bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of the plasticity of the surface layer of metal during rolling of cylindrical parts with a ball
Authors: Gunko Irina , Paladiy Maksym
Published: July 2022

The article deals with the study of the peculiarities of the process of plastic deformation of the surface layer of cylindrical parts during rolling with a ball. The stress-strain state and the regularities of its change, depending on the process parameters in the surface layer of the part, were determined by the slip line method and the finite element method.The vast majority of parts of mechanisms and machines work in contact with the relevant parts, namely various friction pairs, shafts, rollers, gears or tools, product housings, strikers, and so on. Specific requirements for these parts are due to the peculiarities of the operation of the latter. As a rule, it is impossible to meet all the requirements when making parts from one material. This mainly applies to the requirements of combining the high strength characteristics of the material of the internal volume of the part and the significant hardness of the same material on its surface in contact with the corresponding part. In addition, the surface of the parts under certain conditions must have high wear resistance and low coefficient of friction (antifriction parts) or high coefficient of friction (friction parts), or self-changing surface layer, and sometimes the entire surface must have some porosity and sweat during operation .The slip line method can be attributed to the traditional methods for solving problems of the theory of plasticity. This method can be used to solve problems in which the equations of equilibrium and plasticity create a closed system of differential equations of hyperbolic type. Therefore, this method can be used for solving plane problems, and only in some cases for solving axisymmetric problems. The solutions that can be obtained if a certain area of slip lines is directly known are called straight lines. When information about the shape of the initial slip lines is insufficient, inverse and semi-inverse methods are used.A numerical study of the regularities of damage accumulation was carried out, calculations of the accumulated deformation, the stress state index, and the distributions of the used plastic resource over the volume of the plastic zone when rolling with a ball in the environment of a specialized software complex were carried out. The adequacy of the model is checked in comparison with the available experimental data.On the basis of the research carried out in the article, recommendations can be developed for the choice of processing modes that provide the most rational parameters of the state of the surface layer of parts such as bodies of revolution.
Models of work of different technical systems on the basis of the similarity of graphs of their constructions
Authors: Zinko Roman , Skvarok Yurii , Martin Victor , Polyakov Andriy
Published: July 2022

For the analysis of designs of cars of various designs the idea of application of graphs of such designs is offered. Using structural notation of structural schemes of machines will organize and formalize the widest range of machines, apply the same method of recording them in a mathematical model based on the statement that schemes of structurally similar machines are described by similar differential equations, but the parameters of equations depend on operating conditions.In the conducted researches the process of analysis of constructive schemes of various machines was chosen as the object, and the subject of researches - methods which will allow to carry out the analysis of the car taking into account its constructive scheme. The task was to create a method of analysis of various structural schemes of machines and the use of the same type of mathematical models. A scientific novelty is the developed method of analysis of various structural schemes of machines and the use of the same type of mathematical models.Another feature of the proposed technique is that the set of features of the created machine also contains subsets of processes and phenomena in which the machine is involved. This allows you to assess the compliance of the process in which the machine is involved, and the modes of operation of the machine. For more accurate machine reproduction of the technological process, taking into account subsets of processes and phenomena, you can combine several phenomena.The methodology contains a section that describes the methods of creating new models of technology. Previously, such methods were described only phenomenologically (verbally). The use of predicates allowed to mathematize and organize the algorithms of these methods. This arrangement also makes it possible to classify them and determine the appropriateness of their use to solve certain design problems depending on their complexity.Another feature of the proposed technique is the use of articulated disjunction, which allows in many qualitative features of the design object on the basis of the selected criterion to reshape these features for the design of new machine designs.The application of the proposed technique is shown by the example of creating a rotary crushing machine with a crusher on an elastic base and a rigidly fixed rigid drive.
A semântica do pretérito imperfeito do indicativo com o verbo querer em português: modalidade e evidencialidade
Authors: De Paula Bruno Alves
Published: July 2022

Este artigo pretende analisar a semântica do Pretérito Imperfeito do Indicativo, com o verbo querer, do ponto de vista da modalidade e da evidencialidade. Trata-se, mais concretamente, de casos em que essa forma verbal deixa de expressar o seu valor básico,  temporal, para sinalizar um valor secundário, de cariz modal, sendo essas ocorrências de Imperfeito com leitura modal normalmente identificadas pela literatura linguística como um mesmo caso de “Imperfeito de Cortesia”. Buscar-se-á demonstrar que, a depender da evidência na base de uma enunciação com o verbo querer flexionado no Pretérito Imperfeito do Indicativo, haverá um ou outro posicionamento avaliativo do enunciador, sugerindo a existência de valores modais distintos, assinalados através da forma verbal em questão.
A função persuasiva da metáfora no discurso político: o caso das eleições municipais de Salvador (BA) em 2020
Authors: Santo Bruno
Published: July 2022

Segundo Soares da Silva & Leite (2015), Lakoff e Jonhson traçaram uma reviravolta nos estudos da metáfora a partir do lançamento da obra seminal da Linguística Cognitiva Metaphors We Live By (1980). Nesse trabalho os autores buscaram mostrar que a linguagem figurada configura e permeia não só a fala como também a atitude humana. Entretanto, essa apresentação inicial, conforme estudiosos contemporâneos da metaforicidade como Salomão (1999), Kövecses (2005), Vereza (2007) e Semino (2008) deixou de lado a apresentação de dados empíricos de pesquisa da linguagem efetivamente em uso. Portanto, para avançar neste ponto pesquisadores começaram a investigar a função da figuratividade no discurso. Nesse sentido, esta pesquisa buscará observar como a metaforicidade foi utilizada na tessitura textual dos discursos eleitorais dos dois candidatos mais bem colocados nas pesquisas de intenções de voto para a Prefeitura Municipal de Salvador em 2020, estes são: Bruno Reis (DEM) e Major Denice (PT). Com os resultados obtidos, esperamos contribuir para a reflexão acerca potencialidade do papel da metáfora na persuasão eleitoral política.
Interpretação de textos literários a partir de análises isoladas
Authors: Remígio Florêncio Roberto
Published: July 2022

