bluuebunny/crossref_metadata_2025 huggingface dataset:
Особливості комплектування військових частин Військово-Морських Сил
Authors: Trystan Andrii , Pedosiuk Oleksandr , Kononenko Volodymyr
Published: December 2023

Мета роботи: висвітлення особливостей комплектування військових частин, а також рекомендації, які забезпечать прозорість підбору і розстановки кадрів.

Метод дослідження: метод аналізу.

Результати дослідження: запропоновано рекомендації з удосконалення системи комплектування, покращення процесу підбору і розстановки кадрів.

Теоретична цінність дослідження: результати проведеного дослідження можуть бути використані під час удосконалення системи комплектування Збройних Сил України, а також у ході подальших досліджень з даного напряму в наукових установах.

Тип статті: теоретична.
Factors affecting the demining process
Authors: Krivtsun Volodymyr , Nanivska Lidiia
Published: December 2023

Purpose: is to analyze the factors affecting the demining process of the contaminated with explosive objects territory during the terrain reconnaissance, making safe lanes in minefields, complete (humanitarian) demining in order to take them more fully into account when conducting research on ensuring the effectiveness of the remote-controlled demining system.

Method: analysis, synthesis.

Findings: The article analyzes the main factors that affect the effectiveness of the Defense Forces' tasks of terrain reconnaissance for the presence of explosive objects and demining, as well as the creation and operation of a remote-controlled demining system.

Paper type: theoretical.
Методика організації взаємодії суб’єктів інтегрованого управління кордонами щодо протидії тероризму в міжнародних пунктах пропуску
Authors: Polishchuk Dmytro
Published: December 2023

Мета роботи: розробити методику, яка описує процедуру організації взаємодії суб’єктів інтегрованого управління кордонами щодо протидії тероризму в міжнародних пунктах пропуску.

Метод дослідження: аналіз, синтез, дедукція, узагальнення, індукція.

Результати дослідження: запропоновано методику організації взаємодії суб’єктів інтегрованого управління кордонами щодо протидії тероризму в міжнародних пунктах пропуску.

Теоретична цінність дослідження: дослідження містять нову процедуру формування логічно-послідовних етапів спільної роботи суб’єктів інтегрованого управління кордонами, спрямованої на нарощування спроможностей до виконання завдань з протидії тероризму в міжнародних пунктах пропуску.

Практична цінність дослідження: результати дослідження можуть бути використані органами управління та представниками суб’єктів інтегрованого управління кордонами для удосконалення процесів організації взаємодії щодо протидії тероризму в міжнародних пунктах пропуску через державний кордон України.

Оригінальність: розроблена методика складається з підготовчого і основного етапів та містить чітку процедуру організації та корегування процесів взаємодії.

Тип статті: теоретична.
Обґрунтування технічних вимог до пунктів управління артилерії тактичного рівня
Authors: Laznya Oleksiy , Dorofeev Mykola , Shinkarenko Evgeniy
Published: December 2023

Мета роботи: аналіз приладо-технічного оснащення рухомих пунктів управління артилерії тактичної ланки збройних сил іноземних держав та обґрунтування вимог до їх складу, що будуть відповідати сучасному рівню.

Метод дослідження: системний аналіз.

Результати дослідження: розглянуто питання щодо оснащення рухомого пункту управління артилерії провідних країн світу та запропоновано варіанти його приладового оснащення.

Теоретична цінність дослідження: обґрунтування технічних вимог до пунктів управління артилерії тактичного рівня на основі аналізу світових зразків озброєння та військової техніки.

Тип статті: практична.
Аналіз факторів, що впливають на розвиток форм і способів застосування сил оборони України в умовах гібридізації збройних конфліктів
Authors: Semenenko Oleh , Mytchenko Serhii , Vodchyts Oleksandr , Dobrovolskyi Yuzef , Tarasov Ruslan , Lysenko Yevhen
Published: December 2023

Мета роботи: полягає у визначенні та проведенні аналізу факторів, що впливають на розвиток форм і способів застосування сил оборони України в кризових ситуаціях воєнного характеру з урахуванням впливу гібридизації збройних конфліктів, а також дослідженні можливостей адаптації існуючих форм та способів застосування Збройних Сил України до викликів пов’язаних із гібридизацією воєнних дій із урахуванням аспектів триваючої російсько-української війни.

Метод дослідження: основними методами досліджень є методи аналізу та синтезу; методи статистичного та порівняльного аналізу; метод формалізації; методи абстрагування та спостереження, метод експертного опитування.

Результати дослідження: Основними результатами є те, що в статті: визначено основні особливості кризових ситуацій воєнного характеру з урахуванням гібридизації конфліктів; сформовано основні поняття за тематикою розвитку форм і способів застосування сил оборони в кризових ситуаціях воєнного характеру з урахуванням впливу фактору гібридизації конфліктів; визначено основні воєнні та економічні фактори, які впливають на розвиток форм і способів застосування сил оборони України та розраховано експертні оцінки впливу факторів на ефективність застосування сил оборони в період з 2015 по 2023 рік; розкрито приклади негативних наслідків для України пов’язаних з помилками та прорахунками в процесі врахування впливу факторів під час формування поглядів щодо розвитку та застосування ЗС України.

Теоретична цінність дослідження: теоретична цінність дослідження полягає у Проведений аналіз показав, що у сучасних умовах, коли природа конфліктів та загроз безпеці стає все більш складною та різноманітною, розуміння основних термінів та понять, пов’язаних з формами та способами застосування сил оборони в кризових ситуаціях воєнного характеру, набуває важливості безперервного аналізу та адаптації.

