bluuebunny/crossref_metadata_2025 huggingface dataset:
Distortion effect on the ligation of imidazoles to water-insoluble iron(III) porphyrin
Authors: Konno Hirofumi , Nonomura Yoichi , Kishimoto Yasushi
Published: July 2023

Axial ligands control the various chemical reactions triggered by heme proteins. Thus, studies on the reaction of iron porphyrin with ligands are important for understanding their functions. Here, a spectroscopic investigation was performed to clarify the distortion effect of the porphyrin ring on the ligation of imidazoles (imidazole (Im), 1-methyl- and 2-methylimidazole (1-MeIm and 2-MeIm)) to iron(III) porphyrin. The overall stability constant ([Formula: see text] was found to have increased, while [Formula: see text] decreased with increasing distortion of the porphyrin core. However, the [Formula: see text] of the tetraphenyl-substituted complex, which is considered the least distorted, was not minimal, while the [Formula: see text] was not maximal. These results suggest that the stability of bis-ligand iron(III) porphyrin complexes depends on the increase in the saddle-type distortion of the porphyrin, the type of distortion, and the steric hindrance at the surrounding substituents. Furthermore, the ligation of 1-MeIm to iron(III) porphyrin hydroxo complexes with the porphyrin ring distortion was investigated. The ligation of 1-MeIm to the iron(III) dodecaphenylporphyrin hydroxo complex (DPPFeOH) suggests that a reaction mechanism different from the general reaction mechanism may occur simultaneously, i.e., a simultaneous reaction. In addition, the [Formula: see text] of DPPFeOH was found to be approximately 15 times smaller than that of the chloride complex. The relationship between the distortion and stability of bis-ligands iron(III) porphyrin complexes obtained in this study is expected to assist in the elucidation of the model reaction of heme proteins.
Transcranial focused ultrasound stimulation of cortical and thalamic somatosensory areas in human
Authors: Kim Hyun-Chul , Lee Wonhye , Weisholtz Daniel S. , Yoo Seung-Schik
Published: July 2023

The effects of transcranial focused ultrasound (FUS) stimulation of the primary somatosensory cortex and its thalamic projection (i.e., ventral posterolateral nucleus) on the generation of electroencephalographic (EEG) responses were evaluated in healthy human volunteers. Stimulation of the unilateral somatosensory circuits corresponding to the non-dominant hand generated EEG evoked potentials across all participants; however, not all perceived stimulation-mediated tactile sensations of the hand. These FUS-evoked EEG potentials (FEP) were observed from both brain hemispheres and shared similarities with somatosensory evoked potentials (SSEP) from median nerve stimulation. Use of a 0.5 ms pulse duration (PD) sonication given at 70% duty cycle, compared to the use of 1 and 2 ms PD, elicited more distinctive FEP peak features from the hemisphere ipsilateral to sonication. Although several participants reported hearing tones associated with FUS stimulation, the observed FEP were not likely to be confounded by the auditory sensation based on a separate measurement of auditory evoked potentials (AEP) to tonal stimulation (mimicking the same repetition frequency as the FUS stimulation). Off-line changes in resting-state functional connectivity (FC) associated with thalamic stimulation revealed that the FUS stimulation enhanced connectivity in a network of sensorimotor and sensory integration areas, which lasted for at least more than an hour. Clinical neurological evaluations, EEG, and neuroanatomical MRI did not reveal any adverse or unintended effects of sonication, attesting its safety. These results suggest that FUS stimulation may induce long-term neuroplasticity in humans, indicating its neurotherapeutic potential for various neurological and neuropsychiatric conditions.
Combining Optimum Propeller Design on Roro Ship Re-engine
Authors: Arina I Made , Iswantoro Adhi , Fitri Salsabilla Aulia
Published: July 2023

Passenger ships serve several areas in Indonesia, one of which is KMP (Kapal Motor Penumpang) Dharma Rucitra 3. In 2020 this ship had an accident and almost sank, then causing the main engine to submerge. With this problem, it is necessary to repower with the engine provided by the company, by replacing the old engine with a new engine. The new engine namely Yanmar 6N21A SV with a power of 1200 HP at 850 RPM. Initially the ship's speed was 12 knots with the data of Makita GNLH 630M engine with a power of 1300 HP at 375 RPM with a B4-50 propeller. To achieve the desired speed, it is necessary to have an optimal propeller to improve engine performance. In this research, an algorithm has been specially developed to find the optimum propeller design of B-series propellers for KMP Dharma Rucitra 3 by defining the overall parameters of a propeller like diameter, pitch-ratio, blade area ratio and the number of blades. The optimum propeller design is performed as multi-objective function to constraints imposed by propeller parameters. The computer program has been developed to select the optimum propeller by considering the boundary condition of system, hull-propeller interactions, and engine-propeller matching (EPM). This research also carried out open water and self-propulsion simulations using computational fluid dynamics (CFD). Then it can be concluded that the development of an algorithm to optimize the selection of propellers on KMP Dharma Rucitra 3 obtained propellers with B4-49.6 type with a diameter of 1,995 m so that it can reach a speed of 14,2 knots at 85% maximum continuous rating of engine power.
On semigroups of transformations that preserve a double direction equivalence
Authors: Chen Hui , Liu Xin , Wang Shoufeng
Published: July 2023

