bluuebunny/crossref_metadata_2025 huggingface dataset:
A virus-evolutionary, multi-objective intelligent tool path optimization methodology for sculptured surface CNC machining
Authors: Φουντάς Νικόλαος
Published: August 2023

Η σημερινή βιομηχανική παραγωγή αντιμετωπίζει πολλαπλές προκλήσεις που περιλαμβάνουν μεταξύ άλλων τη γρήγορη προσαρμογή τους στις σύγχρονες τάσεις-τεχνολογίες, την ευελιξία στις τρέχουσες καταναλωτικές απαιτήσεις και τη μείωση του κόστους μέσω της αυτοματοποίησης επαναλαμβανόμενων διεργασιών. Ταυτόχρονα, οι απαιτήσεις για την κατασκευή λειτουργικών και αξιόπιστων προϊόντων υψηλής αισθητικής μετατρέπουν αυτές τις προκλήσεις σε πρακτικά βιομηχανικά προβλήματα που πρέπει να επιλυθούν με την εφαρμογή μη-συμβατικών μεθόδων κατεργασιών που θα παρέχουν τουλάχιστο ημι-βέλτιστα αποτελέσματα. Παρόλο που οι γλυπτές επιφάνειες μπορούν να ανταποκριθούν σε τέτοιες απαιτήσεις όσον αφορά το σχεδιασμό του προϊόντος, υπάρχει ένα κρίσιμο πρόβλημα όσον αφορά τις κατεργασίες τους λόγω των πολύπλοκων γεωμετρικών τους χαρακτηριστικών σε αντίθεση με τις πρισματικές επιφάνειες. Οι προσεγγίσεις που ακολουθούνται και εφαρμόζονται για τη δημιουργία διαδρομών εργαλείων σε συστήματα παραγωγής με τη βοήθεια υπολογιστή (CAM) εξακολουθούν να βασίζονται στην ανθρώπινη παρέμβαση καθώς και σε πειράματα δοκιμής-σφάλματος. Είναι λοιπόν αμφίβολο εάν αυτές οι προσεγγίσεις μπορούν να συμβάλλουν στο σχεδιασμό βέλτιστων διαδρομών των κοπτικών εργαλείων παρέχοντας μια γενική προσέγγιση για αξιόπιστες, ανταγωνιστικές και ευέλικτες κατεργασίες γλυπτών επιφανειών. Κύριος στόχος αυτής της διδακτορικής διατριβής είναι η ανάπτυξη μιας ευφυούς, αυτοματοποιημένης και γενικευμένης μεθοδολογίας για τη δημιουργία βέλτιστων διαδρομών κοπτικών εργαλείων για κατεργασίες σύνθετων γλυπτών επιφανειών σε εργαλειομηχανές CNC 5 αξόνων. Η μεθοδολογία λαμβάνει τις παραμέτρους “cutting tool”, “stepover”, “lead angle”, “tilt angle” and “maximum discretisation step” ως ανεξάρτητες μεταβλητές για το βέλτιστο σχεδιασμό τροχιάς-διαδρομής κοπτικών εργαλείων, ενώ ως στόχοι βελτιστοποίησης λαμβάνονται οι παράμετροι "mean machining error", "mean distribution" και "minimum number of tool positions" διατυπώνοντας με τον τρόπο αυτό, ένα γενικευμένο πολυκριτηριακό πρόβλημα βελτιστοποίησης των κατεργασιών CNC γλυπτών επιφανειών. Η μεθοδολογία περιλαμβάνει έναν γενετικό-εξελικτικό αλγόριθμο βασισμένο στη θεωρία της βιολογικής εξέλιξης των ιών για την εκτέλεση της βελτιστοποίησης, και μια ρουτίνα ελέγχου του αλγόριθμου που αυτοματοποιεί τις ενέργειες του λογισμικού CAM. Αυτά τα δύο συστήματα της μεθοδολογίας αλληλεπιδρούν και ανταλλάσσουν πληροφορίες για την επίτευξη της δημιουργίας βέλτιστων διαδρομών εργαλείων για οποιαδήποτε γλυπτή επιφάνεια. Η μεθοδολογία εφαρμόστηκε τόσο σε πειράματα προσομοίωσης όσο και σε πειράματα πραγματικών μηχανουργικών εξαρτημάτων και τα αποτελέσματα συγκρίθηκαν με άλλα αντίστοιχα που προέκυψαν από την εφαρμογή συναφών μεθόδων και που είναι διαθέσιμα στην ευρύτερη βιβλιογραφία.
Translators who own it: A case study on how doxa and psychological ownership impact translators’ engagement and job satisfaction
Authors: Monzó-Nebot Esther
Published: August 2023

This paper explores the job satisfaction of translators working for an international intergovernmental organization. The extant literature on translators’ job satisfaction has explored a number of constructs. Based on developments in the field of organizational theory and the complexity of translation as a job, it is argued that psychological ownership may prove an adequate framework to explain translators’ job satisfaction and instrumental in establishing a dialogue between the various analyses of different workplaces in the field of translation and interpreting studies. The study focuses on a specific multilingual intergovernmental organization and draws on the interviews of 17 Spanish-native translators of different nationalities. Their feelings of ownership are analyzed and variations in how they relate to constructs of psychological ownership —feelings of control, intimacy of knowledge, and self-investment— become apparent. Exploring patterns shows those variations to be related to translators’ differing translation doxas, that is, their divergent, competing, and sometimes conflicting understanding of what translation is and should be. Furthermore, relationships between psychological ownership, translation doxa, and translators’ efforts to advance their own doxas in the organization are examined with a view towards creating means to engage professional translators in advancing a doxa shaped by and for translators across workplaces.
Language proficiency and the right to an interpreter when accessing a fair trial
Authors: McEvoy Gearóidín
Published: August 2023

