bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of a Mathematical Model and Validation for Methane Production Using Cow Dung as Substrate in the Underground Biogas Digester
Authors: Obileke KeChrist , Mamphweli Sampson , Meyer Edson L. , Makaka Golden , Nwokolo Nwabunwanne
Published: April 2021

South Africa is highly dependent on conventional fuels from non-renewable energy sources such as coal and fossil fuels. The methane from biogas is a renewable energy source for generating electricity using a combined heat and power plant. Therefore, the aim of the study is to develop and validate a mathematical model for predicting methane production in an underground biogas digester. The developed model was able to predict the production of methane gas as separate entity differing from other models. A total of 286 datasets were used as a trained dataset for the model development, and 144 datasets served as test data for the validation of the model, making a total of 430 measured datasets of all the predictors. The determination coefficient (R2) and the p-value of the predicted and calculated methane yield were 0.962 and 0.920, respectively. The high R2 in the present study confirms a good correlation between the model and experimental value. Hence, the model is of significance because it is applicable in predicting the performance of methane production of systems of the same design used in different locations, thereby arriving at the same constant values. From the study, the ambient weather factors (ambient temperature, relative humidity, and global horizontal irradiance) affected the methane production. Additionally, the indoor parameters (pH, gas temperature, slurry bottom and slurry top temperature) impacted on the yield of the methane production because the scaling factors associated with these quantities are non-zero real numbers. Hence, the scope of the study did not consider the volume of the biogas digester as an input parameter to the response.
Estimating Breakup Frequencies in Industrial Emulsification Devices: The Challenge of Inferring Local Frequencies from Global Methods
Authors: Håkansson Andreas
Published: April 2021

Experimental methods to study the breakup frequency in industrial devices are increasingly important. Since industrial production-scale devices are often inaccessible to single-drop experiments, breakup frequencies for these devices can only be studied with “global methods”; i.e., breakup frequency estimated from analyzing emulsification-experiment data. However, how much can be said about the local breakup frequencies (e.g., needed in modelling) from these global estimates? This question is discussed based on insights from a numerical validation procedure where set local frequencies are compared to global estimates. It is concluded that the global methods provide a valid estimate of local frequencies as long as the dissipation rate of turbulent kinetic energy is fairly homogenous throughout the device (although a residence-time-correction, suggested in this contribution, is needed as long as the flow is not uniform in the device). For the more realistic case of an inhomogeneous breakup frequency, the global estimate underestimates the local frequency (at the volume-averaged dissipation rate of turbulent kinetic energy). However, the relative error between local frequencies and global estimates is approximately constant when comparing between conditions. This suggest that the global methods are still valuable for studying how local breakup frequencies scale across operating conditions, geometries and fluid properties.
A Multi-DoF Prosthetic Hand Finger Joint Controller for Wearable sEMG Sensors by Nonlinear Autoregressive Exogenous Model
Authors: Gao Zhaolong , Tang Rongyu , Huang Qiang , He Jiping
Published: April 2021

The loss of mobility function and sensory information from the arm, hand, and fingertips hampers the activities of daily living (ADL) of patients. A modern bionic prosthetic hand can compensate for the lost functions and realize multiple degree of freedom (DoF) movements. However, the commercially available prosthetic hands usually have limited DoFs due to limited sensors and lack of stable classification algorithms. This study aimed to propose a controller for finger joint angle estimation by surface electromyography (sEMG). The sEMG data used for training were gathered with the Myo armband, which is a commercial EMG sensor. Two features in the time domain were extracted and fed into a nonlinear autoregressive model with exogenous inputs (NARX). The NARX model was trained with pre-selected parameters using the Levenberg–Marquardt algorithm. Comparing with the targets, the regression correlation coefficient (R) of the model outputs was more than 0.982 over all test subjects, and the mean square error was less than 10.02 for a signal range in arbitrary units equal to [0, 255]. The study also demonstrated that the proposed model could be used in daily life movements with good accuracy and generalization abilities.
Assessment of Static Steadiness and Dynamic Stability at Various Stages of Healing of a Grade 2 Medial Collateral Ligament Tear: A Case Report
Authors: Glattke Kaycee , Smith Michael , Tsuchiya Toshiki , Wells Jakob , Lockhart Thurmon
Published: April 2021

