bluuebunny/crossref_metadata_2025 huggingface dataset:
OPTIMIZATION OF IDENTIFICATION MODELING IN THE STOCHASTIC METHOD OF TAKING INTO ACCOUNT THE TERRAIN IN THE INTERPRETATION OF AEROMAGNETIZATION
Authors:   Voronezh State University, Muravina O.M. , Ponomаrenko I.A. ,   Voronezh State University
Published: October 2021

The results of studies aimed at optimizing the stochastic method of taking into account the terrain when interpreting aeromagnetic survey data are presented. The method is based on the consistent application of the method of empirical mode decomposition and the method of group accounting of arguments The results of a medium-scale aeromagnetic survey conducted in Eastern Siberia were used as actual data. It is shown that the preliminary classification of the studied territory by the nature of the relief and the magnetic field strength allows us to determine the components of the magnetic field that correlate with the relief within the selected classes. To assess the quality of correlation dependencies, the ratio of the standard deviation of the models to the variance of the magnetic field amplitudes of the analyzed frequency component were used. This allows us to compare models with different statistical characteristics of the anomalous magnetic field and divide the components into correlated and uncorrelated with the terrain. The results obtained confirm the possibility of the existence of strong correlational relationships between the magnetic field and the relief in a certain range of spatial frequencies and offer specific methodological methods for applying this stochastic approach to reducing the magnetic field in the areas of the development of platobasalts.
APPLICATION OF THE METHOD OF GROUP ACCOUNTING OF ARGUMENTS FOR THE ANALYSIS OF PETROPHYSICAL DATA
Authors:   Voronezh State University, Voronezh, Russia, Muravina O.M. , Ponomarenko I.A. ,   Voronezh State University, Voronezh, Russia, Mints M.V. ,   Geological Institute RAS
Published: October 2021

The paper considers a range of tasks related to the processing and analysis of petrophysical data, which are effectively solved by the method of group accounting of arguments (MGUA). MGUA is a machine learning method that is an alternative to regression analysis and neural network modeling. The method was tested when working with information from the petrophysical database of crystalline and sedimentary rocks of the Voronezh Crystal Massif (VCM). The basis of the analysis technology is the formation of complex identification equations that allow you to generalize, analyze and effectively use petrophysical data. Previously, the use of such equations for estimating the ore content of nickel-bearing intrusions of the mamonsky complex was considered. Examples of solving problems of robust estimation and identification of petrophysical data are provided. It is shown that the identification models of the MGUA allow automating the procedure for detecting outliers in the data, assess the belonging of rocks to a certain material complex. Since petrophysical information is a necessary link in the geological interpretation of geophysical observations, the experience of obtaining complex models linking the density of metamorphic and intrusive rocks of the VCM with electrical resistivity and magnetic susceptibility is interesting.
Editor’s Note: “If you build it, they will come.”
Authors: Sellnow Deanna
Published: October 2021

Editor’s Note to Volume 4 of the Journal of Communication Pedagogy
Training and Development: Communication and the Multigenerational Workplace
Authors:   University of Central Florida, Strawser Michael
Published: October 2021

Communication practitioners, especially those who facilitate training and development workshops, should focus on generational differences as a subset of their communication training efforts. This article positions the multigenerational workplace and generational differences as a relevant topic for communication trainers and provides cursory information related to different generations. Ultimately, 10 best practices to address generational differences in business contexts are discussed.
COVİD-19 PANDEMİSİ SONRASI KONUT İÇ MEKAN VE PEYZAJ TASARIMINDA ULRİCH’İN DESTEKLEYİCİ TASARIM TEORİSİ YAKLAŞIMI
Authors: CETİN Cigdem , Ç. KARAFAKI Filiz
Published: October 2021

Tasarım ihtiyaçlarla estetiğin doğru şekilde birleştirilmesi üzerine geliştirilmiş bir hipotezdir. Tasarım mekanda yaşanabilecek sorunları henüz ortaya çıkmadan ortaya koyup çözmeyi amaçlar. Bu noktada hem ihtiyaçların hem de mekanda zamanla gerekecek değişiklikler için alınacak tasarım kararlarının doğru tespiti önemlidir. Mekan kullanım değişikliğini ve yeni tasarım kararlarını gerektirecek sebepler çok çeşitlidir. Mekan kullanımı ihtiyacındaki, kullanıcı sayısındaki, kullanım süresindeki değişiklikler gibi değişikliklerin yanında mekanın içinde bulunduğu çevresel değişiklikler de mekan tasarımını etkilemektedir. 2019 yılının sonunda ortaya çıkan ve tüm dünyayı etkisi altına alan COVİD-19 pandemisi küresel bir afet olarak mekanların kullanımı üzerinde etkili olan ciddi bir değişiklik sebebidir. Çünkü yaşanan pandemi sonrası insanların günlük ihtiyaçları ve yaşam şekilleri değişmiş ve elbette ki bu değişiklikler yaşam mekanları olan konutlarına da yansımıştır. İnsanların mümkün olduğunca günlerini konutlarında geçirmek zorunda kalmaları konutların yaşama, çalışma, eğitim alma, eğlenme, dinlenme gibi faaliyetlerin hepsini gerçekleştirebilecekleri mekanlar olarak yeniden tasarlanmasını gerektirmiştir.
Bu çalışmanın amacı sırasıyla COVİD-19 salgını sonrası konut iç mekan ve konuta ait peyzaj alanında değişen mekansal ihtiyaçları ortaya koymak ve geliştirilecek tasarım yaklaşımlarıyla bu ihtiyaçların karşılanabileceğini ve kullanıcının fiziksel, psikolojik ve sosyal bağlamda iyi olma halinin pekiştirilebileceğini belirtmektir. Bu amaçla çalışmada Ulrich’in Destekleyici Tasarım Teorisi’nin bileşenleri irdelenmiş ve COVİD-19 pandemisi sonrası değişen mekan ihtiyaçlarına göre teorinin bu alanlara uyarlanması sağlanmıştır. Bu çalışma ile iyi olma kavramının irdelenmesi, bu amaca yönelik insan gereksinimlerini dikkate alarak somut öneriler sunulması ve gelecekteki benzer çalışmalara önderlik edilmesi amaçlanmıştır. Ayrıca bu çalışma, iç mekan ve peyzaj tasarımının ayrılmaz bir parçası olarak değişimin ve değişime ayak uydurmanın gerekliliğine ışık tutmayı hedeflemektedir.
İlk Adım Türkçeyi Yabancı Dil Olarak Öğrenen Yetişkinler İçin Türkçe-Arapça Çift Alfabeli İlk Okuma-Yazma Kitabı’nın İncelemesi Ed. Prof. Dr. G. Leyla Uzun, Hazırlayanlar: Halil Çağlar, Yeliz Rençber, Ebru Can, Ankara: Ankara Üniversitesi Basımevi
Authors: GÜNDÜZ Fikriye
Published: October 2021