This paper explores the right to an interpreter as part of the right to a fair trial under the United Nations and Council of Europe systems of human rights. The right to an interpreter is guaranteed as part of both Article 14 of the International Covenant on Civil and Political Rights and Article 6 of the European Convention on Human Rights. Under both instruments, accused persons are entitled to a number of minimum rights to ensure a fair trial. Both instruments hold that an accused person has the right to “have the free assistance of an interpreter if he cannot understand or speak the language used in court”. This paper explores what this right means in reality for accused persons who seek to avail themselves of an interpreter. Only those who cannot understand or speak the language of the court are entitled to an interpreter. However, it is not always clear what is meant when we say a person ‘speaks’ or ‘understands’ a language. One may well understand day-to-day interactions in a second language but be completely out of their depth in a formal courtroom setting. Through comparison with the same right under the Statute of Rome, as well analysis of jurisprudence from the Human Rights Committee and the European Court of Human Rights this paper explores the scope of language rights under the right to a fair trial and the implications for access to justice.
Neuroscience and Translation
Authors: Zhang Cuiling
Published: August 2023

In the past decades, researchers have established various theories and approaches to explore the nature of translation, this “most complex type of event yet produced in the evolution of the cosmos” (Richard, 1953:250). Especially since the inception of Translation Studies as an academic discipline in the 1970s, translation scholars have drawn extensively on tools, concepts, and theories from other disciplines, such as sociology, anthropology, psychology, and biology in their efforts to explore the many facets of translation and interpreting. Now, neuroscience came to the fore. As the study of the nervous system, the task of neuroscience is to understand brain processes— how we perceive, act, learn, and remember – and explain behavior in terms of brain activities (Kandel et al., 2012, pp. 3-5). For decades, neuroscientists have explored human language and have produced remarkable studies on language development and learning. Yet the findings on how the brain handles language processing are still primarily based on monolinguals. The mental process of multilingual people and many other aspects of the transfer between different languages remain largely unsettled. This inspired Maria Tymoczko to explore the neurological mechanisms involved in translating, a field that she dubs as one of the “known unknowns” in translation studies (Tymoczko, 2012) and believes will fundamentally influence the way translation is thought about and ultimately illuminate many aspects of translation, including the “black box” of the individual translator.
The Impact of Management on Clinical Performance: Evidence from Physician Practice Management Companies
Authors: La Forgia Ambar
Published: August 2023

Mergers and acquisitions in healthcare are increasingly leading to changes in firm management. This paper studies how a change in firm management impacts clinical performance using data on an understudied phenomenon: medical practice acquisitions by physician practice management companies (PPMCs). PPMCs market themselves as offloading the administrative burden of running a medical practice without compromising physician autonomy over clinical decisions. However, a PPMC’s management strategy and practices, such as performance monitoring and financial incentives, could influence physician behavior. For example, some PPMCs advertise increasing revenue through better financial management, whereas others also advertise improving quality through better clinical management. In this paper, I collect data on three large PPMCs that manage the practices of more than 40% of obstetricians and gynecologists (Ob-Gyns) in Florida between 2006 and 2014. An Ob-Gyn’s main clinical decision in childbirth involves a tradeoff between financial and clinical outcomes: cesarean sections (C-sections) are often more highly reimbursed than vaginal births but pose risks to maternal and infant health when not medically necessary. Using difference-in-differences methods, I find heterogeneous effects on C-sections depending on a PPMC’s publicized management strategy. Physicians acquired by PPMCs that focus on financial management increase the use of C-sections, resulting in less clinically appropriate care and worse patient outcomes. The opposite result is found when PPMCs focus on clinical management. I provide qualitative and quantitative evidence that differences in firm management are the most likely driver of changes in C-sections. This paper informs how the corporatization of medicine can alter clinical performance outcomes.

This paper was accepted by Stefan Scholtes, healthcare management.

Funding: This project was supported by grants from the Agency for Healthcare Research (AHRQ), the National Science Foundation (NSF), and Wharton’s Mack Institute for Innovation [Mack Institute Research Fellowship]. The analysis was conducted using data from the State of Florida’s Agency for Healthcare Administration (AHCA). The content is solely the responsibility of the author and does not necessarily represent the official views of AHRQ, NSF, Mack Institute, or AHCA.

Supplemental Material: The data files and online appendix are available at https://doi.org/10.1287/mnsc.2022.4571 .
Standardization of apple cancellation test for neglect patients in Korea: An observational study
Authors: Jang Woo-Hyuk , Jang Jong-Sik
Published: August 2023

BACKGROUND

Neglect can be divided into two types using apple cancellation test (apple test): Egocentric neglect (EN) and allocentric neglect (AN). However, in South Korea, apple test results and decision criteria are still largely dependent on tests by foreign countries.

AIM

To establish a new South Korea standard and improve the accuracy of neglect assessment, the apple experiment was standardized in this study.

METHODS

This study was conducted on 223 healthy subjects for a total of 7 mo from August 2021 to February 2022. Standardization was carried out using the original apple test developed by Bickerton in 2011. In scoring for the apple test, total omission error refers to the number of missed targets (full apple) in the entire test sheet (left, middle, and right area). The score for EN is the difference between the cor-rect number of right area and the correct number of left area (excluding the middle area). For AN, the score is difference between the number of left opening apples and number of right opening apples (including the middle area). Linear regression analysis was used for standardization using the general characteristics of subjects and the results of the apple test.

