bluuebunny/crossref_metadata_2025 huggingface dataset:
Long-Term Impacts on Clinical Practice Along the HIV Care Continuum: Addressing Workforce Gaps Through a Clinician Scholars Program
Authors: Carlberg-Racich Suzanne , Rivero Ricardo , Wagner Cornelia M. J. , Schechtman Barbara , Alabduljabbar Salma A. , Sherer Renslow , Hasnain Memoona , Gier Emma , Linsk Nathan L.
Published: June 2024

The Clinician Scholars Program (CSP) was designed to expand the HIV care workforce by improving the clinical capacity of clinicians in underserved areas. This evaluation assessed program participants' long-term practice changes and system changes. The year-long program combined mentoring, training, and on-site clinical observation. Qualitative interviews (N = 46) were conducted with Scholars at least 2 years following CSP, supplemented by a 2023 survey. Multiple coders analyzed transcripts using open coding. Thematic analysis explored practice changes and efforts to move patients along the HIV care continuum. Findings indicate positive long-term impacts of CSP regarding the HIV care continuum and care system engagement. Over 90% of Scholars remained working in HIV care, with 75% maintaining or increasing patient loads and 72% making changes to their clinical practice. This training model appears to enhance care along the HIV care continuum and may be adaptable to other contexts that address complex chronic conditions.
Value-Driven Adaptations of Mesolimbic Dopamine Release Are Governed by Both Model-Based and Model-Free Mechanisms
Authors: Robke Rhiannon , Arbab Tara , Smith Rachel , Willuhn Ingo
Published: June 2024

The magnitude of dopamine signals elicited by rewarding events and their predictors is updated when reward value changes. It is actively debated how readily these dopamine signals adapt and whether adaptation aligns with model-free or model-based reinforcement–learning principles. To investigate this, we trained male rats in a pavlovian-conditioning paradigm and measured dopamine release in the nucleus accumbens core in response to food reward (unconditioned stimulus) and reward-predictive conditioned stimuli (CS), both before and after reward devaluation, induced via either sensory-specific or nonspecific satiety. We demonstrate that (1) such devaluation reduces CS-induced dopamine release rapidly, without additional pairing of CS with devalued reward and irrespective of whether the devaluation was sensory-specific or nonspecific. In contrast, (2) reward devaluation did not decrease food reward-induced dopamine release. Surprisingly, (3) postdevaluation reconditioning, by additional pairing of CS with devalued reward, rapidly reinstated CS-induced dopamine signals to predevaluation levels. Taken together, we identify distinct, divergent adaptations in dopamine-signal magnitude when reward value is decreased: CS dopamine diminishes but reinstates fast, whereas reward dopamine is resistant to change. This implies that, respective to abovementioned findings, (1) CS dopamine may be governed by a model-based mechanism and (2) reward dopamine by a model-free one, where (3) the latter may contribute to swift reinstatement of the former. However, changes in CS dopamine were not selective for sensory specificity of reward devaluation, which is inconsistent with model-based processes. Thus, mesolimbic dopamine signaling incorporates both model-free and model-based mechanisms and is not exclusively governed by either.
Parametric Screening of Fermentation Conditions for Protease Production from Pineapple Waste
Authors: Sivanesan Pavethra , Tang Gao Han , Mohd Arshad Zatul Iffah , Che Man Rohaida , Abdul Mudalip Siti Kholijah , Sulaiman Siti Zubaidah , Md Shaarani Shalyda
Published: June 2024

Pineapple waste is abundant in cellulose, hemicellulose, lignin, complex carbohydrates, and protein. One simple way to use pineapple waste as a substrate is to utilize it with the probiotic beverage to produce enzymes through submerged fermentation. Studies on fermentation using pineapple waste have mainly focused on cellulose, xylanase, and pectinase, with little information on protease fermentation. Future studies on pineapple waste-based protease fermentation should be conducted. The present work aims to investigate the significant process parameters affecting protease fermentation from pineapple waste. The parametric screening was performed using the two-level fractional factorial design by Design Expert 7.1.6. In this work, four process parameters were manipulated for protease fermentation which is incubation time from 24 hours to 72 hours, temperature from 20.0 °C to 40.0 °C, substrate concentration from 10.0 % to 30.0 % and pH value from 4.0 to 8.0. The result showed that the most significant process parameters affecting protease fermentation were temperature, pH value and incubation time. This study investigated that the highest protease activity, 0.118 U/mL can be obtained with 48 hours of incubation time, 30.0 °C of temperature, 20.0 % of substrate concentration and pH 6.0.
Becoming a Mother as a Teenager: Self-Acceptance of Adolescent Girls Who Choose to Get Married
Authors: Putri Anisatu Balqis  , Sugiariyanti
Published: June 2024

Age is one of the essential aspects of everyone's life, including physiological considerations of health and psychological states. At each stage of development, in line with age, a person will face tasks and challenges in life. It is the same as when someone is married, where age also determines the readiness and acceptance of new roles. This study describes the self-acceptance of adolescent girls who do early marriage and motherhood at a young age. The research sources comprised six people, of which two were primary subjects and four were significant others. The criteria for participants used in this study are adolescent girls who married under the age of 19 and have children from the marriage. The method used in this research is qualitative with a phenomenological approach. This research shows that primary informant 1 has good self-acceptance because she can interpret the situation and be responsible for her decisions. Interpret the problem, take responsibility for the decisions, and adjust to her roles as wife and mother. Meanwhile, self-acceptance in primary informant 2 is not good enough because she has yet to view the situation positively and adapt to her role as a wife and mother.
Characteristics of Banana Stem Adsorbent (Musa Paradisiaca) For Biogas Purification With Variation of Adsorption Contact Time
Authors: Purba Elida , Safitri Ferina
Published: June 2024