For a non-empty setXX, denote the full transformation semigroup onXXbyT(X)T\left(X)and suppose thatEEis an equivalence relation onXX. Evidently,TE∗(X)={α∈T(X)∣(x,y)∈Eif and only if(xα,yα)∈Efor allx,y∈X}{T}_{{E}^{\ast }}\left(X)=\left\{\alpha \in T\left(X)| \left(x,y)\in E\hspace{0.33em}\hspace{0.1em}\text{if and only if}\hspace{0.1em}\hspace{0.33em}\left(x\alpha ,y\alpha )\in E\hspace{0.33em}\hspace{0.1em}\text{for all}\hspace{0.1em}\hspace{0.33em}x,y\in X\right\}is a subsemigroup ofT(X)T\left(X). In this article, we investigate Green relations, Green∗\ast-relations and Green∼\sim-relations, various kinds of regularities,ℱ{\mathcal{ {\mathcal F} }}-abundant andG{\mathcal{G}}-abundant elements and left and right magnifying elements inTE∗(X){T}_{{E}^{\ast }}\left(X). More specifically, we first obtain the necessary and sufficient conditions under whichℒ{\mathcal{ {\mathcal L} }}(respectively,ℒ∗{{\mathcal{ {\mathcal L} }}}^{\ast },ℒ˜\widetilde{{\mathcal{ {\mathcal L} }}},ℛ{\mathcal{ {\mathcal R} }},ℛ∗{{\mathcal{ {\mathcal R} }}}^{\ast }, andℛ˜\widetilde{{\mathcal{ {\mathcal R} }}}) is (left, right) compatible,ℛ=ℛ∗{\mathcal{ {\mathcal R} }}={{\mathcal{ {\mathcal R} }}}^{\ast }orℒ=ℒ˜{\mathcal{ {\mathcal L} }}=\widetilde{{\mathcal{ {\mathcal L} }}}. Then, we give the sufficient and necessary conditions such thatTE∗(X){T}_{{E}^{\ast }}\left(X)is left regular (respectively, right regular, completely regular, intra-regular, and completely simple). Finally, we characterize theℱ{\mathcal{ {\mathcal F} }}-abundant (respectively,G{\mathcal{G}}-abundant) and left (respectively, right) magnifying elements inTE∗(X){T}_{{E}^{\ast }}\left(X).
Role of chemical mediators and biological factors in tooth movement
Authors: Aljarullah Atheer Hussain , Aloraini Sultanah Abdullah , Almaghamsi Shahad Talal , Abanmy Malak Ahmed , Alzenaidi Ola Yousef , Alharbi Hanan Ahmad , Alshammari Yasmeen Hmoud
Published: July 2023

In recent years, there have been various theories proposed to describe the mechanism causing tooth movement. These theories can be broadly categorized into two perspectives: one focusing on bone as the direct target of mechanical force, and the other highlighting the periodontal ligament (PDL) as the key target. While the direct view suggests that osteoclasts and osteoblasts are directly stimulated by compression and tension stresses, respectively, the indirect view suggests that the PDL responds to orthodontic forces. However, evidence challenges the direct view, as bone does not respond to static forces and implants/ankylosed teeth do not move. The indirect view proposes that orthodontic forces lead to areas of compression and tension within the PDL, causing various cellular responses and inflammatory reactions. Osteoclasts play a crucial role in bone resorption, influencing the rate of tooth movement. Inflammatory mediators, including chemokines, cytokines, prostaglandins, and neuropeptides, are released during orthodontic tooth movement, facilitating osteoclast recruitment and activation. Osteoclast genesis is influenced by factors such as TNF-α, IL-1, IL-6, and prostaglandins. Chemical mediators, including parathyroid hormone, vitamin D3, corticosteroids, and thyroxin, have been explored for their potential to accelerate tooth movement, but their systemic effects and practical application present challenges. Overall, understanding the biology of tooth movement involves considering the interactions among osteocytes, osteoclasts, and osteoblasts, as well as immune cells and inflammatory cytokines. Expediting tooth movement requires further research and the development of effective and safe strategies.
Coal Bed Methane: Opportunities and Challenges in India
Authors: Rejo Nidhija , Purohit Santanu , Jain Arvind Kumar
Published: July 2023

Energy deficit countries like India are heavily reliant on importing fuel. If the fuel is harnessed locally, it can help the country reduce its import dependency and build a secure energy future. To cater to the energy demand, various renewable energy options are being looked into. One such fuel option is coal bed methane (CBM), which comprises methane trapped in coal bed reservoirs that can be extracted and used as a fuel source to meet energy demands. Methane is a combustible hydrocarbon with varied uses ranging from commercial industries to a commonly used household fuel. India has the fifth largest coal reserves in the world and can harness the entrapped methane from the coal beds seams. As per India's regulatory body, the Directorate General of Hydrocarbons, India has prognosticated 92 TCF (2600 BCM) in 12 states of CBM resources. CBM is a clean and unconventional fuel resource that may help tackle the fuel shortage for India's expanding GDP. And to meet the energy constraint of the growing Indian economy, the potential of CBM needs to be explored. This paper focuses on the overview of CBM in India and analyses the techno-economic challenges, including investment opportunities, policy limitations, and technological bottlenecks.
Ludność polska w wieloetnicznych regionach Litwy, Łotwy i Białorusi
Authors: Kowalski Mariusz
Published: July 2023

