields and enantioselectivities. A combined experimental and theoretical mechanistic study supports insertion of a Cu(I)-phosphido intermediate into the strained olefin. Density functional theory calculations reveal migratory insertion as the stereodetermining step of the pathway, with final product formation occurring via a syn-protodemetalation. Enrichment of phosphorus stereocenters is demonstrated via a DyKAT process.
Multiscale modeling of transferrins and bovine serum albumin adsorption on coated gold and silver nanoparticles: the role of coating density and protein’s glycosylation state.
Authors: Subbotina Julia , Rouse Ian , Lobaskin Vladimir
Published: March 2023

Polymer-coated nanoparticles are commonly used as drug carriers in nanomedicine. Their uptake rates are modulated by the interactions with essential serum proteins such as transferrin and albumin. Understanding the control parameters of these interactions is crucial for improving the efficiency of the nanocarriers. In this work, we perform a computational study of protein adsorption onto polymer (PEG) coated gold and silver nanoparticles. The applied approach yielded the protein-nanoparticle adsorption rankings onto coated as a function of PEG grafting density, which were validated against previously reported experimental protein-nanoparticle binding constants. The UnitedAtom multiscale method also provides information on the preferred orientation of selected proteins immobilised on the surface of nanoparticles (nano-docking). The presented approach can be helpful for experimentalists working on the development of biosensors, nanocarriers, or other nanoplatforms where information on the preferred orientation of protein is crucial. It can also be used for fast pre-screening of various combinations of proteins, nanoparticles, and coatings (in silico bio nano assays).
Life cycle comparison of industrial-scale lithium-ion battery recycling and mining supply chains
Authors: Machala Michael , Chen Xi , Bunke Samantha , Forbes Gregory , Yegizbay Akarys , de Chalendar Jacques , Azevedo Inês , Benson Sally , Tarpeh William
Published: March 2023

Recycling lithium-ion batteries (LIBs) can supplement existing supplies of critical materials and improve the environmental sustainability of LIB supply chains. In this work, environmental intensities (greenhouse gas emissions, water consumption, energy consumption) of industrial-scale production of battery-grade cathode materials from used LIBs are compared to the intensities of conventional mining supply chains. Refining mixed-stream LIBs into battery-grade materials reduces these environmental intensities by at least 55%. Electricity consumption is identified as the principal contributor to all LIB recycling environmental intensities, and different electricity sources can change greenhouse gas emissions up to eight times. Supply chain steps that precede refinement (material extraction and transport) contribute marginally to the environmental intensities of circular LIB supply chains (<5%), but are more significant in conventional supply chains (31%). This analysis disaggregates conventional and circular steps based on material extraction, transport, and industrial refinement operations to provide important insights for advancing sustainable LIB supply chains.
How farmland birds react to traffic noise?
Authors: Wiącek Jarosław
Published: March 2023

The effect of vehicle noise on farmland birds living in the vicinity of very busy roads was investigated. The study was conducted on two plots of crop fields located near national roads Nr. 12 and 19, the most important trunk roads in Poland and the eastern part of the Europe. The results of the current study are of wide relevance because crop fields are the dominant landscape type in both Poland and Europe. The conservation of the animals, including birds, living in such habitats is a priority issue in view of the strong pressure from human activities and the intensification of agriculture. The fieldwork was carried out in monthly from April to June 2020 and included counting birds in three rows of listening-observation points situated at 50, 150 and 250 m from the roads. At each observation point, all farmland and meadow birds seen and heard during a five-minute period were recorded, as was the maximum ambient noise level during this time. With increasing distance from the roads, the level of noise decreased while the number of individual birds and observed species increased. Most of the birds recorded, like skylark, lapwing, whinchat, yellowhammer, meadow pipit, pheasant, and common quail, avoided the vicinity of the roads. In contrast, the abundant yellow wagtail appeared to be insensitive to traffic noise and was evenly distributed over the two study plots. The roads and their associated traffic noise had a negative impact over a distance of about 100 m. At that distance, noise levels above 53–60 dB led to sharp falls in bird densities. Bird mortality due to collisions with vehicles was low because noise combined with the lack of attractive roadside habitats effectively deterred birds from the vicinity of the roads.
The get personal application to improve personal safety skills in children
Authors: Ekawati Yun Nina , Annisa Verdiantika , Saputra Nofrans Eka
Published: March 2023