RESULTS

The cut-off score, which is the standard value indicating the pathological condition by combining the results of all subjects, is as follows: Total omission error (5), error for EN (2), and error for AN (2). Also, differences in cut-off score according to age were found.

CONCLUSION

This study will be helpful in facilitating a more accurate differential diagnosis of neglect.
Acute hepatitis of unknown etiology in an adult female: A case report
Authors: Dass Lucinda , Pacia Alexandra Marie Malabanan , Hamidi Mahgol
Published: August 2023

BACKGROUND

Acute liver injury (ALI) refers to inflammation of the hepatic parenchyma without hepatic encephalopathy that lasts less than 6 mo. When the etiology is unknown, Acute Hepatitis of Unknown Origin (AHUO) can present as a diagnostic and treatment challenge. AHUO in the adult population is unusual and poorly documented. It has an incidence between 11% and 75%. Currently, no treatment guidelines exist. With no identified cause, treatment is often blind, and the wrong treatment plan may have unintended consequences.

CASE SUMMARY

We present the case of a 58-year-old woman who presented to the emergency room for elevated liver function tests (LFTs). Her symptoms started 10 d prior to admission and included nausea, vomiting, jaundice, decreased appetite, weight loss of 10 lbs, and dark urine. She denied drinking alcohol or taking any hepatotoxic agents, including acetaminophen, statins, vitamins, or supplements. She was admitted to the hospital, and an etiologic work-up was carried out. Her initial bloodwork revealed elevated liver enzymes (alanine aminotransferase 2500 U/L, aspartate aminotransferase 3159 U/L, and alkaline phosphatase 714 U/L) and elevated total bilirubin of 6.4 mg/dL. She tested negative for common infectious etiologies such as hepatotropic viruses A, B, C, and E. Further infective work-up revealed negative serology for cytomegalovirus, Epstein-Barr virus, herpes simplex virus 1 & 2, and human immunodeficiency virus. Her autoantibody test results were negative, including anti-smooth muscle antibody, anti-mitochondrial antibody, and anti-liver kidney microsome 1 antibody. Magnetic resonance cholangiopancreatography ruled out biliary causes of elevated LFTs, and her core liver biopsy proved inconclusive. Over the course of her hospital stay, the patient's LFTs improved with supportive care and without steroids.

CONCLUSION

Idiopathic hepatitis makes treatment challenging. It can leave patients feeling confused and unfulfilled. Thus, educating the patient thoroughly for shared decision-making and management becomes essential.
Hepatoid adenocarcinoma of the stomach with neuroendocrine differentiation: A case report and review of literature
Authors: Fei He , Li Ze-Feng , Chen Ying-Tai , Zhao Dong-Bing
Published: August 2023

BACKGROUND

Both hepatoid adenocarcinoma of the stomach (HAS) and neuroendocrine differentiation (NED) are rare histological subtypes of gastric cancer with unique clinicopathological features and unfavorable outcomes. HAS with NED is even rarer.

CASE SUMMARY

Here, we report a 61-year-old man with HAS with NED, as detected by gastric wall thickening by positron emission tomography/computed tomography for a pulmonary nodule. Distal gastrectomy was performed, and pathological examination led to the diagnosis of HAS with NED. However, liver metastases occurred 6 mo later despite adjuvant chemotherapy, and the patient died 27 mo postoperatively.

CONCLUSION

We treated a patient with HAS with NED who underwent adjuvant chemotherapy after radical surgery and still developed liver metastases. We first report the detailed processes of the treatment and development of HAS with NED, providing an important reference for the clinical diagnosis and treatment of this condition.
Caution in the use of sedation and endomyocardial biopsy for the management of pediatric acute heart failure caused by endocardial fibroelastosis
Authors: Xin Xiao-Xuan , Se Yo-Yeng
Published: August 2023

Endocardial fibroelastosis (EFE) is commonly considered to be an inflammatory reactive lesion of hyperplasia and deposition of tissue fibers and collagen in the endocardium and/or subendocardium, which is strongly associated with endocardial sclerosis, ventricular remodeling and acute and chronic heart failure, and is one of the important causes for pediatric heart transplantation. Early diagnosis and treatment are the key factors in determining the prognosis of the children. In this paper, we would like to highlight the potential unintended consequences of the use of sedation and biopsy for pediatric acute heart failure caused by EFE and the comprehensive considerations prior to clinical diagnosis.
Split cornea transplantation in anterior lamellar keratoplasty for limbal dermoid surgery: a case report
Authors: Kurniawardhani Dewinta Retno , Widyawati Syska , Rhendy Rio , Kodrat Evelina
Published: August 2023

Limbal dermoid is a rare congenital lesion that can impair vision and raise aesthetic concerns. Surgery is frequently required to reduce discomfort and enhance visual outcomes. A 20-year-old woman presented with a limbal dermoid measuring 4.5 mm in diameter and half the depth of the stroma. Excision was performed with anterior lamellar keratoplasty (ALK) using a post-Descemet's membrane endothelial keratoplasty graft, which resulted in signs of graft failure. Re-surgery was then performed with post-Descemet's stripping endothelial keratoplasty graft. It yielded a clear graft with good visual acuity. The first corneal graft utilized 95% of the graft thickness to cover 55% of the defect, leading to poor host-donor apposition. The second graft employed 55–65% to cover the same portion of the defect. The proportional thickness of the graft is crucial for a successful ALK. Split cornea transplantation produces respectable results; however, the corneal thickness must be carefully considered.
Factors Mediating the Link Between Socioeconomic Status and Academic Outcomes of Children With Intellectual Disability
Authors: Wang Xichen , Wang Qianqian , Ma Minjie , Gu Zhengwei , Shi Yang , Wang Tingzhao
Published: August 2023