Günümüzde yabancı bir dil bilmenin öğreniciler için gerek eğitim gerekse de iş dünyasında pek çok faydası vardır. Değişen hayat şartları, yabancı dil bilmeyi gerekli kılmıştır. Yabancı dil öğrenirken hedef dil ve ana dili arasındaki benzerlikler öğrenicilerin öğrenme isteğini artırmakta, hedef dilin öğrenimini ve öğretimini kolaylaştırmaktadır. Hedef dille ana dili arasında bazı farklılıkların olması olağandır ancak hedef dil ve ana dili arasında alfabe farklılığı da varsa öğrenicilerin hedef dili öğrenmesi diğer öğrenicilere göre zaman almaktadır. Yabancı dil olarak Türkçe öğrenirken öğrenicilerin yaşadığı sıkıntılardan biri alfabe farklılığından kaynaklanan okuma ve yazma sorunlarıdır. Ankara Üniversitesi TÖMER’deki öğretim görevlileri tarafından hazırlanmış olan “İlk Adım Türkçeyi Yabancı Dil Olarak Öğrenen Yetişkinler İçin Türkçe-Arapça Çift Alfabeli İlk Okuma-Yazma Kitabı” öğrenicilerin öncelikli olarak okuma yazma sorunlarını çözebilmek amacıyla hazırlanmıştır. Bu çalışmada, “İlk Adım Türkçeyi Yabancı Dil Olarak Öğrenen Yetişkinler İçin Türkçe-Arapça Çift Alfabeli İlk Okuma-Yazma Kitabı” incelenerek tanıtılmıştır. Çalışmada nitel araştırma yöntemlerinden doküman analizi tekniği kullanılmıştır. Çalışmada tanıtılan kitap Suriyeli öğrenicilerin Türkçe öğrenme ihtiyacına yönelik olarak hazırlanmıştır. Kitabın öncelikli amacı Suriyeli öğrenicilerin okuma ve yazma becerilerini geliştirmektir. Ancak kitapta dört temel dil becerisini geliştirmeyi amaçlayan etkinlikler de yer almaktadır. Kitabın CEFR (2020)’de yer alan A1 öncesi ve A1 seviyelerindeki kazanımlarla uyumlu olarak hazırlanmış olduğu, görsellerle desteklendiği, Türkçe ve Arapça iki dilli olarak hazırlandığı tespit edilmiştir.
FEN BİLGİSİ ÖĞRETMEN ADAYLARININ “İSTATİSTİK” VE “PARAMETRE” KAVRAMLARINA YÖNELİK ALGILARI
Authors: YAŞAR Mehmet Diyaddin
Published: October 2021

Bu çalışmada, fen bilgisi öğretmen adaylarının, istatistik ve parametre kavramlarına yönelik metaforik algıları ve kavramsal anlamalarının araştırılması amaçlanmıştır. Çalışma, nitel araştırma desenlerinden olgu bilim çalışması ile yürütülmüştür. Çalışma 38 fen bilgisi öğretmeni adayı ile gerçekleştirilmiştir. Araştırmada veri toplama aracı olarak metafor formu ve iki açık uçlu sorudan oluşan bir form kullanılmıştır. Elde edilen verilerin, nitel veri analizi çeşidi olan içerik analizi yapılmıştır. Bu araştırmada elde edilen verilerin güvenirlik katsayısı % 89.47 olarak hesaplanmış ve araştırma sonuçlarının güvenilir olduğu görülmüştür. Araştırmadan elde edilen bulgulara göre öğretmen adaylarının istatistik ve parametre kavramına yönelik metaforlarının değişiklik arz ettiği görülmüştür. Ayrıca, fen bilgisi öğretmen adaylarının istatistik (f=6; % 15.79) ve parametre (f= 14; % 36.84) kavramlarını doğru algılamalarının düşük olduğu sonucuna varılmıştır. Fen bilgisi öğretmen adaylarının istatistik kavramını algılama ile kabul edilebilir metaforik algılarının birbirine paralel olduğu yani her ikisinin de düşük oranda olduğu görülmüştür. Aksine öğretmen adaylarının parametre kavramını algılamalarının düşük olmasına rağmen kabul edilebilir metaforik algılamalarının daha yüksek oranda olduğu sonucuna varılmıştır. Araştırmanın sonuçlarına dayalı olarak fen bilgisi öğretmen adaylarına teorikte ve pratik uygulamalarında kavram yanılgıları içermeyen istatistik ve parametre kavramlarının öğretiminin önemli olduğu görülmüştür. Ayrıca, ülkemizde fen bilgisi öğretmen adaylarının istatistik ve parametre kavramlarına yönelik metaforlarını ve kavramsal öğrenmelerini ortaya koyan bir çalışmaya rastlanmadığı ve böylece alanda yapılacak olan diğer çalışmalara da kaynaklık edeceği düşünülmektedir.
Minimally Invasive Surgical Approach for Esophageal Adenocarcinoma in a Patient with Previous Belsey Mark IV Fundoplication: A Case Report
Authors: Kumar Sacheen , Goburdhun R , Corbett M Likos , Patel P H , Groves C , Chow J , Young A M , Uren S , Chaudry MA , Kumar Sacheen
Published: October 2021