Pomimo podobnych uwarunkowań historycznych mniejszość polska, zamieszkująca tereny dawnego Wielkiego Księstwa Litewskiego i Inflant Polskich, w zależności od miejsca zamieszkania (Litwa, Łotwa, Białoruś) znajduje się w odmiennej sytuacji społeczno-gospodarczej i polityczno-ustrojowej. Odciska się to na relacjach mniejszości polskiej z innymi grupami etnicznymi oraz władzami państwowymi. Analiza sytuacji sugeruje, iż pod wieloma względami najlepsze warunki dla pielęgnowania swojej odrębności (pomimo niewielkiej liczebności) ma mniejszość polska na Łotwie. Na przeciwległym krańcu, choć najliczniejsza, znajduje się mniejszość polska na Białorusi.
Trends and Persistence in the Greenland Ice Sheet Mass
Authors: Caporale Guglielmo Maria , Gil-Alana Luis Alberiko , Sauci Laura
Published: July 2023

This paper examines trends and persistence in the Greenland ice sheet mass by applying fractional integration methods to a dataset constructed by Mankoff et al. (2020) on ice discharge for seven different regions of Greenland. The adopted empirical framework encompasses a wide range of stochastic processes and is informative about their dynamic and long-run properties. The main finding is that significant changes have occurred in the behaviour of the series of interest in recent years; more specifically, although a deterministic trend is not present, ice discharge in the various regions of Greenland has become a non-stationary, explosive process, with shocks having permanent effects. It appears that, as a result of global warming, the ice mass loss in Greenland has already reached a tipping point and become an irreversible process.
JEL Classification: C22; Q54
Bladder compliance dynamics of pelvic organ prolapse patients subjected to robotic-assisted sacrocolpopexy
Authors: Lau Hui-Hsuan , Su Tsung-Hsien , Lee Jie-Jen , Chou Dylan , Hsieh Ming-Chun , Lai Cheng-Yuan , Peng Hsien-Yu , Lin Tzer-Bin
Published: July 2023

Purpose Though a static compliance over the entire filling phase of the bladder can be easily assayed from the cystometry, a protocol measuring the dynamic compliance at a specific filling stage has not been established in human subjects/patients. As objective benefits of robotic-assisted sacrocolpopexy (RSCP) to the bladder function, particularly urine storage, of pelvic organ prolapse (POP) patients wait to be established, this study investigated the impact of RSCP on the bladder storage by focusing on its impact on compliance using the pressure-volume analysis (PVA), a protocol used to measure compliance dynamics in animals.
Materials and Methods: Pre- and post-operative PVAs derived from urodynamic studies of a total of 27 female POP patients, who underwent RSCP for prolapse stage ≥ II (POP Quantification system) were retrospectively reviewed. Bladder compliance, infused volume, and threshold pressure were analyzed.
Results: Compared with the pre-operative control, RSCP increased the mean compliance of the filling phase (p<0.01, N=27). Notably, RSCP increased the compliance of the late half (p<0.01, N=27) but displayed a negligible effect on that of the early half (p>0.05, N=27) of the filling phase. Mechanistically, RSCP decreased the change of detrusor pressure (p<0.01, N=27) without significantly affecting that of infused volume (p>0.05, N=27). Furthermore, RSCP decreased the ΔPdet in the late half (p<0.05, N=27) but not that in the early half (p>0.05, N=27) of the filling phase.
Conclusions: RSCP improved bladder storage as it increased bladder compliance, particularly the late filling phase; possibly by restoring anatomical location and geometric conformation for bladder expansion.
The improved outcome of reversal surgery for split stoma with peristomal incision compared to end stoma closure with middle incision in patients with Crohn’s disease
Authors: Wang Shixian , Du Kangling , Duan Ming , Xu Yihan , Guo Zhen , Gong Jianfeng , Zhu Weiming , Li Yi
Published: July 2023

Background
Temporary stoma formation is common in Crohn’s disease (CD), while stoma reversal is associated with postoperative morbidity. This study aimed at evaluating postoperative outcomes of split stoma reversal (SSR) with peristomal incision versus end stoma closure (ESC) with middle incision.
Methods
Consecutive patients with CD who underwent stoma reversal surgery between 2017 and 2021 were included. Patients’ demography, clinical characteristics, and postoperative outcomes were collected. Date analysis was performed to evaluate the short and long-term outcomes of reversal surgery.
Results
There were 255 patients who underwent stoma reversal surgeries meeting the inclusion criteria. Split stoma reversal was superior to end stoma closure in operative time, intraoperative blood-loss, incision length and classification, the length of postoperative hospital stay, hospital expense, and postoperative complications (P < 0.05). Additionally, patients in split stoma reversal showed significant decreased postoperative inflammatory parameters including white blood cell, procalcitonin, and percentage of neutrophils (P < 0.05). Interestingly, decreased postoperative surgical recurrence was found in patients with split stoma reversal compared to those with end stoma closure (8.3% vs 3.2%).
Conclusions
In case of stoma construction is indicated in patients with Crohn’s disease undergoing surgical resection, the split stoma is recommended, given that split stoma reversal with peristomal incision is associated with cosmetic outcome, short length of postoperative hospital stay as well as decreased postoperative morbidity.
Patient-specific estimation of trapeziometacarpal joint passive stiffness reveals a potential effect of hypermobility on osteoarthritis development
Authors: Valerio Thomas , Milan Jean-Louis , de Monsabert Benjamin Goislard , Vigouroux Laurent
Published: July 2023

