bluuebunny/crossref_metadata_2025_split huggingface dataset:
IDENTIFIKASI POTENSI PANAS BUMI DI DESA LIMANG KECAMATAN TIGABINANGA KABUPATEN KARO MENGGUNAKAN CITRA SATELIT LANDSAT 8 DAN GEOLISTRIK RESISTIVITAS
Authors: Kadri Muhammad , Siallagan Angelina 
Published: October 2023

Penelitian yang dilakukan untuk mengidentifikasi potensi panas bumi di Desa Limang Kecamatan Tigabinanga Kabupaten Karo menggunakan citra satelit landsat 8 dan geolistrik resistivitas terletak pada koordinat 03o07’13” LU dan 98o14’08” BT yang berada 600-700 meter di atas permukaan laut. Penelitian ini bertujuan untuk mengetahui adanya anomali panas sebagai pendugaan terdapatnya potensi panas bumi di bawah permukaan daerah tersebut dengan menggunakan metode citra landsat 8 dan geolistrik resistivitas. Pengambilan data dilakukan dengan dua cara yaitu pengunduhan data citra landsat 8 yang telah disesuaikan pada laman USGS untuk metode penginderaan jauh dan melalukan penelitian di lapangan dengan alat geolistrik resistivitas (ARES-G4 v4,7 , SN: 0609135). Data yang telah diperoleh kemudian diolah untuk dianalis dan diinterpretasikan, pengolahan dan analisis data dilakukan dengan software Envi, ArcGIS, Res2dinv dan lainnya. Hasil penelitian citra landsat 8 menunjukkan korelasi NDVI dan LST dan korelasi LST dengan tutupan lahan dan elevasi yang menunjukkan adanya anomali yang kemudian disesuaikan dengan faktor penyebabnya. Metode geolistrik resistivitas menunjukkan nilai resistivitas pada daerah tersebut berkisar dari 0,904 Ωm sampai dengan 1,26 Ωm pada lintasan 1 dan 0,114 Ωm sampai dengan 9,93 Ωm pada lintasan 2 yang menginterpretasikan bahwa struktur lapisan bawah permukaan tersebut didominasi oleh air tanah yang terkontaminasi oleh air sungai yang mengalir di dekat daerah penelitian dan tanah lempung atau lanau, yang merupakan hasil pelapukan batuan yang mengandung silika oleh asam karbonat dan aktivitas panas di bawahnya dan mengakibatkan munculnya manifestasi air panas di atas permukaan di daerah tersebut.
ANALISIS LOGAM TIMBAL (Pb) DAN ARSEN (As) PADA SUSU KAMBING ETAWA YANG BEREDAR DI KOTA MEDAN MENGGUNAKAN SPEKTROFOTOMETRI SERAPAN ATOM (SSA)
Authors: Barus Eviyona Laurenta , Nst Zuhairiah , Butar-butar Berta 
Published: October 2023

Logam Timbal (Pb) dan logam Arsen (As) merupakan metalloid yang sangat berbahaya, beracun, dan juga bersifat karsinogenik. Susu merupakan makanan yang ideal karena mengandung sebagian besar nutrisi yang dibutuhkan tubuh sehingga baik untuk dikonsumsi. Penelitian ini bertujuan untuk mengetahui kadar Arsen dan Timbal pada susu yaitu Susu Kambing Etawa. Sampel yang digunakan adalah susu kambing etawa murni dan susu kambing etawa bubuk. Metode yang digunakan dalam analisis logam timbal dan logam arsen yaitu secara spektrofotometri serapan atom, dengan nyala udara-argon pada panjang gelombang 217 nm untuk Timbal (Pb) dan 193,7 nm untuk Arsen (As). Hasil penelitian menunjukkan bahwa kadar timbal tertinggi adalah 0,0083 mg/kg dalam susu kambing etawa bubuk, dan pada susu kambing etawa Murni tidak terdeteksi adanya logam Timbal dan Arsen. Berdasarkan persyaratan SNI 7387.2009 kadar timbal (Pb) pada olahan susu yaitu 0,02mg/kg, kadar arsen (As) pada olahan susu yaitu 0,01 mg/kg. Maka dua sampel susu kambing etawa bubuk dan dua susu kambing etawa murni memenuhi syarat yang ditetapkan oleh SNI 7387.2009.
Unprecedented Times: Māori Experiences of Pandemics Past in the Time of COVID-19
Authors: Jones Nicolas , Mortensen Steagall Marcos 
Published: October 2023