The features of the adsorbent utilized for biogas purification are covered in this study. The aim of this study was to investigate the features of the banana stem adsorbent that may be applied to the adsorption process for the purification of biogas. The research involved the preparation of banana stem powder, the removal of lignin, the creation of adsorbents, and the purification of biogas using the adsorption technique. The adsorption contact time variations used were (30; 60; 90) minutes, with a biogas flow rate of 1 l/minute and a banana stem particle size of 20 mesh. Samples were analyzed by lignocellulosic content analysis, FTIR (Fourier Transform Infrared Spectroscopy), SEM (Scanning Electron Microscope), and Gas Chromatography. According to the research findings, the adsorbent made from banana stems that can be used to purify biogas has a cellulose content of 47.5%, in the FT-IR analysis there is a shift in the peak number of stretching in the hydroxyl and carboxylic acid functional groups and has a surface structure of banana stem fiber that is orderly. The longer the contact time in the biogas purification process utilizing banana stem adsorbent with variations in adsorption contact time acquired, the more CO2 was adsorbed and the higher the CH4 concentration in the purified biogas. The biogas purification process resulted in a 39.893% reduction in CO2 content and the best contact time to produce the largest CH4 content was 90 minutes with the resulting CH4 content of 64.786%.
Development of Microbial Fuel Cell in Tofu Liquid Waste in Producing Clean Energy
Authors: Tiara Ansia , Ramadhani Safira Redzy , Tuhuloula Abubakar
Published: June 2024

The high need of Indonesian people for electrical energy has led to an increase in energy demand. This has triggered research efforts based on renewable technologies that are efficient and environmentally friendly. One of the renewable energy sources that is widely developed is Microbial Fuel Cell (MFC). MFC works by utilizing organic matter used by microbes as an energy source in carrying out metabolic activities. This study aims to determine the effect of Bacillus subtilis and Escherichia coli bacteria with different concentrations of 10% (v/v) and 15% (v/v) on the electrical energy generated from the tofu liquid waste substrate and observe changes in pH and Biological Oxygen Demand (BOD) in the MFC system. This research method consists of several steps, namely the preparation of electrolysis equipment, electrodes, substrates, bacterial cultures, electrolytes and MFC processes. The maximum value of voltage and current in Bacillus subtilis bacteria occurred at the 10 hours with 15% (v/v) bacterial concentration which amounted to 394 mV and 10.6 mA with a bacterial population of 16.15 × 109 CFU/mL and a power density value of 126.67 × 10-4 watt/m2. Furthermore, the maximum value for Escherichia coli bacteria occurred at the 10 hours with a voltage and current of 266 mV and 5.3 mA with a bacterial population of 15.60 × 109 CFU/mL and a power density value of 55.67 × 10-4 watts/m2. The pH value of the substrate variations with the addition of Bacillus subtilis bacteria ranged from 5-6, while with the addition of Escherichia coli bacteria variations ranged from 4-5. This system also reduces the value of biological oxygen demand.
Syngas Production from Updraft Co-Gasification Process Using Compost, Coffee Husk, and Coal as a Raw Materials
Authors: Dewajani Heny , Zamrudy Windi , Ariani Ariani , Arianto Anang , Nur Abror Falah Muhammad
Published: June 2024

The coffee husk biomass from plantation products and compost from household waste processing is currently underutilized. Therefore, efforts are needed to enhance the value of compost and coffee husk as raw materials for producing syngas through co-gasification processes. Due to the low calorific values of these materials, it is necessary to add materials with higher calorific values. In this study, low-quality coal was used for this purpose. The research aims to investigate the influence of airflow rate and mass composition of raw materials on the quality of syngas which produced through the updraft co-gasification process. The stages conducted in this study include raw material pretreatment and characterization, gasification process, and syngas analysis. The experimental variables used were the percentage composition of raw materials, consisting of coffee husk and coal, and airflow rates of 10, 15, 20, and 25 liters per minute. The research results indicate that syngas with the highest Lower Heating Value (LHV) was produced from the co-gasification process using raw materials with a composition of 75% coffee husk and 25% coal, along with an airflow rate of 20 liters per minute. The LHV of the syngas was 5045.56 kJ/m3, consisting of 20.28% CO and 6.89% H2.
Synthesis of ZSM-5 From Natural Zeolite Lampung (ZAL) and Rice Husk by Seeding Method using Microwaves
Authors: Ginting Simparmin Br , Putri Erisha , Miranda Thalya , Darni Yuli , Utami Herti , Wardono Herry , Darmansyah Darmansyah , Rustamaji Heri
Published: June 2024

ZSM-5 can be synthesized from Lampung Natural Zeolite (ZAL) and rice husks as a source of additional silica. To speed up the synthesis time, ZSM-5 was synthesized using microwaves. Based on this, the synthesis of ZSM-5 was carried out using microwaves at a temperature of 140 oC with a power of 540 watts with time variations of 10, 15 and 30 minutes with the seeding method as a template replacement of 20%. Amorphous silica with a SiO2 content of 95.324% was extracted from rice husks with a suitable alkali solution. The influence of synthesis time on the formation of ZSM-5 has been carried out. The resulting product was characterized using X-ray Diffraction (XRD), and FTIR (Fourier-Transform-Infrared), Scanning Electron Microscopy (SEM) and BET (Brunaur, Emmet and Teller). The results of the analysis show that the results of the research show that the synthesis of ZSM-5 has been successfully carried out by changing the amorphous phase from natural Lampung zeolite and rice husks into ZSM-5 crystals using microwaves which can shorten the synthesis time 216 - 72 times faster than with heating. conventional, produces high crystallinity, provides small particle sizes with larger surface area, pore volume and pore diameter, and microwave radiation does not damage the Si-O bonds. The best sample was obtained at a synthesis time of 30 minutes with a crystallinity percentage of 96.76% and a specific surface area of 138.616 m2 /g.
Utilization of Fly Ash Palm Oil Mill Waste as an Adsorbent of Methylene Blue in a Fixed Bed Column System by Using Response Surface Methodology
Authors: Sylvia Novi , Dewi Rozanna , Ishak Ishak , Janni Miftahul , Putri Melani Annisa
Published: June 2024