O estudo procurou catalogar práticas de interpretação textual desenvolvidas pelos professores de Língua Portuguesa e Literatura Brasileira em escolas de Ensino Médio na cidade de Petrolina-PE. O projeto de pesquisa foi inicialmente idealizado com os objetivos de conhecer e analisar as práticas de leitura, além de oferecer material de pesquisa aos professores locais. Como resultado inicial, surgiu um acervo de informações atualizadas acerca das práticas de interpretação textual nas aulas de LP. Percebeu-se a necessidade de aprofundamento dos estudos específicos sobre os diversos tipos de análise, aqui denominadas Análises Isoladas (Estética, Estilística, Semântica e Pragmática). Os aportes teóricos foram baseados nos estudos sobre gêneros textuais, tipologia, figuras de linguagem e contextualização. A proposta final tomou ares de capacitação dos professores formados em Letras na construção/desenvolvimento e teorização de mecanismos de compreensão dos diversos gêneros textuais literários. O manuscrito apresenta interpretações e sinaliza para que o estudo desses aspectos isolados sirva exclusivamente para o aprofundamento teórico dos professores.
Interfaces do não desenvolvimento da maternidade na revista Pais & Filhos (1969-1972)
Authors: Martins Thayná Guedes Assunção , Marinho Joseanne Zingleara Soares
Published: July 2022

A maternidade, sobretudo ao longo do século XX, foi uma condição sobre a qual foram realizadas fortes investidas sociais a partir das mentes e corpos femininos. Aquelas que se encontravam distantes do modelo de mulher pautado pelo matrimônio, maternidade e dedicação ao lar, eram incorporadas ao campo do diferente, inviabilizado e, muitas vezes, do patológico. Contudo, ao se aproximar do século XXI foi se tornando cada vez mais insustentável manter essas mulheres no campo do não visto. Dessa forma, este estudo se propõe a analisar as representações sobre o não exercício da maternidade a partir das reportagens da revista Pais & Filhos, um periódico de circulação nacional que tinha como foco leitor as mulheres mães, sob o recorte temporal de 1969 a 1972. A análise enfoca a visão incorporada pelo periódico no que tange ao não desenvolvimento da atividade maternal, abordando aspectos variados dessa condição, como a questão da relação com o trabalho e a saúde a partir de temáticas sobre o aborto e a contracepção, assuntos que se entrelaçam no cerne da condição não materna.

Palavras-chave: História. Gênero. Não maternidade. Revista Pais & Filhos.
Minimally invasive lateral retroperitoneal transpsoas approach for lumbar corpectomy and fusion with posterior instrumentation
Authors: Srinivasan Ethan S. , Wang Timothy Y. , Rapoport Anna , Erickson Melissa M. , Abd-El-Barr Muhammad M. , Shaffrey Christopher I. , Than Khoi D.
Published: July 2022

In this video, the authors highlight the operative treatment of a 55-year-old man with chronic osteomyelitis discitis. The operation entailed a minimally invasive lateral retroperitoneal transpsoas approach for L3 and L4 corpectomies, L2–5 interbody fusion, and L2–5 minimally invasive posterior instrumentation. The operation proceeded in two stages, beginning in the lateral position with corpectomy of the L3 and L4 vertebral bodies and placement of a corpectomy cage. After closure of this access wound, the patient was turned to a prone position for the posterior element of the operation. Posterior instrumentation was placed with pedicle screws at L2 and L5.

The video can be found here: https://stream.cadmore.media/r10.3171/2022.3.FOCVID2210
Navigated retrodiaphragmatic/retroperitoneal approach for the treatment of symptomatic kyphoscoliosis: an operative video
Authors: Strong Michael J. , Linzey Joseph R. , Zaki Mark M. , Joshi Rushikesh S. , Ward Ayobami , Yee Timothy J. , Khalsa Siri Sahib S. , Saadeh Yamaan S. , Park Paul
Published: July 2022

Retropleural, retrodiaphragmatic, and retroperitoneal approaches are utilized to access difficult thoracolumbar junction (T10–L2) pathology. The authors present a 58-year-old man with chronic low-back pain who failed years of conservative therapy. Preoperative radiographs demonstrated significant levoconvex scoliosis with coronal and sagittal imbalance. He underwent a retrodiaphragmatic/retroperitoneal approach for T12–L1, L1–2, L2–3, and L3–4 interbody release and fusion in conjunction with second-stage facet osteotomies, L4–5 TLIF, and T10–iliac posterior instrumented fusion. This video focuses on the retrodiaphragmatic approach assisted by 3D navigation.