Covid-19’s (mate korona) spread across the world and the implementation of wide sweeping government instigated public health measures saw a growing notion globally that we are living in “unprecidented times”. This notion was also expressed in Aotearoa New Zealand with the arrival of Covid-19 to Aotearoa New Zealand shores in early 2020. While Covid-19 presents a new epidemiological threat, examination of Aotearoa’s historical twentith century pandemics and sporadic outbreaks of infectious diseases show similar challanges to tikanga Māori (Māori protocols, customs, and behavioural guidelines) as COVID-19 presents today. This paper contextualises Māori experiences of epidemics and pandemics of the past and explores the historical and contemporary assaults on Māori customs during times of disease. Drawing on archival research, contemporary sources, and interviews with kaumātua (Māori elders) conducted during Aotearoa’s first national lockdown in 2020, this study scrutinises both historical and contemporary New Zealand Governmental responses and media attitudes towards tangihanga (funarary rites) and hongi (pressing of the noses) during pandemics and epidemics. Alongside examining the cultural significance and importance of tangihanga and hongi to Māori, this study shows that far from being “unprecedented times”, many of the same challenges to these practices Māori have faced during past pandemics and epidemics have remerged during COVID-19. Through this examination, this study highlights that a pattern exists where tikanga Māori practices come under public and political scrutiny and attack during pandemics and infectious disease outbreaks. Kaumātua are bastions of tikanga and collective memory of pandemics and other crises of the past and have integrated tikanga based disease mitigation measures into their intergenerational collective memory corpus. This paper highlights both the importance of these tikanga practices to kaumātua, and how tikanga informed kaumātua approaches to COVID-19 public health measure restrictions and their personal hauora (health). By undertaking this study, this paper draws particular attention to tikanga as an imperative aspect of Māori identity that must be understood by health officials, and the continual importance of the tikanga Māori concept of tapu (restricted, set apart, sacred) in mitigating disease and maintaining Māori hauora (health).
ORGAN-PRESERVING INTERVENTIONS IN SURGICAL CORRECTION OF SPLEEN CYSTS IN CHILDREN
Authors: Kuzyk Andriy 
Published: October 2023

The surgical approach to splenic cyst treatment in children is rather controversial. There are different organ-preserving surgeries available to treat children with the spleen affected by cystic lesions. These surgical interventions are thoroughly discussed in various sources.
The aim is to evaluate different options available for surgical treatment of splenic cysts in children.
Material and Methods. The timeframe of the research involved a period from January 1998 to December 2020. Both medical examinations and treatment procedures of 265 children aged from 1 month to 18 years old, suffering from splenic cysts, were analyzed retrospectively. There were 175 patients (66.04%) who underwent surgery, while 90 individuals (33.96%) remained under dynamic observation.
Results and Discussion. A total of 119 open surgeries (68.00%) and 56 minimally invasive surgeries (32.00%) were performed on cysts located in different areas. All surgical interventions were performed on children. The preferred type of open surgery entailed partial splenic resection. There were 71 patients (59.66%) who underwent the procedure. The cysts displayed the tendency to recur after laparotomy. This phenomenon was observed in 2 patients (1.68%). Another partial cystectomy was performed to correct the condition. The operation involved laparotomy-assisted capitonnage. Partial cystectomy was the preferred type of minimally invasive surgery. The following surgical intervention involved 30 children (53.57%). A number of 21 patients underwent cystectomy with capitonnage (37.50%), while 5 individuals (8.93%) had a partial splenic resection. Cysts recurred in 3 patients (5.36%) after laparoscopic intervention. Laparoscopic correction of the recurred cyst was performed on 1 patient, while the other 2 individuals underwent open surgeries. Over time, a minimal residual cyst cavity was observed in 9 children (7.56%) after open surgery. Having undergone minimally invasive surgery on splenic cysts, 7 patients (12.50%) suffered from a minimal residual cyst cavity, which healed on its own within 1-2 years.
Conclusion. The type of surgery used to correct splenic cysts should fulfil the individual requirements of patients. The location, size, and structure of the major vessels must be considered. Splenic parenchyma must be thoroughly examined since it can be affected. Unroofing surgery can be performed while operating on children with SC if the location, size, and degree of parenchymal involvement are taken into consideration. Unroofing surgery should be accompanied by capitonnage to either close or decrease the volume of the residual cyst cavity. Partial splenic resection is performed through either laparoscopy or open surgery since blood supply of the spleen is vital. Partial splenic resection is a rational treatment method used for SC as it eradicates the above-mentioned pathology and preserves all essential functions of the spleen.
EMPIRICAL VERIFICATION OF THE STRUCTURAL MODEL RELATING EQUILIBRIUM VALUES OF COSTS, QUALITY, AND COMFORT OF MEDICAL SERVICES WITH INDIVIDUALIZED ELASTICITIES OF DEMAND
Authors: Klymenyuk Oleg , Ocheredko Oleksandr , Klymenyuk Volodymyr , Rudenko Anastasiia 
Published: October 2023

