bluuebunny/crossref_metadata_2025 huggingface dataset:
Experiencing psychological trauma as a source of value self-determination of adolescents
Authors:   Krasnoyarsk State Pedagogical University named after V.  P. Astafiev, Yakovleva N.F.
Published: October 2022

Th e value self-determination of adolescents is a process of self-organization, balancing on the edge of chaos fi lled with attractors. Pedagogical support of value self-determination is a resonance excitation of the system in a state of chaos (psychological trauma). Pedagogical infl uence at the point of bifurcation causes the “attraction” of positive attractors, the formation of new value structures.
Oxytocin effects on the behavior in historical and experimental domesticated animals
Authors:   Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, Herbeck Yu.E. , Malyavko A.A. ,   Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences;, Shepeleva D.V. ,   Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences;
Published: October 2022

Domestication is one of the important evolutionary and genetic problems of biology. It addresses fundamental evolution aspects as well as allows us to study mechanisms of aggression, pro-social behavior and anthropogenesis. One of the potential key mechanisms of domestication may be associated with the central oxytocin (OT) system. OT has been repeatedly shown to exhibit pro-social and anxiolytic eff ects rodents, dogs, humans and other species [1]. In our study, we used intranasal OT administration on Siberian tame foxes and non-selected one. It is well-known experimental domestication model of. Th e OT eff ect on behavior had been investigated in intermale interactions (triple cage aft er adaptation) and human contact (new enclosure). OT administration increased patterns of playful (crouches on paws), affi liative (friendly) behavior, motor (fast move) and mixed activity in male-to-male interactions in tame foxes, whereas in case of unselected foxes, OT administration increased behavior patterns associated with anxiety (latent time for home cage exit, freezing, total time in home cage). In fox-human interactions, OT administration had the greatest eff ect on increasing the time tamed fox stayed at less than a meter away from a human. It is this parameter that is the defi ning one in similar tests on dogs. Th e results allow to suggest that OT has a context-dependent eff ect rather than explicitly pro-social eff ect in the tests, therefore amplifying the perception of social conditions according to the social salience hypothesis of OT. OT eff ect is associated with emotional positive and negative animal behaviors toward human that could be related to the genotype. Such OT eff ect might separate animals into more or less tolerant to humans under the same early domestication conditions.
The phenomenon of rejection of poverty status among people with higher education
Authors:   Siberian federal university, Goryacheva O.P. , Nikitina N.A. ,   Siberian federal university
Published: October 2022

Abstracts of the report on the study of the standard of living of students in the period 2018-2021. The study revealed mental problems of rejection of poverty among people with higher education. This phenomenon should be taken into account when forming the design of social research.
The role of the urokinase system in colorectal carcinogenesis
Authors:   Lomonosov Moscow State University, Garmanova T.N. , Krivonosova D.A. ,   Lomonosov Moscow State University, Agapov M.A. ,   Lomonosov Moscow State University, Semina E.V. ,   Lomonosov Moscow State University, Galliamov E.A. ,   Sechenovsky Institute of Clinical Medicine University, Markaryan D.R. ,   Lomonosov Moscow State University, Kakotkin V.V. ,   Moscow State University Medical Center. M. V. Lomonosov
Published: October 2022

The aim of the research. A systematic review of data published in recent years on the urokinase system, its role in carcinogenesis at the cellular level with an emphasis on the carcinogenesis of colorectal cancer. Material and methods. The research was compiled based on Russian and English publications from the Medline and E-library databases dated 2015 to 2021 using the following keywords: “urokinase” AND “cancer”, “urokinase” AND “colorectal”, “urokinase” AND “biomarker” in the Title and Abstract fields. Out of the references found, a total of 59 publications were included in this review. Results. The urokinase system is involved in many processes of carcinogenesis: from degradation of the extracellular matrix and tumour metastasis to proliferation and apoptosis suppression in tumour cells. Th e search for new biomarkers for diagnosis, assessment of progression and prognosis of colorectal cancer is of great interest due to the imperfection, economic ineffi ciency and laboriousness of other methods for diagnosing this disease. In addition, such markers may be not merely diagnostically signifi cant agents, but also objects for targeted antitumor therapy. Urokinase and its receptor act as a potential new biomarker for screening, diagnosis and predicting the progression of colorectal cancer. In future, they may replace the CEA and CA19-9 levels proven to be non-significant. Conclusion. In recent years, many discoveries have been made in this area. However, obtaining of diagnostically signifi cant results and safe application of targeted therapy require further research.
Sarcopenia and cognitive impairment in patients with chronic kidney disease
Authors:   Kemerovo State Medical University, Fomina N.V. , Utkina E.V. ,   Kemerovo State Medical University
Published: October 2022