Sexual crime comprises child sexual abuse, grouping, rape, or the torture of a person in a sexual manner. Recently, sexual crimes have posed a threat to children in Indonesia. This study aimed to determine the effectiveness of the Get Personal application in enhancing children's personal safety skills against sexual crime. A pre-post control group design was utilized with a quasi-experimental approach. Twenty-two elementary school pupils who participated in the study were split into experimental and control groups, with the experimental group receiving the Get Personal application treatment. The personal safety skills scale was utilized to obtain the pretest and posttest data. The data were analyzed by independent sample t-test and paired sample t-test. Significant differences were found in the results of personal safety skills in the pretest and posttest scores in the experimental group, while the control group didn’t indicate any difference. Following the paired t-test, individuals in the experimental group demonstrated a significant difference between the means of the pretest and posttest, with the posttest’s mean score being higher than the pretest’s mean score. Therefore, the Get Personal application improves children's personal safety skills and may apply to enhance personal safety skills among children.
“That was a real story. All of my stories are real”: Metamodernism and the Return to History in Twenty-first Century Gothic Fiction
Authors:   , Aziz Samira
Published: March 2023

This thesis focuses on the twenty-first century Gothic. Drawing on the construct of metamodernism, Timotheus Vermeulen and Robin van den Akker’s proposed term for the cultural paradigm of the twenty-first century, I investigate the ways that the contemporary Gothic has shifted in its engagement with history.

The Gothic has always problematized how the past is depicted and the accuracy orauthenticity of the historical record. In the later decades of the previous century, the Gothicfound an affinity with postmodernism in its preoccupation with cultural anxieties, fragmentedsubjectivity, and unreliable history. With the waning of postmodernism and the contemporaryinclination towards authenticity and realism, the Gothic has taken in these concerns as well,particularly in its engagement with history and the past. This shift is manifested in a number ofcontemporary Gothic novels, which I examine in my thesis. My primary texts are Gould’s Book ofFish (2001) by Richard Flanagan, The Historian (2005) by Elizabeth Kostova, Monsters ofTempleton (2008) by Lauren Groff, The Accursed (2013) by Joyce Carol Oates, The Incarnations(2014) by Susan Barker, The Night Ocean (2017) by Paul La Farge, and finally, Melmoth (2018) bySarah Perry. These novels show a strong concern about history and ethics. In its changingdepiction of the past, the metamodern Gothic helps us to understand the genre’s versatility – thatit supports historicity, hope, and progress.
Improvement of public spaces of industrial cities
Authors:   Timirâzevskaâ selʹskohozâjstvennaâ akademiâ, Malaya E.V.
Published: March 2023

The text of the training manual is devoted to the creation of project proposals and an explanatory note to urban planning practice after a course of lectures on the basics of urban planning. This practice is important for future landscape architects as the first real opportunity to improve the urban area, thanks to the knowledge gained. Students have the opportunity to explore urban structures and territories of public spaces, analyze the historical significance of the place and the urban situation, create interesting project proposals for the improvement of the selected territory and submit their project for discussion. The available examples demonstrate the stages of creating a landscaping project.
Тетрапиррольные макрогетероциклические соединения. Корреляции «структура - функциональные свойства»
Authors: Басова Т.В. , Белых Д.В. , Вашурин А.С. , Клямер Д.Д. , Койфман О.И. , Краснов П.О. , Ломова Т.Н. , Лоухина И.В. , Моторина Е.В. , Пахомов Г.Л. , Поляков М.С. , Семейкин А.С. , Стужин П.А. , Сухих А.С. , Травкин В.В.
Published: March 2023