Even if osteoarthritis is multifactorial, hypermobility of the trapeziometacarpal joint is commonly considered as one of the potential risk factors since it could affect the joint mechanical loadings. Nevertheless, the results are still controversial by the lack of quantitative validation. The objective of this study was to evaluate the effect of joint laxity on trapeziometacarpal cartilage mechanical loadings.
A patient-specific finite element model of the trapeziometacarpal joint passive stiffness was developed using segmentation from medical images. The joint passive stiffness was modeled by linear springs placed all around the joint. The linear spring stiffness was determined by using an optimization process to fit force-displacement data measured during laxity tests performed on eight healthy volunteers. The estimated passive stiffness parameters were then included in a full thumb finite element simulation of a pinch grip task driven by muscle forces to evaluate the effect on trapeziometacarpal loading. Correlation between the passive stiffness and the trapezium cartilage mechanical loadings in terms of joint contact pressures and maximum shear strain was analyzed.
A significant negative correlation was found between the trapeziometacarpal joint passive stiffness and the trapezium cartilage contact pressure during the pinch grip task simulated.
These results thus suggest that hypermobility of trapeziometacarpal joint could impact the trapezium cartilage contact pressure. Given that the risk of osteoarthritis development is associated with the intensity of cartilage loadings, our study argues in favor of the idea of an amplified risk with hypermobility.
A fine tune hyper parameter Gradient Boosting model for CPU utilization prediction in cloud environment
Authors: savita savita Khurana , gaurav Gaurav Sharma , Bhawna Bhawna Sharma
Published: July 2023

CPU utilization prediction is key factor for efficient resource management and capacity planning in cloud computing environments. By accurately predicting utilization patterns, resource managers can dynamically distribute workloads to ensure optimal utilization of resources. The load can be equally distributed among virtual machines, leading to a reduction in VM migration and overhead time. This optimization significantly improves the overall performance of the cloud. This proactive approach enables efficient resource usage, minimizing the risk of bottlenecks and maximizing overall system performance. In this paper a Gradient Boosting model with hyper parameter tuning based upon grid search (GBHT) is proposed to enhance CPU utilization prediction. Multiple weak learners are combined in the proposed model to produce a powerful prediction model. and hyperparameters tuning is used to enhance its performance as well as predictive accuracy. Different machine learning and deep learning models are examined side by side. The results clearly demonstrate that the proposed GBHT model significantly contribute superior performance then the traditional machine learning models (SVM, KNN, Random Forest, Gradient Boost), deep learning models (LSTM, RNN, CNN), time series model (Facebook Prophet) and as well as the hybrid models, combining LSTM with Gradient Boost and Gradient Boost with SVM. The proposed model demonstrates superior performance compared to the other models, achieving the lowest MAPE of 0.01% and high accuracy with an R2 score of 1.00.
Balancing Cleaner Energy and Geopolitical Interests in the complex transition of the European Electricity Mix - From Fukushima to the Ukraine War
Authors: Cataldi Marcio , Espinosa Nieves , Jerez Sonia , Montávez Juan , Silveira Larissa da , Dupont Jairton , Teixeira Marcos
Published: July 2023

In the modern world, electric energy plays a pivotal role in sustaining life and driving technological, scientific, and human development. Consequently, the selection and availability of the energy sources used for electricity generation have become crucial elements of strategic planning for countries and economic blocks. Moreover, the impact of these choices extends beyond the mere energy demand/supply, affecting economies, societies and the environment across geographical boundaries. This study delves into the various factors influencing the composition and the recent expansion of the European electricity mix. It explores the interplay of environmental, climatic, political, economic, and external factors that shape Europe´s energy choices. To conduct this analysis, we utilized data from the International Energy Agency on electricity generation and GHG emissions. Data mining techniques were employed to uncover patterns and trends in the monthly data from 2010 to 2022, from which political and economic milestones such as the shutdown of nuclear power plants and the European Union's increased reliance on natural gas imports from Russia were examined. The study also discusses the impact of using natural gas for power generation on increasing GHG emissions. Ultimately, this research reveals that the European Union choices in transitioning towards a cleaner electricity mix have not yet proven efficient. In fact, these choices may have inadvertently created favorable conditions for Russia's invasion of Ukraine, triggering, not only a humanitarian crisis, but also an economic downturn in Europe due to soaring energy prices. This crisis could potentially extend beyond Europe and impact the whole planet in 2023, including developing countries that rely on stable energy prices for their sustainable growth.
An Efficient Method for Micropropagation of Red-List Herbaceous Plant Species (Hedysarum cretaceum)
Authors: Chokheli Vasiliy , Bakulin Semyon , Ermolaeva Olga , Rajput Vishnu , Azarov A.S. , Kumari Arpna , Stepanenko Viсtoriya , Bushkova Anastasia , Dmitriev Pavel , Martinez-Montero Marcos Edel , Varduni Tatiana
Published: July 2023

Hedysarum cretaceum Fisch is a critically endangered herbaceous species with high ornamental and phytomeliorative properties; thus, it needs urgent conservation and protection methods to conserve. In the present study, an efficient method for microtonal propagation of H. cretaceum is developed. The seed sterilization was optimized as treatment with 96% alcohol (2 min) and burned (1 sec) through a burner flame. Murashige and Skoog (MS) medium with the addition of 0.5 mg/L 6-Benzylaminopurine (BAP) (shoots per explant – 18.0) and 1.0 mg/L BAP and 0.1 mg/L Indole-3-acetic acid (IAA) (shoots per explant – 18.4) for the shoot and ⅓ MS supplemented with 0.1 mg/L IAA (rooting indicator – 62%) for roots were identified best composition for the proliferation and regeneration. Additionally, the medium for maintaining callus culture was determined – DKW with the addition of 2.5 mg/L BAP and 0.1 mg/L IAA, the possibility of direct organogenesis in vitro in the studied plant was also standardized. In addition, seed germination after various pre-sowing treatments was studied. It is shown that scarification makes achieving 80% germination of seeds possible. Also, sulfuric acid was used as a pre-sowing seed treatment, germination was 45%. Thus, using the protocols we developed, it is possible to maintain the H. cretaceum culture in vitro and increase seed germination using pre-sowing treatment.
Grade 10 Namibian learners' problem-solving skills in algebraic word problems
Authors: Iilonga Hesekiel K. , Ogbonnaya Ugorji I.
Published: July 2023