Palm kernel shell combustion waste in boiler units called fly ash (FA) is a low-cost alternative material as an adsorbent. FA contains high levels of silica (SiO2) and aluminium oxide (Al2O3). The content of both compounds is an important component as an adsorbent. FA was used to absorb methylene blue (MB) continuously from synthetic dye wastewater. The study was conducted by continuous system process optimization using Response Surface Methodology (RSM) Box-Behnken design. MB was flowed on a set of fixed-bed adsorption columns with independent variables in this study are X1 (bed height; 8, 12, 16 cm), X2 (contact time; 90, 120, 150 min) and X3 (flow rate; 2, 4, 6L/min). The dependent variables were Y1 (removal efficiency) and Y2 (adsorption capacity) with matrix design by Box-Behnken. Optimisation of MB removal in this study was obtained at X1 = 16 cm, X2 = 150 min and X3 = 2 L/min with removal efficiency of 98.45% and adsorption capacity of 0.115 mg/g. FA pores according to SEM analysis were obtained at 1-2 µm. Likewise, the results of EDX analysis showed that there were N and Cl atoms in FA after the adsorption process. This shows that FA is able to adsorb MB.
Marka ve olumsuz duygular: 1993-2023 yılları arası WoS makalelerinin bibliyometrik analizi
Authors: Özbilek Özcan
Published: June 2024

Bu çalışma, 1993-2023 yılları arasında tüketicilerin duygusal tepkilerini ele alan literatüre genel bir bakış sunmak amacıyla yapılan bibliyometrik bir analize odaklanmaktadır. İncelenen makaleler Web of Science (WoS) veri tabanında yer alan makalelerden oluşmaktadır. Araştırma, makale başlıkları, yazarlar, anahtar kelimeler, özetler ve diğer önemli bilgiler üzerinden kapsamlı bir analiz gerçekleştirmiştir. Ayrıca, araştırmaların gerçekleştirildiği ülkeler, yayınlandığı dergiler ve bu unsurlar arasındaki ilişkiler detaylı bir şekilde incelenmiştir. 1993-2023 yılları arasını kapsayan bibliyometrik analiz sonuçlarına göre, negatif duygular ve marka konusundaki araştırmaların bir artış trendinde olduğu görülmüştür. Özellikle, olumsuz duygular ve marka ilişkisine odaklanan çalışmaların sayısında belirgin bir artış yaşanmıştır. Ayrıca, en fazla atıf alan makalelerin çoğunluğu ABD'den gelmektedir. Türkiye'nin bu alandaki katkısı ise sınırlıdır.
The effect of employees' perception of organizational justice on psychological capital and job satisfaction
Authors: Yetgin Muhammed Ali
Published: June 2024

Employees are the most valuable asset for industries. Therefore, the human factor's labour, effort, and management skills are significant added value for corporate sustainability from a sectoral perspective. Employees contribute to the development of corporate culture, the achievement of corporate goals, and, indirectly, the development of the national economy. In this respect, employees' success is essential for achieving the targeted corporate results. Employees' love for their jobs, adoption of the organization they work for, harmony with their colleagues, and trust in their supervisors will affect the success of their work. The organizational justice approach is a significant driving force behind this success. The primary purpose of this study is to measure the effect of employees' perceptions of organizational justice on their job satisfaction and psychological capital levels. The research covers 451 employees in the education, health, finance, industry, and service sectors. The data obtained from the employees were analyzed using SPSS and AMOS programs, and structural equation modelling was used. As a result, a statistically significant and robust relationship was found between employees' perceptions of organizational justice and their perceptions of psychological capital and job satisfaction. When a workplace environment that will enable human capital to flourish in businesses is created, this capital's current value and productivity will increase.
Examining the relationship between exports and economic growth in Türkiye: Fourier Toda-Yamamoto Granger causality test
Authors: Emek Ömer Fazıl
Published: June 2024

This study aims to investigate the causal relationship between exports and economic growth in Türkiye from 2016:1 to 2023:12, focusing on the validity of the export-led growth hypothesis. The Fourier Toda-Yamamoto Granger Causality Test created by Nazlıoğlu, Gormus and Soytas (2016) was used with variables including total exports and industrial production index derived from monthly data. The data suggest a bidirectional causation between the two variables, indicating that each one is the cause of the other. The export-led growth hypothesis is confirmed in Türkiye for the relevant timeframes. The results of this study align closely with existing research on the topic compared to other studies, further suggesting that decreasing the reliance on imported intermediate items in Turkish export products will enhance the direct connection between exports and economic growth.
Devlet borç temerrüdünün makroekonomik belirleyicileri: Yükselen piyasa ekonomileri örneği
Authors: Moğol Tayfun , Pirdal Burak
Published: June 2024

