bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANALYTICAL SUBSTANTIATION OF THE RATIONAL MODE OF VIBRATION IMPACT ON THE HONEYCOMB
Authors: ШЕМЯКИН А.В. , БОРЫЧЕВ С.Н. , КАШИРИН Д.Е. , ПАВЛОВ В.В. , КУЗНЕЦОВ А.С. 
Published: July 2021

Проблема и цель. Заключается в том, чтобы теоретически обосновать режим виброочистки воскового сырья, при котором происходит отделение частиц воска от перговых гранул. Методология. В результате вибрационного воздействия на соты с пергой действует вынуждающая сила, которая должна быть больше силы трения между перговой гранулой и восковой основой ячейки сота, для того чтобы гранулы перги отделились. Увеличить силу, действующую на гранулу, можно увеличением либо амплитуды, либо частоты колебаний. Управление частотой является более рациональным по сравнению с управлением амплитудой. Для расчета частоты и амплитуды вынуждающей силы используются следующие данные: 2h – толщина рамки с сотами, h = 0,01м; a – длина рамки с сотами, a = 0,3м; b – ширина рамки с сотами, b = 0,4м; ρ – плотность, ρ = 326 кг/м³; N – натяжение; g – ускорение свободного падения, g = 9,81 м/c²; E – модуль упругости, E = 206000 МПа; G – модуль сдвига, G = 74000 Мпа; ν – коэффициент Пуассона, ν = 0,3; υ – коэффициент вязкости. Моделирование исследуемого процесса выполняется в среде Mathcad встроенными средствами статистической обработки. При этом осуществляется математическое моделирование в определенных рамках технологического процесса. Результаты. При воздействии на рамки с сотами, в которых есть перга, гармоническими колебаниями, возникает резонанс на малых частотах, что помогает ускорять процесс очистки. Заключение. Для наиболее качественной очистки воскового сырья от примесей необходимо воздействие вибрации с частотой в диапозоне от 14 до 16 Гц. При этом возникает резонанс, который уменьшает затраты энергии на данный процесс.
Problem and purpose. The aim of the study is to theoretical justify the mode of vibration cleaning of wax feedstock, in which wax particles are separated from beads. Methodology. As a result of the vibration action, a force force is exerted on the feather honeycombs, which must be greater than the frictional force, in order for the feather pellets to separate from the wax cells of the honeycombs. To calculate the frequency and amplitude of the force, the following data 2h are used - the thickness of the frame with cells, h = 0.01m; a is the length of the frame with cells, a = 0.3m; b is the width of the frame with cells, b = 0.4m; ρ - density, ρ = 326 kg/m3 ; N - tension; g - acceleration of free fall, g = 9.81 m/c2 ; E - modulus of elasticity, E = 206000 MPa; G - shear modulus, G = 74000 MPa; v is Poisson's coefficient, v = 0.3; υ - viscosity coefficient. Results. When acting on frames with cells in which there is a feather, harmonic oscillations, resonance at low frequencies occurs, which helps to accelerate the cleaning process. Conclusion. For the highest quality purification of wax raw materials from impurities, vibration is necessary with a frequency in the diapozone from 14 to 16. At the same time, a resonance occurs that reduces the energy consumption for this process.
FORMULATION OF THE PROBLEM FOR RESEARCHING THE COMPETITION OF TWO FIRMS TAKING INTO ACCOUNT THEIR MUTUAL AWARENESS
Authors: Борисоглебская Лариса Николаевна , Данилевич Денис Владимирович , Пахолкин Евгений Васильевич , Сергеев Сергей Михайлович 
Published: July 2021