This study investigated Grade 10 Namibian learners' problem-solving skills in algebraic word problems. A sample of 351 Grade 10 learners from ten secondary schools in the Ohangwena Region in Namibia participated in this study. The study followed a qualitative approach and adopted Polya's Problem-Solving Model as the framework. The data were collected using the Algebra Word Problem-solving Test and Interview. The findings showed that the learners needed better problem-solving skills in algebraic word problems. Only 6% and 7% of the learners showed an ability to understand the problems and devise a plan, respectively, while only 5% could carry out the plans. Based on the findings, it is recommended that teachers introduce learners to Polya's steps of problem-solving and incorporate word problems into mathematics teaching.
Legal regulation of circumstances that exclude administrative responsibility under the legislation of Ukraine
Authors: Zheliznyak S.M.
Published: July 2023

Administrative responsibility, as an integral component of legal responsibility, is distinguished by the multifaceted nature of administrative offenses. At the same time, the proper provision of human rights may provide for exemption from administrative liability in cases clearly provided for by law. The problem of exemption from administrative responsibility in Ukraine concerns not only justice, but also the effectiveness of the legal system. During law enforcement, it is important to maintain a balance between administrative coercion and the presence of conditions that allow to prove or disprove the guilt of a person in committing an illegal act. The importance of updating the national legislation to ensure justice and protection of human and citizen’s rights during proceedings on administrative offenses was emphasized. It is emphasized that the circumstances that exclude administrative responsibility include: necessary defense, extreme necessity and lack of judgment. It was concluded that there is no identity between the circumstances that exclude proceedings in the case of an administrative offense and the circumstances that exclude administrative responsibility. Analyzed national legislation on the subject of legal regulation of circumstances excluding administrative responsibility. Attention is drawn to international acts of «soft law» regarding the application of administrative coercion measures. The defining role of the Code of Ukraine on Administrative Offenses among other legislative acts is emphasized. The direction of improvement of the institute of administrative responsibility in Ukraine is proposed. It was concluded that specifying the procedure for the application of circumstances that exclude administrative responsibility will make it possible to strengthen the protection of the rights and freedoms of a person and a citizen during proceedings in cases of administrative offenses.
Guided Waves in Ship Structural Health Monitoring – A Feasibility Study
Authors: Roch Emil , Zima Beata , Woloszyk Krzysztof , Garbatov Yordan
Published: July 2023

Ships and offshore structures operate in a severe corrosion degradation environment and face difficulty in providing long-lasting corrosion protection. The Classification Societies recommend regular thickness measurements leading to structural component replacements, to ensure structural integrity during service life. The measurements are usually performed using ultrasonic thickness gauges and such an approach requires multiple measurements of the corroded structural components. Otherwise, the collected data are insufficient to precisely assess the corrosion degradation level. This study aims to perform numerical and experimental analyses to verify the use of guided ultrasonic waves in defining the corrosion degradation level of the corroded structural components of a ship. The study incorporates the fundamental antisymmetric Lamb mode, excited by piezoelectric transducers attached at the pre-selected points on stiffened panels, representing typical structural ship components. The specimens are exposed to accelerated marine corrosion degradation, the influence of the degree of degradation on the wave time of flight being analysed. The study indicates that guided waves are a promising approach for diagnosing corroded structural components. The signals characterised by a high signal-to-noise ratio have been captured, even for relatively long distances between the transducers. This proves that the proposed approach can be suitable for monitoring more extensive areas of ship structures by employing a single measurement.
Four – Electron Oxidative Addition of an N=N Double Bond at a Chromium Metallocyclopropene
Authors: Rathke Paul , Rittle Jonathan
Published: July 2023

This report describes the synthesis of a pseudo-tetrahedral chromium alkyne complex supported by a bidentate phosphinimide ligand and its reactivity with azobenzene. Characterization of the former by structural and computational methods reveals an unprecedented extent of alkyne activation by a formal chromium(II) center, suggesting that this complex is best described as a chromium(IV)-metallocyclopropene. Exposure of this compound to an azobenzene derivative results in the formation of a chromium(VI) diimido complex, which constitutes a rare 4-electron oxidative addition of an N=N double bond. The isolation of a chromium(IV)-hydrazido intermediate enabled mechanistic investigations of this challenging bond cleavage process. This work substantiates the notion that terminal phosphinimide ligands can engender first-row transition metal ions with exceptional reactivity.
Marca personal y su posicionamiento en tiempos de Covid19 en docentes universitarios
Authors: Córdova Chirinos José William , Puicón Llontop Víctor Enrique , Vásquez Diaz Noha Anabel , Saucedo Burga Gabriela Sucetty
Published: July 2023