Bu çalışmada devlet borç temerrütlerinin makroekonomik belirleyicileri araştırılmıştır. Yöntem olarak İkili Tercih Panel Probit Modeli kullanılmış olup ampirik analiz kapsamında yükselen piyasa ekonomileri incelenmiştir. Ekonometrik analizde yıllık veriler kullanılmıştır ve incelenen dönem 1994-2022 yılları arasını kapsamaktadır. Bulgulara göre; devlet borcu temerrüt riski ile cari işlemler dengesi, ABD faiz oranları ve dış borç stoku arasında istatistiki olarak anlamlı ve pozitif bir ilişki tespit edilmiştir. Kişi başı GSYİH büyüme oranı ve doğrudan yabancı yatırımlar ile temerrüt riski arasındaki ilişki ise istatistiksel olarak anlamlı ve negatiftir.
CrowdED 1.0: Statistical Guideline for Designing Optimal Crowdsourcing Experiments
Authors: Zaveri Amrapali , Hernandez Serrano Pedro V , Dumontier Michel
Published: June 2024

Crowdsourcing involves employing a large number of workers, creating HITs (Human Intelligent Tasks), submitting them to a crowdsourcing platform and providing a monetary reward for each HIT. One of the advantages of using crowdsourcing is that the tasks can be highly parallelized, that is, the work is performed by a high number of people in a decentralized setting. The design also offers a means to cross-check the accuracy of the answers by assigning each task to more than one person thus relying on majority consensus as well as rewarding the workers according to their performance and productivity. Since each worker is paid per task, the costs can significantly increase, irrespective of the overall accuracy of the results. Thus, one important question when designing such crowdsourcing tasks that arise is can we estimate apriori - before launching the experiment - how many workers to employ and how many tasks to assign to each worker when dealing with large amounts of tasks. Thus, the main research question we aim to answer is: ‘Can we a-priori estimate optimal workers and tasks’ assignment to obtain maximum accuracy on all tasks?’.We introduce a two-staged statistical guideline, CrowdED, for optimal crowdsourcing experimental design in order to a-priori, via simulations, estimate optimal workers and tasks’ assignment to obtain maximum accuracy for crowdsourcing tasks. We describe the methodology and evaluate it by comparing with real-world experiments and show that the method performs better than random selection of values.
Įmonių socialinės atsakomybės atskleidimo ir pelningumo ryšys Lietuvos biržinėse įmonėse
Authors: Jefimova Emilija Alenksandra , Kalniūtė Deimantė , Kolesnik Gabrielė
Published: June 2024

Disclosure of CSR information can not only makes companies more attractive but also gives them a competitive advantage. Often, engaging in socially responsible activities can lead to increased costs for the company. This paper examines the relationship between corporate social responsibility disclosure and a company's profitability, which can be positive, negative and neutral. The paper presents a methodology for assessing the relationship between corporate social responsibility disclosure and profitability. The study assesses the relationship between corporate social responsibility disclosures and profitability and earnings per share of Lithuanian companies listed on the Nasdaq Baltic Stock Exchange in 2017-2022. The study found that CSR disclosure has no statistically significant relationship with return on assets (ROA), return on equity (ROE) and profitability before interest and tax (EBIT P). However, a positive, very weak statistically significant relationship was found between CSR disclosure and earnings per share (EPS). This may indicate that disclosure of CSR in Lithuanian listed companies increases earnings per share.
Herbai Lietuvos Metrikoje Lietuvos Didžiojoje Kunigaikštystėje XVI amžiuje
Authors: Sipavičiūtė Justina
Published: June 2024

The aim of this article is to analyse the way coats of arms were described in the Lithuanian Metrica. This article takes a deep look at the circumstances that led to the mention of a coat of arms in the Lithuanian Metrica. Was it important for a nobleman of that time to name their coat of arms, and what was depicted on it? And if so, how detailed was its description? Published and unpublished books of the Lithuanian Metrica have revealed a lot of important material about coats of arms. The research has shown that the largest part of the Lithuanian Metrica is made up of files where coats of arms appear on stamps or signets. In case stamps or signets were lost, their owners would be in a hurry to report their disappearance as soon as possible, but most often they could not describe the stamp accurately; at best, they would state that the stamp or signet bore just their coat of arms or their personal coat of arms. No more details would be provided. A smaller proportion of the Lithuanian Metrica not only contains accurate indications of coats of arms depicted on the stamps/signets, but also provides the titles of specific coats of arms. Privileges of bachelorhood that are described in the books of the Lithuanian Metrica are one of the most comprehensive sources describing not just the coats of arms but their colours as well. The files of the Lithuanian Metrica show that women used their father’s coat of arms in their stamps. As we can see in several files of the Lithuanian Metrica, the scribes would occasionally redraw the coats of arms. It was not uncommon for coats of arms to become subjects of disputes in court in case their authenticity was contested.
Adoptarunt et levarunt: Godparents of Illegitimate Children in the 18th Century Vilnius Deanery
Authors: Jonaitytė Ugnė
Published: June 2024

This article explores a previously uninvestigated topic: the role of godparents for illegitimate children in the 18th century Vilnius deanery. The research is based on analysing baptism records from parishes within the Vilnius deanery during this period. The study delves into the selection of godparents for illegitimate children, investigating such factors as the number of godparents present at the baptism and whether they acted as spiritual guardians for multiple illegitimate children. Additionally, it examines the social status of the godparents, analyzing surnames, social standing, and place of residence to determine possible kinship, social, and territorial relations with the parents. Furthemore, the paper explores whether relationships between godparents and illegitimate children extended beyond the formal baptism ceremony.
Singular p-biharmonic problem with the Hardy potential
Authors: Drissi Amor , Ghanmi Abdeljabbar , Repovš Dušan D.
Published: June 2024