Исследование посвящено математическому моделированию ситуации конкурентного присутствия в рамках рыночной дуополии. Рассматривается ситуация чистой конкуренции и вариант взаимной осведомленности о стратегии конкурента. Результаты исследования имеют практическое значение для деятельности Инжинирингового центра технологий цифровой среды для обеспечения комплексной безопасности телекоммуникации, средств связи и энергоэффективности Орловского государственного университета им. И.С. Тургенева. Основные положения могут применяться при выборе стратегии поведения на рынке стратегически важных инновационных продуктов. Представленные в рамках данного исследования материалы и математическая модель, разработанные в соответствии с программой деятельности Инжинирингового центра, созданного на базе ОГУ им. И.С. Тургенева, по направлению технологий цифровой среды для обеспечения комплексной безопасности телекоммуникации, средств связи и энергоэффективности дают возможность осуществить прогнозный расчет экономически важных показателей и сопутствующих издержек в условиях конкурентного окружения.
The study is devoted to mathematical modeling of the situation of competitive presence within the framework of a market duopoly. The situation of pure competition and the variant of mutual awareness of the competitor's strategy is considered. The results of the study are of practical importance for the activities of the Engineering Center for Digital Environment Technologies to ensure the integrated security of telecommunications, communications and energy efficiency of the Oryol State University. I.S. Turgenev. The main provisions can be applied when choosing a strategy of behavior in the market of strategically important innovative products. The materials and mathematical model presented in the framework of this research, developed in accordance with the program of activities of the Engineering Center, created on the basis of the OSU named after I.S. Turgenev, in the direction of digital environment technologies to ensure integrated security of telecommunications, communications and energy efficiency, make it possible to carry out a predictive calculation of economically important indicators and associated costs in a competitive environment.
Discovery of 22 GHz Water Masers in the Serpens South Region
Authors: Ortiz-León Gisela N. , Plunkett Adele L. , Loinard Laurent , Dzib Sergio A. , Rodríguez-Garza Carolina B. , Pillai Thushara , Gong Yan , Brunthaler Andreas 
Published: July 2021

Abstract
Using the Karl G. Jansky Very Large Array (VLA), we have conducted a survey for 22 GHz, 61,6–52,3 H2O masers toward the Serpens South region. The masers were also observed with the Very Long Baseline Array following the VLA detections. We detect for the first time H2O masers in the Serpens South region that are found to be associated to three Class 0–Class I objects, including the two brightest protostars in the Serpens South cluster, known as CARMA-6 and CARMA-7. We also detect H2O masers associated to a source with no outflow or jet features. We suggest that this source is most probably a background asymptotic giant branch star projected in the direction of Serpens South. The spatial distribution of the emission spots suggest that the masers in the three Class 0–Class I objects emerge very close to the protostars and are likely excited in shocks driven by the interaction between a protostellar jet and the circumstellar material. Based on the comparison of the distributions of bolometric luminosity of sources hosting 22 GHz H2O masers and 162 young stellar objects covered by our observations, we identify a limit of L
Bol ≈ 10L
⊙ for a source to host water masers. However, the maser emission shows strong variability in both intensity and velocity spread, and therefore masers associated to lower-luminosity sources may have been missed by our observations. We also report 11 new sources with radio continuum emission at 22 GHz.
Network of Star Formation: Fragmentation Controlled by Scale-dependent Turbulent Pressure and Accretion onto the Massive Cores Revealed in the Cygnus-X GMC Complex
Authors: Li Guang-Xing , Cao Yue , Qiu Keping 
Published: July 2021

Abstract
Molecular clouds have complex density structures produced by processes including turbulence and gravity. We propose a triangulation-based method to dissect the density structure of a molecular cloud and study the interactions between dense cores and their environments. In our approach, a Delaunay triangulation is constructed, which consists of edges connecting these cores. Starting from this construction, we study the physical connections between neighboring dense cores and the ambient environment in a systematic fashion. We apply our method to the Cygnus-X massive GMC complex and find that the core separation is related to the mean surface density by

Σ

edge

∝

l

core

−
0.28

, which can be explained by fragmentation controlled by a scale-dependent turbulent pressure (where the pressure is a function of scale, e.g., p ∼ l
2/3). We also find that the masses of low-mass cores (