La presente investigación se realizó en el contexto laboral que ocasionó la Covid19 en el planeta y donde gran número de docentes experimentaron diversas formas de trabajar y a reubicarse en un empleo nuevo, adecuándose a los requerimientos de un mundo laboral con pronósticos poco predecibles. El objetivo fue evaluar la relación entre la marca personal y su posicionamiento en tiempos de Covid 19 en docentes universitarios. La población y muestra estuvo integrada por docentes universitarios de una Universidad licenciada por la Superintendencia Nacional de Educación Superior (SUNEDU), es de alcance nacional e internacional. Es un estudio correlacional, de enfoque cuantitativo. Para la obtención de la información se empleó una encuesta virtual, con un cuestionario en escala de Likert. Los resultados confirman la relación de la Marca Personal y su posicionamiento en tiempos de Covid19 en docentes universitarios.; la misma que según el valor del coeficiente de Spearman (r= 0, 474) es directa y media. Se concluyó que, la posición de los docentes universitarios, se encuentra en el nivel regular, lo que significa que se tiene una buena perspectiva de su calidad profesional, y a pesar del Covid19, se sienten destacados en su línea profesional.
PENGEMBANGAN MULTIMEDIA INTERAKTIF BERBASIS ADOBE FLASH CS 6 PADA PELAJARAN MATEMATIKA MATERI KPK DAN FPB
Authors: Adib Muhamad
Published: July 2023

The purpose of this study is to develop innovative, practical and effective learning media in Mathematics with the material of the Biggest Fellowship Factor (FPB) and the Smallest Multiples Alliance (KPK). This research is motivated by the large number of MI who do not have adequate learning media. The development method in this learning media uses a rare method of research and development (Research and Development) developed by Sadiman consisting of 9 steps namely; 1) Analyzing needs, 2) Formulating objectives, 3) Formulating items, 4) Arranging gauges of success, 5) Writing media manuscripts, 6) Expert validation, 7) Trials, 8) Revisions, 9) Final manuscript products. The results of this study indicate that the Interactive Multimedia learning media based on Adobe Flash CS 6 falls into the feasible and effective category. This learning media is declared feasible based on the feasibility test according to media experts with a total percentage of 90.63% and valid material experts with a percentage of 91.46%. This learning media is effective based on effectiveness test with small group test results with a percentage of 90%, and large group trials with a percentage of 90.23%. Whereas in its application it was able to increase the grade average grade to 82.06. So that interactive multimedia learning media based on Adobe Flash CS 6 is included in the category of innovative, practical, effective and feasible to use.
Diagnosis and treatment of external hemorrhoids on an outpatient basis
Authors: Lomonosov A. L. , Golubev A. A. , Kukanova M. A. , Khomenchuk A. A. , Khushakov A. H. , Lomonosov G. D.
Published: July 2023

There are many variants of acute external hemorrhoids (AEH), with varying degrees of its development.The purposeof the study is to study the features of diagnosis and treatment of outpatient patients with AEH in the form of ovoid (AEH–FO).Material and methods. A solid sample, a retrospective sequential study of the data of 97 outpatient patients with AEH–FO. AEH–FO of the first degree (AEH–FO 1) was detected in 57,7% of patients, the node was more often elastic, blue in color, AEH–FO of the second degree (AEH–FO 2) in 42,3% of patients, wound necrosis on the node, the discharge of blood from it. In 32,7% of patients treated on average after 4 days, the average pain on the visual pain scale (VPS) was 6 points. Conservative treatment was carried out in all patients with AEH–FO with the appointment  of MOFF (90% diosmin and 10% hesparin flavides. When bleeding from the node, tranexam, psyllium, lactulose, macrogol were prescribed for constipation. Analgesia was performed depending on the intensity of the pain. Only 3,1% of patients were operated on before 2018.Conclusions. The treatment of patients with AEH–FO was eﬀective. In the average treatment period of 14 days, all patients recovered and were able to work.
A comprehensive review of resources and tools for statistical power analysis
Authors: Hennes Erin , Hung Ya-Hsin , Choi Jeongyun , Willis Mairead Anna Anna , Pedersen Alexander Whittemore , Proctor Robert W. , Lane Sean Patrick
Published: July 2023

This paper presents a comprehensive review of and searchable database of statistical power analysis tools.
A Rare Triple Neural Tube Defect- Case Report
Authors: Kumar Amit , Kumar Kislay
Published: July 2023

Multiple neural tube defects are a rare entity and it also includes anomalies like encephalocele, dermal sinus, myelomeningocele, and spina bifida. These occur due to defective closure of neural tube at multiple sites. There have been isolated cases of coexistence of triple neural tube defect in same subject and only 9 cases have been reported in available world literature.
Here, we present a rare case of 7 days old boy with three different NTDs- occipital encephalocele, upper cervical meningocele and lumbar myelomeningocele. Type II Chiari malformation, tethered cord, fenestration of posterior falx, hydrocephalus and syringohydromyelia accompanying the NTDs.
Pelatihan Dasar Programming Pembuatan Game Menggunakan Scratch Sebagai Upaya Kesiapan Menghadapi Industri Kreatif
Authors: Fauzan Natsir  , Sihombing Redo Abeputra , Triyadi
Published: July 2023