The aim of this paper is to study existence results for a singular problem involving the p-biharmonic operator and the Hardy potential. More precisely, by combining monotonicity arguments with the variational method, the existence of solutions is established. By using the Nehari manifold method, the multiplicity of solutions is proved. An example is also given to illustrate the importance of these results.
Exponential synchronization of dynamical complex networks via random impulsive scheme
Authors: Zhou Bowen , Shu Xiao-Bao , Xu Fei , Yang Fengyu , Wang Ya
Published: June 2024

This paper investigates the synchronization of a complex network based on a class of random impulsive differential equation systems. Based on the random impulsive strategy of Poisson distribution, a random impulsive dynamical network model is constructed. Using the Lyapunov principle, random process theory, linear matrix inequality method, and some basic analysis methods, we realize the global mean-square index synchronization of the model. We then get sufficient criteria for the synchronization. By presenting a numerical example, we verified the validity of the theoretical results.
New Data on Marcin Broniowski (Broniewski) and His Tartariae Descriptio (1578)
Authors: Kizilov Mikhail
Published: June 2024

The article is devoted to the biography of the Polish traveller and diplomat Marcin Broniowski (d. 1592), author of Tartariae descriptio (1578), a classic description of early modern Crimea. While working on the article, I discovered a number of previously unknown Polish sources relating to the diplomat’s biography. This allowed me to reconstruct Marcin Broniowski’s biography and the chronology of his visits to Crimea. I also analyse the main early modern editions and translations of Tartariae descriptio, as well as its influence on the history of European geographical thought.
Ötrü ‘against’ in Cun Lord’s Prayer Revisited: An Argument for the Reading utru
Authors: Jankowski Henryk
Published: June 2024

The aim of this article is to demonstrate that the reading ötrü of the postposition which means ‘against’ in the Cun Lord’s Prayer in which it is spelled ⟨utro ⟩ is incorrect and should be amended to utru. The postposition ötrü is used in the Turkic languages not in the meaning ‘against’, but ‘because of, following on’. In addition, it may not follow a nominal in the dative as it appears in the Cun Lord’s Prayer, since ötrü requires the ablative. On the contrary, the opposition utru fulfils both requirements.
Afterword
Authors: Katić Mario
Published: June 2024

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Replacing the involute profile with an improved cycloid profile to improve the bearing capacity for the elliptical gear drives
Authors: Thai Nguyen Hong , Thom Phung Van
Published: June 2024

The involute curve is the most widely used in the design of tooth profiles for non-circular gears (NCGs) because of its mathematical simplicity and convenience for design and manufacture. Still, the condition to avoid undercutting often results in a large number of teeth and a small tooth size that reduces the load capacity of the gear drives. On the other hand, in elliptical gears (EGs), a particular case of NCGs, the unequal radii of the centrodes lead to unequal geometric shapes of the teeth arranged on the gear. To overcome the above phenomena and improve the load capacity of the gear drives in this study, the authors applied the improved cycloid profile as the tooth profile of the centered elliptical gear. The paper analyzes and evaluates to verify the disadvantages of tooth geometry of EG drives with the involute profile. On that basis, an improved cycloid curve is applied to improve the irregularity and increase the teeth size distributed on the gear. Two prototype gear drives with the same centrodes with ellipse involute and improved cycloid profiles were manufactured and experimental. The results showed that the EG drives with the improved cycloid profile allowed the design with fewer teeth than the involute profile to make the tooth size larger. Also, the experimental results showed that the practical versus theoretical gear ratio error value of the EG drives with improved cycloid profile and involute profile is 3.37% and 6.67%, respectively. It verified that the EG drives with the improved cycloid profile meshing process more smoothly than those with the involute profile. The research results are significant for applying and developing the improved cycloid profile in designing and manufacturing EG drives requiring high torque and precision.
Study on fabrication and optical properties of monodisperse Ag-Au alloy nanostructure
Authors: Le Tam , Nguyen Linh , Thapphanya Saonilan , Dinh Giang
Published: June 2024

This study addresses challenges in various fields by creating a new method for uniform, size- and composition-controlled Ag-Au alloy nanoparticles in organic solvents. Building on prior research, we demonstrate control over nanoparticle properties by varying complexing agents, surfactants, and reducing agents. Optimal conditions using surfactant SOA and reducing agent TBAB yielded small, monodisperse Ag nanoparticles ideal for alloying with Au. The reaction time significantly impacts final morphology and surface plasmon resonance (SPR) properties of the resultant Ag-Au alloy nanoparticles. Interestingly, Au nanoparticles formed under identical conditions shared a similar size with 60-minute Ag-Au alloys, evidenced by a single SPR peak at 520 nm. This control over Ag-Au nanoalloy composition and size opens doors for promising applications.
Utilización de residuos sólidos alimentarios como materia prima para alimentación animal
Authors: Itza Ortiz Mateo , Aguilar Urquizo Edgar , Peraza Mercado Gwendolyne , Severino Lendechy Víctor Hugo
Published: June 2024