The video can be found here: https://stream.cadmore.media/r10.3171/2022.3.FOCVID2215
Principles and strategies for step-by-step AVM excision
Authors: Agosti Edoardo , Graepel Stephen , Lanzino Giuseppe
Published: July 2022

Arteriovenous malformations (AVMs) are some of the most challenging surgical entities. Like any challenging surgical procedure, AVM surgery is a series of basic but fundamental steps, each with its own nuances. Despite a myriad of published material regarding AVMs, there are few succinct illustrated summaries of these steps with an accompanying elucidation of the most common pitfalls. This paper provides a step-by-step description and illustration of the basic surgical principles of AVM microsurgical resection, focusing on the main key points and addressing the critical issues that surround this surgery. Deep anatomical knowledge and presurgical planning of these basic steps, combined with good contingency management skills, are paramount for an effective and safe AVM surgery.
Ischemia-induced inflammation in arteriovenous malformations
Authors: Rodemerk Jan , Oppong Marvin Darkwah , Junker Andreas , Deuschl Cornelius , Forsting Michael , Zhu Yuan , Dammann Philipp , Uerschels Anne , Jabbarli Ramazan , Sure Ulrich , Wrede Karsten H.
Published: July 2022

OBJECTIVE

The pathophysiology of development, growth, and rupture of arteriovenous malformations (AVMs) is only partially understood. However, inflammation is known to play an essential role in many vascular diseases. This feasibility study was conducted to investigate the expression of enzymes (cyclooxygenase 2 [COX-2] and NLRP3 [NOD-, LRR-, and pyrin domain–containing protein 3]) in the AVM nidus that are essential in their inflammatory pathways and to explore how these influence the pathophysiology of AVMs.

METHODS

The study group comprised 21 patients with partially thrombosed AVMs. The cohort included 8 ruptured and 13 unruptured AVMs, which had all been treated microsurgically. The formaldehyde-fixed and paraffin-embedded samples were immunohistochemically stained with a monoclonal antibody against COX-2 and NLRP3 (COX-2 clone: CX-294; NLRP3: ab214185). The authors correlated MRI and clinical data with immunohistochemistry, using the Trainable Weka Segmentation algorithm for analysis.

RESULTS

The median AVM volume was 2240 mm3. The proportion of NLRP3-positive cells was significantly higher (26.23%–83.95%), compared to COX-2 positive cells (0.25%–14.94%, p < 0.0001). Ruptured AVMs had no higher expression of NLRP3 (p = 0.39) or COX-2 (p = 0.44), compared to nonruptured AVMs. Moreover, no patient characteristics could be reported that showed significant correlations to the enzyme expression.

CONCLUSIONS

NLRP3 consistently showed an approximately 10-fold higher expression level than COX-2, making the inflammatory process in AVMs appear to be mainly associated with ischemic (NLRP3)–driven rather than with mechanical (COX-2)–driven inflammatory pathways. No direct associations between NLRP3 and COX-2 expression and radiological, standard histopathological, or patient characteristics were found in this cohort.
More pronounced hemodynamic alterations in patients with brain arteriovenous malformation–associated epilepsy
Authors: Sebök Martina , Germans Menno Robbert , Niftrik Christiaan Hendrik Bas van , Kulcsár Zsolt , Regli Luca , Fierstra Jorn
Published: July 2022

OBJECTIVE

Epileptic seizures in patients with brain arteriovenous malformations (bAVMs) may be caused by hemodynamic alterations due to the complex angioarchitecture of bAVMs. In particular, an arterial steal phenomenon and venous outflow disruption may play an etiological role in seizure development but remain challenging to demonstrate quantitatively. Blood oxygenation level–dependent (BOLD) cerebrovascular reactivity (CVR) imaging is an emerging technique that can measure both arterial steal phenomenon (as a paradoxical BOLD signal decrease during a vasodilatory stimulus) and impaired perinidal BOLD-CVR (which has been found in the presence of venous congestion on conventional angiography in bAVM patients with epilepsy). By applying this innovative BOLD-CVR technique, the aim is to better study CVR patterns and their correlation with morphological features on conventional angiography in patients with bAVM with and without epilepsy.

METHODS

Twenty-two patients with unruptured and previously untreated bAVMs (8 with and 14 without epilepsy) were included in this case-control study. Quantitative CVR measurements were derived from BOLD functional MRI volumes using a novel standardized and precise hypercapnic stimulus (i.e., % BOLD/mm Hg CO2). In addition, 22 matched healthy controls underwent an identical BOLD-CVR study. Evaluation of venous congestion was performed on conventional angiography for all patients with bAVM.

RESULTS

Patients with bAVM-associated epilepsy showed impaired whole-brain BOLD-CVR compared to those in the nonepilepsy group, even after correction for AVM volume and AVM grade (epilepsy vs nonepilepsy group: 0.17 ± 0.07 vs 0.25 ± 0.07, p = 0.04). A BOLD-CVR–derived arterial steal phenomenon was observed in 2 patients with epilepsy (25%). Venous congestion was noted in 3 patients with epilepsy (38%) and in 1 patient without epilepsy (7%; p = 0.08).

CONCLUSIONS

These data suggest that whole-brain CVR impairment, and more pronounced hemodynamic alterations (i.e., arterial steal phenomenon and venous outflow restriction), may be more present in patients with bAVM-associated epilepsy. The association of impaired BOLD-CVR and bAVM-associated epilepsy will need further investigation in a larger patient cohort.
Endovascular treatment as the first-line approach for cure of low-grade brain arteriovenous malformation
Authors: Razavi Seyed Ali Shariat , Mirbolouk Mohammad Hossein , Gorji Reza , Ebrahimnia Feizollah , Sasannejad Payam , Zabihyan Samira , Seraj Farid Qoorchi Moheb , Etemadrezaie Hamid , Esmaeilzadeh Mahla , Blanc Raphaël , Piotin Michel , Baharvahdat Humain
Published: July 2022

OBJECTIVE

While microsurgery has been proposed as the first-line treatment for patients with low-grade (Spetzler-Martin grade I or II) brain arteriovenous malformations (bAVMs), recent studies have shown promising results for endovascular treatment (EVT) as a single proper choice for the management of this group of bAVMs. In this study, the authors evaluated the safety and efficacy of EVT as a first-line strategy for curing low-grade bAVMs at their center.