Injuries to ligaments of the knee are extremely common among athletes who participate in high-risk sports or any sport that requires frequent cutting motions, jumping, or contact. In order to determine the best way to heal these injuries, it is important to understand not just the pathology of the injury but also the biomechanical factors that are affected, including stability and steadiness. While many studies have been conducted to examine the stability of healthy knees, there is little to no existing literature on stability of knees afflicted by injury. In order to surpass this obstacle, static steadiness and dynamic stability data were collected using the Lockhart Monitor phone application and Xsens accelerometers, respectively, both before and after completion of a course of physical therapy in a subject with a grade 2 medial collateral ligament (MCL) tear. These results were then used to determine the degree to which the prescribed physical therapy protocol was effective in healing the MCL, which can be useful for adjusting the individual protocol for future conservative treatment and management of the injury.
Comparative Analysis of Key Factors Encouraging Food Delivery App Adoption Before and During the COVID-19 Pandemic in Thailand
Authors: Chotigo Jankit , Kadono Yasuo
Published: April 2021

This study examines and compares the crucial factors encouraging Thai customers to use food delivery apps before and during the COVID-19 pandemic on the basis of the modified conceptual paradigm of Unified Theory of Acceptance and Use of Technology 2 (UTAUT2), including the following external factors: trust, convenience, application quality, and satisfaction. Data were collected from 220 food delivery app users before the pandemic and 250 food delivery app users during the pandemic. The data were analyzed using structural equation modeling based on AMOS 23.0 to test model validity and the study hypotheses. The results indicated that satisfaction was influenced by social influence, trust, convenience, and application quality in both the before- and during-the-COVID-19-pandemic samples. In addition, price value was a significant predictor of satisfaction before the pandemic but not during the pandemic, whereas habit was found to significantly influence satisfaction before the pandemic but was found to negatively influence satisfaction during the pandemic. Additionally, the results of both samples showed that customers with a high level of satisfaction using a food delivery app were more likely to keep using it. The findings may assist marketers in developing appropriate strategies for food delivery app activities.
Open Source 3D-Printable Planetary Roller Screw for Food Processing Applications
Authors: Guadagno Marcello C. , Loss Jacob M. , Pearce Joshua M.
Published: April 2021

Historically, open source agriculture (OSA) was based on grassroots technology generally manufactured by hand tools or with manual machining. The rise of distributed digital manufacturing provides an opportunity for much more rapid lateral scaling of open source appropriate technologies for agriculture. However, the most mature distributed manufacturing area is plastic, which has limited use for many OSA applications. To overcome this limitation with design, this study reports on of a completely 3D-printable planetary roller screw linear actuator. The device is designed as a parametric script-based computer aided design (CAD) package to allow for the easy adaption for a number of applications such as food processing at different scales. The planetary roller screw is fabricated in dishwasher-safe polyethylene terephthalate glycol (PETG) on an open source machine and tested using an open source testing platform to determine if it could maintain a constant load without slipping and the maximum force. Then, this output is compared to a direct screw press using the same materials. The results found that the maximum force is more than doubled for the roller screw actuator using the same materials, making them adequate for some food processing techniques. Future work is outlined to improve the performance and ease of assembly.
Immune Responses Elicited by Live Attenuated Influenza Vaccines as Correlates of Universal Protection against Influenza Viruses
Authors: Jang Yo Han , Seong Baik L.
Published: April 2021

Influenza virus infection remains a major public health challenge, causing significant morbidity and mortality by annual epidemics and intermittent pandemics. Although current seasonal influenza vaccines provide efficient protection, antigenic changes of the viruses often significantly compromise the protection efficacy of vaccines, rendering most populations vulnerable to the viral infection. Considerable efforts have been made to develop a universal influenza vaccine (UIV) able to confer long-lasting and broad protection. Recent studies have characterized multiple immune correlates required for providing broad protection against influenza viruses, including neutralizing antibodies, non-neutralizing antibodies, antibody effector functions, T cell responses, and mucosal immunity. To induce broadly protective immune responses by vaccination, various strategies using live attenuated influenza vaccines (LAIVs) and novel vaccine platforms are under investigation. Despite superior cross-protection ability, very little attention has been paid to LAIVs for the development of UIV. This review focuses on immune responses induced by LAIVs, with special emphasis placed on the breadth and the potency of individual immune correlates. The promising prospect of LAIVs to serve as an attractive and reliable vaccine platforms for a UIV is also discussed. Several important issues that should be addressed with respect to the use of LAIVs as UIV are also reviewed.
Bir Mecmûanın Serencâmı: Süleymaniye Kütüphanesi Süleymaniye No. 876’da Kayıtlı Şâhidî (Manzum Sözlük) Mecmûası Üzerine
Authors: SİNAN NİZAM Betül
Published: April 2021