The growing number of elderly and senile people in the total population remains one of the most important demographic problems of the modern society. The population aging entails an increase in patients with chronic kidney disease (CKD). The paper presents a review of the current literature on sarcopenia and cognitive impairment in CKD patients. The search was performed in PubMed and e-LIBRARY databases among papers published between 1996 and 2021. The search was carried out using the keywords “sarcopenia”, “cognitive impairment”, “chronic kidney disease”, “population aging”, “glomerular filtration rate”. With increasing age, the prevalence of sarcopenia grows (60-70 years – 5-13 %; over 80 years old – from 11 to 50 %). Against the background of CKD progression, the incidence of sarcopenia increases by 45%. Sarcopenia and cognitive impairment in patients with CKD are interrelated through common pathophysiological development mechanisms.
Cognitive impairments and COVID-19
Authors:   Prof. V. F. Voino-Yasenetsky Krasnoyarsk State Medical University, Kabysh S.S. , Karpenkova A.D. ,   Prof. V. F. Voino-Yasenetsky Krasnoyarsk State Medical University, Prokopenko S.V. ,   Prof. V. F. Voino-Yasenetsky Krasnoyarsk State Medical University
Published: October 2022

Cognitive dysfunction is one of the manifestations of the neurological complications in coronavirus infection. In this article, we have collected material on the state of cognitive functions aft er suff ering a coronavirus infection with aspects of possible pathogenetic mechanisms and a discussion on the prospects for treatment and rehabilitation. The COVID-19 pandemic, having manifested itself in December 2019, remains one of the most controversial topics in the world to the day. Th e growing number of reports about damage to the nervous system during coronavirus infection suggests that the virus is neurotropic. In the clinical picture of the disease, less attention is paid to such symptoms as severe weakness, fatigue, memory impairment. At the same time, it is this symptomatology that most oft en accompanies patients in the postcovid period and signifi cantly reduces their quality of life, thereby making it difficult to adapt to social and work activities. Th e search was conducted for literatures published within the period from 2020 to the third quarter of 2021, domestic and foreign sources from the Web of Science, PubMed databases were analysed. The search queries were the following ones: “COVID-19”, “cognitive impairment”, “postcovid syndrome”.
Phenotypes of chronic heart failure in patients with rheumatoid arthritis depending on the type of basic anti-inflammatory therapy
Authors:   Irkutsk State Medical University, Ankudinov A.S. , Kalyagin A.N. ,   Irkutsk State Medical University
Published: October 2022

The aim of the research. Determination of the features in the course of chronic heart failure (CHF) against the background of rheumatoid arthritis (RA) through comparative analysis of laboratory-instrumental and clinical indicators of the course of CHF in patients with and without RA, as well as the search for possible associations between basic anti-infl ammatory therapy and the studied parameters. Material and methods. A total of 256 patients participated in the study (all study participants were female): the study group included 134 CHF patients with RA. The comparison group included 122 CHF patients without RA. Th e functional class of CHF in the study groups according to NYHA was I-II. The diagnosis of CHF was established on the basis of modern ESC and RСS criteria. The diagnosis of RA was confirmed using laboratory and instrumental criteria. A comparative assessment of clinical and laboratory parameters in the examined groups was carried out. The analysis of possible associations between basic anti-infl ammatory therapy of RA and the RA course indicators was carried out. Th e paper presents statistically reliable results. Data processing was carried out using the Statistica 10.0 program. The level of significance when testing statistical hypotheses was set at p<0.05. Results. The study revealed statistically signifi cant predominance of the E/e› value in the group of CHF patients with RA in comparison to the patients without RA. The level of NT-proBNP in the group of CHF patients with RA had signifi cantly lower values in comparison to patients without RA. In CHF patients with RA taking lefl unomide, the level of NT-proBNP had no statistically signifi cant diff erences in comparison to CHF patients without RA. In the group of CHF patients with RA, a statistically signifi cant inverse association between methotrexate dosage with the E/e’ and NT-proBNP parameters was found. Conclusion. The intake of 15 mg / day methotrexate may have a positive eff ect on such parameters as E / e› and NT-proBNP in CHF patients with RA. However, prospective studies are required to confirm this hypothesis.
The cytokine level in exhaled breath condensate and cytokine genes polymorphism in children with bronchial asthma
Authors:   Research Institute of Medical Problems of the North, Malinchik M.A. , Gorbacheva N.N. ,   Research Institute of Medical Problems of the North, Belenjuk V.D. ,   Research Institute of Medical Problems of the North, Konopleva O.S. ,   Research Institute of Medical Problems of the North, Smolnikova M.V. ,   Research Institute of Medical Problems of the North
Published: October 2022