METHODS

All patients with low-grade bAVMs managed primarily by EVT between 2015 and 2021 were enrolled in this study. Patients were evaluated and treated by the same team and followed with the same protocol. The primary endpoint was the efficacy of EVT on the cure of low-grade bAVMs. The second endpoint was the safety of EVT for the treatment of low-grade bAVMs, including procedural complications and long-term clinical outcomes.

RESULTS

A total of 109 patients were enrolled and represented in the study population. The mean patient age was 31.6 ± 14.8 years. Forty-eight AVMs (44%) were Spetzler-Martin grade I and 61 (56%) were grade II. Of 99 patients who completed their EVT sessions, complete exclusion was achieved in 89 patients (89.9%). Overall, complete exclusion was achieved in 59.6% of patients after a single EVT session. At the 6-month follow-up, 106 patients (97.2%) had a favorable outcome. Four patients (4.6%) experienced transient neurological deficits, and 1 patient (0.9%) had a permanent neurological deficit.

CONCLUSIONS

EVT can be offered as the first choice of treatment for select patients with low-grade bAVMs, with a high cure rate and low morbidity.
Head and neck arteriovenous malformations: University of Tennessee experience, 2012–2022
Authors: Dawkins Demi , Motiwala Mustafa , Peterson Jeremy , Gleysteen John , Fowler Brian , Arthur Adam , Elijovich Lucas
Published: July 2022

OBJECTIVE

Head and neck arteriovenous malformations (AVMs) are complex lesions that represent a subset of vascular anomalies (VAs). The authors present an analysis of their institutional experience managing these lesions as a multidisciplinary team.

METHODS

A retrospective chart review was performed of head and neck AVM patients treated at the authors’ institution from 2012 to 2022. Recorded data included patient demographic characteristics, details of clinical presentation, Schöbinger clinical scale and Yakes AVM classification results, and details of all endovascular and surgical treatments. The primary outcome of the study was clinical response to treatment. Angiographic occlusion and complication rates were reported. Chi-square tests were used for comparative statistics.

RESULTS

Sixteen patients (9 female, 56%) with AVMs of the head and neck presented from age 3 to 77 years. The Schöbinger stage was stage II in 56% of patients (n = 9) and stage III in 44% of patients (n = 7). The Yakes AVM classification was nidus type (2a, 2b, or 4) in 7 patients (43%) and fistula type (1, 3a, or 3b) in 9 patients (57%). The majority of patients (n = 11, 69.0%) were managed with embolization as the only treatment modality, with an average of 1.5 embolizations/patient (range 1–3). Surgical resection was employed in 5 patients (4 in combination with embolization). Symptom resolution and symptom control were achieved in 69% and 31% of patients, respectively, in the entire cohort. A radiographic cure was demonstrated in 50% of patients. There were no statistical differences in clinical outcomes or radiographic cure rates between patients treated with different modalities.

CONCLUSIONS

Head and neck AVMs can be treated successfully with a primarily endovascular management strategy by a multidisciplinary team with the goal of symptomatic control.
Cerebral vasospasm following arteriovenous malformation rupture: a population-based cross-sectional study
Authors: Dicpinigaitis Alis J. , Feldstein Eric , Shapiro Steven D. , Kamal Haris , Bauerschmidt Andrew , Rosenberg Jon , Amuluru Krishna , Pisapia Jared , Dangayach Neha S. , Liang John W. , Bowers Christian A. , Mayer Stephan A. , Gandhi Chirag D. , Al-Mufti Fawaz
Published: July 2022

OBJECTIVE

Studies examining the risk factors and clinical outcomes of arterial vasospasm secondary to cerebral arteriovenous malformation (cAVM) rupture are scarce in the literature. The authors used a population-based national registry to investigate this largely unexamined clinical entity.

METHODS

Admissions for adult patients with cAVM ruptures were identified in the National Inpatient Sample during the period from 2015 to 2019. Complex samples multivariable logistic regression and chi-square automatic interaction detection (CHAID) decision tree analyses were performed to identify significant associations between clinical covariates and the development of vasospasm, and a cAVM–vasospasm predictive model (cAVM-VPM) was generated based on the effect sizes of these parameters.