The healthcare system in Ukraine is moving to flexible mechanisms to support the quality and comfort of medical services, in particular through the introduction of co-payments. The following necessitates the development of theoretical background and econometric models to support the process evaluation and optimization.
Aim. The research aims at performing empirical verification of the structural model relating equilibrium values of costs, quality, and comfort of medical services with individualized elasticities of demand.
Material and Methods. We have performed a combined (retrospective + prospective) study of the cases of uterine fibroids and/or ovarian cysts treated surgically in three city gynecological hospitals/centers in Vinnytsia, Ukraine. An econometric model of D. Dranove and M. Satterthwaite was used as the theoretical basis, the one that describes the dynamic equilibrium of cost, quality, and comfort of medical services together with demand elasticities. Importantly, the system of structural equations models joins moves of equilibrium of the price, quality, and comfort of medical services given shifts in the elasticities of demand. This is of use to analyze factors of efficiency and responsiveness to the demand of health care provision. Unfortunately, we did not find any practical use of this promising theoretical model, possibly due to the lack of empirical verification.
Results and Disscusion. Therefore, we analyzed 150 case histories of women with uterine fibroids and/or ovarian cysts treated surgically. The data on the costs, quality, and comfort of inpatient care are studied to enable empirical verification of the model. The modern Monte Carlo Markov Chain (МСМС) methods of structural modeling and power analysis were used to estimate the required sample size.
Conclussion. As a result of the study, the system of structural equations accompanying the theoretical model has been empirically verified for the first time and proved to be valid for ascertaining rational ways to optimize inpatient servicing of women with given gynecological pathology, in particular through the management of demand elasticities.
RISK-ORIENTED PREDICTION OF PREGNANCY LOSS PATHOLOGY BASED ON A PERSONALIZED APPROACH
Authors: Timchenko Nataliia , Gutor Taras 
Published: October 2023

The increase in the frequency of pregnancy loss and the negative prognostic trend with the probable development of the demographic crisis in connection with the martial law in Ukraine and the mass migration of the female population provoked by it, requires the search for all possible ways of prevention and prophylactic of this pathology.
Aim. Development and scientific substantiation of a risk-oriented model of prevention of pregnancy loss.
Material and Methods. In the course of creating a model for determining the probability of the appearance of symptoms of pregnancy loss, we used a step-by-step method of logistic regression with the gradual exclusion of unreliable signs according to the Wald method.
Results and Discussion. In the process of sociological research, the importance of 30 risk factors was analyzed, and 14 factors were singled out from among them using the logistic regression method, which, when combined, have a probable impact on the development of pregnancy loss. Namely: emotional strain/stress in everyday life, first ultrasound and biochemical screening, history of herpes type 1, chlamydial infection, COVID-19, tonsillitis, allergic rhinitis/sinusitis, autoimmune thyroiditis, presence of type I diabetes, use of artificial insemination, wine consumption, additional use of folic acid and drugs, marital status, and computer work. Among these 14 factors, three have a preventive effect, while the other 11 increase the risk of developing the pathology of pregnancy loss. This preventive model is reliable (p<0.001) and was transformed into the application "Individual prediction of the occurrence of pregnancy loss pathology" created for the Android platform, which provides 95.5% accuracy of the prediction of the occurrence of pregnancy loss pathology.
Conclusions. The personalized preventive model can be applied by general practitioners/family doctors and obstetrician-gynecologists in order to form risk groups among pregnant women and prevent the occurrence of pregnancy loss pathology.
RELATIONSHIP BETWEEN THE ACNE CLINICAL COURSE AND SEVERITY AND THE STATE OF MICROBIOTA OF THE SKIN AND LARGE INTESTINE
Authors: Dashko Marianna , Syzon Orysya , Volbyn Svitlana 
Published: October 2023