The aim of the research. To assess the levels of cytokines characterising the balance of Th 1 / Th 2 / Th 17 lymphocytes in the expired breath condensate, as well as to study the role of polymorphic variants of these cytokine genes in Krasnoyarsk children with bronchial asthma (BA), depending on the severity and of the disease control level. Material and methods. The study group included 104 BA children and 65 children without bronchopulmonary and allergic diseases in medical history. The diagnosis, severity and disease control level were established in accordance with the recommendations by the GINA working group. Children were divided into groups depending on the severity and BA control level. Research material was considered to be the expired breath condensate (EBC) and DNA from peripheral blood. DNA isolation was carried out by the sorbent method, and genotyping was performed by the real-time PCR method. EBC was collected using the RTube Exhaler Breath Condensate Collector. Th e concentration of cytokines in native EBC samples was determined using the MagPix multiplex immunoassay system. The results were processed using the Statistica soft ware package for Windows 10.0 and Microsoft Excel, 2007. The allele and genotype frequencies were compared with both an online calculator and the χ-square test. An odds ratio (OR) with a 95 % confi dence interval (CI) was carried out to associate the genetic markers with pathology phenotypes. Results. When comparing the genotype and allele frequencies of IL13 rs1800925 polymorphism in BA and control groups, we demonstrated a statistically significant difference for the CC genotype and the T allele. In addition, the prevalence of genotype AA IL17A rs2275913 was found to be higher in the group with controlled ВА, as well as in the group with medium ВА severity. Th ere were no statistically signifi cant diff erences in the polymorphisms IL4 rs2243250, IL5 rs2069812, IFNγ rs2069705 between the patient groups and controls. When determined the concentration of cytokines in EBC, only trace amounts of the analytes under study were revealed. The concentration values for the IL-13, IL-17A and IL-4 cytokines were slightly above the sensitivity threshold of the method and the kit used. IFN-γ and IL-5 were detected only in two patients. Conclusion. No association of polymorphic genes with cytokine concentration levels in the expired breath condensate was found in the study
Predictors of a decrease in the quality of life of patients with senile asthenia syndrome and paroxysmal atrial fibrillation
Authors:   Penza State University, Petrov M.V. , Belugina T.N. ,   Penza State University, Burmistrova L.F. ,   Penza State University, Melnikova L.V. ,   Penza State University
Published: October 2022

The aim of the research. To determine the predictors of a decrease in the quality of life of patients with the senile asthenia syndrome and paroxysmal atrial fibrillation. Material and methods. A total of 45 patients aged over 65 with paroxysmal atrial fi brillation (AF) and senile asthenia (SA) syndrome were selected and constituted the main group. A control group of 43 apparently healthy individuals was formed as well. Th e search for predictors of a decrease in the quality of life (QoL) in patients with SA syndrome and paroxysmal AF was carried out based on standardised laboratory and instrumental studies. Results. Th e QoL of patients with SA syndrome and paroxysmal AF is declined according to indicators relevant for apparently healthy individuals comparable in age and gender characteristics. In comparison to men, women have demonstrated a decrease of the QoL according to three of the four scales of physical health: PF, RP, GH, and on two scales of psychosocial health: RE and MH. In the age group of subject aged over 75, mainly the indicators of physical status – PF, RP and GH – were reduced. With GFR lowering to less than 60 ml/min, there is predominantly a decline in the physical aspect of the QoL as well as a decrease in vital activity. Deterioration in the QoL was determined on two scales of the physical aspect of health – PF and RP – against the background of HR higher than 80 bpm, while no changes in the psychosocial aspect were diagnosed. Conclusion. The quality of life of patients with the senile asthenia syndrome and paroxysmal AF has the worst values on absolutely all scales of the physical aspect of health, whereas the psychosocial sphere is less involved and only vital activity and role-based emotional functioning are reduced. Predictors of QoL deterioration in patients with the SA syndrome and paroxysmal AF are: the age of 75 or older, the female gender, a decrease in GFR down to 60 ml/min and an increase in the heart rate to over 80 bpm. Thus, rational nephroprotective therapy and heart rate control contribute to the improvement in the quality of life of patients with the SA syndrome and paroxysmal AF.
Saliva as an indicator of mental and physical stress
Authors:   Siberian Federal University, Stepanova L.V. , Kratasyuk V.A. ,   Siberian Federal University, Kolenchukova O.A. ,   Research Institute of Medical Problems of the North, Zhukova G.V. ,   Siberian Federal University, Ryzhikova E.M. ,   Surgut State University
Published: October 2022