Тип статті: аналітичний, теоретично-методичний, описовий, практичний.
Synthesis, Characterization, and Investigation of Antimicrobial Activities of New Naphthoquinone Compounds from 2-(butylthio)-3-chloronaphthalene-1,4-dione
Authors: YAVUZ Şenol
Published: December 2023

In this study, the compound 2-(butylthio)-3-chloronaphthalene-1,4-dione (3) was synthesized from the reaction of the compound 2,3-dichloro-1,4-naphthoquinone (1) with 1-butanethiol in alkaline medium. The synthesized compound 2-(butylthio)-3-chloronaphthalene-1,4-dione (3) was used as the starting compound. As a result of the nucleophilic substitution of 2-(butylthio)-3-chloronaphthalene-1,4-dione (3) with heterocyclic compounds containing nitrogen, sulfur, and oxygen atoms, a series of 10, 11, 12, 13, 14, 15, naphthoquinone derivative compounds were synthesized. The structures of the synthesized compounds were characterized by FTIR, 13C-NMR, 1H-NMR, and Mass Spectroscopy techniques. The antimicrobial properties of the synthesized compounds were examined by performing antimicrobial studies with Gram-positive and Gram-negative bacteria. The compound 2-(butylthio)-3-chloronaphthalene-1,4-dione (3) shows the highest antimicrobial activity, whereas the compound 2-(butylthio)-3-((4,5-dihydrothiazol-2-yl)thio) naphhalene-1,4-dione (10) exhibits the lowest antimicrobial activity. Compounds 3, 11, 12, 13, 14, and 15 exhibited enhanced activity against Gram-positive bacteria, such as B. subtilis and S. aureus, as well as Gram-negative E. coli and K. pneumoniae. In addition, compounds 11, 12, and 14 exhibited activity against Gram-positive B. subtilis and S. aureus, as well as Gram-negative E. coli, K. pneumoniae, and P. aeruginosa. The study aims to enhance existing literature research and create new unknown compounds through synthesis.
Optimising Cardiovascular Fitness: A Pretest-Posttest Investigation of Tabata Training on VO2max in Junior Futsal Players
Authors: Junaedi Akhmad , Yunus Mochammad , Taufik Taufik
Published: December 2023

This research was compiled based on the researcher's goal, namely to find out the effect of Tabata Training on the VO2 max level of futsal players. The research design uses a one-group pretest and posttest design. First of all, a pretest was carried out to determine the initial condition of the athlete's VO2 max and then given treatment in the form of Tabata Training. After that, measurements were retaken to find out the difference in results after being given treatment. The subjects in this study were 15 junior high school male futsal players aged 14-16 years. This research was conducted in 16 meetings for six weeks, three times a week. Data collection techniques through tests. The test instrument to determine VO2max uses a multistage fitness test (MFT). The test results showed that the pretest average was 29.85, while the posttest average was 33.74. These results indicate an increase in the VO2max value of 3.89 (ml/kg/min). Then the data were analysed using a paired sample t-test to answer the research hypothesis. The results show a significance value of 0.000 <0.05. So it can be concluded that Tabata Training significantly increases the VO2 max of futsal players. The limitations of this study are not fully controlled for the research subjects.
Fatigue Index Analysis in Student Soccer Clubs after 45 Minutes of Soccer Match
Authors: S Wedi , Sinulingga Andrew Rinaldi
Published: December 2023

The purpose of this study was to determine and see the value of the fatigue index in student football athletes after playing a match for 45 minutes in the first halfs. This study used a quantitative descriptive method with 22 sample. The instrument used in this study is the Running-based Anaerobic Sprint Test (RAST), which is a test carried out by sprinting with a distance of 35 meters for 6 repetitions and a 10 second rest interval for each repetition performed by the athlete. The test results showed that from 22 students who played soccer for 45 minutes, 15 students (68.18%) had a high fatigue index value, while 7 students (31.82%) had a low fatigue index value. Based on the results of data analysis and discussion, it can be concluded that 15 out of 22 people (68.18%) of student soccer athletes after playing a soccer match for 45 minutes in the first half had a high fatigue index value.
Understanding Physical Literacy of Physical Education Teachers
Authors: Apriliyanto Rizki , Sulaiman Ahmad
Published: December 2023

The purpose of this study is to ascertain how well physical education teachers comprehend physical literacy. The "perceived physical literacy instrument" (PPLI), which has nine items and a validity level of 0.82, is used to test one's comprehension of physical literacy (very good). Purposive sampling is a strategy used to obtain data. A questionnaire based on the PPLI instrument was distributed to 53 physical education instructors in the Jember area in order to gather knowledge data on physical literacy. Overall survey findings revealed that out of 187 questions, (18.86%) of respondents Sangat Setuju d, (42.7%) of respondents Setuju d there were 204 questions, and (18.86%) of respondents indicated they were unsure about the answers to 90 questions. The results indicate that some teachers have a limited grasp of the idea of physical literacy. This explains why physical education lessons must help teachers better comprehend and cultivate physical literacy. Even if physical education instructors' degree of understanding of physical literacy is known, other measurements must be taken to determine the total competency in physical literacy, such as physical competence, motivation, and self-confidence. Given that there are four areas of physical literacy that might be explored or investigated in the future.
Gender and Social Support for Sports among Vocational Schools Studets in Indonesia
Authors: Syah Nur Rahmad , Rosidi Sakban , Lani Ahmad
Published: December 2023