В данном обзоре обобщены результаты исследований в области порфиринов, родственных соединений и их металлокомплексов с явно выраженным прикладным потенциалом, выполненных российскими учеными в последние 10-15 лет. Основное внимание сосредоточено на анализе взаимосвязи спектральных, каталитических и сенсорных свойств тетрапиррольных соединений со строением экваториального порфиринового и аксиальных лигандов и природой координирующего атома металла.
СТРУКТУРНЫЕ ОСОБЕННОСТИ КОМПЛЕКСОВ [Co(dppaPh)2(CH3CN)2](BF4)2 И [Co(dppaPh)2(η1-P4)]BF4, ГДЕ dppaPh - N,N-БИС(ДИФЕНИЛФОСФИНО)АНИЛИН
Authors: Кучкаев Айрат М. , Кучкаев Айдар М. , Иванов А.С. , Сухов А.В. , Добрынин А.Б. , Синяшин О.Г. , Яхваров Д.Г.
Published: March 2023

Синтезирован и структурно охарактеризован новый комплекс кобальта [Co(dppaPh)2(CH3CN)2](BF4)2 (1), где dppaPh = N,N-бис(дифенилфосфино)анилин, и выявлены его структурные особенности по сравнению с описанным ранее комплексом [Co(dppaPh)2(η1-P4)]BF4, содержащим η1-координированную молекулу белого фосфора в координационной сфере. Установлена роль растворителя в процессе кристаллизации комплекса 1: проведение реакции в CH3CN приводит к образованию стабильного октаэдрического комплекса, в котором реализуется координация двух молекул растворителя в аксиальных положениях.
Mpox outbreak in the Netherlands, 2022: public health response, characteristics of the first 1,000 cases and protection of the first-generation smallpox vaccine
Authors: van Ewijk Catharina E , Miura Fuminari , van Rijckevorsel Gini , de Vries Henry JC , Welkers Matthijs RA , van den Berg Oda E , Friesema Ingrid HM , van den Berg Patrick R , Dalhuisen Thomas , Wallinga Jacco , Brandwagt Diederik , van Cleef Brigitte AGL , Vennema Harry , Voordouw Bettie , Koopmans Marion , van der Eijk Annemiek A , Swaan Corien M , te Wierik Margreet JM , Leenstra Tjalling , Op de Coul Eline , Franz Eelco ,   the Dutch Mpox Response Team
Published: March 2023

In early May 2022, a global outbreak of mpox started among persons without travel history to regions known to be enzootic for monkeypox virus (MPXV). On 8 August 2022, the Netherlands reported its 1,000th mpox case, representing a cumulative incidence of 55 per million population, one of the highest cumulative incidences worldwide. We describe characteristics of the first 1,000 mpox cases in the Netherlands, reported between 20 May and 8 August 2022, within the context of the public health response. These cases were predominantly men who have sex with men aged 31–45 years. The vast majority of infections were acquired through sexual contact with casual partners in private or recreational settings including LGBTQIA+ venues in the Netherlands. This indicates that, although some larger upsurges occurred from point-source and/or travel-related events, the outbreak was mainly characterised by sustained transmission within the Netherlands. In addition, we estimated the protective effect of first-generation smallpox vaccine against moderate/severe mpox and found a vaccine effectiveness of 58% (95% CI: 17–78%), suggesting moderate protection against moderate/severe mpox symptoms on top of any possible protection by this vaccine against MPXV infection and disease. Communication with and supporting the at-risk population in following mitigation measures remains essential.
STRANGE SCHOOL FOR STRANGE HEROES. TRANSFORMING ORDINARY SPACE IN “THE SCHOOL NURSE FILES” TV SERIES
Authors:   Russian State University for the Humanities, Tarasova Aleksandra V.
Published: March 2023

The article analyzes the South Korean TV series in the genre of “fantasy” as a holistic text in order to identify the features of the construction of the space in which the action takes place. The popularity of series produced in the Republic of Korea is undeniable, as is their popularity with foreign audiences. However, not only the phenomenon of popularity itself and not only the reception of South Korean TV series abroad can be the subject of consideration in a humanitarian study. The construction of the narrative, the types of characters, the established standards and deviations from them – all that also represents a very promising material for analysis. Streaming services are increasingly becoming co-producers or sole producers of new series, among which Netflix stands out in particular. TV series created for exclusive demonstration on the Netflix platform are aimed not only at the domestic Korean audience, but also at the global one, therefore, from such series one can expect both tracing of global examples of the genre and bold experiments with South Korean standards. And the technical capabilities provided by Netflix allow the series in the fantasy genre to realize the rather complex ideas of the show’s creators. And the 2020 series “The School Nurse Files” very promising example of a South Korean fantasy TV series made for the Netflix platform.
THE BIRTH OF ANCIENT POLITICAL PAMPHLET. STESIMBROTUS OF THASOS
Authors:   Institute of World History, Russian Academy of Sciences, Surikov Igor E. ,   Russian State University for the Humanities
Published: March 2023