Background: Historically, the management for recurrent or persistent Gastro-esophageal reflux disease included selective vagotomy and fundoplication. Despite these surgical interventions, the risk of Barrett’s esophagus (BE) and subsequent malignant transformation remains, requiring cancer resection surgery. We present a case of a patient with a gastro-esophageal junction (GEJ) adenocarcinoma, who underwent a pediatric thoracotomy and Belsey Mark IV fundoplication, and was successfully treated by Laparoscopic Ivor-Lewis Esophagectomy (LILE).
Case Presentation: This 64-year-old gentleman with BE and GEJ adenocarcinoma was previously deemed unsuitable for curative surgery due to clinical staging indicating a tumor length of 10cm and suspected invasion of the left pleura. Further staging by Endoscopic ultrasound indicated no evidence of pleural invasion with the distal esophageal thickening in keeping with his previous Belsey Mark IV fundoplication. He underwent neo-adjuvant chemotherapy and a subsequent LILE with complete laparoscopic reversion of the gastric fundoplication without injury to the gastroepiploic artery or fundus. There was sufficient preservation of conduit length to enable a tension free hand-sewn anastomosis with an uneventful post-operative recovery. Final histopathology confirmed ypT1 ypN0 moderately differentiated adenocarcinoma with R0 resection margins. The patient has completed 24 months of cancer recurrence free surveillance.
Conclusion: We describe the successful management of a patient by LILE on a background of previous hiatal fundoplication surgery, previously refused curative surgery. We highlight the importance of EUS as a staging modality for such cases showing invasive disease to increase the final clinical staging accuracy. We suggest a minimally invasive approach may be utilized for successful re-do hiatal dissection as an alternative to a conventional open surgery.
On Discrete Solutions for Elliptic Pseudo-Differential Equations
Authors:   Belgorod State National Research University, Tarasova O.A. , Vasilyev A.V. ,   OOO “Severgrup”, Vasilyev V.B. ,   Belgorod State National Research University
Published: October 2021

We consider discrete analogue for simplest boundary value problem for elliptic pseudo-differential equation in a half-space with Dirichlet boundary condition in Sobolev–Slobodetskii spaces. Based on the theory of discrete boundary value problems for elliptic pseudo-differential equations we give a comparison between discrete and continuous solutions for certain model boundary value problem.
A RESPONSABILIDADE SOCIAL DA UNIVERSIDADE NO CONTEXTO ATUAL
Authors: Nogaro Arnaldo , Sudbrack Edite Maria , Scheid Neusa Maria John , Cesaro Nestor Henrique de
Published: October 2021

O artigo resulta de pesquisa teórica e documental, de natureza qualitativa, realizada na literatura e em documentos, normas e legislações atinentes à extensão universitária. Tem como objetivo refletir sobre o lugar, contribuições e desafios da extensão na vida acadêmica e problematizar aspectos relacionados à sua curricularização em consonância com a responsabilidade social da universidade. A Constituição (1988), LDB 93.94/96, PNE (2014), Resolução n. 7 (Diretrizes para a Extensão na Educação Superior Brasileira), dão amparo legal e definem as diretrizes que devem orientar as práticas extensionistas das universidades brasileiras. Com isso surge o desafio de implementação e fortalecimento da extensão nos espaços acadêmicos como pilar para a formação dos estudantes, como veículo de disseminação e divulgação de conhecimento científico e oportunidade de concretização da responsabilidade social das universidades. Dentro deste cenário, a URI, como instituição comunitária, sente-se provocada e desafiada a cumprir sua missão de intervir e gerar inovação, desenvolvimento e qualidade de vida às pessoas que com ela interagirem.
Menedzsmentkontroll módszerek a kreatív szektorban
Authors: Németh Krisztina
Published: October 2021

A tanulmány célja egyrészt szakirodalmi összefoglalást adni a kreatív ágazatban működő cégek menedzsmentkontroll-megközelítéseire vonatkozóan, másrészt kérdőíves felmérés (N = 283) segítségével megvizsgálni a hazai kreatív szektorban alkalmazott stratégiai és operatív controlling módszereket, a döntéstámogatás szervezeti kereteit, jellemzőit. A cikk az alapfogalmak lehatárolását követően bemutatja a kutatás módszertanát és ismerteti a kutatás során tapasztalt összefüggéseket. A kérdőíves felmérést két kutatási kérdés vezérelte: (1) Melyek a kreatív ágazatban működő vállalatok vezetési és irányítási sajátosságai? (2) Melyek a termelési és szolgáltatási szektor azon bevált stratégiai és operatív controlling módszerei, amelyek alkalmazhatók a kreatív szektorban?
Detecting and Preventing Dehydration in Alzheimer's Patients: Multidisciplinary Approaches to Dementia Care
Authors: Oison Melina
Published: October 2021