Sözlükbilim çalışmalarına veri sağlayan kaynaklardan biri Osmanlıda çocuklara dil ve aruz bilgisi öğretme amacıyla yazılan manzum lugatlardır. Klasik Türk edebiyatı geleneğinde oldukça önemli bir yeri olduğu anlaşılan manzum sözlükler ile ilgili bugüne kadar pek çok araştırma yapılmış, türün belli başlı örnekleri araştırmacılar tarafından yayımlanmıştır. Bununla birlikte kütüphanelerde farklı dönemlerde farklı şairlerce çeşitli dillerde yazılmış manzum sözlükleri bir arada barındıran çok sayıda mecmûa da bulunmaktadır. Henüz üzerinde yeterince çalışma yapılmamış bu mecmûalar, eğitim faaliyetlerinde yaygın olarak kullanılan, bir başka deyişle çok okunan/popüler sözlükleri işaret etmesi bakımından önemlidir. Bu makalede Süleymaniye Kütüphanesi Süleymaniye 876 numarada kayıtlı bulunan manzum sözlük mecmûası detaylı olarak tanıtılmıştır. Şâhidî Mecmûası olarak isimlendirilen ve 165 varaktan oluşan mecmûanın farklı tarihlerde farklı müstensihlerce istinsah edilen sözlüklerin/mecmûaların sonradan derlenmesiyle oluştuğu anlaşılmaktadır. Mecmûada yer alan on sözlükten ikisi Arapça-Türkçe, beşi Farsça-Türkçe, üçü Arapça-Farsça sözlüklerdir. Arapça-Farsça sözlüklerden ikisi Nisâbü’s-Sıbyân ve satıraltı tercümeleridir. Halîmî’ye ait bir sözlüğün ayrı bölümlerinin -farklı mecmûalarda da karşılaşıldığı gibi- ayrı sözlükler olarak kaydedildiği görülmektedir. Tertibinde birtakım karışıklar olan mecmûada eksik varaklar da bulunmaktadır.
Mecanismos neurobiológicos del dolor de origen no maligno asociado a estructuras óseas
Authors: Muñoz-Islas Enriqueta , Ramírez-Rosas Martha Beatriz , Torres-Rodríguez Héctor Fabián , Acosta-González Rosa Issel , Jiménez-Andrade Juan Miguel
Published: April 2021

Introduction. Despite the high prevalence of musculoskeletal diseases, the neurobiological mechanisms underlying bone-related pain are not fully known. Objective. To summarize the information on neurobiological mechanisms of bone structures-related pain that has been reported in the last two decades. Material and Methods. A scientific search was performed on the PubMed platform in the last 20 years using the keywords pain, bone, skeletal, non-malignant, aging, periosteum, and nerve fibers. Results and Discussion. Significant advances in biochemical, immunohistochemical and imaging techniques have helped to characterize sensory and sympathetic innervation of different natural compartments in healthy tissue. Likewise, several preclinical models of acute and chronic musculoskeletal pain —providing a clearer understanding of the mechanisms underlying bone-related pain— have been established.
Oncoguía de cáncer de mama 2020
Authors: Bargalló Rocha Juan Enrique , Esparza Arias Nereida , Rivera Daniel , Ramírez Raúl , Espinosa Rodrigo , García Lizeth , Cabrera Galeana Paula
Published: April 2021