With the jargon "SMK Bisa", the government has high hopes for vocational schools. However, this hope has not been supported by policies to improve students' physical fitness. This secondary research analyzes gender and social support data from 1,320 vocational school students. Data were analyzed using the t-test technique for a single sample and two independent samples. The results of this research are: social support for sports activities is not yet categorized as good, social support for sports activities for male and female students is not yet categorized as good, there are differences in social support for sports activities for male and female students.
Sport Development Strategy for Rock Climbing at Central Bengkulu Regency
Authors: Prabowo Andika , Raibowo Septian , Nopiyanto Yahya Eko , Permadi Andes , Rizky Oddie Barnanda
Published: December 2023

This study aimed to formulate a sports development strategy for rock climbing on the Kandis Hills in central Bengkulu. A descriptive qualitative approach was used in the design of this study. This research began with the identification and analysis of the disease's internal environment (strengths and weaknesses) and formative external environment (opportunities and threats). This study used his SWOT analysis with IFAS and EFAS matrices. The instruments of this study were interviews, observations, questionnaires, and documents. The study sample consisted of 2 individuals from interview data collection and observation by subject sampling techniques and 30 respondents from a questionnaire. As a result of the study based on SWOT analysis, the researchers found that tourism sport climbing cliffs on Kandice Hill in quadrant I had an internal factor value of +0.4 and an external factor value of +0.68 in the SO strategy (between external and external factors). I discovered something. Internal Opportunities) Sport Climbing Tourism's strategic location in Bukit Kandis provides opportunities and strengths to maximize existing opportunities.
Profile of Lower Limb Muscle Power in Pencak Silat Athletes of IPSI Pekalongan City
Authors: Wijaya M. Riski Adi , Subekti Nur , Widodo Agung , Wijaya M. Bintang Saputra
Published: December 2023

The study aims to analyze the lower limb muscle power profile of Pencak Silat athletes affiliated with IPSI in Pekalongan City in preparation for the Provincial Sports Week (PORPOV) in 2023. Anticipated is that this study will offer a deeper insight into the determinants that impact athletes' achievements in the realm of Pencak Silat competition. The study utilizes a survey research design with a quantitative descriptive approach. The study subjects consist of five athletes who qualified for the 2023 PORPOV. Data collection involves the use of a lower limb muscle power test, specifically the vertical jump test. The results of the vertical jump test for Pencak Silat athletes from IPSI in Pekalongan City indicate that 20% or one athlete falls above the average classification, 60% or three athletes fall within the moderate classification, and 20% or one athlete falls below the average classification. The findings of this study reveal that about 80% of the lower limb muscle power component possessed by the athletes hasn't reached the classification above the average. The research's conclusion offers valuable insights into the factors affecting Pencak Silat athletes' performance, providing a basis for improving training programs to boost the achievements of IPSI-affiliated athletes in Pekalongan City.
Indonesian Physical Fitness Test (TKJI) Conversion Assessment Application Program for Vocational School Students
Authors: Hidayat Hidayat , Rohman Ujang , Cholid Abd.
Published: December 2023

This research aims to develop TKJI assessment software that is converted through the TKJI test application which is integrated via computer. The research method is research and development, namely developing the TKJI test assessment application through stages 1) analyzing product needs, 2) developing initial products, 3) carrying out expert validation, 4) carrying out trials, 5) revising the product, 6) product final research sample of class XII students taken randomly (ramdom). The results of the validation and testing of the TKJI application are; 1) in terms of the quality of the TKJI application, the material content quality is 97.11%, the media quality is 93.75 and the design quality is 98.61%. This shows that the TKJI test application is very feasible and suitable for use. Meanwhile, the student responses were 88.29% for the individual group, 88.75% for the small group and 83.18% for the large group with the very appropriate category. The results of this analysis can be concluded that the TKJI application is declared valid and very suitable for use as a medium for assessing the level of physical fitness for children aged 16 to 19 at the vocational school level.
Inclusive Instruction in Elementary Physical Education: A Study of Teachers' Beliefs and Attitudes
Authors: Sari Merlina , Nazirun Novia , Gazali Novri , Irma Ade , Septiani Desi Yulia , Abdullah Nagoor Meera
Published: December 2023

Teachers' beliefs and attitudes about teaching students with disabilities in a physical education setting are the most important factors in inclusive education, as teachers' attitudes directly influence success in learning. This study aimed to assess physical education teachers' beliefs and attitudes regarding teaching students with disabilities in inclusive primary schools. A qualitative approach was used with a sample of 12 physical education teachers from 24 inclusive education-provider schools in Pekanbaru. Data were collected through semi-structured interviews and observation checklists and analysed using content analysis. Findings showed significant variation in teachers' beliefs regarding the potential of students with disabilities in physical education. While some teachers showed a strong belief in the abilities of these students, others remained sceptical. In addition, some teachers were more confident in teaching students with mild disabilities compared to students with more severe disabilities. These findings underline the importance of improving teachers' understanding of the potential of students with disabilities in the context of physical education. This research contributes to a better understanding of physical education teachers' perspectives on inclusive education, which serves as a basis for improving training and support strategies for teachers who face challenges in teaching students with diverse disabilities. Furthermore, the research highlights the importance of creating an inclusive school environment to support more effective inclusive education practices.
Analysis of Coach’s Leadership Style on Individual Athlete Satisfaction
Authors: Farhansyah Afif , Fitri Mustika , Hamidi Ahmad
Published: December 2023