The study explores the influence of socioeconomic status (SES) on the academic outcomes of children with intellectual disability (ID), and the role of parental participation and parental attitudes toward educational communicators in this process. A total of 305 children with ID from special needs schools and their parents and teachers in China completed the survey. A structural equation model was built to explore the relation between the factors. Results indicated SES not only positively predicts the academic outcomes, but also predicts academic outcomes through the chain mediation of parental participation and parental attitudes towards educational communicators. Findings show the robustness of the Family Investment Model in Chinese contexts. Moreover, the role of parental participation and parental attitudes towards educational communicators cannot be ignored.
The Differing Shame Cultures of Tony Williams's Nutcase and Grettir's Saga
Authors: Hume Kathryn
Published: August 2023

Abstract: Tony Williams's Nutcase translates Grettir's Saga into a modern setting. Saga shame- and social media shame cultures differ, particularly in what gives life to life. I draw on Beowulf, Grettir's Saga , current criticisms of both, cultural theory, and other novels that build upon these earlier texts.
Solar thermionic energy converters with micro-gap spacers: publisher’s note
Authors: Zhang Xin , Rahman Ehsanur
Published: August 2023

This publisher’s note contains corrections to Opt. Lett. 48, 4173 (2023)10.1364/OL.498374.
An adhesion signaling axis involving Dystroglycan, β1-Integrin, and Cas adaptor proteins regulates the establishment of the cortical glial scaffold
Authors: Wong Wenny , Estep Jason A. , Treptow Alyssa M. , Rajabli Niloofar , Jahncke Jennifer N. , Ubina Teresa , Wright Kevin M. , Riccomagno Martin M.
Published: August 2023

The mature mammalian cortex is composed of 6 architecturally and functionally distinct layers. Two key steps in the assembly of this layered structure are the initial establishment of the glial scaffold and the subsequent migration of postmitotic neurons to their final position. These processes involve the precise and timely regulation of adhesion and detachment of neural cells from their substrates. Although much is known about the roles of adhesive substrates during neuronal migration and the formation of the glial scaffold, less is understood about how these signals are interpreted and integrated within these neural cells. Here, we provide in vivo evidence that Cas proteins, a family of cytoplasmic adaptors, serve a functional and redundant role during cortical lamination. Cas triple conditional knock-out (Cas TcKO) mice display severe cortical phenotypes that feature cobblestone malformations. Molecular epistasis and genetic experiments suggest that Cas proteins act downstream of transmembrane Dystroglycan and β1-Integrin in a radial glial cell-autonomous manner. Overall, these data establish a new and essential role for Cas adaptor proteins during the formation of cortical circuits and reveal a signaling axis controlling cortical scaffold formation.
Pharmacotherapy problems and associated factors among type 2 adult diabetic patients on follow up at Mizan-Tepi University Teaching Hospital, Southwest Ethiopia
Authors: Welday Kahssay Semere , Demeke Nebeyi Fisseha
Published: August 2023

Background

Over the past few decades, drug therapy problems (DTPs) have become a significant public health concern worldwide. DTPs in patients with diabetes are responsible for uncontrolled glycemia, disease worsening, early development of complications, high healthcare expenses, prolonged and recurrent hospitalizations, and mortality.

Objectives

This study aimed to identify the prevalence of drug therapy problems and determine the associated factors among patients with type II Diabetes Mellitus at a University Teaching Hospital in Southwest Ethiopia.

Methodology

Hospital-based cross-sectional study was conducted between September and October 2022. Data were collected through medical record reviews and interviewer-administered structured questionnaires, which were then analyzed using SPSS version 26. Cipolle’s method was adapted for classification of DTPs. Bivariate followed by multivariate logistic regression analysis was used to assess the association between predictor variables and the outcome variable. P-value ≤ 0.05 was employed as a cut-off point to determine statistical significance.

Result

Among 117 participants, 172 drug therapy problems (DTPs) were identified, with an average of 1.47 DTPs per patient, and83 (70.9%) participants had at least one type of drug therapy problem. Of the seven DTPs identified, need additional drug therapy was the most common, 50 (42.7%), followed by non-compliance with medication, 45 (38.5%) and ineffective drug therapy, 25 (21.4%). Occupational status and comorbidity were factors that associated with the occurrence of DTPs. Farmers were approximately four times more likely to develop DTPs than housewives were (adjusted odds ratio (AOR) = 3.56, 95% CI: 1.12–11.38, P = 0.03). The odds of drug therapy problems were twice as high in those with four comorbid conditions than in those without comorbidities (AOR = 1.95, 95% CI: 0.90–3.76, p = 0.02).