A high incidence of acne, tendency to its chronic course with the formation of resistance to treatment and frequent development of deep forms determine an important medical and social significance of the problem.
Aim. To study and evaluate the degree of changes in the microbiocenosis of the skin and large intestine in patients with acne, depending on their clinical course.
Materials and Methods. We examined 85 patients with acne, aged 18 to 45 years, 49 (57.65±5.36%) women, 36 (42.35±5.36%) men and 35 apparently healthy persons who made up the control group. The composition of microbiota of the skin and large intestine was examined using a bacteriological method.
Results and Discussion. It was found that there is a significantly lower content of bifidobacteria and lactobacilli, bacterioids and total E. coli count in the large intestine in patients with acne associated with a higher amount of E. coli with enzyme properties, conditionally pathogenic enterobacteria, enterococci and fungi of the genus Candida. When using Friedman's non-parametric analysis of variance, it was found that there is a statistically significant difference between the frequency of detection of normocenosis and the stage of the large intestinal dysbiosis and the development of clinical forms of acne. At that, normocenosis was detected more often in patients with comedonal acne, while papular and nodular acne occurred more often in patients with manifestations of different stages of dysbiosis. An increase in seeding with associations of the alpha-hemolytic streptococcus + Staphylococcus haemolyticus + Micrococcus, beta-hemolytic streptococcus + Staphylococcus aureus + E.Coli + Candida albicans and a significant increase in the growth of alpha-hemolytic streptococcus, Staphylococcus haemoliticus and Staphylococcus aureus were found in the microbiocenosis of the skin in patients with acne. At that, all of the above microorganisms were not cultured in the patients of the control group.
Conclusion. The qualitative and quantitative changes in the parameters of microbiocenosis of the skin and large intestine, which depend on the clinical course of dermatosis, were found in the examined patients with acne. This indicates the need for additional examination of such patients with the aim of prescribing a pathogenetically substantiated therapy.
Quadratic BH-algebras and Quadratic TM-algebras
Authors: Bajalan Shawn Adnan , Hassan Mohammed Shahab , Bajalan Aram K. 
Published: October 2023

In this paper we present the notion of “quadratic” BH-algebra and TM-algebra, and show that every quadratic BH-algebra and TM-algebra has a product of the form , where ; if is a field with and BCI-algebra. Moreover, we show some theorems and examples with relationships among B-algebra, BH –algebra, BG-algebra and TM-algebra.
Applied Lyapunov Stability for Some Nonlinear Stochastic Differential Equations
Authors: Abdurahman  Nibal Sabah , Salim Abdulghafoor Jasim  
Published: October 2023

In this paper, we applied and explain the stability to some linear and non-linear stochastic differential equations by using the Lyapunov direct second method, after finding the stochastic differential equation which obtained by applying the (Ito-integrated formula) and the quadratic Lyapunov function be taken, we use the Lyapunov theorems to find and explain if the trivial (zero) solution are stochastically stabile (p-stable, mean square stable and stochastically asymptotically stable in the large ), then we explain the methods by some examples.
Risks of the Smart City Concept
Authors: Kostina E. 
Published: October 2023