RESULTS

Among 7215 cAVM patients identified, 935 developed vasospasm, corresponding to an incidence rate of 13.0%; 110 of these patients (11.8%) subsequently progressed to delayed cerebral ischemia (DCI). Multivariable adjusted modeling identified the following baseline clinical covariates: decreasing age by decade (adjusted odds ratio [aOR] 0.87, 95% CI 0.83–0.92; p < 0.001), female sex (aOR 1.68, 95% CI 1.45–1.95; p < 0.001), admission Glasgow Coma Scale score < 9 (aOR 1.34, 95% CI 1.01–1.79; p = 0.045), intraventricular hemorrhage (aOR 1.87, 95% CI 1.17–2.98; p = 0.009), hypertension (aOR 1.77, 95% CI 1.50–2.08; p < 0.001), obesity (aOR 0.68, 95% CI 0.55–0.84; p < 0.001), congestive heart failure (aOR 1.34, 95% CI 1.01–1.78; p = 0.043), tobacco smoking (aOR 1.48, 95% CI 1.23–1.78; p < 0.019), and hospitalization events (leukocytosis [aOR 1.64, 95% CI 1.32–2.04; p < 0.001], hyponatremia [aOR 1.66, 95% CI 1.39–1.98; p < 0.001], and acute hypotension [aOR 1.67, 95% CI 1.31–2.11; p < 0.001]) independently associated with the development of vasospasm. Intraparenchymal and subarachnoid hemorrhage were not associated with the development of vasospasm following multivariable adjustment. Among significant associations, a CHAID decision tree algorithm identified age 50–59 years (parent node), hyponatremia, and leukocytosis as important determinants of vasospasm development. The cAVM-VPM achieved an area under the curve of 0.65 (sensitivity 0.70, specificity 0.53). Progression to DCI, but not vasospasm alone, was independently associated with in-hospital mortality (aOR 2.35, 95% CI 1.29–4.31; p = 0.016) and lower likelihood of routine discharge (aOR 0.62, 95% CI 0.41–0.96; p = 0.031).

CONCLUSIONS

This large-scale assessment of vasospasm in cAVM identifies common clinical risk factors and establishes progression to DCI as a predictor of poor neurological outcomes.
De novo epilepsy after microsurgical resection of brain arteriovenous malformations
Authors: Sen Rajeev D. , Nistal Dominic , McGrath Margaret , Barros Guilherme , Shenoy Varadaraya Satyanarayan , Sekhar Laligam N. , Levitt Michael R. , Kim Louis J.
Published: July 2022

OBJECTIVE

Seizures are the second most common presenting symptom of brain arteriovenous malformations (bAVMs) after hemorrhage. Risk factors for preoperative seizures and subsequent seizure control outcomes have been well studied. There is a paucity of literature on postoperative, de novo seizures in initially seizure-naïve patients who undergo resection. Whereas this entity has been documented after craniotomy for a wide variety of neurosurgically treated pathologies including tumors, trauma, and aneurysms, de novo seizures after bAVM resection are poorly studied. Given the debilitating nature of epilepsy, the purpose of this study was to elucidate the incidence and risk factors associated with de novo epilepsy after bAVM resection.

METHODS

A retrospective review of patients who underwent resection of a bAVM over a 15-year period was performed. Patients who did not present with seizure were included, and the primary outcome was de novo epilepsy (i.e., a seizure disorder that only manifested after surgery). Demographic, clinical, and radiographic characteristics were compared between patients with and without postoperative epilepsy. Subgroup analysis was conducted on the ruptured bAVMs.

RESULTS

From a cohort of 198 patients who underwent resection of a bAVM during the study period, 111 supratentorial ruptured and unruptured bAVMs that did not present with seizure were included. Twenty-one patients (19%) developed de novo epilepsy. One-year cumulative rates of developing de novo epilepsy were 9% for the overall cohort and 8.5% for the cohort with ruptured bAVMs. There were no significant differences between the epilepsy and no-epilepsy groups overall; however, the de novo epilepsy group was younger in the cohort with ruptured bAVMs (28.7 ± 11.7 vs 35.1 ± 19.9 years; p = 0.04). The mean time between resection and first seizure was 26.0 ± 40.4 months, with the longest time being 14 years. Subgroup analysis of the ruptured and endovascular embolization cohorts did not reveal any significant differences. Of the patients who developed poorly controlled epilepsy (defined as Engel class III–IV), all had a history of hemorrhage and half had bAVMs located in the temporal lobe.

CONCLUSIONS

De novo epilepsy after bAVM resection occurs at an annual cumulative risk of 9%, with potentially long-term onset. Younger age may be a risk factor in patients who present with rupture. The development of poorly controlled epilepsy may be associated with temporal lobe location and a delay between hemorrhage and resection.
Varicella Pneumonia in an Immunocompetent Middle-aged Adult Male: A Case Report
Authors: Shrestha Nischal , Bhatta Karuna , Rai Anjan , Khatun Sanzida
Published: July 2022

Varicella pneumonia is uncommon among adults and can present as potentially life-threatening complications of varicella. Here we report a case of a 43-year-old man with no known history of chronic disease and no allergic history who presented to our hospital emergency department with widespread skin eruptions over the entire body and hemoptysis. Varicella pneumonia was diagnosed based on the patient being in contact with his 6-year-old son who had contracted chickenpox 10 days back, typical cutaneous lesions, pulmonary symptoms and radiographic findings. The patient was treated with oral acyclovir and was admitted to the intensive care unit for monitoring. The patient recovered completely after 10 days of treatment.
Extraosseous Ewing Sarcoma in a Pelvic Region: A Case Report
Authors: Gurung Sushma , Thapa Sagun , Gautam Shristi
Published: July 2022

Ewing sarcoma is the second most common malignant bone tumour in children. It rarely originates from extraskeletal soft tissue sites such as the upper thigh, buttocks, upper arm and shoulder. Primary extraosseous Ewing sarcoma located in the pelvic region is rare. We report a 17-year-female who had gradual onset of progressive lower abdominal mass and pain. A computed tomography scan revealed well defined lobulated heterogeneously enhancing lesion noted in the pelvic region measuring approximately 12.9 x 9.8 x 9.3 cm. Incisional biopsy showed a small round blue cell tumour which was strongly positive for Cluster of Differentiation 99, vimentin, Friend Leukaemia Integration 1 with 40% Ki-67. Following treatment with chemotherapy, surgery and radiotherapy, there was complete resolution of the tumour. Although extraosseous Ewing sarcoma is rare, it can occur virtually in any soft tissue site. Therefore, clinicians need to distinguish it from soft tissue sarcoma because rapid progression, early diagnosis and timely treatment are crucial for a favourable prognosis.
Unicystic Ameloblastoma of Mandible: A Case Report
Authors: Rayamajhi Sushil , Shrestha Sunita , Shakya Samata , Bhandari Sagar , Twayana Anu Radha , Shahi Kopila
Published: July 2022