Conclusion

In the current study, the proportion of type 2 diabetes patients with drug therapy problems was high. This potentially lead to uncontrolled glycemia and early development of comorbid conditions, increasing morbidity and mortality rates. This could be attributed to the failure to effectively integrate clinical pharmacy services in different hospital wards, which is the case in virtually all hospitals in Ethiopia.
Photoacoustic and absorption spectroscopy imaging analysis of human blood
Authors: Tsai Wei-Yun , Breimann Stephan , Shen Tsu-Wang , Frishman Dmitrij
Published: August 2023

Photoacoustic and absorption spectroscopy imaging are safe and non-invasive molecular quantification techniques, which do not utilize ionizing radiation and allow for repeated probing of samples without them being contaminated or damaged. Here we assessed the potential of these techniques for measuring biochemical parameters. We investigated the statistical association between 31 time and frequency domain features derived from photoacoustic and absorption spectroscopy signals and 19 biochemical blood parameters. We found that photoacoustic and absorption spectroscopy imaging features are significantly correlated with 14 and 17 individual biochemical parameters, respectively. Moreover, some of the biochemical blood parameters can be accurately predicted based on photoacoustic and absorption spectroscopy imaging features by polynomial regression. In particular, the levels of uric acid and albumin can be accurately explained by a combination of photoacoustic and absorption spectroscopy imaging features (adjusted R-squared > 0.75), while creatinine levels can be accurately explained by the features of the photoacoustic system (adjusted R-squared > 0.80). We identified a number of imaging features that inform on the biochemical blood parameters and can be potentially useful in clinical diagnosis. We also demonstrated that linear and non-linear combinations of photoacoustic and absorption spectroscopy imaging features can accurately predict some of the biochemical blood parameters. These results demonstrate that photoacoustic and absorption spectroscopy imaging systems show promise for future applications in clinical practice.
Artificial intelligence in smart grids: A bibliometric analysis and scientific mapping study
Authors: Lampropoulos Georgios
Published: August 2023

The realization of sustainable development and sustainable development goals achievement are essential. Hence, the power sector digitalization is imminent. This bibliometric and mapping study aims to explore the use of artificial intelligence in smart grids and how the topic has evolved over the years. In total, ten research questions are set to be explored. The analysis includes 1,926 articles that were identified and retrieved from Scopus and Web of Science (WoS) over the period 2005 to 2022. The analysis includes the descriptive statistics of the related studies and the annual scientific production, the identification of the most relevant and impactful authors, articles, outlets, affiliations, and countries, and the examination of the most commonly used keywords. The most popular topics and the advancement of the research focus are also explored. The study examines the results, discusses the main findings, presents open issues, and suggests new research directions. The significant role of artificial intelligence in the realization of smart grids and the digitalization of the power sector to enable sustainable development and the achievement of sustainable development goals was evident.
An optimized stator and rotor design of squirrel cage induction motor for EMU train
Authors: Luthfiyah Hilda , Qowiy Okghi Adam , Malakani Arga Iman , Arthanto Dwi Handoko , Setiawan Fauzi Dwi , Ramanel Teddy Anugrah , Putra Gilang Mantara , Kamar Syamsul , Suryandi Asep Andi
Published: August 2023

This paper aims to objectively calculate the 480-kW squirrel cage induction motor (SCIM) design for the electric multiple unit (EMU) trains. This is done by optimizing the stator slot and rotor slot design to get efficiency and power factor targets. The stator slot design is achieved by limiting the width and height of the stator slot pitch according to the specified range. A depth-to-width ratio is used according to the range to optimize the design of the rotor bar slot. The design process of the induction motor consists of three steps: it determines the specification design target, calculates the specified parameters of the induction motor, and simulates the design to obtain the most optimal motor design using ANSYS Maxwell. The simulation performance values obtained an efficiency of 92.547 % and a power factor of 0.915. This value is obtained from the optimization of the rotor slot and has met the minimum requirements of efficiency and power factor in designing a SCIM. The design proposed in this paper can be developed and applied in the Indonesian domestic railway manufacturing industry.
Stability analysis of a hybrid DC-DC buck converter model using dissipation inequality and convex optimization
Authors: Tamba Tua A. , Chandra Jonathan , Hu Bin
Published: August 2023

The stability analysis of a DC-DC buck converter is a challenging problem due to the hybrid systems characteristic of its dynamics. Such a challenge arises from the buck converter operation which depends upon the ON/OFF logical transitions of its electronic switch component to correspondingly activate different continuous vector fields of the converter’s temporal dynamics. This paper presents a sum of squares (SOS) polynomial optimization approach for stability analysis of a hybrid model of buck converter which explicitly takes into account the converter’s electronic switching behavior. The proposed method first transforms the converter’s hybrid dynamics model into an equivalent polynomial differential algebraic equation (DAE) model. An SOS programming algorithm is then proposed to computationally prove the stability of the obtained DAE model using Lyapunov’s stability concept. Based on simulation results, it was found that the proposed method requires only 8.5 seconds for proving the stability of a buck converter model. In contrast, exhaustive simulations based on numerical integration scheme require 15.6 seconds to evaluate the stability of the same model. These results thus show the effectiveness of the proposed method as it can prove the converter stability in shorter computational times without requiring exhaustive simulations using numerical integration.
Quasi-dynamic hosting capacity in radial distribution feeder
Authors: Khomarudin Riki , Marojahan Banjar-Nahor Kevin , Hariyanto Nanang
Published: August 2023