The genre of political pamphlet, which reached a high flourishing in Greece in the 4th century B.C. (Isocrates and others), appeared in the previous century. Usually scholars begin its history from the “Athenian Constitution” of Pseudo-Xenophon (420s B.C.). However, the article deals with an earlier (evidently, simply the earliest) pamphleteer, Stesimbrotus of Thasos, who wrote in the time of Pericles. His fragmentarily preserved treatise “On Themistocles, Thucydides and Pericles” represented a very lively written tendentious pamphlet (of mainly invective a tone) with some features of memoirs. The article analyzes biographical testimonies on Stesimbrotus and extant fragments of his principal work. As it represents leaders of radical democracy, Themistocles and Pericles, in negative light, but Cimon, a statesman from the opposite camp, is represented in it more positively, the author makes a conclusion on generally antidemocratic political orientation of the pamphlet, and that corresponds with the prevalent position of Greek intellectuals if the period in question.
Direct methods for modeling vehicle traffic in the surrounding of a reinforced slope
Authors: Panasiuk Leonid , Tyurina Vasilina
Published: March 2023

The dynamic impact of moving vehicles can cause effects leading to landslide processes in slopes. Even insignificant displacements and speeds lead to a relative displacement of the layers. In this case, the physical and mechanical parameters of the soils that make up the slope can change significantly. For example, the decrease in adhesion C may be analogous to the decrease in the force of static friction by the transition to sliding friction. This is due to the fact that the mutual movement leads to slippage of small soil fragments relative to each other. The influence of vehicles on possible landslide processes increases with an obvious tendency to increase the speed and mass of the rolling stock. This, as well as the complex geological structure of the slopes and the need to take into account the reinforcing structures, leads to the need to build refined mechanical and mathematical models for the joint operation of road structures, the slope and the reinforcing structures in a dynamic formulation.

The creation of a refined model of the slope geometry, the highway and the slope reinforcement structures are today solved mainly by the finite element method (FEM). The problem of constructing a numerical solution of such problems based on direct methods of integrating the equations of motion is topical. In this case, it is necessary to take into account the change in the distribution of masses when moving vehicles along the road at different speeds.

In any of works of the author [1-6], an explicit absolutely stable scheme for integrating the equations of motion of the FEM was used to solve this problem.

This article considers testing of the method by comparing numerical solutions with known ones for problems that are simpler in terms of topological structure. Namely, the comparison of the method with the solutions of the classical problem "movement of a massive load along a massive beam" was carried out. V.V. Bolotin's solution [7-9] was adopted as a "reference" one. Numerical solutions showed a high degree of convergence of results by the proposed and "reference" methods.
Linear displacement sensor for monitoring engineering structures of buildings and structures
Authors: Evtushenko Sergej , Kuchumov Mikhail
Published: March 2023

The article provides an analysis of techniques and devices used in monitoring and evaluating the parameters of the stress-strain state of load-bearing structures of buildings and structures. The prototype and the principle of operation of converters for measuring linear displacements under dynamic loads are described. The description of a new innovative linear sensor developed on the basis of an "electro-chemical converter" is given. At the end of the article, the tasks and directions of further research are given.
Spatial and technological structure of individual technological processes during repair facades and roofs
Authors: Antoniadi Valeriia , Antoniadi Diana
Published: March 2023