M

core

<
10

M

⊙

) are determined by fragmentation, whereas massive cores (

M

core

>
10

M

⊙

) grow mostly through accretion. The transition from fragmentation to accretion coincides with the transition from a log-normal core mass function (CMF) to a power-law CMF. By constructing surface density profiles measured along edges that connect neighboring cores, we find evidence that the massive cores have accreted a significant fraction of gas from their surroundings and thus depleted the gas reservoir. Our analysis reveals a picture where cores form through fragmentation controlled by scale-dependent turbulent pressure support, followed by accretion onto the massive cores, and the method can be applied to different regions to achieve deeper understandings in the future.
The Sunward Electron Deficit: A Telltale Sign of the Sun’s Electric Potential
Authors: Halekas J. S. , Berčič L. , Whittlesey P. , Larson D. E. , Livi R. , Berthomier M. , Kasper J. C. , Case A. W. , Stevens M. L. , Bale S. D. , MacDowall R. J. , Pulupa M. P. 
Published: July 2021

Abstract
As the Parker Solar Probe explores new regions of the inner heliosphere, it travels ever deeper into the electric potential of the Sun. In the near-Sun environment, a new feature of the electron distribution emerges, in the form of a deficit in the sunward suprathermal population. The lower boundary of this deficit forms a cutoff in phase space, at an energy determined by the electric potential drop between the observation point and the outer heliosphere. We explore the characteristics of the sunward deficit and the associated cutoff, as well as the properties of the plasma in which we observe them. The deficit occurs in ∼60%–80% of electron observations within ∼0.2 au, and even more frequently in plasma with low β, low collisional age, and a more anisotropic electron core population. At greater distances, the deficit rapidly disappears, as the suprathermal halo grows, with these two trends likely related. The cutoff energy varies linearly with the local electron core temperature, confirming a direct relationship to the ambipolar electric potential. Meanwhile, the cutoff width varies with β and collisional age, suggesting that energy diffusion plays a role in erasing the deficit. The nearly ubiquitous occurrence of the sunward deficit in the inner heliosphere suggests that we may need to reconsider the functional forms commonly used to represent electron distributions in this environment.
LEONE X E LEOPOLDO DE’ MEDICI COMMITTENTI E COLLEZIONISTI DI RAFFAELLO: TRE ESEMPI
Authors: Faietti Marzia 
Published: July 2021

Leo X and Leopoldo de ‘Medici, patrons and collectors of Raphael: three examples.
Today, the great majority of Raphael’s works in the Uffizi exist thanks to the Medici art collections of the early 1500s to the early 1670s. It is therefore possible to assert that this Florentine family had a particular taste for Raphael’s works. However, not all the paintings collected in that time reflect the Medicis’ artistic interests, as many of them came from expropriations or bequests and inheritances. Despite this, one artistic genre, more than others, appears to be particularly representative of the Medici family’s interest: the portrait. The aim of this paper is to identify some trends concerning the Medicis’ taste in the portrait and self-portrait. In doing so, three artworks – preserved in the Gallerie degli Uffizi – will be examined here: the Portrait of Leo X with Cardinals Giulio de ‘Medici and Luigi de’ Rossi; the Portrait of Tommaso Inghirami, known as Fedra; and Raphael’s self-portrait. These examples show how the artistic execution of Raphael’s artworks, or their later inclusion in the Medici collection (following Raphael’s death), depended on two main Medici personalities, namely Leo X and the prince and cardinal Leopoldo. Moreover, such portraits also reflect the three main recurrent circumstances under which works would usually be included in the Medici collection. The first concerned the creation of the artwork through a direct relationship between patron and artist (and, here, reciprocal incentives from one to the other can be seen). The second had to do with a consolidated taste of the Medicis in creating a collection of artistic portraits and, here, the acquisition of the artwork perfectly reflects this artistic taste. In the third case, we will see how the desire for a complete collection of artistic self-portraits sometimes brought the collector to acquire artworks that did not exactly correspond to their tastes.
Medieval Biography Between the Individual and the Collective
Authors: Mlinar Janez 
Published: July 2021