Breast cancer is a world health problem, and in our country is generally diagnosed in advanced stages. Departamento de Tumores Mamarios from Instituto Nacional de Cancerología developed Oncoguía de cáncer de mama 2020 based on a consensus methodology conducted among its members: clinical oncologists, surgical oncologists, radiation therapists, nurses, and social workers. Such specialists carry out multidisciplinary management (detailed in this Oncoguía) through a clinical assessment performed by Unidad Funcional, and it is based on surgery, radiotherapy, and systemic treatment, either adjuvant, neoadjuvant or palliative. The systemic management also includes chemotherapy, hormone blockade, and biological therapy. These guidelines also include algorithms to make decisions in every clinical stage
Actualización en terapia biológica para psoriasis y artritis psoriática (parte I): moléculas pequeñas, inhibidores de JAK y agentes biológicos (inhibidores IL-17)
Authors: Flores Rodrigo , Fuente Raúl de la , Bozán Francisca , Vergara Karen , Valenzuela Fernando
Published: April 2021

Psoriasis is a chronic, inflammatory skin disease associated with cardiovascular comorbidities, metabolic syndrome, neoplasms, psychiatric impairment, and arthritis, among others, which affect patients’ quality of life, as well as their life expectancy. Even though it is a multifactorial process of unknown causes, its relationship to class 1 HLA alleles and their polymorphisms has been described. Its physiopathology involves a dysregulation of the systemic inflammatory response —mediated by T Helper lymphocytes, dermal cells, cytokines, and interleukins—, as well as their interactions with keratinocytes and synovial cells. This triggers differentiation of lymphocytes towards a Th 17 phenotype, which activates inflammatory processes mediated mainly by interleukin 17 (IL-17), with the subsequent proliferation of keratinocytes and inflammatory and angiogenic mediators, resulting in the typical cutaneous and osteoarticular clinical features. Biological agents are recombinant proteins produced in different cell lines aimed at interrupting inflammatory pathways in psoriasis and psoriatic arthritis, specifically, immune or genetic mediators involved in the progression of these diseases, ultimately targeting the IL-23 / IL-17 axis. This review aims to discuss the most recent literature regarding the use of small molecules, JAK inhibitors, and biological agents (IL-17 inhibitors) in the treatment of psoriasis and psoriatic arthritis, mainly referring to their efficacy and safety. Using these molecules means a fundamental change in the approach to patients with psoriasis and psoriatic arthritis. As a specific mediator-targeted therapy, it enhances effectiveness, and at the same time, reduces the associated adverse effects. Therefore, it is essential to know how they work from a physiopathological point of view, as well as assessing their effectiveness in humans through randomized clinical trials. Current knowledge allows us to conclude that despite biological agents being the best treatment option in psoriasis as well as in psoriatic arthritis, comparative studies —among drugs of the same group and groups— are still required. Besides, their high price is another problem to solve before they can be massively used in these patients.
Howard Phillips Lovecraft’s The Beast in the Cave: an interpretation
Authors: Vasileva Elmira V.
Published: April 2021

The article proposes a concept study of one of Howard Phillips Lovecraft’s earliest pieces The Beast in the Cave (1905). The author employs elements of biographical and mythological (Jungian) approaches to the text, synthetising them in order to achieve a complex understanding of Lovecraft’s work. In the study the author tries to reach three interconnected goals – to come up with an interpretation of the text previously ignored by the critics and thus to include The Beast in the Cave in the Lovecraftian canon, as well as to establish a link between the writer’s personal circumstances and their metaphorical embodiment in the text in question. The author of the article concentrates upon several crucial elements of the short story – the topos of the cave and the three principal characters (the protagonist, the beast, and the guide who comes to the narrator’s rescue in the end). Despite the fact that Lovecraft’s story had been composed almost thirty years prior to the first publication of some of Carl Gustav Jung’s principal ideas on archetypes of the collective unconscious, the young writer seems to be able to intuitively foresee the artistic potential of the cave monomyth (the hero goes down the abyss and fights the monster who lives there). Lovecraft masterfully relates the myth, simultaneously turning this general story into a very personal account of his own tragic experience and his way of coping with the crisis. Such an interpretation makes it possible to perceive The Beast as an early example of Lovecraft’s “mythologising” écriture.
Early plays by Anton Chekhov: a dialogue with Ivan Turgenev
Authors: Bigildinskaya Olga V.
Published: April 2021