The target of massive installation of renewable energy is the focus of this research. Several industrial sectors continue to install photovoltaic rooftop to support green energy. One of the main objectives of this research is to see the maximum impact of installing a photovoltaic rooftop at 1 point of customer and spread capacity for each customer. This research uses a radial distribution network system that closely resembles the distribution network in Indonesia, where the load profile considers the load characteristics of industrial, commercial, and residential loads. This study uses the line equation theorem method to calculate the voltage rises by considering two current measurement points: the current at the end and the current at the base. The obtained voltage rise is then accumulated to be summed up with the customer afterward. The results are obtained by considering three scenarios: 1) voltage limits, 2) voltage limits and line loading, and 3) voltage limits, thermal, and harmonics in accordance with regulations. The obtained results are closely aligned with the simulations performed on the hosting capacity software such as DIgSILENT.
Design and implementation of capacitor array as DC converters for electrical lighting in limited area
Authors: Jaya Arman , Irianto Irianto , Rahman Afif Aulia , Sung Kyungmin
Published: August 2023

The widely used DC-DC converters are inductor-based DC-DC converters and inductors along with combustion. The use of inductors can lead to large power losses, as well as heavy components in real terms. The proposed converter warning array aims to increase the voltage with a large increase ratio through a switching configuration process. This switching method is very simple and uses two pulses that are opposite each other so that the array converter can work optimally, whose function is to adjust the arrangement in a parallel arrangement to a series arrangement. The advantage of using a device is that it makes DC-based DC conversion lightweight and easy to implement. Tests have been carried out on 5 hanger arrays with a power of 80 W and 65 W, and the data from the test results show that the voltage increase ratio reaches 81.5 % or 4.08 times the input voltage, which indicates that the array converter warning is able to increase the input voltage according to the number of the arrays.
Impact of road load parameters on vehicle CO₂ emissions and fuel economy: A case study in Indonesia
Authors: Sukra Kurnia Fajar Adhi , Priyanto Heru , Indriatmono Dedy , Wijayanto Muhamad Agus , Ikhsanudin Irfan Yahya , Ermansyah Yoga Akbar
Published: August 2023

Carbon dioxide (CO2) contributes to the greenhouse effect and global warming. The Indonesian government has introduced a reduction in vehicle taxes based on the number of CO2 emissions, meaning that lower CO2 emissions result in lower tax rates. To measure the CO2 emissions, vehicle testing can be conducted on a chassis dynamometer using road load (R/L) parameters to assess the vehicle's loading during the test. The United Nations Economic Commission for Europe (UN ECE) Regulation no. 101 (R101) provides predefined table values for testing, but vehicle manufacturers can also provide their own R/L values, known as actual R/L. In this study, the vehicle underwent two tests: one using the R/L values from the standard table R101 and another using the actual R/L values provided by the manufacturer through coast-down results. By employing the actual R/L values, CO2 emissions can be reduced by up to 7.3 %. This reduction is achieved by lowering the vehicle's load by up to 17 % to enable optimal vehicle performance. Additionally, there is a potential improvement in fuel economy of up to 7.9 % for vehicles. These findings can serve as a reference for establishing future standard testing procedures.
Characterization of Thorium-bearing Minerals Using Micro-XRF in Metamorphic Rocks of Harau, West Sumatera
Authors: Adimedha Tyto Baskara , Syaeful Heri , Indrastomo Frederikus Dian , Ngadenin Ngadenin , Draniswari Windi Anarta
Published: August 2023

In 1974, BATAN conducted a survey to review the potential of radioactive minerals in Harau, West Sumatra. The survey shows that there are radiometric anomalies in several locations in the area. However, the survey has not been able to show the radioactive elements and minerals found in Harau. This study aims to identify and characterize radioactive elements and minerals in Harau. To prove that detailed geological mapping, radiometric mapping with Gamma Spectrometer RS-125, and analysis using Micro-XRF "M4 Tornado Plus®". The results of geological and radiometric mapping show that there are high thorium contents in the metamorphic rocks of the Kuantan Formation reaching 2300 ppm eTh. Identification of thorium-bearing minerals using a micro-XRF instrument resulted in thorium-bearing minerals found in the Harau area are thorite (ThSiO4), yttrialite (YThSi2O7), and monazite ((Ce,Nd,Th)PO4) with thorium levels within 2.75 - 42.75% ThO2 but experiencing a significant increase in Fe. In principle, micro-XRF analysis can identify minerals well, but this analysis can be supported by other analyzes so that it can provide much more precise results. This research is expected to provide information about the occurrences of thorium-bearing minerals in Harau, West Sumatera.
A Review of Synthetic and Earth's Resource-Based Slow-Release Fertilizers and Their Potential Role in Reducing Groundwater Pollution
Authors: Dida Eki Naidania , Solihin Solihin , Kurniadie Denny
Published: August 2023

Groundwater is an essential water source for humans. Unfortunately, some groundwater resources have been contaminated by wastes from various sectors. Fertilizer also contributes to groundwater contamination. The nutrients from fertilizer that are not absorbed by the plant move towards groundwater reservoirs and contaminate the groundwater. Slow-release fertilizer is a solution to reduce groundwater pollution while maintaining fertilizer’s function as the sources of nutrients for plants. This paper discusses and reviews the relevant literatures related to groundwater, fertilizer, slow-release fertilizer, and earth’s based slow-release fertilizer. The release rate of nutrient elements from different types of fertilizer is also presented. The synthetic base slow-release fertilizers and earth’s resource-based slow-release fertilizers can hold nutrients longer than conventional chemical fertilizers when exposed to water. Two particular minerals that can be used as raw materials in slow-release fertilizer synthesis are analyzed using XRD. They are from hydrothermal silica and obsidian. The XRD analysis of hydrothermal silica and obsidian shows the presence of amorphous silica and other minerals. Silica in compacted slow-release fertilizer can control the release rate of nutrient elements from fertilizer.
Why Doctors and Nurses Should have Unfettered Access to Hospital Medical Libraries
Authors:   HPC International, Hudson Hilton M.
Published: August 2023