The treatise focuses on a diachronic demonstration of the development of biographical texts in the Middle Ages, pointing to individuals’ role within these texts. This allows for a definition of content-related value of medieval biographies and their interpretative range.
Medieval biographical texts built upon ancient materials only in part. In the early Middle Ages hagiographies and, to some extent, gestae gained prominence; however, they focused on the collective, not the individual. Collective values and goals were thus projected on to a literary character. The so-called twelfth-century Renaissance presents itself as a key moment in the shift of paradigm. Broader social changes also brought about a new perception of the individual. Having previously been reduced to types, individuals began to acquire particular traits. A shift in the perception of an individual gave new impetus to biographical texts in the late Middle Ages. The quantity of such texts increased considerably, the circle of their authors expanded and was no longer restricted to the clergy, and their target audience was differentiated as well. Gradually, vernacular languages took root and the forms of texts became more diverse.
Nevertheless, the internal structure of a medieval individual remains concealed due to the quantity and structure of sources and, consequently, methodological issues. On the other hand, it is for these reasons that medieval biographies provide an insight into history’s dominant complexity.
Tumor de piel de localización atípica: Quiste Epidermico gigante perianal. Presentación de un caso.
Authors: SANTOS BRIAN URIEL 
Published: July 2021

Introducción: Los quiste epidermoides son lesiones benignas de crecimiento lento que se originan a partir de la epidermis. Afectan en su mayoría a hombres jovenes y adultos de mediana edad. Se presentan con más frecuencia en la cara, el cuello y el tronco, son atípicos en región perineal, extremidades, hueso y mama.
Caso clínico: masculino, 45 años, con tumoración perianal de 3 años de evolución. Disconfort al higienizarse y prurito. RMN informa lesión quística sin compromiso del canal anal. Exceresis completa del quiste con su capsula. Informe anatomopatologico: qusite epidermoide. Control clínico sin recidivas.
Conclusión: Los quistes epidérmicos en región perianal son atípicos. Es de relevancia descartar otras patologías como absceso, quiste pilonidal hasta lesiones tumorales. La exceresis quirúrgica completa sin efracciones y con su capsula es la regla a fin de evitar recidivas.
INFLUENCE OF MELODY FM NIGERIA GO BETTER, A PIDGIN ENGLISH RADIO PROGRAMME IN CREATING DEVELOPMENT AWARENESS IN WARRI, NIGERIA
Authors: Ubini Caroline , Oji Majority 
Published: July 2021

The study investigates how radio has been used as a carrier of development information to create awareness on development issues among people of Warri, Nigeria. The study builds on what researchers have recognized as the strength of radio in spurring peoples’ interest and participation in development matters. The study adopts the cross-sectional research method to sample the views of 240 respondents drawn from Warri population. The graduated data derived from a Likert scale were statistically analysed using percentages. The findings reaffirmed the rationalized position of scholars on the use of radio in the direction of development. The sustainability of the programme and the quest for future capable hands to continue to run the programme however remain a worry to the people and are recommended for action.
MỐI TƯƠNG QUAN CỦA SỰ TÍCH TỤ MỠ BỤNG TRÊN HÌNH ẢNH SIÊU ÂM VỚI CHỈ SỐ NHÂN TRẮC Ở BỆNH NHÂN GAN NHIỄM MỠ
Authors: Thị Sinh Nguyễn , Xuân Đàn Trịnh , Văn Quỳnh Nguyễn , Thị Bình Nguyễn , Thị Lệ Chi Hoàng , Thị Nguyệt Linh Đoàn 
Published: July 2021