The coach's leadership has a big influence on the athlete's motivation, enthusiasm, and self-confidence in achieving the set goals. An effective leadership style in a sports context has a significant impact on athlete motivation and performance. Therefore, it is important to understand athletes' perceptions and satisfaction with their coach's leadership style. This study aims to analyze the effect of the coach's leadership style on individual athlete satisfaction by using the Leadership Sport Scale (LSS) questionnaire to measure the coach's leadership style and the Satisfaction Scale For Athletes (SSA) questionnaire to measure athlete satisfaction. This study uses a quantitative descriptive with a  survey test method. The sample in this study were Student-Athletes of UKM Pencak Silat UPI in the sparring category and the single art category and sparring category, totaling 40 people. The results of data analysis show that the coach's leadership style affects individual athlete satisfaction with a percentage of 58%. Based on the results of data processing and statistical analysis in this study, it can be concluded that there is a significant influence between the coach's leadership style and the satisfaction level of individual athletes.
The Influence of Esports on Adolescents' Social Skills
Authors: Mulyadi Djakwan Vici , Fitri Mustika , Williyanto Septian
Published: December 2023

The incredible popularity of video games among teenagers today is a direct result of technological advances over the last few decades. With smartphones that are now more and more available to the general public. Previous research findings are still raising concerns in the eSports community about how teenage eSport players can provide valuable socializing time with peers and family. and esports players show that interacting with friends online is more enjoyable and satisfying than doing it in person. The study aims to test the impact of esports on adolescent social skills. This research is quantitative and correlational. The respondents in this study were teenagers who often played esports games, which amounted to 13 respondents. Selection of research subjects using purposive sampling method. This study uses the Real and Electronic Communication Skills questionnaire (RECS). The data gathered showed that five teenagers had low social skills, four people with adequate social skill, three people with high social skills and one person with very high social skill.
Medya ve Toplumda Göçmen Algısı
Authors: YILDIRIM BAŞOĞLU Meltem
Published: December 2023

Geçmişten günümüze dek süregelen, sosyal bir olgu olarak göç, çeşitli dönemlerde çeşitli politikalarla gerçekleşmiş, her dönemde içerisinde bulunduğu toplumu sosyo-kültürel, ekonomik ve siyasal açıdan etkilemiştir. Çeşitli açılardan etkilenen toplumun, göç ve göçmen algısını etkileyen önemli unsurlardan biri hiç şüphesiz medya olmuştur. Ulusal, uluslararası ya da sosyal medya fark etmeksizin kullanılan dil, haberin sunuluş biçimi, göçmenlerin yerleştirildiği konum, küreselleşen dünyada toplumun göç olgusuna ve göçmenlere karşı bakış açısını olumlu ya da olumsuz biçimde etkilemiş, bu bakış açısında önemli bir yönlendirici konumunda olmuştur. Medya ve toplumda göçmen algısını öne sürmeyi amaçlayan bu çalışma, medyanın kullandığı dil göz önünde bulundurularak toplumda medyanın rolünü ve etkisini teorik bir çerçeve ile ortaya koymuştur. Çalışmada içerik analizi ve Teun Van Dick’ın geliştirmiş olduğu söylem analiziyle Türkiye’de yer alan basılı ve görsel medyada yer alan haberlere, sosyal medyada göç ve göçmenlere yönelik yer alan söylemlere ve göçmen deneyimlerine başvurulmuştur. Kümülatif bir alanda incelenen içerikler analiz edilerek medyanın söz konusu göç ve göçmenlik meselesinde toplum üzerinde nasıl bir etkisi olduğuna odaklanmıştır. Göç olgusu, medya tarafından toplumsal algılama üzerindeki en etkili güç olarak kabul edilir. Medya, göçmenlerin toplumda yarattığı olumsuz algıları pekiştirerek, göçmen karşıtı tutumların oluşmasına neden olabilir. Göçmen karşıtı tutumların temelinde yatan tehdit algısı, ancak göçmenlerle yakın bir temas kuruldukça azalması mümkün olacaktır.
The impact of palliative primary tumor resection on overall survival in minimally symptomatic (asymptomatic) colorectal cancer and synchronous unresectable metastases vs chemotherapy only: a comparative study of outcomes
Authors: Alimova Iu. V. , Achkasov S. I. , Shelygin Yu. A. , Alekseev M. V. , Kashnikov V. N. , Fedyanin M. Yu. , Danilov M. A. , Rybakov E. G.
Published: December 2023

Aim: to evaluate the impact of primary tumor resection (PTR) on treatment outcomes in patients with asymptomatic or minimally symptomatic colorectal cancer (CRC) and synchronous unresectable metastases.

Patients and Methods: treatment outcomes of patients with minimally symptomatic CRC and synchronous unresectable metastases were retrospectively assessed (2016–2022). Patients with PTR followed by chemotherapy were compared to patients receiving chemotherapy only. Survival was determined by the Kaplan-Meier method and differences were evaluated using the log-rank test and Cox proportional-hazards regression model. To reduce potential selection bias between two groups a propensity score matching (PSM) was performed.

Results: no significant differences in 30-day mortality rate (р = 1,00) and the rate of surgical intervention due to complications of first treatment (р = 1,00) between the two groups. Before matching the median survivals were 27,8 and 24 months in the PTR and chemotherapy groups, respectively (р = 0,2). After PSM the overall survival rate at 3 years was 42,1% for the PTR group and 34% for the chemotherapy group (р = 0,47). The median survivals were 27,9 and 24,4 months, respectively. Three-year overall survival rate for patients with stage IVB was significantly higher in the PTR group than in the chemotherapy group (37,8% versus 4,8%; р = 0,02). The median survivals were 36,1 and 17,2 months, respectively. In multivariate analysis radical resection (R0) if unresectable metastases converted into resectable after initial treatment was the only significant prognostic factor for survival (p < 0,001).