Th e aim of the research was to evaluate the possibilities of using saliva as an indicator of mental and physical stress in the bioluminescent method. Material and methods. Th e object of the study was the saliva of schoolchildren (15-16 years old, n=15), students (19-20 years old, Krasnoyarsk State Medical University and Surgut State University, n=227) and athletes (19-20 years old, n=25). Saliva sampling was performed before and aft er muscle tension and psycho-emotional stress. Th e bacterial bioenzyme system NADH:FMN-oxidoreductase + luciferase was used as a test system. Th e residual glow intensity was used as an integral indicator of body fatigue [1, 2]. Results. It shows the greatest fatigue of schoolchildren aft er mental stress and the least fatigue aft er physical exertion. Boys got tired aft er physical exertion, girls aft er mental exertion. Physical activity tired the excellent schoolchildren. Mental stress caused fatigue of the good schoolchildren. Th e fatigue of students during the study session was revealed, regardless of the region of residence and the component composition of saliva. Students had the same index of stress resistance regardless of the state of rest or mental stress. Indicators of situational and personal anxiety were higher among students from the northern regions. For the fi rst time, the least fatigue of highly qualifi ed athletes was shown during high-intensity physical activity, which distinguishes them from low-skilled athletes. Th e concentration of lactate in the saliva of athletes increased with fatigue. Conclusion. Mental and physical overload aff ect schoolchildren regardless of their academic performance and length of study. Psychological or emotional stress causes fatigue of the students’ body, regardless of the component composition of their saliva and the region of residence. Physical (muscular) tension of varying intensity tires the body of highly qualifi ed athletes to a lesser extent, which makes it possible to reveal their high stress resistance to overloads. Th us, saliva can serve as an indicator of mental and physical stress in the bioluminescent method. It is planned to develop new express methods for pre-trip inspections of railway employees.
Berdamai dengan Diabetes: Pengelolaan Stres untuk Meningkatkan Efikasi Diri Penderita Diabetes
Authors: Alfinuha Setyani , Hartanti Hartanti , Dianovinina Ktut
Published: October 2022

People with diabetes require complex and demanding daily medication adherence. If self-efficacy in dealing with diabetes is low, it might worsen the physical and psychological condition of people with diabetes. This study aims to determine the effect of cognitive-behavioral stress management in improving diabetes management self-efficacy. The participants of this study was middle-aged women with type 2 diabetes mellitus. This study employed mixed-method by combining the quantitative research method in the form of a single-case experiment and qualitative research method in the form of a case study. The study was conducted on the two participants who had low self-efficacy in carrying out care as diabetics. Cognitive-behavioral stress management interventions given to participants showed that participants experienced an increase in diabetes management self-efficacy.
Thought Stopping untuk Menurunkan Kecemasan Mahasiswa yang Sedang Menyusun Skripsi
Authors: Wahyuni Sari Desi , Abdullah Sri Muliati
Published: October 2022

Students who are writing a thesis often experience anxiety and need treatment so that their emotions are more stable and finally they can complete the thesis. This study aims to determine the effect of thought stopping. Thought Stopping was done by training the client to cut off disturbing thoughts by saying stop and change to positive thinking. The design used is a pre-test post-test control group design. The research instrument used an anxiety scale for thesis preparation. The results of the Mann Whitney U test in the post-test and follow-up of the experimental group and control group found each z-value of -2.619, p-value of 0.009 (p<0.05). The results showed that experimental group experienced a decrease in anxiety compared to the control group. The Wilcoxon Rank Test showed that there was a difference anxiety before and after thought stopping, with a z-value of -2.023, and a p-value of 0.043 (p<0.05).
Efektivitas Pelatihan “Functional Marketing: Marketing Social Skills 101” Pada Karyawan Perusahaan Asuransi Umum PT. X
Authors: Zulfa Qatrunnada Rizqi , Haura Syarifah Tsalitsa , Leonardo Siahaan Ferdinan , Aulia Putri Aisyah
Published: October 2022

This study aims to examine the effectiveness of “Functional Marketing: Marketing Social Skills 101” training in increasing marketing communication skills in General Insurance Company PT X. Research respondents were selected through purposive sampling technique aimed at 15 employees of the Marketing Department and the HR-Continuous Improvement Department of PT X. The quasi experimental used was the one-group pretest and posttest design. Analysis of the results used a non-parametric Wilcoxon Signed-Rank test with a significance value of .046 (p < 0.05). The result showed that there was a significant effect on increasing participants' understanding of marketing communication skills which included aspects of communication, active listening, and negotiation skills. In addition, participants also gave a positive evaluation about the entire implementation of the training program which includes aspects of training materials, training facilities, and training facilitators.
Engaging People from Ethic Minority Groups in Health and Oral Health Research: a booklet
Authors:   University of Dundee, Laird Catriona
Published: October 2022

Migrant and BME (Black and Minority Ethnic) groups are more likely to suffer from poorer health and oral health outcomes in general. In Dundee, 10.6% of the population identified as an ethnic minority. However, they have been underrepresented in research and health promotion interventions for decades. This reinforces the importance of using participatory research to capture the realities and health needs of these groups to inform policy and interventions addressing health inequalities. The research project ‘Engaging People from Ethic Minority Groups in Health and Oral Health Research’ aimed to engage individuals from migrant and BME groups and researchers who work with these groups to share their experiences, views and perceived challenges and opportunities to improve migrant and BME groups’ research participation. As a specific objective we wanted to identify effective strategies to engage these socially excluded groups in health and oral health research.
A Duality Principle and a Related Convex Dual Formulation Suitable for Local Non-Convex Variational Optimization
Authors: Botelho Fabio
Published: October 2022