Mục tiêu: Xác định mối tương quan của sự tích tụ mỡ bụng trên hình ảnh siêu âm với nhân trắc học ở bệnh nhân gan nhiễm mỡ. Đối tượng và phương pháp: Nghiên cứu mô tả cắt ngang trên 200 bệnh nhân có gan nhiễm mỡ và có gan không nhiễm mỡ bằng đo các chỉ tiêu: chiều cao, cân nặng, vòng bụng, vòng mông, chỉ số BMI, Tỷ lệ Vòng bụng/Vòng mông, độ dày lớp mỡ dưới da (ĐDLMDD), độ dày lớp mỡ trước phúc mạc (ĐDLMTPM), độ dày lớp mỡ nội tạng (ĐDLMNT). Kết quả và kết luận: Độ dày lớp mỡ dưới da với Độ dày lớp mỡ trước phúc mạc ( r = 0,23; p< 0,05) và Độ dày lớp mỡ dưới da với độ dày lớp mỡ nội tạng ( r = 0,18; p< 0,05) tương quan ở mức thấp; ĐDLMNT với ĐDLMTPM (r = 0,42; p <0,05) tương quan ở mức trung bình. Tương quan thuận ở mức trung bình giữa ĐDLMNT với các chỉ tiêu cân nặng (r = 0,48), vòng bụng (r = 0,47) và chỉ số BMI (r = 0,42) với p<0,05; tương quan thuận ở mức thấp giữa ĐDLMDD, ĐDLMTPM với chiều cao, cân nặng, vòng bụng và chỉ số BMI, với p>0,05.
TƯƠNG QUAN GIỮA ĐẶC ĐIÊM CARABELLI VÀ CHU VI THÂN RĂNG CỐI LỚN THỨ NHẤT VÀ THỨ HAI HÀM TRÊN TRONG ĐIỀU TRỊ NHA KHOA
Authors: Kim Khang Huỳnh , Châu Bửu Lộc Trương 
Published: July 2021

Mục tiêu: Xác định mối tương quan giữa mức độ biểu hiện đặc điểm Carabelli và chu vi thân răng cối lớn thứ nhất và thứ hai hàm trên. Phương pháp: Nghiên cứu cắt ngang phân tích, mẫu nghiên cứu gồm 45 răng cối lớn hàm trên (Carabelli độ 0 là 16 răng, dạng hố rãnh là 16 răng, dạng núm là 13 răng). Chu vi thân răng được xác định bằng cách vẽ một đường cong vòng theo đường viền của răng dựa trên ảnh chụp kĩ thuật số, đường viền được vẽ và đo đạc bằng phần mềm Autocad 2007 trên máy vi tính. Kết quả: Chu vi thân răng ở các hạng biểu hiện đặc điểm Carabelli là tương đối khác nhau ở M1 lần lượt là hạng 0 (38,5 ± 0,89) hạng 1 (39,6 ± 1,32) hạng 2 (40,7 ± 1,4); ở M2 lần lượt là hạng 0 (38,4 ± 0,89) hạng 1 (39,7 ± 1,39) hạng 2 (40,8 ± 0,56). Có mối tương quan thuận giữa chu vi thân răng cối lớn thứ nhất và thứ hai hàm trên với đặc điểm Carabelli lần lượt là 0,655 và 0,783( p <0,01). Kết luận: Có mối tương quan thuận giữa đặc điểm Carabelli và chu vi thân răng cối lớn thứ nhất và thứ hai hàm trên.
PANORAMA ACTUAL DE ARBITRAJE EN CONTRATACIONES CON EL ESTADO
Authors: GARCÍA VIZCARRA DIEGO FERNANDO 
Published: July 2021