Sumber daya manusia yang dibutuhkan pada Era Industri 4.0 minimal harus memiliki 5 kompetensi utama di antaranya critical thinking dan problem solving. Pemerintah Indonesia melalui Kemendikbud berencana memasukkan dua kompetensi tambahan dalam kurikulum pendidikan di Indonesia, yaitu Computational Thinking (CT) dan Compassion. Computational thinking dianggap sebagai salah satu kompetensi dasar untuk melengkapi keterampilan tersebut. Kompetensi tambahan Computational Thinking dan Compassion sangat diperlukan untuk menghadapi era teknologi digital. Namun di sisi lain, pengetahuan tentang computational thinking masih sangat minim. Beberapa sekolah dasar masih belum memanfaatkan teknologi untuk mendorong kemampuan computational thinking siswa. Salah satu cara melatih skill tersebut adalah dengan mengajarkan pemrograman kepada anak usia dini. Di antara metode yang dapat dilakukan untuk mengenalkan computational thinking kepada para siswa sekolah dasar adalah melalui kegiatan workshop dan pelatihan. Oleh karena itu, tujuan kegiatan ini adalah mengedukasi cara menggunakan aplikasi Scratch untuk mengenalkan pemikiran matematis dan komputasional di sekolah dasar dan mengenalkan konsep pemrograman sederhana dengan membuat proyek animasi dan games. Hasil yang didapatkan siswa setelah mengikuti pelatihan ini yaitu meningkatnya pemahaman dan pengalaman bagaimana cara menggunakan komputer serta siswa bisa membuat animasi dan games sederhana dengan aplikasi Scratch.
The Effect of In-situ Stress on Hydraulic Fractures Dimensions
Authors: Al Humairi Mohammed , Abdul Hadi Hassan
Published: July 2023

Understanding of in-situ stress profiles and orientations plays a vital role in designing a successful hydraulic fracturing treatment. This paper is an attempet to examine the effect of lithology and in situ stress on geometery of hydraulic fractures. A hydraulic fracturing design simulator software called FracproPT with various capabilities for designing most of hydraulic fracture was used for  simulate and optimize the hydraulic fracturing. For studying purpose,  three different cases of stress gradient contrast between different formations  are considered in this study (0.4, 0.5 and 0.75 psi/ft). The results obtained from the simulator showed that  lithologies surrounding the pay zone have an effect on the fracture’s height, width, and length. Also,  Maximum height is achieved when the stress contrast between the pay zone and the surrounding layers is very small.
Experimental Work to Study the Behavior of Proppant Inside the Hydraulic Fractures and the Plugging Time
Authors: Abdul Ameer Mohammed , Hamed Allah Samera
Published: July 2023

Experiments were conducted to study the behavior of the solid particles (proppant) inside the hydraulic fracture during the formation stimulation, and study the effect of the proppant concentration on the hydraulic fracturing process, which lead to bridge and screen-out conditions inside the fractures across the fracture width that restricts fracturing fluid to flow into the hydraulic fracture. The research also studies the effect of the ratio between the fracture size and the average particles diameter “proppant", on fracture bridging. In this study two ratios were considered β= 2 and 3 ,where β=Dt / Dp where: Dt= hydraulic fracture size (width) and Dp=Average particles diameter.

This work presents experimental work to study the behavior of these particles (proppant) inside the hydraulic fractures by measuring the plugging time for different particles concentration for different conditions. The experimental data recorded for different particle concentration and one flowing forces (gravity) inside the hydraulic fracture. Most recorded experimental data obtained were analyzed by using SPSS software.
Philosophical Foundations of Collective Responsibility on the Example of the Activities of the European Court of Human Rights
Authors: Zayets Serghiy
Published: July 2023

The scale of the consequences caused by Russia’s aggression against Ukraine inevitably leads to reflections on the collective responsibility of Russian citizens. The philosophical justification of collective responsibility is still problematic. The main issues under debate are the possibility of the existence of collective social agents and collective guilt as a basis for imposing responsibility. This article proposes to look at the activities of the European Court of Human Rights as a practice of collective responsibility in international law. The activities of the European Court of Human Rights can serve as a practical benchmark for assessing certain theoretical positions. Important historical experience is provided by the practice of holding the international military tribunal in Nuremberg (Germany, November 20, 1945 – October 1, 1946), which had the status of an international court over the military and political leadership of Nazi Germany – known as the Nuremberg Trials. With this practical example of collective responsibility in mind, the study proposes to conduct a selective reverse review of the philosophical views of Hannah Arendt and Karl Jaspers. The study demonstrates that although the reflections of these philosophers were not without certain flaws, Arendt and Jaspers, focusing mainly on different aspects, were able to offer a generally sound justification for collective responsibility. Their proposed justification can serve as a foundation for further developments in this area. The practical significance of this conclusion is that it may give impetus to the development of new legal mechanisms of collective responsibility of the Russians for the consequences of their unjustified aggression against Ukraine. Such collective responsibility has not only legal, but also moral and political dimensions, and is also a component of the so-called social «educational process» (Lernprozess).
Gerenciamento de resíduos sólidos agroindustriais: uma revisão sistemática nos processos de industrialização da carne bovina
Authors: Araújo Pablo Phorlan Pereira de , Leite Michael Douglas Sousa , Leite Francisca Simone Lopes da Silva , Silva Aline Cristina de Araújo Florentino , Costa Kylvia Luciana Pereira , Bandeira Pablo Sthefano Roque de Souza , Silva Filho Valdeir Gonçalves da , Gonçalves Samara Nóbrega de Oliveira
Published: July 2023