El objetivo del estudio fue utilizar residuos sólidos alimentarios, generados por la industria maquiladora, como insumo para la elaboración de harina con fines de alimentación de cerdos y determinar la carga bacteriana antes y después de su transformación en insumo alimenticio inocuo. El residuo sólido alimentario fresco se sometió a un proceso de deshidratación para su transformación en harina y posteriormente se peletizó. Se realizaron análisis microbianos de los residuos sólidos alimentarios en fresco, harina y peletizado de acuerdo con las normas mexicanas NOM-109-SSA1-1994 y la NOM-113-SSA1-1994. Se cuantificó la presencia de coliformes, Staphylococcus aureus, Salmonella spp y Listeria monocytogenes. La presencia de Staphylococcus aureus en los residuos sólidos alimenticios en fresco fue 33.30 %, coliformes 14.28 %, Salmonella spp 4.76 %, y Listeria monocytogenes 0 % en comparación con los residuos sólidos alimenticios en harina y peletizado (0.0 %). En conclusión, los residuos sólidos alimentarios en harina pueden ser utilizados como insumo en la elaboración de dietas balanceadas para cerdos con una inclusión de hasta el 45 %. El análisis microbiológico de los residuos sólidos alimentarios en fresco, indicó un porcentaje de microrganismos patógenos muy superiores a los establecidos por las normas. No obstante, el proceso de deshidratación es suficiente para eliminarlos.
O PROFESSOR EBTT: INSTITUCIONALIDADE ORNITORRÍNTICA? FRENTES DE LUTAS NOS GIROS DE UM CALEIDOSCÓPIO
Authors: Santos Ivan , Freitas Kelma Cristina de
Published: June 2024

O presente artigo tem por objetivo analisar, no contexto histórico, a implantação dos Institutos Federais (IFs) e do professor do Ensino Básico, Técnico e Tecnológico (EBTT), buscando problematizar o trabalho docente em sua complexidade. Recorremos a uma revisão integrativa da literatura sobre o tema. Os resultados obtidos mostram que os IFs passam a ocupar papel de destaque no sistema educacional brasileiro, ao oferecer uma proposta de atuação acadêmica verticalizada, ancorada na indissociabilidade entre ensino, pesquisa e extensão, e materializada a partir da criação da carreira EBTT. Esta última, por sua vez, insere-se num espectro que pode oscilar entre os polos da inovação-precarização, sobretudo quando observada frente às demandas do projeto político neoliberal. Nesse sentido, chamamos a atenção para a necessidade de duas frentes de lutas, que corroborem com o fortalecimento da identidade do professor EBTT e do projeto desejado na lei de criação dos IFs. São elas: 1) Consolidação de uma formação político-pedagógica, baseada nos fundamentos estruturantes e princípios educativos da instituição; 2) A construção de uma “resistência por dentro”, que se desdobra na reelaboração crítica do conhecimento público, por meio das ações de ensino, pesquisa e extensão, bem como, na imbricação com as pautas dos movimentos sociais, sindicatos, organizações científicas, políticas, artísticas e culturais.
Influence of accelerator type on the volume stability of shotcrete and the establishment of shrinkage model
Authors: Wan Zhenmin , He Tingshu
Published: June 2024

The characteristics of shotcrete can lead to significant shrinkage deformation, presenting potential threats to tunnel structure safety. To research this concern, in this study the effects of three accelerators on the volume stability of cement paste, cement mortar and concrete were investigated. The correlation equations of the shrinkage deformation of cement paste, cement mortar and concrete were established, and the drying shrinkage prediction model of cement mortar with accelerator was constructed by combining the ACI 209 model and the GL2000 model. Findings from this study show that the liquid alkali accelerator AR had the greatest autogenous shrinkage and drying shrinkage, with the highest mass loss under drying conditions. The study demonstrated that there exists a good linear relationship between the shrinkage deformation of cement paste, cement mortar and concrete with accelerator. Finally, the proposed prediction model for drying shrinkage of cement mortar exhibits strong predictive capabilities.
Ana Dili Eğitimi Araştırmalarında Veri Güdümlü Yönelim: Konuşma Çözümlemesi Yöntemi
Authors: Turhan Osman , Yorgancı Osman Kürşat
Published: June 2024

Konuşma çözümlemesi (KÇ), etkileşimde-konuşmanın düzenini ve bu düzende ortaya çıkan sosyal eylemleri inceleyen bir yöntem ve yaklaşımlar bütünüdür. Ampirik kanıtı merkeze alan KÇ, etkileşimin mikro ayrıntılarının çözümlemeye dâhil edildiği, araştırmacıların öznel varsayımlarının çözümlemelere yansıtılmadığı bir araştırma yöntemi olması sebebiyle sözlü iletişimin incelendiği diğer araştırma yöntemlerinden farklılık göstermektedir. KÇ, temele alınan metodolojik ilkeler ve kullanılan analitik teknikler bakımından, doğası gereği sözlü etkileşimin yoğun bir şekilde gözlemlendiği ana dili eğitimi alanı çalışmaları için oldukça uygun bir araştırma yöntemidir. Bu bağlamda, KÇ araştırma yönteminin ana dili eğitimi alanındaki uygulamalarını incelemek büyük önem taşımaktadır. Bu çalışmada, ana dili eğitimi alanında KÇ araştırma yöntemi ile yürütülen araştırmaların kuramsal temelini betimlemek amaçlanmıştır. Temel nitel araştırma ile desenlenmiş bu çalışmada, ana dili eğitimi alanında KÇ araştırma yöntemi kullanılarak yürütülmüş araştırmalar alan yazını taraması yoluyla saptanmış ve inceleme nesnesi olarak belirlenmiştir. Veriler doküman incelemesi aracı ile toplanmış ve içerik analizi ile çözümlenmiştir. Çalışmanın sonucunda KÇ araştırma yönteminin Türkçenin ana dili olarak öğretimi alanında oldukça sınırlı sayıda çalışmada kullanıldığı tespit edilmiş, uygulamalarının yalnızca konuşma öğrenme alanı ve dil eğitimiyle ile sınırlanmadığı ve beceriler ve disiplinler arası bir bağlamı olduğunun altı çizilmiş, Türkçe dışındaki diğer bazı dillerin ve Türkçenin ana dili olarak öğretimi alanında KÇ araştırma yöntemiyle yürütülen araştırmalarda öğrenci ve öğretmen etkileşimi ve öğretmenin yönergesi temelinde akran etkileşiminin ele alındığı belirlenmiştir. Edinilen bilgiler ışığında KÇ araştırma yönteminin Türkçe eğitimine özgün ve pragmatik bir perspektif getireceği anlaşıldığından Türkçe eğitimi alanında KÇ araştırma yöntemini temel alan çalışmaların yürütülmesi önerilmiştir.
Meta-analysis of short-term and long-term outcomes of robot-assisted and open radical surgery for hilar cholangiocarcinoma
Authors: Efanov M. G. , Tarakanov P. V. , Koroleva А. А. , Vankovich A. N. , Kovalenko D. E. , Fisenko D. V. , Tsvirkun V. V.
Published: June 2024

Aim. To review the comparative studies into robot-assisted and open surgeries for hilar cholangiocarcinoma.