La importancia de las contrataciones con el Estado ha dado lugar, en los últimos veinte años, al desarrollo de un marco regulatorio cada vez más amplio y especializado, en el cual la figura del arbitraje ha cobrado un protagonismo singular, dado que el propio ordenamiento peruano abstrajo de este mecanismo de solución de controversias sus características originarias, dotándole una identidad propia en este ámbito de aplicación.
Con los diversos cambios normativos que ha sufrido el régimen, el arbitraje en contrataciones con el Estado ha sido objeto de numerosos ajustes, tanto en lo sustantivo como en lo adjetivo, encontrándonos hoy en día ante una disciplina especializada que aún está en proceso de consolidación debido a que, si bien se han dado importantes pasos para la compatibilización del arbitraje con nociones e instituciones propias del Derecho Público, todavía incide significativamente en su desarrollo la frágil estabilidad del marco legal que lo contempla y la presencia de deficiencias regulatorias que no han podido coadyuvar a superar problemas suscitados en la práctica arbitral relacionados a su propia aplicabilidad e, incluso, al rol de los árbitros. En ese sentido, el presente trabajo tiene por objetivo graficar —desde una perspectiva analítica el actual panorama del arbitraje en contrataciones con el Estado, a partir de las principales reglas incorporadas en las recientes modificaciones a la Ley N.º 30225, Ley de Contrataciones del Estado, y a su Reglamento, cuya pertinencia y eficacia será objeto de reflexión en relación al contexto antes descrito, a partir de la ratio legis que se desprende de las mismas.
EL DELITO DE INSIDER TRADING EN ALEMANIA
Authors: QUIÑONES JAVIER FERNANDO 
Published: July 2021

El autor realiza un estudio del tipo penal de Insider Trading en Alemania, revisando los antecedentes históricos, la normativa interna y comunitaria, resaltando los aspectos altamente técnicos de la prohibición, así como a las corrientes que aún hoy critican su existencia. Así mismo, se menciona el efecto de las investigaciones fiscales y sanciones que, si han tenido lugar en Alemania, destacando que la prohibición tiene efectos reales en los mercados.
ABSTRACT
The author does a study related to the criminal law prohibition of Insider Trading in Germany, reviewing the historical backgrounds, the intern and European community regulation, and highlighting the highly technical aspects of the criminalization, as well as the movements that still now critic its existence. Also, is mentioned the effect of the prosecutions and sanctions that had taken place in Germany, showing that the criminalization has real effects in the markets.
(D)écrire les maux de la ville entre visibilité et invisibilité : de l’esthétique moderne à la poétique postcoloniale. Une étude par regards croisés
Authors: Yamb Gervais Désiré 
Published: July 2021

L’hypothèse centrale qui sous-tend cette réflexion est la suivante : le Tableau de Paris et Le Nouveau Paris de Mercier pourraient, dans une certaine mesure, apparaitre comme une pratique de l’écriture riche de possibilités, en ce sens qu’ils permettent non seulement de comprendre les configurations actuelles de certaines villes africaines postcoloniales, mais également d’élucider, d’un point de vue spatiotemporel, la continuité historique des « nouvelles » maladies de ces grandes métropoles telles que l’insalubrité, les inégalités, la criminalité, et l’urbanisation « chaotique ». C’est dans cette optique que Mercier a, à travers sa « physiognomonie », révélé le vice qu’est la corruption, cette « gangrène » qui tue Paris et ses habitants. Ainsi, la littérature panoramique s’érige en écriture de la résistance face à la déliquescence morale des habitants de la grande ville. Cette résistance entre non seulement dans cette conception d’une écriture totale de la ville africaine postcoloniale, mais également dans une compréhension de la pratique scripturaire chez Mercier dont l’ambition a, entre autres, été de « contaminer » son lecteur, de « guider » son regard panoramique et spatiotemporel sur les mutations des villes africaines postcoloniales. Mais résister, c’est aussi « articuler questionnement moral et création littéraire en décrivant une humanité malfaisante et criminelle, livrée à la cruauté et aux mensonges ».