The impact of medical librarians is well-documented. In one experiment, a group of primary care providers had the opportunity to send clinical questions to a rapid-response medical librarian. They received their replies in an average of 14 minutes, and 86 percent were described as having a positive impact on care. Two studies indicated patient length of stay was reduced when clinicians requested medical library searches related to a patient's case. Libraries can also help medical professionals avoid certain worst-case scenarios.
Tratamento de má oclusão de Classe II em duas fases, para evitar o bullying: relato de caso
Authors: Neves Bruno Moreira das , Conde Verônica Santos , Carvalho Flavio Cesar de , Lima Tatiana Araújo de , Quintão Cátia Cardoso Abdo
Published: August 2023

INTRODUÇÃO: Muitos ortodontistas preferem tratar a Classe II em uma fase. Porém, quando o paciente apresenta características que aumentam o risco de fraturas dos incisivos e afetam sua autopercepção, podendo levar ao bullying, deve-se considerar o tratamento da Classe II em duas fases, que pode ser uma excelente alternativa, devido às características que indicam essa abordagem. OBJETIVO: Descrever os resultados do tratamento ortodôntico em duas fases de um paciente com Classe II dentária e esquelética, sobressaliência de 10 mm, sobremordida exagerada e padrão facial braquicefálico, com queixas do comprometimento da estética dentária e qualidade de vida, além de histórico de bullying. RELATO DE CASO: Primeira fase do tratamento: aparelho funcional Twin- -Block, com objetivo de promover projeção mandibular, melhorar a discrepância esquelética e o perfil, impactando positivamente na estética e autopercepção. Segunda fase: aparelho ortodôntico fixo, para alinhamento, nivelamento e estabelecer oclusão funcional. RESULTADOS: Excelente oclusão posterior, sobremordida e sobressaliência adequadas, estética dentária e função. CONCLUSÃO: O diagnóstico antes do pico do surto de crescimento puberal e o correto manejo ortodôntico permitiram obter resultados estéticos e funcionais, sem a necessidade de extrações ou futura cirurgia ortognática, podendo ser uma estratégia anti-bullying, com efeitos positivos na autopercepção de adolescentes, além de ser considerado uma alternativa que pode proporcionar benefícios estéticos, funcionais e melhora relacionada à qualidade de vida que não seria obtida no tratamento em uma fase.
Tratamento de transposição de canino e incisivo lateral superior, auxiliado com miniparafuso intra-alveolar e molas em “T”: relato de caso
Authors: Villela Henrique Mascarenhas
Published: August 2023

INTRODUÇÃO: A transposição e a impacção dentárias são distúrbios relacionados à erupção ectópica ou à falha na erupção dentária. A transposição entre o incisivo lateral e o canino normalmente ocorre na maxila, sendo uma anomalia raramente observada na mandíbula. A correção da transposição representa um grande desafio na mecânica ortodôntica, principalmente nas transposições completas, exigindo estratégias mais complexas para efetuar o movimento radicular dos dentes envolvidos. OBJETIVO: O presente artigo apresenta uma alternativa de tratamento em um caso clínico de transposição dentária completa entre o canino e o incisivo lateral superior esquerdo. Foi utilizada ancoragem esquelética com um miniparafuso intra-alveolar para efetuar a distalização da coroa do canino e, posteriormente, foram utilizadas molas em “T” para efetuar a correção radicular dos dois dentes envolvidos. RESULTADOS: O tratamento ortodôntico obteve a correção da transposição dentária completa de forma eficiente, colocando o canino e o incisivo lateral nas suas corretas posições, sem problemas periodontais, com uma boa oclusão, revelando um excelente aspecto estético final. CONCLUSÃO: Para efetuar a correção da transposição dentária completa envolvendo canino e lateral superior, foi necessário utilizar estratégias específicas mais complexas da mecânica ortodôntica, com o objetivo de controlar com precisão o movimento dentário, devido à pouca disponibilidade de espaço ósseo nessa região da maxila.
Tratamento ortodôntico-cirúrgico da má oclusão de Classe III de Angle, com mordida aberta anterior
Authors: Barros Mariana de Matos Mori , Toledo Guilherme Lacerda
Published: August 2023

OBJETIVO: O objetivo do presente artigo foi relatar o caso clínico de uma paciente com má oclusão de Classe III de Angle e mordida aberta anterior. CASO CLÍNICO: A paciente havia sido submetida previamente a um tratamento ortodôntico, no qual não se conseguiu uma oclusão ideal. Na busca de um melhor equilíbrio esquelético e oclusal, decidiu-se pelo retratamento ortodôntico. Planejou-se uma abordagem ortodôntico-cirúrgica de avanço da maxila com rotação anti-horária da mandíbula, para correção da mordida aberta anterior, e mentoplastia. CONCLUSÃO: Ao fim do tratamento, obteve- se uma boa oclusão dentária, com guias funcionais adequadas e melhora no perfil e nos contornos faciais.
Alças ortodônticas: momento de ativação e momento residual
Authors: Martins Renato Parsekian
Published: August 2023