Conclusions: PTR in patients with asymptomatic or minimally symptomatic CRC and synchronous unresectable metastases is associated with acceptable postoperative morbidity and mortality rates and may improve overall survival for patients with stage IVB comparing to chemotherapy as a treatment of first line. However, randomized controlled trials are needed.
Individual approach to metastatic colorectal cancer treatment (clinical cases)
Authors: Kit O. I. , Gevorkyan Yu. A. , Soldatkina N. V. , Vladimirova L. Yu. , Popova I. L. , Bondarenko O. K. , Dashkov A. V. , Kolesnikov V. E.
Published: December 2023

Two patients with metastatic colorectal cancer underwent R0 large bowel resection followed by surgery liver and lungs metastases, retroperitoneal lymph nodes and post-op chemotherapy. The total follow-up period of the first patient was currently 12 years, the recurrence-free period was 5 years. In the second patient, stabilization of the disease was observed for 12 years, and the total follow-up period – 18.5 years. An integrated treatment approach to metastatic CRC with active surgery for removable distant metastases or perioperative use of the most effective drug therapy for potentially resectable metastases can control the disease even with an aggressive course.
Emphysema as a complication after transanal endoscopic microsurgery (TEM) (case report and review)
Authors: Khomyakov E. A. , Eryshova T. A. , Kapitanov M. V. , Chernyshov S. V. , Rybakov E. G.
Published: December 2023

Background: transanal endoscopic microsurgery (TEM) is a safe method of local excision of benign tumor and early cancer. Emphysema is rare complication after transanal procedures, occurring only in 1.5%. There is no accepted approach for these patients. AIM: definition and treatment options of ectopic air after TEM.

Materials and Methods: the search was performed using PubMed and e-Library database with the following keywords: «transanal», «emphysema», «microsurgery», «pneumoperitoneum». Data about patients, symptoms, complications, treatment and results were extracted and systematized.

Results: the clinical emphysema rate after TEM was 0,02%. The most frequent symptoms is crepitation in lower abdomen and fever. Increase in C-reactive protein level and leukocytosis — important markers. The method of choice for diagnosis is computed tomography. Management of emphysema symptoms is possible with conservative methods.

Conclusion: the accumulation of experience in the treatment of emphysema after TEM will allow a unified approach of managing these patients.
Granular cell tumor of the perineum (clinical case)
Authors: Shakirov R. R. , Karpukhin O. Yu. , Ziganshin M. I. , Raginov I. S.
Published: December 2023

Aim: to present a clinical case of a rare granular cell tumor (Abrikosov’s tumor) with perianal site.

Patients and Methods: a patient had a slowly progressive growth of a perianal tumor. The tumor with dimensions of 40 × 30 mm intimately adheres to the lower ampullary rectum and anterior portion of m. levator ani, no signs of malignant transformation occurred. Trepanobiopsy was performed followed by immunohistochemical study. The biopsies contain mainly fibrous tissue and clusters of cells with rounded nuclei and granular cytoplasm. Immunohistochemistry showed diffuse positive cytoplasmic reaction with antibodies to S100. The tumor was positive for CD8, vimentin and negative for GFAP. The expression of the Ki67 protein was 2%. Diagnosis: granulocellular tumor (Abrikosov’s tumor), the tumor was removed by perineal access.

Resultss: the removal of the tumor, originating from the low rectum, was performed with perineal access and with the restoration of the muscular layer of the bowel wall. No complications occurred, patient discharged 5 days after surgery.

Conclusion: Abrikosov’s tumor is a rare benign neoplasm. Surgery is possible in coloproctological units with sufficient level of surgeons.
Problems of preoperative diagnosis of pelvic lymph node lesions in rectal cancer (review)
Authors: Alekseev M. V. , Khomyakov E. A. , Rybakov E. G.
Published: December 2023

Background: metastasis in lateral pelvic lymph nodes (LPLN) occurred in 6–15% of patients with middle or low rectal cancer. Currently there are still no criteria of diagnosis of this. There is no generally accepted management this group of the patients.

Aim: to systematize the available literature data about lateral pelvic lymph node dissection in patients with rectal cancer.

Materials and Methods: literature search was performed in the PubMed and e-Library databases using the keywords: LLND, lateral lymph node, rectal cancer, lymphodissection. The search date: July 2023.

Results: preoperative CRT with total mesorectumectomy supplemented with selective LTLD for suspected metastases seems to be a rational strategy to achieve a favorable oncological treatment outcome.

Conclusion: Additional studies are required.
Efficacy and safety of hybrid laparo-endoscopic surgery for colon tumors (systematic review and meta-analysis)
Authors: Kolosov Alexey V. , Achkasov S. I. , Surovegin E. S. , Khryukin R. Yu. , Likutov A. A. , Sushkov O. I.
Published: December 2023

Aim: to compare the efficacy and safety of hybrid laparo-endoscopic operations and laparoscopic segmental colectomy for benign endoscopically non-removable colorectal tumors.

Materials and Methods: systematic review and meta-analysis included 17 studies which evaluate the results of hybrid laparo-endoscopic procedure (main group) and laparoscopic segmental colectomy (control group). The study included 835 patients — 517 in main group and 318 controls.

Results: operation time was significantly lower in main than in control group (mean difference = −38,7 minutes; 95% CI: −51,4 — −26, p < 0,00001). There was significant difference in postoperative hospital stay. It was shorter in main group (mean difference = −2,3 days; 95% CI: −3,17 — −1,57, p < 0,00001). There was not significant difference between odds ratio of postoperative morbidity (OR = 0,7; 95% CI: 0,38–1,53, p = 0,44), mortality (OR = 0,4; 95% CI: 0,07–3,11, p = 0,43) and local recurrence rate as well (OR = 2,8; 95% CI: 0,68–11,35, p = 0,15).