Ameloblastomas of jaws are benign odontogenic tumors of epithelial origin with four clinical variants: solid multicystic type, unicystic type, desmoplastic type, and extraosseous type. The incidence rate of ameloblastoma is 0.92 per million person-years. Unicystic ameloblastoma refers to those cystic lesions that show clinical and radiologic characteristics of an odontogenic cyst but shows a typical ameloblastomatous epithelium lining part of the cyst cavity, with or without luminal and/or mural tumor proliferation on histological examination. Here is a unique case of unicystic ameloblastoma involving the mandible in a 70-year-old patient. The case was managed by segmental mandibulectomy and flap repair. Unicystic ameloblastoma accounts for only 13% of all known cases in scientific literature. Considering the rarity of the lesion, the purpose of presenting this report on a clinical case is to emphasize the importance of radiological evaluation and histopathological examination for the diagnosis of ameloblastoma.
D-penicillamine Induced Myasthenia Gravis in Wilson’s Disease: A Case Report
Authors: Thapa Lekhjung , Thapa Monika , Bhattarai Suman , Shrestha Abhishek Man , Sharma Nooma , Rai Nilshan , Pokharel Merina , Paudel Raju
Published: July 2022

Myasthenia gravis is a neuromuscular junction disorder characterised by fluctuating muscle weakness, improved by using anti-cholinesterase drugs. In addition to the autoimmune aetiology, various factors such as infections, surgery, and drugs are known to precipitate the condition. We report a case of a 15-year-old boy with D-penicillamine-induced myasthenia gravis who presented with facial diplegia, dysphagia, and drooling of saliva, 6 years after the initiation of treatment for Wilson’s disease. Therefore, clinicians should be more vigilant while prescribing patients with chelating drugs like D-penicillamine with regular monitoring of the new symptoms and keeping a very low threshold for the suspicion of myasthenia gravis.
Interim Electoral Management and Electoral System Design in Myanmar: International IDEA Policy Paper No. 25, June 2022
Authors: Ebead Nathalie
Published: July 2022

In the current interim period in Myanmar, with an illegitimate military regime in power and efforts by the interim governance institutions under way to build and enable a transition to a genuine democracy, the formation of an interim electoral management body—like a government and a legislature—is urgent and necessary as a key institution to support and prepare for the restoration of democracy. There are no standard models for establishing electoral management bodies in transition periods and during conflict. However, it is important that key stakeholders in Myanmar agree on a road map for future constitutional and electoral reform informed by the lessons learned from the 2015 and 2020 general elections.
PELATIHAN PEMANFAATAN APLIKASI GOOGLE DATA STUDIO UNTUK VISUALISASI DATA DI SMK TEKNOLOGI RIAU
Authors: Syam Febrizal Alfarasy , Yuvi Darmayunata  , Lucky Lhaura Van FC
Published: July 2022

Pengabdian ini dilakukan di Sekolah Menengah Kejuruan (SMK) Teknologi Riau, berupa pelatihan kepada guru dan staff terhadap pemanfaatan google data studio untuk menvisualisasikan data yang ada di SMK Teknologi Riau secara online. Saat ini data yang ada di SMK Teknologi masih tersimpan di perangkat komputer yang dimiliki oleh SMK Teknologi Riau , namun data tersebut belum dapat memberikan informasi kepada civitas akademika maupun masyarakat secara langsung. Jika civitas akademika  atau masyarakat  ingin mendapatkan informasi terkait data yang ada di SMK Teknologi Riau, maka harus melalui staff terlebih dahulu karena hak aksesnya yang terbatas. Data yang ada juga masih dalam bentuk data mentah dan bentuk tampilan datanya juga kurang menarik.  Oleh karena itu diperlukan suatu media yang dapat mengatasi hal tersebut. Pada pengabdian ini kami akan memberikan solusi dengan pemanfaatan google data studio untuk menvisualisasikan data agar lebih menarik sehingga dapat ditampilkan pada website SMK Teknologi Riau. Berdasarkan hasil kuesioner post test, pemahaman peserta terhadap aplikasi google data studio sudah baik yaitu 100% menyatakan paham tentang dasar penggunaan aplikasi. Berdasarkan pengamatan tim pengabdian, peserta sangat antusias mengikuti pelatihan yang diberikan.
PKM PELATIHAN PEMBUATAN GAME MENGGUNAKAN UNITY UNTUK SISWA SMK DI KOTA PEKANBARU
Authors: Nurliana Nasution  , Feldiansyah Bakri Nasution  , Hasan Mhd Arief
Published: July 2022