Introdução: O entendimento de como as alças ortodônticas funcionam é primordial para que o ortodontista defina qual alça controla melhor as raízes. Existem várias alças disponíveis e muitas escolas, com muitos gurus. Isso faz com que muitos ortodontistas utilizem uma alça, em detrimento de outra, pela escola onde estudou ou por ser o seguidor de alguma personalidade. Objetivo: Esse artigo visa explicar o que é momento de ativação e momento residual das alças para fechamento de espaços.
Prótese implantossuportada no local de incisivo lateral superior com ausência congênita: relato de caso com acompanhamento de 16 anos
Authors: Tanaka Orlando Motohiro , Mota Júnior Sergio Luiz , Bark Mohamad Jamal
Published: August 2023

Introdução: Pacientes com ausência de incisivo lateral superior geralmente precisam de um tratamento multidisciplinar, seja pela substituição do canino por um implante unitário ou uma prótese fixa. Objetivo: Relatar o caso clínico de um paciente do sexo masculino com 15 anos e 1 mês de idade, com má oclusão Classe I de Angle e Classe II esquelética, com agenesia do incisivo lateral superior direito. Descrição: Braquetes Edgewise Standard 0,022” x 0,028” foram colados em todos os dentes, e uma mola helicoidal aberta de aço inoxidável e uma corrente elástica foram usadas para recuperar o espaço entre o incisivo central superior direito e o canino, para reabilitação com prótese sobre implante. Resultados: O tratamento foi concluído com caninos e molares em relação de Classe I e a prótese sobre implante com boa relação oclusal e funcional. Conclusão: Os registros de acompanhamento após 16 anos mostram estabilidade oclusal, saúde gengival e periodontal.
Tratamento ortodôntico compensatório da má oclusão de Classe III com auxílio de dispositivos de ancoragem temporária: relato de caso
Authors: Neves Bruno Moreira das , Rocha Paola Casali , Capelli Junior Jonas
Published: August 2023

INTRODUÇÃO: Pacientes portadores de má oclusão de Classe III geralmente manifestam impactos negativos decorrentes dessa condição, seja em relação à estética facial ou função. Quando a má oclusão não compromete a estética facial, e a discrepância maxilomandibular não é excessiva, um tratamento ortodôntico-cirúrgico pode ser preterido em detrimento à compensação ortodôntica. RELATO DE CASO: Esse relato descreve o tratamento ortodôntico de uma paciente com 17 anos de idade, portadora de má oclusão de Classe III por protrusão mandibular, associada a mordida cruzada posterior e mordida anterior em topo-a-topo. A intervenção na dimensão transversa foi realizada com um aparelho de Porter. Para resolução da Classe III dentária e da mordida em topo-a-topo, o tratamento escolhido foi a compensação ortodôntica com auxílio de ancoragem óssea, para retração de toda a arcada inferior; sem interferência na face. RESULTADOS: As características faciais foram mantidas, com melhora importante na oclusão, resolvendo os problemas nos sentidos transverso e anteroposterior, apresentando relação de molares e caninos em Classe I; foram obtidas guias excursivas bem estabelecidas, além de sobremordida e sobressaliência adequadas. CONCLUSÃO: Devido à variedade de dispositivos e alternativas de abordagens, é importante identificar os limites de correção das discrepâncias ósseas e compensações dentárias, para escolher a terapêutica a ser adotada nos casos limítrofes; atentando-se, ainda, para as queixas do paciente. E, nesse relato de caso, a compensação da Classe III com auxílio de miniplacas mostrou-se uma alternativa acertada, restabelecendo a função e alcançando os objetivos do tratamento.
Looking Out the Window(s): How US Film Exhibitors Survived the Early Years of the COVID-19 Pandemic. An Interview with Jackie Brenneman and Bryan Braunlich of the National Association of Theater Owners and The Cinema Foundation
Authors: Orzel Charlotte , Melnick Ross
Published: August 2023

Interview with Jackie Brenneman and Bryan Braunlich of the National Association of Theater Owners (NATO) and The Cinema Foundation, in which they discuss their organizations’ response to the COVID-19 pandemic in defense of US cinema owners. Brenneman recounts the first three years of the pandemic, including NATO’s initial understandings and activities during the early weeks of the pandemic’s spread to the US. She details NATO’s role in government support programs, distribution challenges, and evolving industry narratives surrounding exhibition, as well as her own experiences working to assist in exhibition’s recovery. Brenneman also reflects on the broader impact of the pandemic on the industry after three years of struggle and adaptation. With Braunlich, she explains the goals, initiatives, and trajectory of The Cinema Foundation, a cross-industry organization founded in the wake of the pandemic to advocate for stakeholders across the exhibition sector.
El año asterisco en la exhibición cinematográfica en Argentina: ¿aceleración de procesos en curso?
Authors: González Leandro , Marino Santiago
Published: August 2023

El artículo aborda el impacto de la pandemia del Covid-19 en las salas de cine en Argentina. Partiendo de un conjunto de elementos teóricos que se nutren de la Economía Política de la Comunicación y una metodología que combina aspectos cualitativos y cuantitativos, ofrece un panorama global para contextualizar y analizar en profundidad el caso argentino. La hipótesis sostiene que las condiciones sanitarias establecidas por la pandemia aceleraron un proceso que sucedía por goteo: la caída en la asistencia a las salas de espectadores y el desplazamiento de los estrenos a las otras ventanas de exhibición, como las de consumo doméstico. Esto incidió en las estrategias que productores y exhibidores dieron para los estrenos. Concluimos que el cine no puede ser pensado por fuera del espacio audiovisual ampliado en el cual las plataformas OTT aparecen como nuevos actores dominantes de las cadenas de valor global del medio audiovisual.