Conclusion: the hybrid laparo-endoscopic technique patients with benign endoscopically non-removable colon tumors does not increase the postoperative morbidity and mortality. At the same time, the hybrid technology reduces the operation time and postoperative hospital stay.
Morpho-functional aspects of various parts of the intestine and risk factors associated with the preventive ileostomy (review)
Authors: Maksimkin A. I. , Bagatelia Z. A. , Gordienko E. N. , Emelyanova E. B. , Sakaeva D. M.
Published: December 2023

Currently, there is no clear answer which option of preventive intestinal stoma should be preferrable after low anterior resection for rectal cancer. The aim of this review was to search predictors of complications of preventive ileostomy. The disorders occur after ileostomy like dehydration, loss of electrolytes, and prerenal acute renal failure, are due to a deficiency of microvilli remaining in the digestion of the small intestine, as well as the inability of the intestine to adapt to new conditions.
COMMENTS Maksimkin A.I., Bagatelia Z.A., Gordienko E.N., Emelyanova E.B., Sakaeva D.M. Morpho-functional aspects of various parts of the intestine and risk factors associated with the preventive ileostomy (review)
Authors: Editorial Article
Published: December 2023

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Metabolism in the large intestine wall after injury of the thoracic spinal cord (experimental study)
Authors: Baleev Mikhail S. , Kiseleva E. B. , Bederina E. L. , Loginova M. M. , Shirmanova M. V. , Fraerman A. P. , Scheslavsky V. I. , Gladkova N. D. , Ryabkov M. G.
Published: December 2023

Ailm: to assess metabolic processes in the serous layer of the large intestine in the acute period of spinal injury.

Materials and Methods: the experiment was carried out on laboratory animals — Wistar rats (n = 20). Spinal injury was simulated by complete transection of the spinal cord at the level of Th5-Th6 vertebrae. Metabolic changes in the intestinal wall were assessed before injury, 3 and 24 hours after spinal cord transection. Metabolism was assessed in vivo using fluorescence time-resolved macroimaging technology (macroFLIM) by autofluorescence in the spectral channel of the metabolic cofactor NAD(P)H.

Results: a significant (p = 0.041) increase in the mean fluorescence lifetime (τm) by 12% and the lifetime of the long component (τ2) of the NAD(P)H cofactor by 13% (p = 0.008) was detected 24 hours after injury. MacroFLIM showed an increase in the intensity of metabolism in the large intestine wall.

Conclusion: for the first time in an in vivo experiment, it has been shown that the acute period of spinal injury is accompanied by an increase in metabolic activity in the tissues of the large intestine. The revealed phenomenon confirms the role of the large intestine in compensatory reactions to spinal injury and open up new possibilities for therapy in the acute period of spinal cord injury.
Value of computed tomography and abdominal ultrasound for chronic inflammatory complications of diverticular disease
Authors: Belov D. M. , Zarodnyuk I. V. , Trubacheva Yu. L. , Moskalev A. I. , Maynovskaya O. A.
Published: December 2023

Aim: to evaluate the diagnostic value of computed tomography (CT) and abdominal ultrasound (US) for chronic inflammatory complications in patients with diverticular disease (DD).

Patients and Methods: the prospective cohort study included 50 patients with complicated DD. All patients underwent preoperative abdominal CT with intravenous contrast and abdominal US, with further elective bowel resection. The results of CT and ultrasound were compared with morphology of the removed specimens.

Results: the sensitivity and specificity for chronic diverticulitis was 66.7% and 95.7% for CT and 100.0% and 95.7% for US. For chronic pericolic abdominal mass it was 94.8% and 90.9% for CT, 94.8% and 100.0% for US; for abdominal abscesses/cavities it was 87.5% and 96.2% for CT and 91.6% and 100.0% for US; for diverticular fistulas it was 87.5% and 100.0% for CT and 87.5% and 100.0% for US. No significant differences were obtained between two diagnostic modalities. A high level of consistency (κ-coefficient 0.71) of CT and US for the diagnosis of inflammatory complications of DD was found. Conclusion: CT and US have a similar high diagnostic value for chronic inflammatory complications of DD. Each of them can be used as a single diagnostic modality or both depending on the clinical case.
Outcomes of multimodal treatment including preoperative chemotherapy for upper rectal cancer
Authors: Dobrodeev A. Yu. , Tarasova A. S. , Afanasiev S. G. , Kostromitsky D. N. , Ponomareva A. A. , Babyshkina N. N.
Published: December 2023

Aim: to analyze outcomes of multimodal treatment including preoperative chemotherapy with FOLFOX 4 regimen in patients with upper rectal cancer.

Patients and Methods: the pilot study included 24 patients. Stages II and III were confirmed in 2 (8.3%) and 22 (91.7%) patients, respectively. All patients underwent 3 cycles of chemotherapy in FOLFOX 4 regimen followed by surgery. In the postoperative period, patients with T4 and N+ underwent adjuvant chemotherapy administered over 6 months including the time of preoperative treatment.

Results: all patients completed preoperative chemotherapy with the FOLFOX 4 regimen. The toxicity of chemotherapy was 38.9%; adverse events did not exceed grades I-II. Partial tumor regression (RECIST 1.1 criteria) was achieved in 18 (75.0%) patients. All patients underwent surgery 4 weeks after chemotherapy. Postoperative complications occurred in 4 (16.7%) patients, 1 (4.2%) had grade IIIb complication (Clavien-Dindo scale), which required re-surgery. Pathological complete response (TRG1 by Mandard scale) was revealed in 1 (4.2%) patient. Thirteen patients (54.2%) received adjuvant chemotherapy. The mean follow-up was 38 (17-54) months. Three patients (12.5%) developed local recurrence and 4 (16.7%) patients — distant metastases. The 3-year overall and diseasefree survival rates were 91.7% и 79.2%, respectively.