Pengabdian Masyarakat ini mengangkat kegiatan mengenai pelatihan pembuatan Game menggunakan Game Engine Unity. Unity merupakan salah satu Game Engine terpopuler saat ini. Dikarenakan game engine ini mampu untuk menghasilkan game lintas platform sistem operasi. PKM ini diadakan bersama siswa SMK N 8 Pekanbaru. Kegiatan ini di adakan di Fakultas Ilmu Komputer Universitas Lancang Kuning. Dari kegiatan ini peserta diajarkan step-step pembuatan aplikasi menggunakan unity. Peserta diajarkan teknik instalasi, pembuatan objek dasar dan game dasar. Evaluasi kegiatan berupa beberapa tugas latihan dari pemateri yang dikumpulkan di kemudian hari. Tugas ini dikerjakan disekolah mereka masing-masing. Hasil dari penghargaan peserta ini diberikan berupa sertifikat kepada masing-masing peserta. Hasil pekerjaan projek terbaik diberikan hadiah tambahan dari pemateri.
Ibm Konten Promosi Wisata Okura Dimedia Sosial
Authors: Hardianto Roki , Wirdahchoiriah  , Fana Wiza
Published: July 2022

Pengabdian dilaksanakan di kelurahan Okura, Kecamatan Rumbai, Kota Pekanbaru. Pengabdian berfokus melakukan pelatihan membuat konten promosi wisata yang dapat digunakan sebagai media promosi di sosial media. Karena Okura merupakan kelurahan destinasi wisata yang dekat dengan kota Pekanbaru. Saat ini Okura memiliki beberapa destinasi wisata diantaranya taman bunga impian okura, wisata dakwah okura, susur sungai ukai, taman buah, dan destinasi wisata lainnya. Sejak pandemi covid-19, pelaku wisata okura merasa wisata tidak bergerak sehingga memerlukan penyegaran dalam pelaksanaan wisata di era new normal. Pelaku wisata di okura belum memiliki kemampuan IT dalam melakukan promosi secara online khususnya sosial media. Selama ini tenaga IT biasanya dari pihak ketiga, memang beberapa objek wisata sudah memilki tenaga IT sendiri, tetapi pengakuan pelaku wisata meraka memerlukan penyegaran lagi. Kedepannya Okura akan dijadikan desa binaan Fakultas Ilmu Komputer Universitas Lancang Kuning, hal ini sebagai tindaklanjut dari kegiatan ini. Luaran dari kegiatan ini adalah konten promosi yang dipublish di sosial media official okura, jurnal pengabdian yang dipublikasi secara nasional, berita kegiatan pengabdian yang dipublikasi pada portal media online nasional.
Radiation Pattern Synthesis Method of Antenna Arrays with an Arbitrary Arrangement of Radiating Elements
Authors: Andropov A. , Kuzmin S.
Published: July 2022

As a result of the analysis of methods for synthesizing radiation patterns, in order to find the required amplitude-phase distribution in antenna arrays with an arbitrary arrangement of radiating elements, a technique based on the method of partial radiation patterns is proposed. The results of implementing the technique for a lowprofile combined ring concentric antenna array, a five-element antenna array based on asymmetric wave channel antennas, and a conformal antenna array consisting of arbitrarily located PIFA antennas are presented. The calculated amplitude-phase distributions and radiation patterns are given. The technique makes it possible to evaluate the potential capabilities of antennas, with adaptation taking into account the mutual coupling.
Effective Channel Planning of IEEE 802.11 Networks as a Plane Tessellation Problem. Part 1. Adjacent Channel Interference Model
Authors: Vikulov A.
Published: July 2022

IEEE 802.11 wireless networks design process is impossible without a correct choice of a channel plan, i.e. a set of channels of a given type. This is especially important because channel planning of a distributed network heavily depends on the network designer’s and administrator’s decisions. Additionally, the central frequencies of the channels provided by the standard do not mean that the channels are non-overlapping. However, considering the coverage of a flat area as a plane tessellation by coverage areas of access points, for a particular regular structure geometry, it is necessary to choose the best channel planning solution among the possible ones. To do this, it is required to consider practically applicable channel planning cases, which use different numbers of channels, as a plane tessellation problem, also taking into account the overlapping of their spectral masks. This paper considers channel planning of IEEE 802.11 networks as a plane tessellation with regular structures and proposes a model that takes into account the effects of adjacent-channel interference, provides evaluation criteria, and thus is applicable to select the best channel configuration for the corresponding regular structure.
Hyperoside Facilitates Gastric Cancer (GC) Cell Apoptosis and Inhibits Viability via NF-κB/PTEN/JAK2 Pathway
Authors: Shu Bo
Published: July 2022

This study investigated impacts of hyperoside on viabilities and apoptosis of gastric cancer (GC) cells. CCK-8 and flow cytometry were applied for examining HGC-27 cell viabilities and apoptosis, indicating that hyperoside treatment suppressed cell viabilities but facilitated cell apoptosis. Additionally, RT-qPCR results revealed that mRNA expressions of Bcl-2 in HGC-27 cells were downregulated while Bax and caspase-3 were elevated with hyperoside treatment. Furthermore, ELISA examined changes about protein concentrations of NF-κB/PTEN/JAK signalling pathway in HGC-27 cells after being treated by hyperoside. Results showed that protein concentrations of phosphorylated NF-κB/ p65 were reduced with hyperoside treatment while PTEN and JAK2 protein concentrations were promoted.
The Importance of Value Creation Process in Marketing
Authors: Turcas I. , Tescasiu B.
Published: July 2022

This paper discusses the use of the term “value” in the framework of marketing aiming to identify the major approaches from the shareholders and customer perspectives. Throughout the extensive literature, it’s been proven that the value creation process is considered extremely important, therefore, this paper tries to encompass the main definitions and approaches regarding the value creation process. The results describe the interdependency between the strategic goals of the organizations and the value perception of customers.
The Activity Based Costing Method Applied to the Analysis of the Clients' Profitability
Authors: Anton Carmen E.
Published: July 2022