Esta pesquisa objetivou revisar a literatura com vistas ao gerenciamento de resíduos sólidos agroindustriais na produção de carne bovina em abatedouros, buscando identificar as práticas atuais, tecnologias e implicações ambientais dessa atividade em diferentes países. Metodologicamente, o estudo foi considerado qualitativo e utilizou-se das bases de dados Scopus, Google Scholar, Web of Science. Por meio do método PRISMA foi realizada a revisão sistemática e, ao fim dessa revisão, chegou-se a 18 artigos científicos nacionais e internacionais selecionados e analisados. Dentre os autores, Santagata e McCabe se destacaram pela quantidade de artigos publicados em comparação aos outros autores. Quanto aos periódicos de maior destaque, estão o Jornal da produção mais limpa (4 artigos) e Revisões de energia renovável e sustentável (2 artigos). Referente às bases de dados, a ScienceDirect apresentou a maior quantidade de publicações (13), seguida por Springer (2) e Taylor & Francis (2). Foi possível constatar uma predominância de pesquisas com a finalidade de estudar o potencial energético dos resíduos dos abatedouros, o que representa uma clara tendência de que os resíduos dos abatedouros constituem ou podem constituir-se numa fonte importante de energia renovável em seus países. Dentre os impactos gerados pela agroindústria de processamento da carne bovina, os autores citam principalmente: a contaminação das águas, dos solos, do ar e os prejuízos diretos à saúde humana.
Teaching Data Visualisation and Basic Map-Making Skills at a Liberal Arts College
Authors: Gastner Michael T.
Published: July 2023

Communicating data has become vital in an increasingly data-dependent society. Because data are often communicated graphically, many colleges and universities are offering courses that teach the principles of data visualisation. In this article, the author reflects on his experience of teaching such a course at a liberal arts college. The course introduced students to the tidyverse suite of packages for the programming language R, including the data visualisation package ggplot2, which implements Wilkinson’s (2005) ‘grammar of graphics’. The packages sf and tmap were used to extend the capabilities of the tidyverse packages for analysing geospatial data and producing thematic maps. This article provides insights into effective teaching strategies, including intended learning outcomes, the core syllabus, pedagogy and assessment. Sample tasks and visualisations are also presented to demonstrate how essential cartographic skills were imparted to students.
About some aspects of renewable energy (examples of use of renewable energy sources, lithium mining, electric transport)
Authors: Polak Yuri
Published: July 2023

The review was prepared based on the analysis of dozens of sources in Russian and English on issues related to the transition to renewable energy sources in order to reduce greenhouse gas emissions, and the problems that arise during their operation. Attention is paid to conferences of specialists that have recently taken place under the auspices of the UN and in Moscow. On the basis of conversations with their participants, the difficulties of transition to new technologies are described, and the opinions of specialists are given. The role of lithium as a key component of batteries is emphasized. As an illustration of the problems of the "green agenda", the situation with the automotive industry, which currently produces up to 40 % of environmental pollution, is described. The pros and cons of electric transport are discussed.
Ý định tiếp tục sử dụng thương mại di dộng: một nghiên cứu mở rộng mô hình xác nhận - kỳ vọng
Authors: Bùi Thành Khoa
Published: July 2023

Mục tiêu của nghiên cứu này là ứng dụng mô hình xác nhận – kỳ vọng kết hợp với hai loại giá trị bao gồm giá trị tiêu khiển và giá trị thực dụng để dự báo ý định tiếp tục sử dụng thương mại di động tại Việt Nam. Nghiên cứu đã tiến hành thu thập 805 phiếu khảo sát để phân tích mô hình cấu trúc bình phương nhỏ nhất từng phần (PLS-SEM). Kết quả nghiên cứu chỉ ra rằng giá trị tiêu khiển và giá trị thực dụng là các tiền đề tích cực cho cảm nhận hữu dụng, đồng thời sự xác nhận là nhân tố quan trọng tác động đến các cấu trúc còn lại bao gồm hai loại giá trị, thái độ đối với thương mại di động. Đồng thời, nghiên cứu cũng khẳng định mối quan hệ giữa cảm nhận hữu dụng, thái độ, và ý định tiếp tục sử dụng thương mại di động. Một số đóng góp về mặt lý thuyết cũng như hàm ý quản trị cũng được trình bày trong nghiên cứu này.
Jaws from the deep: biological and ecological insights on the kitefin shark Dalatias licha from the Mediterranean Sea
Authors: Bottaro Massimiliano , Sinopoli Mauro , Bertocci Iacopo , Follesa Maria Cristina , Cau Alessandro , Consalvo Ivan , Scarcelli Faustino , Sperone Emilio , Vacchi Marino , Marsili Letizia , Consales Guia , Danovaro Roberto
Published: July 2023

Due to their late maturation, extreme longevity, low fecundity and slow growth rates, deep-sea Chondrichthyes are extremely vulnerable to human impacts. Moreover, assessing the impact of deep-sea fisheries is difficult, as many species (including sharks) are part of the bycatch and are often discarded at sea, and/or landed under generic commercial-species codes. The lack of this information on fishery data sets and the limited availability of species-specific life history data make challenging the management of deep-sea Chondrichthyes. The kitefin shark Dalatias licha is a cosmopolitan elasmobranch, mainly found on continental and insular shelf-breaks and slopes in warm-temperate and tropical waters. This species is a common by-catch of the deep-sea trawling, considered as “Endangered” by the IUCN Red List for all European waters, Mediterranean Sea included. Here we present the results of a study based on a total of 78 specimens of kitefin shark collected over 3 years in the Ligurian Sea (NW Mediterranean) as by-catch from deep-water fisheries. Total length ranged from 380 to 1164 mm, and individual weight ranged from 198 to 8000 g. Immature and mature individuals showed a sex ratio dominated by males. Adult males were observed throughout the year, while mature females were observed only in spring-summer. These data lead to hypothesise a spatial segregation between genders. The kitefin shark diet was dominated by bony fish (mainly Macrouridae) and other small sharks (e.g., Galeus melastomus and Etmopterus spinax), but their gut included plastic items and parasites. Data reported here underline the rarity, complex ecology and the threat for this shark species and support the urgency of promoting initiatives for their monitoring and conservation.