This article develops a duality principle and a related convex dual formulation suitable for the local optimization of a non-convex primal formulation for a large class of models in physics and engineering. The results are based on standard tools of functional analysis, calculus of variations and duality theory. In particular, we develop applications to a Ginzburg-Landau type equation.
Rojolele: a Premium Aromatic Rice Variety in Indonesia
Authors: Dwiningsih Yheni
Published: October 2022

Rojolele is an Indonesian traditional rice variety from Klaten (Central Java) that classified as tropical japonica and low land rice which become a premium rice variety and have higher price in the market due to a delicious taste and a fragrance aroma. The agronomic characteristics of Rojolele are having high plant stature with sturdy stems and upright plant shape, thick and rough leaves, strong and deeper root systems, long panicle length, and long duration of life. Rojolele rice cultivation is facing important challenges from drought, diseases, long duration, and lodging. Thus, breeding Rojolele cultivars with resistance to drought, diseases, lodging, and short duration is the major focus for Rojolele rice improvement. Indonesian farmer have learned to successfully cultivate Rojolele by applying practical skills, leading to increase the rice productivity. Molecular breeding program, including quantitative trait loci (QTL), genome-wide association study (GWAS), genomic selection, and genome editing can be applied to improve Rojolele characteristics. In this review, important agronomic and quality traits, intensification system for irrigation and pest control, mutation breeding, transgenic lines, and also future perspectives for Rojolele research were presented. Rojolele is useful for rice breeding program in order to guarantee the food security to overcome increasing population and climate change.
An Service Program Evaluation at KPAI Indonesia
Authors: Parulian Rahmad , Hamidah  , R. Madhakomala
Published: October 2022

The research on evaluating the KPAI's mediation service program aims to evaluate the effectiveness of the implementation of the mediation program, which includes the input, process and outcome stages at KPAI. This research is classified as evaluative research using an evaluation model framework developed by Robert Stake with three evaluation components, namely: Antecedent (input), Transaction (process) and Outcome (result). Data were collected through document studies, interviews, observation and focus group discussions as well as the credibility of the data. Qualitative data analysis through data collection stage, data reduction stage (summarizing, coding, tracing themes, creating cluster ideas, creating partitions, writing memos), data presentation stage, and conclusion drawing stage. The results of the study can be concluded that in general mediation services at KPAI have been running effectively and efficiently. In general, all aspects evaluated meet the standard criteria set. All evaluation criteria meet the adequacy and accuracy of program implementation. All aspects evaluated have an equal equivalence relationship between the expected goals and the actual conditions that occur.
Improving Cooperative’s Business Performance with Entrepreneurial Orientation and Organizational Culture Through Innovation
Authors: Kadek Diah Desita Giri  , Widnyana I Wayan , Putu Agung Anak Agung
Published: October 2022

Cooperatives have the main goal of prospering its members which of course can be achieved by creating optimal business performance both in terms of financial and non-financial. This research was conducted with the aim of knowing the effect of entrepreneurial orientation and organizational culture on business performance directly and mediated by innovation. This research was conducted in Denpasar City with a population of 1,077 cooperative business units that are still active until 2020 and a sample of 292 cooperative heads. Data was collected by using interviews and questionnaires which were measured using a five-choice Likert Scale. Questionnaires were distributed using Google Forms and print outs. Data analysis was performed using Structural Equation Modeling-Partial Least Square (SEM PLS). The results of the analysis prove that entrepreneurial orientation has a positive and significant effect on business performance, organizational culture has a positive and significant effect on business performance, entrepreneurial orientation has a positive and significant effect on innovation, organizational culture has a positive and significant effect on innovation, and innovation has a positive and significant effect on business performance. The results of the mediation test prove that innovation mediates each of the effects of entrepreneurial orientation and organizational culture on business performance.
The Role Of Work Competence, Motivation, And Work Environment In Improving Employee Performance
Authors: Sapta I Ketut Setia , Gunantra I Wayan , Widnyana I Wayan
Published: October 2022

ABSTRACT

Competence and motivation do not necessarily improve or worsen employee performance; even working environment not only might be excessive but also might have less attention. This study aimed at exploring the changing role of working competence, motivation and environment to produce business value in achieving the excellent employee performance. This study was conducted at the Regional Planning, Research and Development Board in Tabanan Regency with a population of 80 employees by applying a sampling technique with saturated samples. The findings of this study led the results of increasing competence actually worsened the performance. However, motivation in carrying out work improved the performance due to wholeheartedly working performance and the employees realized about taking part in the work so that it can affect the performance of the organization itself. Meanwhile, good competence here meant the quality of building good working environment as positive and significant as the working motivation. Taking into account, condusive working environment encouraged employee performance in carrying out the work.