The paper presents the Activity Based Costing (ABC) method and its application in analyzing the clients’ profitability. The case study is outlined using the data of an accounting services company, and it aims at investigating the profitability of the clients and group them according to their contribution to profit. Compared to traditional methods, the results obtained by applying the ABC method are more nuanced and less subjective and contribute to the decision-making process by the company’s management, as the allocation of overheads to the cost of the product is more thorough.
Event Management of Kurenah Ibuah Festival in Payakumbuh as a Domestic Tourism Alternative during the Pandemic: A Study of Community Festival
Authors:   Akademi Pariwisata Paramitha Bukittinggi, Yuliza Fresti
Published: July 2022

The world of tourism in West Sumatra, including in Payakumbuh City, experienced a significant degradation during the Covid-19 pandemic. Various tourism events are not held in line with the recommendation for social distancing. This study aims to analyze the Kurenah Ibu Festival activities as an alternative to domestic tourism during the Covid 19 pandemic in West Sumatra. This research was conducted with a qualitative approach adapted to the context of tourism and event research, with content analysis methods that consider several factors from the festival management. The results showed that the management of the Kurenah Ibu Festival as an alternative domestic tourism destination during the Covid 19 pandemic was made possible by several factors, namely: first, choosing a strategic location that is easily accessible by visitors from various directions; second, materials are varied choices that can attract visitors of all ages; three, the application of the CHSE protocol which guarantees health, safety, and security; and four, combining online and offline formats that allow the public from far away to access activities while reducing the number of visitors at the festival. The concept of the Community Festival offered by Kurenah Ibuah Festival, can be a model for the implementation of Tourism Events in the context of the post-pandemic resilience process.
Prediction Model of Related Factors with Youth Fertility in Kalimantan
Authors: Kurniatin Lydia Febri , Marsita Elma , Irawaty Dian Kristiani , Elfiyan Indra
Published: July 2022

Adolescent fertility is an essential issue because it is associated with the level of morbidity and mortality of mothers and children. Kalimantan provinces own fertility problems. Teenagers are still complex, including Age Specific Fertility Rate 15-19 years is still significant. It is recorded that 4.6% of children aged 10-17 years in Kalimantan have got married. The objective of this study is to identify the predictive model of factors correlated with provincial youth fertility in Kalimantan. The analysis was conducted by employing descriptive and inferential methods and binary logistic regression. The results of the study were among 433 adolescents in Kalimantan, 11% were married, 9.9% had given birth or were pregnant with their first child, 14.1% experienced sexual relations and 3.1% encountered sex at <15 years of age. The data employed was the 2017 Indonesian Health Demographic Survey with a unit of analysis for adolescents aged 15-19 years in 5 provinces in Kalimantan totaling 433 respondents. The sampling technique employed total sampling. Statistically, it is discovered a significant relationship between age, marital status, adolescent sexual behavior, contraceptive use status, education level, economic status, and access to the internet with youth fertility in Kalimantan. The results of logistic regression analysis displayed that the variable of family planning use possess the most effect on adolescent fertility simultaneously with the strength of the relationship OR (Expβ) = 0.2.  Suggestions for further research to further scrutinize relevant programs such as maturing age at marriage and parenting skill to suppress adolescent fertility.
Relationship between Procalcitonin Levels (PCT) and Disease Severity in Hospitalized Patients Confirmed Positive for COVID-19
Authors: Fajrunni'mah Rizana , Rada Fransiska , Widhyasih Retno Martini
Published: July 2022

Coronavirus Disease 2019 (COVID-19) is an infectious disease caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). This disease attacks the respiratory tract and spreads rapidly almost throughout the world, hence, WHO has declared COVID-19 as a global pandemic. The presence of inflammation and bacterial co-infection in COVID-19 hospitalized patients can increase procalcitonin (PCT) levels as a biomarker of inflammation. Elevated PCT levels are also associated with disease severity. The objective of this study is to determine the relationship between PCT levels and disease severity in hospitalized patients who are confirmed positive for COVID-19. This research method is analytic observational with cross sectional design. The sample is in the form of medical record data for 180 COVID-19 patients who are hospitalized at Bhayangkara Tk. I Raden Said Sukanto Hospital, Jakarta for the period July-December 2020. The relationship between PCT levels and disease severity was statistically analyzed using the Chi Square test. The results of this study were 109 (60.6%) men and 71 (39.4%) women with the highest age group being 46-59 years. The average PCT level was 10.38 ng/mL with the lowest level of 0.01 ng/mL and the highest level of 282.00 ng/mL. PCT levels <0.5 ng/mL were discovered in 111 patients (61.7%) and PCT levels 0.5 ng/mL in 69 patients (38.3%). The severity of disease in mild-moderate illness was 87 patients (48.4%), severe was 35 patients (19.4%), and critical was 58 patients (32.2%). The Chi Square test showed that there was a relationship between PCT levels and disease severity in COVID-19 patients (p = 0.000). The higher the PCT level, the higher the severity of the disease, thus, PCT can be used as an indicator to see the severity of the disease.
Generalized Woodall Numbers: An Investigation of Properties of Woodall and Cullen Numbers via Their Third Order Linear Recurrence Relations
Authors: SOYKAN Yüksel , İRGE Vedat
Published: July 2022

In this paper, we investigate the generalized Woodall sequences and we deal with, in detail, four special cases, namely, modified Woodall, modified Cullen, Woodall and Cullen sequences. We present Binet's formulas, generating functions, Simson formulas, and the summation formulas for these sequences. Moreover, we give some identities and matrices related with these sequences.