Abnormalities of water homeostasis can be early expressions of neuronal dysfunction, brain atrophy, chronic cerebrovasculopathy and neurodegenerative disease. The aim of this study was to analyze the serum osmolality of subjects with cognitive impairment.The hydromolecular hypothesis intends to explain the relationship between dehydration and cognitive impairment in older patients as the result of protein misfolding and aggregation, in the presence of a low interstitial fluid volume, which is a defect of the microcirculation. Defective proteins were shown to impair the amount of information in brain biomolecular mechanisms, with consequent neuronal and synaptic damage.
PARTICLE MOTION ON THE SPHERICAL SEGMENT WITH VERTICALS RADIALLY INSTALLED BLADES
Authors:   National University of Life and Environmental Sciences of Ukraine, Volina T. , Pylypaka S. ,   National University of Life and Environmental Sciences of Ukraine, Nesvidomin A. ,   National University of Life and Environmental Sciences of Ukraine
Published: October 2021

The relative motion of a particle on the inner surface of a horizontal spherical disk along a vertical blade mounted in the radial direction is considered in the article. The disk rotates around a vertical axis with a given angular velocity. A system of differential equations of motion of a particle is compiled and solved by numerical methods. The kinematic characteristics of the motion are found, the regularities of the relative motion of the particle on the surface of the cylinder are clarified. Graphs characterizing the motion of a particle at certain given parameters are constructed, namely: graph of angle change, which sets the position of the particle on the surface of the sphere in the direction of the meridian, graphs of absolute and relative velocities, graphs of change of forces of the reaction of the spherical disk and blade. Numerical integration of the obtained differential equation showed that in half a second the particle rises to the height of the hemisphere, and then begins to fall. In this case, the descent alternates with the rise to a complete stop of the particle at a certain height, i.e. the particle “sticks” and then rotates with the hemisphere. The angle of “sticking” can be found analytically. In addition, numerical calculation methods have shown that at zero value of the friction coefficient of the particle on the disk surface, i.e. at its absolutely smooth surface, and at the non-zero value of the friction coefficient of the blade surface, and at an unlimited increase of the disk angular velocity the particle “sticks” at the height of the center of the sphere. If both surfaces are absolutely smooth, then the damping oscillations of the angle that determines the position of the particle on the surface of the sphere in the direction of the meridian, occur indefinitely. The working surface of the disk of the centrifugal apparatus, which is made in the form of a spherical segment, provides the beginning of the flight of the particle at the time of ascent from the disk at a given angle to the horizontal plane, increasing the scattering area of the technological material. The analytical description of the particle motion obtained in the article makes it possible to investigate its acceleration along with the blades of the disk and to find the relative and absolute velocities at the moment of particle ascent from the disk. The found analytical dependencies allow determining the influence of constructive and technological parameters on the process of particle acceleration.
STRUCTURED SYSTEMS OF FACTORS AND EXPERIMENTAL-STATISTICAL MODELS IN STUDIES OF BUILDING COMPOSITES
Authors:   Odessa State Academy of Civil Engineering and Architecture, Lyashenko T.
Published: October 2021

The introduction to the article presents the objects of research, for which the proposed approach to modelling and the types of the models are intended. These are high quality composite building materials, the multicomponent dispersed systems, with the components that could be multicomponent themselves. The need to use for their design the mathematical models of the dependences of structure parameters and properties of the material on the factors of composition and processes of production and operation is noted. Then the background of experimental-statistical (ES) models application in research and development of composite materials is considered. What they are needed for is emphasized. The peculiarities of these models are noted in contrast to the models of other classes, including the usual regression ones. The necessity of experiment design to build ES-models is also emphasized. Special types of ES-models are named, for the cases when it is necessary to consider linearly related factors ("mixtures"). The expediency of structurizing the system of all the factors under consideration and the corresponding ES-models is indicated to. The concept of a priori and a posteriori structuring of factor systems when modeling is proposed. Systems that could include subsystems of linearly related factors and subsystems of mutually independent factors separated out at the stage of a priori structuring have been called “mixtures, technologies" systems and classified by the type of factor domains. System designations are given. Special polynomial models developed for them are presented. For the analysis of modelling results, a posteriori allocation of the factor regions and the use of tools of composition-process fields methodology are proposed. The local fields of material properties in coordinates of one or another group of the factors and their transformation under the influence of the factors of another group can be analysed, using numerical generalizing indices of the local fields and the secondary models for these indices. The path from obtaining data of designed natural experiment for building the primary ES-models to the secondary models, for generalizing indices, based on the results of computational experiment, is schematically shown.
Устойчивость к антибиотикам и способность к образованию биопленок золотистого стафилококка, выделенного из молока коров Костанайской области РК
Authors: Рыщанова Р. М. , Мендыбаева А. М. , Муканов Г. Б. , Шевченко П. В. , Бермухаметов Ж. Ж.
Published: October 2021