 Keywords     : Work Competence; Motivation; Work Environment; Employee Performance
Spectral Ellipsometry as a Method of Investigation of Influence of Rapid Thermal Processing of Silicon Wafers on their Optical Characteristics
Authors: Solodukha V. A. , Pilipenko U. A. , Omelchenko A. A. , Shestovski D. V.
Published: October 2022

One of the possible ways of improvement of the surface properties of silicon is the solid phase recrystallization of the surface silicon layer after the chemical-mechanical polishing with application of the rapid thermal treatment with the pulses of second duration. The purpose of the given paper is investigation of influence of the rapid thermal treatment of the initial silicon wafers of the various doping level and reticular density on their optical characteristics by means of the spectral ellipsometry method.

The investigation results are presented by means of the spectral ellipsometry method of the rapid thermal processing influence on the initial silicon wafers (KDB12 orientation <100>, KDB10 orientation <111> and KDB0.005 orientation <100>) of the various level of doping and reticular density influence on their optical characteristics: refraction and absorption ratios. Influence was confirmed of the silicon reticular density on its optical characteristics before and after the rapid thermal processing. It was shown, that reduction of the refraction and absorption ratios in the center of the Brillouin zone for the silicon samples with the high Boron concentration after the rapid thermal processing as compared with the low doped silicon. In the area of the maximum absorption peak, corresponding to the energy of the electron exit from the silicon surface (4.34 eV) the refraction indicator of the high doped silicon becomes higher, than of the low doped silicon, which is determined by the high concentration of the vacant charge carriers on the silicon surface in this spectral range.

It was established, that the spectral area 3.59–4.67 eV, corresponding to the work of the electrons, exiting the silicon surface, the most informative way shows the difference of the 3 optical parameters of silicon of the different orientation, and for evaluation of influence of the silicon doping level on its optical characteristics the most informative is the spectral range of 3.32–4.34 eV.
Non-Additive Quantity Measurement Model
Authors: Romanchak V. M. , Serenkov P. S.
Published: October 2022

This work considers a model for measuring non-additive quantities, in particular a model for subjective measurement. The purpose of this work was to develop the measurement theory and form of a measurement model that uses the corrected S. Stevens measurement model.

A generalized structure was considered that included an empirical system, a mathematical system, and a homomorphism of the empirical system into a numerical system. The main shortcomings of classical measurement theories seem to be: 1) homomorphism does not display operations (in this case, one cannot speak of the meaningfulness of the model); and 2) there is no empirical measurement model that could confirm the existence of a homomorphism. To overcome the shortcomings of existing theories a definition of the measurement equation is given. As a result a measurement model is obtained that is free from the shortcomings of classical measurement theories. The model uses the corrected model of S. Stevens and the reflection principle of J. Barzilai.

The measurement model was tested using laws that were obtained empirically. Using the model it is shown that Fechnerʼs empirical law is equivalent to Stevensʼs empirical law. This means that the problem which has attracted attention of many researchers for almost a century, has been solved.

A numerical example demonstrates the possibilities of the proposed measurement model. It is shown that the model can be used for extended analysis of expert assessments.
Non-Destructive Testing by Magnetic Noise Method of the Quality of Heat Treatment of Steel Samples Obtained by Additive Technology
Authors: Busko V. N. , Kren A. P. , Lanzman G. A.
Published: October 2022

The manufacture of products using additive technologies is accompanied by the unpredictable appearance of inhomogeneity of properties, anisotropy, residual stresses, porosity, and other defects. Therefore, there is a great relevance of non-destructive quality control of products obtained by additive technologies. The purpose of the paper is the experimental investigation of the possibility of testing and evaluation of the quality of heat treatment of three-dimensional and cast samples by non-destructive control methods.

The low-alloy steel 09G2S samples, which was obtained by casting and selective laser sintering different modes of subsequent heat treatments were studied. The method of the Barkhausen effect and the instrumented indentation method for measuring the material hardness were applied.

It was experimentally established that both methods are highly sensitive to annealed and normalized three-dimensional samples and their rejection. Compared to the hardness measurement method, which is mainly associated with phase-structural changes, the magnetic noise method due to selectivity to other controlled parameters is additionally sensitive to cast samples (at the same time the microstructures of cast and normalized three-dimensional samples are close to each other according to X-ray data).