Today a regional program of capital repairs of common property in apartment buildings is being implemented, which is accompanied by the need to find new ways and technologies for performing work at the lowest cost, identifying reserves and parameters that have a direct impact on improving the efficiency of the manufacturability of the repair of common property of apartment buildings. The article discusses these solutions to improve efficiency based on the method of constructing the spatial and technological structure of individual technological processes consisting of several operations on the example of the repair of facades and roofs of an apartment building.
Optimization of compressed wooden bars of variable section according to the criterion of maximum critical load
Authors: Shorstov Roman , Yazyev Serdar , Chepurnenko Anton
Published: March 2023

The article presents a numerical and analytical solution to the problem of optimizing compressed rods according to the criterion of the maximum critical load with a possible loss of stability in two planes. We consider a wooden bar of rectangular cross section, the height of which varies according to a linear law, and the width is constant. The calculation is performed in an elastic formulation. A constraint on the constancy of the rod mass is introduced. Variable parameters are the ratio of the minimum section height to the maximum, as well as the ratio of the section width to the maximum height. Numerical search for the optimal solution is performed in the MATLAB environment using the method of sequential quadratic programming. It has been established that the use of rods with a cross-sectional height that varies linearly along the length is effective only if the rod is fixed in at least one of the planes according to the “pinched-free end” scheme. It has been established that the increase in the critical load when using rods with a linearly varying cross-sectional height can be up to 22%.
Scientific methodology for compiling a dam passport during its life cycle based on engineering surveying and geodetic monitoring
Authors: Haydar A. , Zheleznov Maksim
Published: March 2023

The public and property risks associated with dam failures are very high, due to the location of settlements in areas of potential flooding, as well as the construction of new dams in less than ideal areas (in far from ideal territories).

Due to the variety of risks that threaten dam structures and their surroundings, it is necessary to identify the possible causes and consequences of dam failure, and then develop a program to improve its safety. The monitoring of dam behavior/performance needs to start from the first days of construction and continue throughout the life cycle.

The conducted study suggests a scientific methodology for the preparation of annual dam passports, which should contain all the data and information obtained from the date of the dam's creation until the issuance of the passport. The study also makes recommendations on the types of data and information that should be included in the dam passport, which will enable workers and experts in the field of dam life cycle monitoring, as well as responsible persons, to take the necessary measures and proactively resolve any problems that exist or may occur.
Towards Improved Quality and Accuracy of Deeper Target Images on Land Data
Authors: Mokhtar A.
Published: March 2023

Even with all the technological advancements today, imaging the fractured basement in onshore datasets remains challenging. There are several factors contributing to the complexity, such as erratic topography that introduces static errors, unconsolidated surfaces that absorb the emitted energy and prevent it from propagating through the subsurface, several high amplitude hard surfaces that create interbed multiples throughout the section, and the presence of shallow gas pockets that introduce unnatural sagging. On top of these geological heterogeneities of overburden, imaging the fractured basement in onshore data suffers from sparsity of seismic acquisition due to limitations in land accessibility; this issue is absent in offshore seismic surveys. The success of imaging the onshore fractured basement largely depends on the detailed work of seismic data preconditioning and the velocity model building conducted by an experienced team. This paper showcases a case study of seismic processing and imaging of land data with a deep target, including the fractured basement target. Firstly, analysis was done on the legacy dataset to highlight the imaging ambiguity, and secondly, a solution was proposed for a systematic and sequential workflow of seismic reprocessing. The findings and observations of the seismic processing products are shared in this paper.
A New Discovery in The Limau Graben Trend: Air Benakat Formation Shallow Gas
Authors: Santoso W.D.
Published: March 2023

Many hydrocarbon fields in the Limau Graben trend were produced in the 1950s. That fields are mostly produced in the Talangakar Formation and Baturaja Formation. To maintain the continuity of production, the discovery of new reservoirs is a target that must be carried out in the subsurface analysis. Air Benakat Formation becomes a discovery that shows good results. Air Benakat Sand is characterized by thin sand 2 – 5 meters funnel log pattern, silt to very fine sand grain deposited in the shallow marine based on core analysis. The resistivity is 1.5 – 4 ohms, showing a low resistivity reservoir caused by high laminated clay content and conductive minerals. In order to understand the distribution of Air Benakat Sand, RMS amplitude was extracted from seismic data, and combined with the fault interpretation. Fault bounded area with high RMS amplitude (up to 6), and resistivity of 1 – 4 ohms were selected for the candidates of new well perforation and step out. The result of the well testing in the selected well reveals a gas flow rate of 1.2 – 2.4 MMSCFD and an oil flow rate of 64 – 160 BOPD.
Impact of High-Performance Water Based Mud (HPWBM) Usage to Geological Data Acquisition: Case Study Suban Field South Sumatra
Authors: Permana B.R.
Published: March 2023