Цель работы заключается в изучении распространенности штаммов Staphylococcus aureus, резистентных к противомикробным препаратам, выделенных от коров с субклинической формой мастита в хозяйствах Костанайской области, и способности их к биопленкообразованию. Полученные данные позволят судить о степени и масштабах антибиотикорезистентности Staphylococcus aureus, вызывающих инвазивные инфекции на локальном и региональном уровнях, что, в свою очередь, необходимо для эпидемиологического надзора и успешного лечения животных. Нами впервые в Северном регионе Казахстана изучен спектр антибиотикорезистентности штаммов S. aureus, ассоциированных с субклиническими формами маститов у высокопродуктивых молочных коров и исследована способность микроорганизмов к образованию биоплёнок.
Composite Flap - Serratus Anterior with Rib Component – a Foot Salvage Solution after a Severe Crush Injury
Authors:   Department of Plastic Surgery, „Sf. Ioan” Emergency Clinical Hospital, Bucharest Romania, ANDREI Marin , GIUGLEA Carmen ,   „Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, MARINESCU Silviu ,   „Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, MIHAI Ruxandra ,   Department of Plastic Surgery, „Bagdasar Arseni” Emergency Clinical Hospital, Bucharest, Romania
Published: October 2021

Severe work accidents are one of the most frequent causes for physical disability in adults, alongside car accidents and war/gunshot injuries. In this article we present the case of a severe crush injury of the left foot that occurred in a 31 year-old patient who was involved in a work accident. After an unsuccessful tissue coverage using local flaps, the salvage solution was that of a composite free flap, aiming not only to cover, but also to restore stability to the foot. The treatment of choice was the serratus anterior muscle harvested together with osseous component (8th rib). The healing was difficult, due to wound dehiscence with bone exposure over a small area, but the problem was addressed using FGF (fibroblast growth factor) sponges, which enabled granulation and complete wound closure. The outcome of the case was favourable, gait being possible without any deficiency. For the cosmetic and functional reasons, the patient suffered one last surgical procedure to debulk the dorsal aspect of the foot. The final result was more than satisfactory, the patient being totally rehabilitated and socially and professionally reintegrated.
Design and Development of a Novel Fixturing Solution for Handling Complex Shaped Components
Authors:   University of Moratuwa, Sri Lanka, Dharmathilaka S.P.I.E. , Devasurendra lkS.N. , Chathuranga lkP.K. ,   University of Moratuwa, Sri Lanka, Kulasekera A.L. ,   University of Moratuwa, Sri Lanka, Jayaweera N.D. ,   University of Moratuwa, Sri Lanka
Published: October 2021

Fixturing is one of the key subprocesses used in many industries such as aerospace, automobile and marine engineering. Most existing fixturing systems use pin-type end effectors which apply concentrated loads (See Fig. 1. (Left)) on objects resulting in geometrical distortions [1]. Granular jamming is a novel fixturing technique used in the field of soft robotics [3]. We propose the use of granular jamming for developing a fixturing system which minimizes the structural deformation and surface damage prevalent in pin type fixturing.
Treatment of ruptured aneurysms of the choroidal collateral system in moyamoya disease: a systematic review and data analysis
Authors: Wiedmann Markus K. H. , Davidoff Chris , Lo Presti Anna , Ni Wei , Rhim Jong Kook , Simons Mary , Stoodley Marcus A.
Published: October 2021

OBJECTIVE

Moyamoya disease (MMD) is a chronic, progressive steno-occlusive condition of the distal internal carotid arteries of unknown etiology. Collateral arterial networks typically develop in MMD, bypassing the steno-occlusion. Aneurysms arising on the collateral networks are a known source of hemorrhage. The choroidal collateral system is the most common location for collateral pathway aneurysms in MMD and associated hemorrhage. The authors performed data collection and analysis to further elucidate the best treatment approaches for ruptured aneurysms of the choroidal collateral system in MMD, which as yet remain unclear.

METHODS

A comprehensive data collection and analysis of case reports and case series with ruptured choroidal collateral artery aneurysms (CCAAs) was performed. PRISMA guidelines for systematic reviews were followed and the Medline, Embase, and Scopus databases were searched for relevant studies. A database was created including patients with ruptured CCAA in MMD. Original data from case series were included whenever possible. A previously unreported case of a ruptured choroidal artery aneurysm in MMD treated by the authors was also included.

RESULTS

The database comprised 72 patients with ruptured CCAA in MMD. The most common clinical symptoms were headache, nausea, and vomiting (39%). Initially, a conservative treatment approach was chosen in 29% of cases but led to rehemorrhage in 40% of cases; 63% of these rehemorrhages occurred during the first 35 days. Endovascular treatment seemed a safe option for aneurysm exclusion, mainly through parent vessel sacrifice, but had a treatment failure rate of 21%, due to inadequate access. Aneurysm treatment with revascularization as the initial treatment strategy led to aneurysm regression in 82% with no reported rehemorrhage. Aneurysm exclusion through open surgery was effective but was associated with a relatively high complication rate (25%). Outcome after rupture of CCAA was poor, with 41% of patients deceased or permanently disabled. Overall, patient outcomes were better in the endovascular and revascularization treatment group than in the conservative treatment group.

CONCLUSIONS

Rupture of CCAA in MMD is associated with high morbidity and rerupture rate requiring urgent treatment.
Posterior petrous face meningiomas presenting with Ménière’s-like syndrome: a case series and review of the literature
Authors: Morshed Ramin A. , Jiam Nicole T. , Wang Elaina J. , Magill Stephen T. , Knoll Renata M. , Kozin Elliott D. , Theodosopoulos Philip V. , Cheung Steven W. , Sharon Jeffrey D. , McDermott Michael W.
Published: October 2021

OBJECTIVE

Ménière’s disease is an inner ear disorder classically characterized by fluctuating hearing loss, tinnitus, and aural fullness accompanied by episodic vertigo. While the pathogenesis of Ménière’s remains under debate, histopathological analyses implicate endolymphatic sac dysfunction with inner ear fluid homeostatic dysregulation. Little is known about whether external impingement of the endolymphatic sac by tumors may present with Ménière’s-like symptoms. The authors present a case series of 7 patients with posterior fossa meningiomas that involved the endolymphatic sac and new onset of Ménière’s-like symptoms and review the literature on this rare clinical entity.