Conclusion: multimodal treatment including preoperative chemotherapy with the FOLFOX 4 regimen was well tolerated and produced tumor regression with high 3-year survival rates in patients with upper rectal cancer.
Hybrid methods treatments for III and IV grade hemorrhoids
Authors: Zagriadskiǐ E. A.
Published: December 2023

Aim: to evaluate hybrid techniques in patients with stage III and IV hemorrhoids.

Patients and Methods: from January 2017 to December 2021, 154 patients with external and internal hemorrhoids of the 3rd and 4th stages were treated at the Moscow Medical Center “ON CLINIC”, including men — 118 (76.6%) and women — 36 (23.4%), aged of 45.8 ± 10.3 (27–72) years. The history of the disease was 8.8 ± 2.2 (5–15) years. All patients underwait transanal dearterialization with mucopexy. With its inefficiency, a hybrid operation technique was performed.

Results: all patients were operated under spinal anesthesia in a one-day hospital. Operation time was 38.05 ± 4.7 (27–55) min. Postoperative pain syndrome on the first day was 34.1 (30–40) mm on the VAS scale, due to the elective use of Ketorolac tromethamine, 30.1 ± 1.2 (30–40) mg. By the 5–6th day, the pain syndrome decreased to 24.2 (20–30) mm and 15.3 (0–30) mm. Hospital stay was 24.5 ± 2.3 (21–38) hours. The mean period of disability was 12.8 ± 3.1 (10–14) days. When comparing the clinical results of treatment with a follow-up period of 29.9 months, there was no progression of the disease manifestation.

Conclusion: the use of hybrid techniques in the treatment of complex forms of hemorrhoids allows to minimize trauma of the anal canal and to reduce the rehabilitation period.
The learning curve for transanal hemorrhoidal dearterialization with mucopexy. Experience of 459 cases
Authors: Matveev I. A. , Aliev F. Sh. , Matveev A. I. , Morozova L. A. , Povarnin N. N. , Dgebuadze V. T. , Tarasenko V. V. , Chorba K. M.
Published: December 2023

Aim: to evaluate learning curve for transanal hemorrhoidal dearterialization (THD) with mucopexy for chronic hemorrhoids II-IV stage.

Patients and Methods: the THD was performed by one surgeon in 459 patients under local anesthesia in 2013- 2021. Patients were aged 45 (37;54) years, 355 (77.3%) — males. Stage II was diagnosed in 85 (18.5%) cases, stage II-III — in 47 (10.2%), stage III — in 296 (64.5%), stage III-IV and IV — in 27 (5.9%) and 4 (0.9%) cases. Regression and CUSUM analysis were used to construct the learning curve. The operation time, postoperative morbidity and recurrence rate were assessed.

Results: the operation time was 25 (25;32.5) minutes, it was achieved on 210 cases. The postoperative complications occurred in 7 (1.5%) cases and were significantly often in stage III-IV and IV — 3 (9.7%) cases (p = 0.001). Recurrence was showed in 29 (6.3%) cases after 1 year of follow-up. The CUSUM function graph showed that with the experience level, a 2-fold decrease in the morbidity rate and recurrence rate was achieved after 24 and 28 procedures, respectively. When experience is achieved, the morbidity rate was low regardless of the disease stage. Despite the experience obtained, in patients operated in the 3rd and 4th quartiles, the recurrences occurred in 10 (7.7%) and 9 (8.8%) patients, respectively.

Conclusion: the indicator of experience obtained is the decrease of operation time and post-op morbidity. The experience level dies not affect recurrence rate in stages III-IV due to limitations of the technique.
The first experience of robot-assisted vental mesh rectopexy using the Senhance® system in the treatment of patients with obstructive defecation syndrome
Authors: Khitaryan A. G. , Golovina A. A. , Veliev K. S. , Mezhunts A. V. , Alibekov A. Z. , Orekhov A. A. , Khitaryan V. A. , Oplimah K. S.
Published: December 2023

Aim: to assess primary results of robot-assisted ventral mesh procedure using the new Senhance® robotic system for obstructive defecation syndrome.

Patients and Methods: the prospective cohort study included patients who underwent robot-assisted ventral mesh rectopexy with the Senhance® system for obstructive defecation syndrome caused by rectocele and/or rectal prolapse and/or internal intussusception. The optimal trocar sites, the location of robotic arms, operation time and intraoperative blood loss were evaluated, as well as post-op morbidity rate (Clavien-Dindo scale), pain intensity (VAS scale) and recurrence rate.

Results: the study included 22 patients. Operation time was 87.1 ± 24.3 minutes. The intraoperative blood loss was 19.8 ± 9.6 ml. No conversion to open or laparoscopic approach occurred, no morbidity occurred. Pain intensity on day 1 was 0.255 mm according to VAS. No anatomical recurrence was revealed. The median follow-up period was 20.4 months (7–22 months).

Conclusion: robotic-assisted ventral rectopexy using the Senhance® system is effective and safe. The results are similar to laparoscopic ones. However, the use of the Senhance® system is cost effective compared to other robotic systems.
Foreign body of the colon (case report)
Authors: Davidov M. I.
Published: December 2023

Aim: to present a clinical case and a literature review.

Patient and Methods: a 39-year-old man admitted to the clinic with abdominal pain, vomiting, urge to defecate, hiccups. He reported that a group of people forcibly injected him with an object through the anal canal. General check-up, chest and abdominal X-ray were done. The diagnosis was established: a foreign body of the rectum, sigmoid and colon. Under anesthesia, transanal removal of a foreign body was performed — a fragment of a pipe made of polymer materials with a length of 55 cm, a diameter of 6.5 cm.