The magnetic noise method can be used as one of the physical methods for evaluation the quality and control of the heat treatment of 3D samples at the manufacturing stage when testing their types and modes, as well as sorting samples.
Lifting Heavy Oil from Inactive Well By Hydraulic Lift Systems
Authors: Rehman Abid Ur , Abdelbary Marwan
Published: October 2022

For the past year, drilling new wells is proving to be more uneconomical for operators due to the oil supply cut down, an agreement between Organization of the Petroleum Exporting Countries (OPEC) and OPEC+ countries, and survey and rig expenses. In such scenarios, artificial lift systems (ALS) are becoming more popular for the ability to maximize production from the existing wells. This technology not only maximizes the current production of any well, but it can also successfully revive the production from inactive wells

The selection of the most suitable ALS in a specific well is crucial for optimal performance. Although a well might have more than one ALS applicable at the same time, an economic analysis will play an influential role besides providing technical solutions. The hydraulic lift is one of the most popular and the oldest ALS for low-pressure wells. On the other hand, the jet pump system is a widely proven ALS in the Middle East and Africa's oil fields. The system can be easily deployed in short time; then, production starts immediately after the well is kicked off.

This paper focuses on lifting heavy oil of 14° API in the northern Iraq region. This directional well 8D was drilled and completed in October 2014 to a total depth of 1,893 m, targeting the Upper Kometan and Shiranish formations. The well did not flow and was abandoned after a few days of the test due to an unsuccessful drill-stem test (DST). Later, in 2019, the well was altered with 3.5 in tubing targeting the Cretaceous formation at a depth of 1,785 m and killed with drilling fluids after workover. Since the oil was heavy, a sliding sleeve door (SSD) was already installed in the completion stage for the future use of ALS. As expected, the well was not able to flow on its own due to oil viscosity and lesser bottom hole pressure. A jet pump was selected as a suitable lift system for this well based on the unloading selector, application, well completion jewelry, and economic analysis.

The well was lifted successfully and produced an accumulative 500 BFPD with around 14% water cut. As the well was not flowing before the jet pump installation, most of the production data was collected during the operation, and the jet pump design was changed accordingly for maximizing production. The production was experiencing emulsions as well, which were treated with chemical injection using the same system. The well was cleaned from drilling fluids until the operator got stable formation fluids, which produced better results. The details of the whole operation are discussed in this paper. The conclusion of this study will assist in the application of a jet pump system for other heavy oil fields as well.
Managing Gas Lift optimization Opportunities Through Enhanced Production Advisory with AI/ML
Authors: Fuenmayor Roberto , Mokhlis Mohamad Mustaqim , Muniandy Satyaraj
Published: October 2022

The oil industry is evolving and inventing new ways to increase production and spending less time screening candidates. We expanded on the previous paper (Abu Bakar et al. 2020) where we described the benefit of combining multiple workflows based on engineering models to be used as validations checks and created a confidence score for the wells to be executed in the field.

The main objective of this paper is to share an alternative solution to enhance or complement the results of each of the workflows by using artificial intelligence/machine learning (AI/ML) to predict well production and/or fill data gaps needed to run the workflows.

The workflows taken into consideration in this paper are gas lift optimization (GLO), gas lift diagnostics (GLD), gas lift surveillance (GLS), sand management monitoring (SMM) workflow, and well test validation (WTV).
Planning the Production Lifecycle of a Newly Developed Gas Field in a Remote Desert
Authors: Hochanadel Steven , Setiadi Bagus Wahyu , Valbuena Jose , Mahfouz Mahannad , AlNasser Fatimah Hashim
Published: October 2022

The objective of this paper is to present an analysis and methodology to forecast individual well production in a new, developing channel sand gas reservoir complex. The paper predicts when liquid loading may occur, specifies a strategy for changing production tubing sizes, and selects the types of artificial lift that may be required in the future.

The approach of this paper is to forecast production rates using a combination of decline curves and vertical lift performance (VLP) curves. Liquid loading is projected to occur when the gas production rate of a well reaches the Turner critical flow rate in the existing production tubing size and expected wellhead pressure. Artificial lift methods are identified using an artificial lift type screening matrix based on the production parameters after liquid loading occurs. Artificial lift methods are also examined for a scenario of increased water production if water encroachment occurs in a well.

Not all wells decline at the same rate due to the nature of the sand channels. Some wells will reach a critical rate faster than others. Once a critical rate is reached in a well, the first step to maintain the flow will be to install smaller internal diameter production tubing. As production continues to decline, liquid loading will occur again in the smaller tubulars. At this point, artificial lift will be necessary to extend well life to the economic limit. The primary focus then becomes gas well deliquification using plunger lift or foam lift. For the water encroachment scenario, plunger lift or foam lift will not suffice; instead, the artificial lift methods of rod pump, gas lift, or hydraulic jet pump apply. However, a feasibility assessment will need to be made to determine whether the lift methods are economic.