METHODS

A retrospective review of patients undergoing resection of a posterior petrous meningioma was performed at the authors’ institution. Inclusion criteria were age older than 18 years; patients presenting with Ménière’s-like symptoms, including episodic vertigo, aural fullness, tinnitus, and/or hearing loss; and tumor location overlying the endolymphatic sac.

RESULTS

There were 7 cases of posterior petrous face meningiomas involving the vestibular aperture presenting with Ménière’s-like symptoms. Imaging and intraoperative examination confirmed no cranial nerve VIII compression or labyrinthine artery involvement accounting for audiovestibular symptoms. Of the 7 patients in the series, 6 experienced significant improvement or resolution of their vertigo, and all 7 had improvement or resolution of their tinnitus after resection. Of the 5 patients who had preoperative hearing loss, 2 experienced improvement or resolution of their ipsilateral preoperative hearing deficit, whereas the other 3 had unchanged hearing loss compared to preoperative evaluation.

CONCLUSIONS

Petrous face meningiomas overlying the endolymphatic sac can present with a Ménière’s syndrome. Early recognition and microsurgical excision of these tumors is critical for resolution of most symptoms and stabilization of hearing loss.
Surgical treatment of brainstem cavernous malformations: an international Delphi consensus
Authors: Dammann Philipp , Abla Adib A. , Al-Shahi Salman Rustam , Andrade-Barazarte Hugo , Benes Vladimir , Cenzato Marco , Connolly E. Sander , Cornelius Jan F. , Couldwell William T. , Sola Rafael G. , Gomez-Paz Santiago , Hauck Erik , Hernesniemi Juha , Kivelev Juri , Lanzino Giuseppe , Macdonald R. Loch , Morcos Jacques J. , Ogilvy Christopher S. , Steiger Hans-Jakob , Steinberg Gary K. , Santos Alejandro N. , Rauschenbach Laurèl , Darkwah Oppong Marvin , Schmidt Börge , Spetzler Robert F. , Schaller Karl , Lawton Michael T. , Sure Ulrich
Published: October 2021

OBJECTIVE

Indication for surgery in brainstem cavernous malformations (BSCMs) is based on many case series, few comparative studies, and no randomized controlled trials. The objective of this study was to seek consensus about surgical management aspects of BSCM.

METHODS

A total of 29 experts were invited to participate in a multistep Delphi consensus process on the surgical treatment of BSCM.

RESULTS

Twenty-two (76%) of 29 experts participated in the consensus. Qualitative analysis (content analysis) of an initial open-ended question survey resulted in 99 statements regarding surgical treatment of BSCM. By using a multistep survey with 100% participation in each round, consensus was reached on 52 (53%) of 99 statements. These were grouped into 4 categories: 1) definitions and reporting standards (7/14, 50%); 2) general and patient-related aspects (11/16, 69%); 3) anatomical-, timing of surgery–, and BSCM-related aspects (22/37, 59%); and 4) clinical situation–based decision-making (12/32, 38%). Among other things, a consensus was reached for surgical timing, handling of associated developmental venous anomalies, handling of postoperative BSCM remnants, assessment of specific anatomical BSCM localizations, and treatment decisions in typical clinical BSCM scenarios.

CONCLUSIONS

A summary of typical clinical scenarios and a catalog of various BSCM- and patient-related aspects that influence the surgical treatment decision have been defined, rated, and interpreted.
Radiomic modeling to predict risk of vertebral compression fracture after stereotactic body radiation therapy for spinal metastases
Authors: Gui Chengcheng , Chen Xuguang , Sheikh Khadija , Mathews Liza , Lo Sheng-Fu L. , Lee Junghoon , Khan Majid A. , Sciubba Daniel M. , Redmond Kristin J.
Published: October 2021

OBJECTIVE

In the treatment of spinal metastases with stereotactic body radiation therapy (SBRT), vertebral compression fracture (VCF) is a common and potentially morbid complication. Better methods to identify patients at high risk of radiation-induced VCF are needed to evaluate prophylactic measures. Radiomic features from pretreatment imaging may be employed to more accurately predict VCF. The objective of this study was to develop and evaluate a machine learning model based on clinical characteristics and radiomic features from pretreatment imaging to predict the risk of VCF after SBRT for spinal metastases.

METHODS

Vertebral levels C2 through L5 containing metastases treated with SBRT were included if they were naive to prior surgery or radiation therapy, target delineation was based on consensus guidelines, and 1-year follow-up data were available. Clinical features, including characteristics of the patient, disease, and treatment, were obtained from chart review. Radiomic features were extracted from the planning target volume (PTV) on pretreatment CT and T1-weighted MRI. Clinical and radiomic features selected by least absolute shrinkage and selection operator (LASSO) regression were included in random forest classification models, which were trained to predict VCF within 1 year after SBRT. Model performance was assessed with leave-one-out cross-validation.