   Materials and methods. Search for the comparative studies into the results of robot-assisted and open surgeries in patients with hilar cholangiocarcinoma was performed using electronic databases Embase, MEDLINE, Web of Science and Google Scholar by keywords “robotic” AND “hilar cholangiocarcinoma” OR “perihilar cholangiocarcinoma” OR “Klatskin tumor” published by December 31, 2023.

   Results. The meta-analysis involves the results of 169 resections, including 53 robot-assisted and 116 open surgeries. Robot-assisted interventions revealed longer surgery duration (weighted mean difference (WMD) = 157.49, CI = 95 % [102.85; 212.12], р < 0.00001), less amount of intraoperative blood loss, close to statistically significant (WMD = −76.41, CI = 95 % [−159.90; 7.08], р = 0.07). Robot-assisted and open surgery groups appear comparable in terms of their perioperative parameters, including blood transfusion rate, number of R0 resections, number of lymph nodes removed, rate of postoperative complications, length of hospital stay, in-hospital mortality, as well as overall and event-free survival rates.

   Conclusion. Meta-analysis of short-term and long-term outcomes of robot-assisted and open surgeries for hilar cholangiocarcinoma of the liver and bile ducts proves the potential and possibility for using robotic technologies in selective patients.
Abstracts of foreign publications
Authors: Akhaladze D. G.
Published: June 2024

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Cholecystocholedocholithiasis as a cause of acute necrotizing pancreatitis in children
Authors: Pykhteev D. A. , Elin L. M. , Filyushkin Yu. N. , Elina M. O. , Verbovsky A. N.
Published: June 2024

Aim. To improve treatment outcomes for acute biliary pancreatitis in children with cholecysto- and choledocholithiasis.

   Materials and methods. The authors conducted a retrospective analysis of the examination and treatment of 14 children aged 3–17 years with moderate and severe ABP. In 11 observations (78.5 %) the period from the onset of the disease to hospitalization comprised < 24 hours, in 3 observations (21.4 %) > 48 hours. All patients underwent a comprehensive examination including clinical, laboratory and instrumental diagnostics.

   Results. Ultrasound signs of acute cholecystitis were detected in 10 children (83.3 %), biliary hypertension – in 12 (85.7 %). Laparoscopic cholecystectomy was performed in 1 patient (7.14 %) within 72 hours from the onset of the disease; 1 child underwent open cholecystectomy with lithoextraction and drainage of the common bile duct according to Kerr technique. Open cholecystostomy with drainage of purulent-necrotic parapancreatitis was performed in 1 case. Endoscopic papillosphincterotomy, lithoextraction and cholangiography were performed in 4 children (28.6 %), 1 child additionally underwent stenting of the common bile duct and pancreatic duct. All patients were diagnosed with necrotizing pancreatitis and various types of parapancreatitis. Drainage of parapancreatitis in the Vladimirsky Moscow Regional Research Clinical Institute was performed in 5 (35.7 %) children: 2 (14.3 %) by open technique, in 2 (14.3 %) by laparoscopic sanation and in 1 by US-guided percutaneous drainage.

   Conclusion. Emergency endoscopic papillosphincterotomy with lithoextraction refers to a method of choice for the elimination of biliary hypertension in choledocholithiasis. Delayed or elective cholecystectomy is considered preferable for children with severe or moderately-severe acute biliary pancreatitis. The choice of drainage technique for infected parapancreatitis depends on the spread and sanation quality of purulent process.
Laparoscopic interventions in children with cystic bile duct dilations
Authors: Sokolov Yu. Yu. , Efremenkov A. M. , Utkina T. V. , Solodinina E. N. , Melekhina O. V. , Akhmatov R. A. , Lukovkina O. V. , Barskaya K. A.
Published: June 2024

Aim. To evaluate the efficacy of laparoscopic interventions and to carry out a comparative analysis of various options for biliodigestive anastomoses in children with cystic dilation of bile ducts.

   Materials and methods. The results of laparoscopic interventions were retrospectively analyzed in 110 children aged 2 months – 17 years with cystic bile duct dilation. Conversion was required in 3 observations (2.7 %). Laparoscopically assisted or total laparoscopic extirpation of dilated bile ducts with hepaticojejunostomosis was performed in 83 patients (75.5 %), laparoscopic surgery with hepaticoduodenostomosis – in 24 patients (21.8 %).

   Results. The duration of surgery was significantly shorter when hepaticoduodenoanastomosis was formed. After laparoscopic interventions, early complications were revealed in 10 observations (9.3 %), including 7 cases (6.5 %) of hepatico-duoduodenoanastomosis failure in which relaparotomy was performed with reconstruction of both interintestinal and biliodigestive anastomosis. Late postoperative complications (anastomotic stenosis and adhesive intestinal obstruction) developed in 11 patients (10.2 %). In 5 observations (4.6 %), percutaneous transhepatic cholangiostomy with staged balloon dilation of hepaticojejunostomosis (n = 3) and endoscopic balloon dilation of hepaticoduodenostomosis with stenting (n = 2) were performed with a positive effect.