This paper presents a methodology to plan for the production lifecycle of a gas field from the outset. It provides some insight on when to plan for procurement and installation of smaller internal diameter tubulars in a remote desert area where workover rigs are not present. Further, the methodology allows some assurance that artificial lift methods will be ready to implement when needed to maximize recovery.
Improving Run Life of Coiled-Tubing-Deployed ESP in Harsh Environment for Qatar's Al Karkara Field
Authors: C. Palliparambil Rashid , Caridad Jose , G. Dector Eduardo , Khade Sudhakar , Atiencia Neymar , Amr Gewily Ahmed , Al-Owairi Salem , Marcu Daniel , A Al-Yafei Ahmed
Published: October 2022

Alternative deployed ESP Systems are strings that are deployed in the well on other than conventional tubulars. Coiled Tubing (CT) deployed Electric Submersible Pumps is one of the most common configurations and has been used successfully in Al Karkara field to reduce intervention cost. As part of a closed loop product improvement workflow, utilizing data from dismantle, inspection and failure analysis of equipment, design improvement were suggested and implemented to address root causes and maximize life in Al Karkara.

As part of this work, the main challenges of the application as well as weaknesses identified on the different sections of the string are explained in detail. Moreover, the design and specification changes incorporated because of said observations are also covered, including improvements on the power cable, lower connector, multisensor, motor, bottom intake, and base protectors, among others. Through implementation of downhole equipment ESP upgrade and enhancing the operating philosophy, this improved the run life of Al Karkara field by more than 300%.

With the industry shifting into a drastic reduction of total cost of ownership (TCO) approach and with the volatility of oil price, the rigless ESP deployment through coil tubing will help to eliminate the cost of a work over rig while reducing the deferred oil production. This paper showcases the ESP capabilities in this corrosive and high temperature environment.
Backpressure Reduction on Beam Pumping Wells by Flowline Gas Purging
Authors: Gluscevic Andreja Ante
Published: October 2022

Tatweer Petroleum has faced challenges in production caused by high backpressure against beam pump wells that are producing from low pressure and weak inflow reservoirs in the Bahrain Field. To overcome these challenges, different projects have been conducted, depending on the main source of backpressure. Therefore, this paper will describe the significant positive impact on production and pump efficiency by handling backpressure issues on wells and/or group of wells with long oil flow-lines.

Beam pumping is a method of oil production that has been used for more than 100 years in a vast variety of oil fields due to its simple operations. Its usage increases in pressure-depleted reservoirs due to the pumps’ ability to maximize drawdown; hence production. Nevertheless, even after 100 years, production engineering challenges persist in dealing with issues such as backpressure. Complexity is also added when operating beam pumps in low reservoir-pressure, or highly-fractured and tight carbonate reservoirs. It was identified that in long flow lines subsequent gas and liquid slugs are formed due to slow flow, low pressure and gravitational segregation. The slug formation is enhanced with variable elevation of different flow-line sections. In order to move slugs through the flow lines, more energy is required, thus line pressure increases. Movement of fluids according to the project is enabled by high pressure gas injected in the line on cyclic basis in very short time. This way wells are not under high pressure during injection and on the other hand flow line is purged and all slugs are removed so most of the time backpressure is low.

The main objective of the project was achieved by adding gas injection at the satellite manifold, consisting of multiple wells. This can also be achieved by adding well producing with intermittent gas lift, stop-cock or plunger lift. Introducing high-pressure gas intermittently, downstream the wellhead or remote satellite manifold would purge all the slugs and instantly drop the line pressure to the minimum. Implementing this project oil production was increased twice and made more stable.

Regarding wells equipped with Beam Pumps, seldom was challenged problem with backpressure of the facilities or flow assurance, assuming by default that pump would overcome any of possible issues. This paper discusses and proposes solution of overcoming backpressure from facilities as a key factor to produce optimally.
A Lesson Learned from Slickline Deployed ESP System Field Trials in H2S Well Environment
Authors: Al-Shunaiber Fahad , Al-Dossary Ibrahim , Windiarto Yhossie , Al-Saif Abdolrahman
Published: October 2022

Electrical Submersible Pumps (ESP) are one of the most utilized artificial lift methods in the oil industry. A faster ESP replacement methodology is the ultimate solution to reduce the deferred oil production and reduce cost. This paper focuses on the lessons learned from the previous field trials of slickline deployed ESP systems, including the deployment procedure, benefits, installation challenges, reliability, and recommendations for future installations.

Two different deployment concepts of slickline deployed ESP system were trial tested in mild and high H2S well environments. These systems employ a downhole wet-mate connector as a power delivery point connecting the permanent and retrievable completions to power the ESP motor. The trial test successful criteria are dictated by the proven concept of rigless ESP replacement and system reliability. Multiple elective ESP retrievals and reinstallations were performed using a slickline unit after operating for several months. The main objective was to evaluate the downhole electrical system reliability under actual production conditions.

The new slickline deployed ESP concept minimized locked-in oil potential through safe and swift ESP replacement in a live well, enabling SIMOPS, and eliminating downtime time associated with the rig mobilization and flowline remanifolding. The design and reliability improvement on the electrical and mechanical systems of both concepts are essential to prolong the system's run-life in an H2S well environment. Moreover, the downhole completion strategy and metal-to-metal seal in the electrical system are believed to be key success factors to prolong the system run-life.