RESULTS

Within 1 year after SBRT, 15 of 95 vertebral levels included in the analysis demonstrated new or progressive VCF. Selected clinical features included BMI, performance status, total prescription dose, dose to 99% of the PTV, lumbar location, and 2 components of the Spine Instability Neoplastic Score (SINS): lytic tumor character and spinal misalignment. Selected radiomic features included 5 features from CT and 3 features from MRI. The best-performing classification model, derived from a combination of selected clinical and radiomic features, demonstrated a sensitivity of 0.844, specificity of 0.800, and area under the receiver operating characteristic (ROC) curve (AUC) of 0.878. This model was significantly more accurate than alternative models derived from only selected clinical features (AUC = 0.795, p = 0.048) or only components of the SINS (AUC = 0.579, p < 0.0001).

CONCLUSIONS

In the treatment of spinal metastases with SBRT, a machine learning model incorporating both clinical features and radiomic features from pretreatment imaging predicted VCF at 1 year after SBRT with excellent sensitivity and specificity, outperforming models developed from clinical features or components of the SINS alone. If validated, these findings may allow more judicious selection of patients for prophylactic interventions.
Association of Medicaid expansion under the Affordable Care Act with access to elective spine surgical care
Authors: Greenberg Jacob K. , Brown Derek S. , Olsen Margaret A. , Ray Wilson Z.
Published: October 2021

OBJECTIVE

The Affordable Care Act expanded Medicaid eligibility in many states, improving access to some forms of elective healthcare in the United States. Whether this effort increased access to elective spine surgical care is unknown. This study’s objective was to evaluate the impact of Medicaid expansion under the Affordable Care Act on the volume and payer mix of elective spine surgery in the United States.

METHODS

This study evaluated elective spine surgical procedures performed from 2011 to 2016 and included in the all-payer State Inpatient Databases of 10 states that expanded Medicaid access in 2014, as well as 4 states that did not expand Medicaid access. Adult patients aged 18–64 years who underwent elective spine surgery were included. The authors used a quasi-experimental difference-in-difference design to evaluate the impact of Medicaid expansion on hospital procedure volume and payer mix, independent of time-dependent trends. Subgroup analysis was conducted that stratified results according to cervical fusion, thoracolumbar fusion, and noninstrumented surgery.

RESULTS

The authors identified 218,648 surgical procedures performed in 10 Medicaid expansion states and 118,693 procedures performed in 4 nonexpansion states. Medicaid expansion was associated with a 17% (95% CI 2%–35%, p = 0.03) increase in mean hospital spine surgical volume and a 23% (95% CI −0.3% to 52%, p = 0.054) increase in Medicaid volume. Privately insured surgical volumes did not change significantly (incidence rate ratio 1.13, 95% CI −5% to 34%, p = 0.18). The increase in Medicaid volume led to a shift in payer mix, with the proportion of Medicaid patients increasing by 6.0 percentage points (95% CI 4.1–7.0, p < 0.001) and the proportion of private payers decreasing by 6.7 percentage points (95% CI 4.5–8.8, p < 0.001). Although the magnitude of effects varied, these trends were similar across procedure subgroups.

CONCLUSIONS

Medicaid expansion under the Affordable Care Act was associated with an economically and statistically significant increase in spine surgery volume and the proportion of surgical patients with Medicaid insurance, indicating improved access to care.
Evaluating stability of the craniovertebral junction after unilateral C1 lateral mass resection: implications for the direct lateral approach
Authors: Soni Pranay , Loss Jeremy G. , Gillespie Callan M. , Colbrunn Robb W. , Schlenk Richard , Steinmetz Michael P. , Recinos Pablo F. , Benzel Edward C. , Kshettry Varun R.
Published: October 2021

OBJECTIVE

The direct lateral approach is an alternative to the transoral or endonasal approaches to ventral epidural lesions at the lower craniocervical junction. In this study, the authors performed, to their knowledge, the first in vitro biomechanical evaluation of the craniovertebral junction after sequential unilateral C1 lateral mass resection. The authors hypothesized that partial resection of the lateral mass would not result in a significant increase in range of motion (ROM) and may not require internal stabilization.

METHODS

The authors performed multidirectional in vitro ROM testing using a robotic spine testing system on 8 fresh cadaveric specimens. We evaluated ROM in 3 primary movements (axial rotation [AR], flexion/extension [FE], and lateral bending [LB]) and 4 coupled movements (AR+E, AR+F, LB + left AR, and LB + right AR). Testing was performed in the intact state, after C1 hemilaminectomy, and after sequential 25%, 50%, 75%, and 100% C1 lateral mass resection.

RESULTS

There were no significant increases in occipital bone (Oc)–C1, C1–2, or Oc–C2 ROM after C1 hemilaminectomy and 25% lateral mass resection. After 50% resection, Oc–C1 AR ROM increased by 54.4% (p = 0.002), Oc LB ROM increased by 47.8% (p = 0.010), and Oc–C1 AR+E ROM increased by 65.8% (p < 0.001). Oc–C2 FE ROM increased by 7.2% (p = 0.016) after 50% resection; 75% and 100% lateral mass resection resulted in further increases in ROM.