Thick shaley overburden sections such as the Telisa Formation are one of the main challenges for drilling wells in the Suban Field. Prior 2012, water-based mud (WBM) was used to drill this formation, with KCl additive, resulting in low rate of penetration (ROP) and shale stability issues which requiring several bits run to successfully drill the section. Subsequently, starting 2015 synthetic oil-based mud (SOBM) was used in drilling campaign to improve drilling performance. However, the costs of SOBM are high and cuttings handling is more environmentally risky. For continuous improvement, a high-performance water-based mud (HPWBM) was designed to have a better drilling performance at lower cost and is more environmentally friendly. Several HPWBM laboratory tests were conducted by utilizing shale cuttings from several Suban wells. In general, the clays mineralogy in Suban overburden sections are predominated by kaolinite and illite. Consequently, the HPWBM formula need to be designed to handle the behavior of the clay minerals that tend to be dispersed. Based on lab results, NaCl, KCL and Polyamine need to be added to the HPWBM system. With HPWBM, the drilling ROP was predicted to have better performance than WBM but less than SOBM. This ROP prediction was used to design real-time logging data transmission while drilling (LWD). During drilling execution, the actual ROP exceeded the prediction. However, this high ROP resulted in intermittent real-time data transmission. Therefore, real-time LWD data selection needs to be carefully adjusted for the next sections. The use of HPWBM is also impacting the quality of gas readings that experienced distortion due to absorption. The absorption is caused by chemical components in HPWBM increases as the carbon component in hydrocarbon gas increases. However, the magnitude of absorption is lower than absorption in SOBM. Thus, interpreting gas logs should be done with caution.
Characteristics of Eocene Carbonate Reservoir – A Case Study of Ngimbang Carbonate in North Madura Platform, East Java Basin.
Authors: Darmawan H.I.
Published: March 2023

Exploration in the East Java Basin began in 1888 when first discovery was found in the Kuti field from the Lidah play. Fast forward to 2022, there has been a total of 143 discoveries accumulating to total resources of at least 2.2 Bbl oil and 13 TCF gas from more than 600 exploration wells drilled in the basin. More than half of the resources are contributed by the Kujung Play. As Kujung exploration matured, other exploration started to focus on the deeper plays such as the Eocene Ngimbang Carbonate, an underexplored play with sizeable potential. A newly drilled well in North Madura Platform well has succeeded to prove that Ngimbang carbonate contains excellent porosity and permeability as shown by the well test result and the total loss experienced during drilling. Cased hole logging results further proved the high porosity of the carbonate with values of up to 25-30%. Seismic analysis and well data analysis show that the Ngimbang carbonate experienced 3 stages of carbonate growth; Stage 1 – Initiation Phase, Stage 2 – Aggradation Phase, and Stage 3- Backstepping Phase. Based on the well log and petrography thin section analysis, the secondary porosity in Ngimbang carbonate was caused by intensive dissolution-karstification related to subaerial exposure and fracturing and dissolution due to the later diagenesis phase. The secondary porosity developed varies depending on the depositional environment setting and carbonate growth phase, with average of 10-15% porosity range within the shelf-edge to shelf depositional environment, and average of 20-25% (up to 35% max) on the distal isolated carbonate. The unique intense karstification in the isolated carbonate was contributed by tectonic subsidence rate variation which fluctuated the accommodation space formed, and global sea level falls and eustatic fluctuations during the Eocene-Oligocene periods which further promoted major subaerial exposures and contributed to the episodic karstification and secondary porosity generation.
Revealed Banyu Urip New Opportunity: Integrated Subsurface Approach Leads to a Potential Field Production Increase Through Infill Wells Program
Authors: Sulistyaningrum I.
Published: March 2023