Results: the item was extracted completely without complications. After 2 years, the man is healthy. In the world literature, we did not find reports of such a large length of transanally removed objects.

Conclusion: in the absence of peritonitis and perforation of the intestinal wall, transanal removal of a foreign body of the rectum and colon under anesthesia may be the method of choice.
A Case-Study Comparison of Machine Learning Approaches for Predicting Student’s Dropout from Multiple Online Educational Entities
Authors: Porras José Manuel , Lara Juan Alfonso , Romero Cristóbal , Ventura Sebastián
Published: December 2023

Predicting student dropout is a crucial task in online education. Traditionally, each educational entity (institution, university, faculty, department, etc.) creates and uses its own prediction model starting from its own data. However, that approach is not always feasible or advisable and may depend on the availability of data, local infrastructure, and resources. In those cases, there are various machine learning approaches for sharing data and/or models between educational entities, using a classical centralized machine learning approach or other more advanced approaches such as transfer learning or federated learning. In this paper, we used data from three different LMS Moodle servers representing homogeneous different-sized educational entities. We tested the performance of the different machine learning approaches for the problem of predicting student dropout with multiple educational entities involved. We used a deep learning algorithm as a predictive classifier method. Our preliminary findings provide useful information on the benefits and drawbacks of each approach, as well as suggestions for enhancing performance when there are multiple institutions. In our case, repurposed transfer learning, stacked transfer learning, and centralized approaches produced similar or better results than the locally trained models for most of the entities.
Low-Frequency-Noise Attenuation through Extended-Neck Double-Degree-of-Freedom Helmholtz Resonators
Authors: Gautam Abhishek , Celik Alper , Azarpeyvand Mahdi
Published: December 2023

The use of acoustic liners, based on double-degree-of-freedom Helmholtz resonators, for low-frequency-noise attenuation is limited by the volume of individual resonating cavities. This study investigates the effect of the septum neck length on the acoustic performance of double-degree-of-freedom resonators, both experimentally and numerically, for varying cavity volume ratios. The underlying sound attenuation mechanism is studied by analysing the acoustic pressure fields within the resonator cavities. An increase in the septum neck is shown to lower the frequencies affected by the resonator. In addition, it deteriorates and significantly improves the sound attenuation performance at the primary and secondary peak transmission-loss frequencies, respectively.
Energy and Arginine Density in the Diets of Arbor Acre Hens from 40 to 50 Weeks of Age: Effects on Development and Lipid Metabolism of Embryos
Authors: Wang Zhongyu , Feng Jiawei , Yang Chunxu , Mou Shaoyang , Xie Yingjie , Duan Xiaoxue , Li Zhongyu , Bi Zhongpeng , Liu Tianshu , Li Feng , Xu Liangmei
Published: December 2023

The effects of maternal dietary energy and arginine level on embryonic development and serum lipid metabolism were investigated in this study. A 2 × 3 factorial experiment was conducted with six treatments represented by 10 replicates of eight Arbor Acre broiler breeder hens each. Diets fed from 40 to 50 weeks of age were formulated to contain two digestible arginine levels (9.6 g/kg and 14.5 g/kg) and three metabolic energy levels (10.08 MJ ME/kg, 11.88 MJ ME/kg, and 13.68 MJ ME/kg). Artificial insemination was used, and eggs collected from 50 weeks of hens’ age were hatched. Embryonic growth, biochemical and endocrine indexes of embryonic serum and allantoic fluid were measured on different embryonic days (E). The results were as follows: Egg weight (E0, E11, E13) and embryonic weight (E12, E15) in the high-energy group (13.68 MJ ME/kg) were significantly decreased (p < 0.01), as were embryonic breast rate (E13, E15, E21), thigh rate (E13–E21) and liver rate (E15–E21). The reciprocal effects of arginine and energy were significant on breast rate (E11, E13, E17), thigh rate (E19, E21) and liver rate (E11, E19) of the embryo (p < 0.05). CHO (E13–E19), high-density lipoprotein (E13, E15, E21), low-density lipoprotein (E15, E19, E21), and blood glucose (E13) levels in embryonic serum decreased with the increase in maternal dietary energy level (p < 0.05), but triglyceride levels (E19, E21) showed the opposite result (p < 0.05). The levels of cholesterol and blood glucose in embryonic serum at E11 and urea nitrogen in allantoic fluid at E11–E15 were significantly decreased in the 14.5 g/kg arginine group (p < 0.01). With the increase in maternal dietary energy and arginine levels, embryonic serum nitric oxide synthases levels (E11, E15, E19) increased significantly (p < 0.01). The reciprocal effect of arginine and energy in maternal diets was significant on the embryonic serum high-density lipoprotein level at E21 (p < 0.05). Embryonic serum insulin levels at E13 were significantly elevated in the high-energy group (13.68 MJ ME/kg). The reciprocal effect of arginine and energy was significant on the embryonic serum growth hormone level (p < 0.01). Embryonic serum growth hormone levels were significantly reduced in the 14.5 g/kg arginine and 13.68 MJ/kg metabolic energy group (p < 0.01). In conclusion, maternal restricted feeding improved embryonic development and regulated lipid metabolism-related indices in embryonic serum. Maternal dietary addition of digestible arginine had a significant effect on lipid metabolism indices in embryos. There was a maternal effect of maternal dietary energy and arginine levels on embryo growth and development. The deposition of maternal nutrients affects the development of embryos.