CONCLUSIONS

In this cadaveric biomechanical study, the authors found that unilateral C1 hemilaminectomy and 25% resection of the C1 lateral mass did not result in significant biomechanical instability at the occipitocervical junction, and 50% resection led to significant increases in Oc–C2 ROM. This is the first biomechanical study of lateral mass resection, and future studies can serve to validate these findings.
Some legal issues on compensation for environmental damage under Vietnamese law and the law of the European Union
Authors: Thiet Tran Cong , Duyen Thuy Vu Thi
Published: October 2021

In recent years, the law on environmental damage compensation has been a burning issue in many countries around the world, especially in developing nations where the dilemma concerns the balance between economic development and environmental protection. The issue of liability for environmental damage can be considered from many perspectives, and the focus of this study will be civil liability compensation. Learning and studying the regulations of developed countries like the European Union plays an important role in the development and improvement of environmental laws in general and the law on environmental compensation in particular for Vietnam. In this article, the authors provide insights on some legal provisions on compensation for environmental damage based on comparison with the laws of the European Union to determine how to develop legal regulations in the field of environmental damage compensation. This creates a foundation that contributes to the introduction of solutions to improve the efficiency of the law on environmental damage compensation in Vietnam.
Spór o opodatkowanie kolei linowych i wyciągów narciarskich. Uwagi na tle wyroku NSA z 9 lipca 2019 r. , II FSK 2693/17
Authors: Pahl Bogumił
Published: October 2021

Tematyka opodatkowania podatkiem od nieruchomości infrastruktury narciarskiej wywołuje na etapie stosowania przepisów ustawy o podatkach i opłatach lokalnych liczne wątpliwości interpretacyjne. Spowodowane jest to brakiem jednoznacznej definicji pojęcia „budowla” na potrzeby opodatkowania podatkiem od nieruchomości. Obowiązująca od 2003 r. legalna definicja tego terminu ma charakter odsyłający. W ustawie podatkowej nie zdecydowano się wymienić obiektów uznanych za budowle lecz zawarto odesłanie do przepisów prawa budowlanego. Te z kolei zaś w wielu przypadkach są nieprecyzyjne. W efekcie prowadzi to do różnych, często odmiennych rozstrzygnięć organów podatkowych oraz sądów administracyjnych. Jest to szczególnie zauważalne w przypadku obiektów budowlanych o złożonej strukturze konstrukcyjnej.
Intertextual Strategy of the Narrator of the Second Epistle of Peter in the Catalogue of Virtues (1:5-7)
Authors: Rosik Mariusz , Wojciechowska Kalina
Published: October 2021

The Second Epistle of Peter is one of the least studied texts of the New Testament. It is usually compared with 1 Peter and/or Jude and indeed shows some similarities and some differences with these texts. But little attention is paid to the originality of 2 Peter both in its interpretation of texts from the Jewish tradition and in the application of intertextual strategies to elements of Greek philosophy. 2 Pet 1:5-7 is undoubtedly one of the most Hellenized passages of the epistle. Not only did the narrator use a hierarchical catalog of virtues popular in Greek literature, but also terms that are commonly associated with ethics, especially the stoic ethics (faith – πίστις; virtue – ἀρετή; knowledge – γνῶσις). This article aims to present the manner in which the narrator in 2 Pet 1:5-7 enters into dialogue with Greek ethical texts and how he transforms, innovates, and reinterprets these texts. In other words, what intertextual strategy he uses.
O pojęciu hellenizacji
Authors: Mrugalski Damian
Published: October 2021

Pojęcie hellenizacji odnosi się do rozprzestrzeniania się greckiej kultury i przejmowania jej przez ludy niebędące Grekami w czasach, które zapoczątkowują podboje Aleksandra Wielkiego (czyli od drugiej połowy IV w. p.n.e.). W taki lub podobny sposób termin ten zostaje zdefiniowany w wielu współczesnych słownikach i encyklopediach dotyczących starożytności. Pojęcie to stało się problematyczne, gdy w drugiej połowie XIX w. i pierwszej połowie XX w. historycy religii powiązali je z pewnego rodzaju sądami wartościującymi, a niekiedy nawet ideologicznymi. Dlatego też niektórzy współcześni uczeni proponują porzucenie pojęcia „hellenizacja” w badaniach nad antykiem bądź zastąpienie go innymi, które w sposób neutralny opisywałyby zjawiska zachodzące w epoce hellenistycznej. W niniejszym artykule przedstawiono przegląd wybranych stanowisk w odniesieniu do samego pojęcia „hellenizacja”, a także podjęto próbę odpowiedzi na pytanie, czy we współczesnych badaniach dotyczących epoki hellenistycznej można uniknąć tego obciążonego ideologicznie terminu.
The concept and legal nature of digital maturity
Authors: Polyakova Tatiana A.
Published: October 2021

The article examines the legal nature of the institute of digital maturity. Being considered the legal grounds for the introduction and use of digital maturity indicators as part of digital transformation processes. The authors analyze the definitions of digital maturity given in the current legislation and scientific literature and outline the indicators of digital maturity. Based on the analysis of legal regulation and the legal nature of the digital maturity concept, the authors define it as the result (level) of the development of a particular subject, object, institution or development direction as part of the digital transformation implementation. This result is characterized by a certain general and special set of indicators (indicators). The article proposes to formalize this definition as part of a federal law or a decree of the Government of the Russian Federation. The analysis of the legal regulation of relations connected with the digital maturity provision indicates a clear lack of methodological support for these processes, the lack of a unified approach to understanding what digital maturity is, and what general and special indicators and criteria for their assessment should be used. The article concludes that, based on the existing legislation, it is often difficult to understand what requirements exist for a certain actor to ensure the digital maturity and how it is to be achieved. The future development of the concept of digital maturity will largely be based on the practical implementation of legally fixed models. In this regard, the authors believe that an instrumental means is carrying out the experiments on the official implementation of these indicators at the level of individual subjects, thus testing it and identifying a promising model for the digital maturity development. In the current situation, there exists a need for the development of the institute by assessing the practical implementation of digital maturity as part of digital transformation processes both at the federal and regional levels in the Russian Federation.