The concept of smart city is one of the most popular directions of urban development nowadays. The use of modern information and communication technologies in the urban environment improves the comfort of life, the efficiency of urban space management, leads to sustainable development and rational consumption of resources. However, like other approaches, there are risks associated with the accelerated and large-scale introduction of modern technologies and the unpreparedness of society to accept them. Digitalization should not the aim, government should use an integrated approach. This work is devoted to the study of the risks of introducing the concept of a smart city. There are technological risks (absence or imperfection of domestic technological solutions in this area, cybersecurity threats: risks of system instability and data leaks), economic (low efficiency of implemented innovations, growing digital divide), managerial (technical and psychological unpreparedness of the authorities, loss of urban authenticity ), institutional (legislation behind the practice of applying modern technologies, the presence of a conflict of interest between public and private commercial interests), related to human capital (unpreparedness of the population to use technology, the risk of a technocratic approach to the implementation of the concept) and environmental risks. Although the literature has given more attention to the technological risks of a smart city, other risks (like economic, managerial, etc.) are also important. These risks are closely related and have a significant impact on the process of digital transformation of the urban environment, which may slow it down or reduce its effectiveness. Therefore, it is necessary to take them into account when planning the implementation and development of a smart city.
The Cozzolino Criterion as a Tool of Oil and Gas Exploration Projects Evaluation Adjusted for Risk Aversion
Authors: Kovalev S. , Blam I. 
Published: October 2023

Oil and gas exploration projects are typically characterized by a combination of high potential gains and extremely low chances of success, so their appraisal requires some risk aversion discounting. Amongst many risk aversion-adjusted methods of project valuation proposed by economists, the Cozzolino criterion appears to be the most appropriate. However, being applied to the problem of determining the optimum working interest in an exploration venture, this criterion yields an anomalous result such that the optimum working interest first increases and then decreases as the potential gain increases. This problem has inspired an intensive discussion in the oil and gas economics literature but, apart from attempts to overcome the problem by adding extraneous constraints that are somewhat palliative in nature, there has not been proposed a clear and acceptable procedure for overcoming all difficulties.In this article, it is shown that the paradoxical result can be explained if one steps outside the narrow limits of the working interest optimization task and view the issue as a part of a broader problem of building an investment portfolio. The authors propose a decomposition of the total impact of the project gain change on the optimum working interest into two components that resemble the substitution effect and the income effect. Both components have intuitively understandable economic sense and unambiguous sign. The resulting sign of the total impact depends upon the relative sizes of the two oppositely directed effects that can be calculated numerically, thus providing a better understanding of the issue.
Anchor high-tech and knowledge-intensive companies as the basis of technological sovereignty
Authors: Kh. S. 
Published: October 2023

The focus of this paper is high-tech and knowledge-intensive companies that create the basis for the technological development of the economy. The purpose of the work is to identify key (anchor) companies that can have a significant impact on the development of the high-tech sector and serve as the basis for the country's technological sovereignty. The theoretical basis of the analysis is the adapted anchor tenant hypothesis, which came from the real estate economy. Anchor high-tech and knowledge-intensive companies order research; create new technological solutions, from which new companies subsequently arise; are involved in the training process; show a stable demand for materials, raw materials, components; and also provide their partners with the opportunity to integrate into global value chains.Analysis of high-tech and knowledge-intensive companies performance micro data (SPARK-Interfax database) showed that in 2016-2020 73% of companies belong to seven sectors (these are activities in the field of architecture and engineering design, etc., chemical and automotive industries, telecom, scientific activities, software development and mechanical engineering, etc.), which account for 64-67% of the total revenue of the Russian high-tech business. Based on an analysis of the level of concentration and stability of leadership in these key activities, 43 companies were selected to potentially be considered anchor high-tech and knowledge-intensive companies. Further, taking into account the weight of companies in their industries and comparing their dynamics with the industry, 12 leading anchor companies were identified, united in three groups - "stability", "forward movement" and "explosive growth". The position and prospects of the leading companies were considered in more detail. The analysis showed that in the Russian economy there are examples of successful high-tech and science-intensive companies that, if the emerging opportunities are realized, can act as an “anchor” of technological development.