This article tells about the influence of the poetics of Ivan Turgenev's works on the features of early Anton Chekhov’s drama – the student play “Platonov” (1880–1881), “Ivanov” (edited in 1888–1889) and “The Wood Demon” (1888–1889). The author studies in detail the degree of Chekhov's familiarity with the body of Turgenev's dramatic texts. The author reveals the unity of the chronotope of the noble nest, distant plot similarities (self-serving motivations of actions), and the thematic motif of self-condemnation of the characters. It is shown that in Chekhov's plays there are characters typologically close to Turgenev (Superfluous Man, Hamlet, Don Quixote, “Turgenev's girl”, sponger), and there are also such elements of the poetics of Turgenev's drama as monologue, the reception of interruptions, micro-plots. The article draws attention to the fact that Chekhov was the successor of the dramatic tradition established in Turgenev's work, and developed, rather than making direct borrowings. Thus was the nature of Chekhov's creative work, focused on a dialogue with the Turgenev heritage.
Pavel Bulygin’s Abyssinian poems in the magazine “Rubezh” (Border) (Harbin, 1935–1936)
Authors: Kulikova Elena Yu.
Published: April 2021

The article is devoted to the Abyssinian poems by Pavel Bulygin, a poet and a prose writer who left Russia after the revolution, whose poems were published in Harbin weekly “Rubezh” (Border) (1935–1936). Exotic motives are analysed in the poet's work, for whom, following Nikolay Gumilyov, Africa became a “guiding star”: Bulygin's collection of poems “Alien Stars” is dedicated to Abyssinia – the name of the cycle clearly refers to Gumilyov's “Alien Sky”. Special attention is paid to the May issue of “Rubezh” (1936), where Bulygin’s five poems from the cycle “Alien Stars” were published under the general title “The poems about Abyssinia”. These texts are considered as a microcycle, united thematically – Bulygin's poetic bestiary is described, focused on Gumilyov in many respects; the literary nature of the poet's affection to African travels is noted not only through Gumilyov’s lyrics, but also through James Fenimore Cooper and Jack London’s adventure novels; it is pointed out that the poet uses the technique of “imaginary” ekphrasis, when instead of a really existing picture, his own one is recreated – poetic and as if picturesque at the same time. In addition to the publication in the May issue of “Rubezh” in 1936, there are Bulygin’s works, published in Harbin weekly in 1935 (“Saw Gin” (“Hyena-Man”), “Russian in Abyssinia”, “From a heated red stone...”). Immersion in African topos, warmed for Bulygin by Gumilyov's poetry and travels, helps the emigrant poet escape from loneliness, anguish and nostalgia.
The innermost men of Andrei Platonov: the typology of artistic, historical-literary and cultural context
Authors: Ivanov Nikolay Nikolaevich
Published: April 2021

Types and characters of Andrei Platonov, his skill in creating artistic images, forms and ways of presenting the author's world – a topical historical and literary problem, which is considered in the context of modern research of Russian literature in the 1920s-1930s. This work is devoted to “innermost men” – Platonov author's discovery, certain artistic types, individualised, original and archetypal at the same time. They appeared as the result of Platonov's thought-making and language-making, superimposed on the colour of the epoch, historical, literary and cultural traditions. These and other difficult-to-grasp connections, intersections, and interactions were characterised in the course of research, which is based on the methodology of mythopoetic reconstruction of textual structures and discursive practices. Folklore and mythopoetic archetypes were established, and Platonov's creative motives were systematised. The most significant results of the work are the following. The existing ideas about the type of Platonov's artistic thinking are supplemented; the historical, literary and cultural context of the author's position formation is revealed; the functional side of mythopoetic motifs and archetypes in the creation of images is shown; new assessments of the content and form of a number of well-known works are given. Skill of Platonov is meaningful in the context of contemporary Russian prose of the 20th century, of neonatologists and word creation; augmented scientific understanding of complex phenomena in Russian literature of the first half of the 20th century.
“And I woke up”: a new book about Leo Tolstoy
Authors: Fedotova Anna A.
Published: April 2021

The review notes that Irina Luchenetskaya-Burdina presents a wide panorama of the Russian cultural and literary life of the second half of the 19th century, in the context of which the artistic and journalistic heritage of Leo Tolstoy has been examined. The structure of the monograph is analysed, the breadth of coverage of the material is emphasised, as well as scientific approach to the studied problem, attractive to the general reader and at the same time promising. The review describes the range of problems considered by Irina Luchenetskaya-Burdina, the successful and non-trivial observations of the author of the new book are noted.
The legal status of the Jewish population in Russia: a political and analytical review (the late 18th – early 20th centuries)
Authors: Rozina Olga V. , Volkova Tatyana I.
Published: April 2021