   Conclusion. Resection of bile ducts with cystic dilations with the formation of biliodigestive anastomosis can be performed both via video-assisted surgery and completely laparoscopically. Laparoscopic interventions in children with different variants of cystic dilation of the bile ducts prove to be effective and safe.
Endoscopic pancreatic interventions in children
Authors: Solodinina E. N. , Zykin A. P. , Fomicheva N. V. , Pakhomova A. Yu. , Sivolob D. V. , Korovin S. A.
Published: June 2024

Aim. To increase the efficiency of surgical treatment for children with pancreatic malformations and diseases using endoscopic interventions.

   Materials and methods. The study enrolled 39 children aged 3–17 years who underwent 58 endoscopic interventions.

   Results. Transpapillary interventions were performed in 14 children with pancreatic duct abnormalities. Stenosis of the proximal pancreatic ducts was revealed in 5 observations – stenting was performed. Lithiasis of Wirsung's duct was confirmed in 4 observations, an abnormality in the form of an incomplete pancreas divisum was revealed in 3 of them. Pancreas divisum was detected in 1 patient, sphincterotomy of the minor duodenal papilla was performed. Transmural interventions were carried out in 24 observations: puncture – in 10 patients with intra- or parapancreatic cystic formations, drainage – in 14 patients with pseudocysts. Combined transpapillary and transmural surgery was performed in a child with traumatic pancreatic disruption.

   Conclusion. Transpapillary interventions prove to effectively eliminate hypertension in the pancreatic ducts in children. Transmural procedures can be used to drain pancreatic pseudocysts in children.
Pancreas with high pancreatic fistula risk, pancreatoduodenectomy or pancreatectomy? Cohort retrospective study
Authors: Khatkov I. E. , Tsvirkun V. V. , Izrailov R. E. , Tyutyunnik P. S. , Solovyev N. O.
Published: June 2024

Aim. To compare treatment outcomes and quality of life in patients undergoing pancreatoduodenectomy and pancreatectomy with risk of postoperative pancreatic fistula > 50 % according to the UA-FRS scale.

   Materials and methods. The study involved the results of treatment of 14 patients with neoplasms of the hepatopancreaticoduodenal zone, who were intraoperatively chosen to undergo pancreatectomy instead of pancreatoduodenectomy. In all patients, the risk of forming a pancreatic fistula after surgery was ≥ 50 % (UA-FRS). The experimental group consisted of 14 patients comparable in diagnosis, age, and comorbidities, who underwent pancreatoduodenectomy with the same risk of pancreatic fistula.

   Results. Complications ≥ IIIa according to Clavien–Dindo were observed in 6 patients (42.8 %) in the pancreatectomy group and in 8 patients (51.7 %) in the resection group. 5 patients (35.7 %) in the resection group revealed postoperative pancreatic fistula of class B and C, according to ISGPS. Length of hospital stay after surgery and 30-day mortality did not differ between groups. Quality of life after surgery had no pronounced differences between the groups according to most scales. Symptoms related to digestive disorders in those who underwent pancreatoduodenectomy were more pronounced. Patients in the pancreatectomy group were more susceptible to symptoms associated with diabetes mellitus, and experienced greater financial difficulties.

   Conclusion. Pancreatectomy fails to provide a significant reduction in the incidence of postoperative complications and mortality. In exceptional situations, increasing the extent of surgery to pancreatectomy may be the right solution, with comparable results, without compromising quality of life. Prior to surgery, pancreatectomy should not be considered as the main planned extent of surgery. The final decision on the extent of intervention should be made intraoperatively by a multidisciplinary team. Preserving part of the pancreas is essential, if possible.
Osmanlı Dönemi Yapı Temellerinde Sismik Yalıtım
Authors: Günay Hilal , Torunbalcı Necdet
Published: June 2024

Yapıların deprem gerçeğine yönelik olarak ele alınması geçmişten günümüze söz konusu olmuştur. Yapısal tasarım noktasında dikkate alınan önemli bir girdi olan sismik yükler, yakın tarihe kadar yapısal dayanıklılık ile ilişkilendirilmekte iken modern sismik anlayışla birlikte çeşitli eleman ve düzenlemelerle sismik girdinin azaltılması ya da aktif etkileşimle sönüm ile ilişkilendirilmekte ve yapısal tepkinin azaltılması amaçlanmaktadır. Günümüzde modern sismik anlayış ile şekillenen taban yalıtım sistemlerinin araştırmaları sürdürülmekte ve kullanım alanları giderek artmaktadır. Osmanlı Dönemi yapıları incelendiğinde de bazı temel düzenlemelerinin taban yalıtımı anlayışına benzerliği gözlenmiştir. Özellikle Konjic Köprüsü, Süleymaniye Camii, Nuru Osmaniye Camii, Büyük Mecidiye Camii ve Küçüksu Kasrı yapılarının temel düzenlemeleri bu duruma kaynak oluşturmaktadır. Çalışma, bu alandaki benzerlikten yola çıkılarak ülkemizdeki bazı yapıların karşılaştırmalı olarak temel düzenlemelerinin incelenmesini, geçmişteki uygulamaların, modern sismik taban yalıtım sistemleri ile benzerliğini irdeleyerek, günümüz taban yalıtım sistemlerinin ilk örnekleri olup olmadığı konusunun açıklığa kavuşturulmasını, geçmişe ve geleceğe ışık tutulmasını hedeflemektedir.