Natural declining of oil and gas fields are inherent. It also occurs in the Banyu Urip field. Banyu Urip has been producing since 2009. The field has produced more than 540 million barrel oil (MMBO) with peak production around 220,000 barrel oil per day (BOPD) in 2021, currently producing about 170,000 BOPD. The field’s decline is observed from increasing gas to oil ratio (GOR) and water cut in almost all of the producer wells. The aim of this paper is to describe our efforts to offset Banyu Urip’s production decline by developing a new infill drilling program which has been characterized through an integrated approach by incorporating available static and updated dynamic data. Banyu Urip has a luxury set of subsurface data which we use to support the reservoir characterization and field performance analysis. Static and dynamic data, including production data and hydrocarbon contact monitoring are acquired regularly. In 2017, seismic data reprocessing was conducted with recent technology to improve data quality for better structural and stratigraphic interpretation. Integrating all of the available data with new interpretations and insights provided a better understanding of gross rock volume, reservoir characterization, fluid contact movement, subsurface risks uncertainties, and hydrocarbon volumes. Ultimately, improved geologic and reservoir simulation models were constructed that lead to identification of potential un-swept oil in the Banyu Urip carbonate reservoir area. Mining the existing data and applying new insights regarding subsurface evaluation and reservoir performance analysis resulted in new opportunity identification. The un-swept oil potential is identified mainly in the eastern and western areas. Several infill wells are planned to be drilled in late 2024 onwards which could generate incremental oil production to offset current decline and support national oil production.
Artificial Intelligence (AI) Based Personnel Protective Equipment (PPE) Monitoring – Case Study in Rokan Drilling Operation
Authors: Rizki F.F.
Published: March 2023

Automatic Personal Protective Equipment (PPE) Monitoring System is a term for an image processing method which is used to identify compliance to PPE utilization practices by personnel on the field. The vast diversity and assortment of PPEs across companies make it quite challenging to take existing limited public dataset models from other companies and apply them directly to specific companies such as Pertamina Hulu Rokan. As a state-owned company that operates one of the largest fields in Indonesia with an extensive drilling program, Pertamina Hulu Rokan decided to use an Automatic PPE monitoring system with online Closed-Circuit Television (CCTV) units to enable recognition of PPE objects in drilling operations by the implementation of Artificial Intelligence. As a first step towards building this system, we proposed to build PPE datasets from various Rig areas and in different light conditions. The next step was to use deep learning technology such as Yolov4 and train the model using the PPE datasets to localize PPE objects used by personnel such as gloves, gloves-off, helmets, helmets-off, shoes, shoes-off, masks, masks-off, glasses, glasses-off. Our Preliminary results indicate that our method has been useful to identify compliance of PPE usage during operation work and to minimize the safety risk exposure of our personnel.
Seismic Enhancement Resolution in Penobscot Field With Short-Time Fourier Transform Half Cepstrum Method
Authors: Askari T.B
Published: March 2023

Limited resolution of seismic data is a common issue encountered in exploration, especially in zones with a thickness below the tuning thickness. Seismic signal processing by widening the frequency bandwidth can increase seismic resolution. This research was conducted on Penobscot 3D seismic, Nova Scotia, using the Short-Time Fourier Transform Half Cepstrum (STFTHC) algorithm, which can widen frequency bandwidth. This method uses a Gaussian window to take signal chunks then combines the advantages of STFT and Cepstrum to get a broader frequency spectrum. Window’s parameters is crucial particularly ensuring the signal chunk could be considered as a stationary signal and also to avoid spectral leakage; in this study, a Gaussian window with a window length of 16, α value of 4 was selected and hop size a quarter of the window length used. The application of the STFTHC algorithm on 3D Penobscot seismic data successfully increased seismic resolution, therefore most of the layers that was once interfered each other could be separated at targeted formation in Penobscot Field. After STFTHC process the layer became quite well resolved. The increase of seismic resolution could be seen in the improvement of tuning thickness from 74,382 m to 52,135 m. The use of enhanced seismic data also improved well seismic tie correlation from 0.844 to 0.805.