The problem of mythologising the history of Russia in the context of the thesis “prison of the peoples” remains topical in the context of the modern information warfare of civilisational opponents. An attempt to implant in the public consciousness a myth about the exclusively discriminatory nature of the imperial nationality policy, in particular, on the Jewish question, prevents from objective examination of the ongoing processes. The article analyses the main tendencies of the state policy towards Jewish subjects of the Russian Empire during the reign of four emperors – Alexander I, Nicholas I, Alexander II and Nicholas II. The work used various sources, materials and research. The article provides a general overview of historiography on the problem, and also examines the creation of the Pale of Settlement, measures in the field of restricting the civil rights of the Jewish population and education. The authors come to the conclusion that the policy of the Russian Empire in the Jewish question was not anti-Semitic, although it was ambiguous and, at times, contradictory. At the same time, restrictive measures did not apply to the religious and ritual-cult side of the life of the Jews. The historical and factual basis of the publication helps to understand the building of civilised relations in the environment of Russian society, which is represented by different cultures and religions.
Public organisations of Vologda in the early 20th century
Authors: Ivanov Kirill А.
Published: April 2021

The article describes the activities of public organisations in the early 20th century in Vologda and Vologda Province. It is shown that the activity of the public was constantly growing during the study period. Moreover, the political activity of the society was significantly influenced by all-Russia events, while non-political organisations slowly but surely extended their influence to an increasing number of spheres of life of the local population. Public organisations constantly cooperated with both state authorities and local self-government. The research is based on working with materials on Vologda Province, their analysis to understand how the mechanism of cooperation and interaction of local self-government bodies with the provincial government, the Governor and the bureaucracy was built. As a result of the study, it became possible to show that the number of public organisations in Vologda Province had been growing since the early 20th century, although the number of political organisations was not enough. There were also no serious conflicts or opposition from the authorities in relation to public organisations. Most of the public structures were apolitical in nature and dealt mainly with social issues without paying attention to the problems of interaction with the state authorities.
Kostroma anti-religious campaigns of the 1920–1930s
Authors: Zyablikov Alexey V.
Published: April 2021

The article analyses the reasons, methods and forms of anti-religious struggle in Kostroma land in the 1920s – 1930s. The article focuses on the activity of Kostroma branch of the League of Militant Atheists, whose efforts, in the author’s opinion, were aimed at building the ideological basis for the coming anti-church and anti-religious terror. The author of the article argues that fight against god was one of the meaning-forming ideologies of the emerging Soviet system, though aggressive atheistic propaganda in Kostroma turned out to be ineffective as Orthodox traditions allegedly were particularly strong here. The conclusion is made about the planned and purposeful destruction of the religious shrines of Kostroma and its historical appearance. After the attempts of a polemical dialogue with the Church in the first post-revolutionary years in the 1920s the Bolshevik government used the tactics of satirical ridicule of religion and religiosity, using all propaganda arsenals at the disposal of the state. It is claimed in the article that having being defeated at the front of anti-religious propaganda and agitation in the 1920s, the authorities did not hesitate to switch to repressive and punitive measures in the 1930s. Soviet and Communist Party leaders are depicted in the article as those who considered physical destruction of churches and the most active and influential part of the clergy to be the only effective means of fighting religion in Russian cities.
On the issue of formation of the new periodisation of the USSR vs Axis part of World War II: experience of solving the problem
Authors: Ladyga Alexander I.
Published: April 2021

The article reviews the process of formation and improvement of hypotheses of periodization in the Soviet and Russian historiography of the USSR war against the Axis, the key provisions of these hypotheses are given and revealed. Taking into account the comments of military experts of the past years, the author proposed a periodisation, where the criteria for the division of the war into periods include: changing the war activities ways – the determining criteria; the war activities conditions (the nature of war, coalitions creation or split, changes in the international and internal situation of the warring countries, etc.); organisation, training, combat experience, armed forces (and others) and their influence on the combat capabilities of the army; the level of the struggle of peoples against the occupation, the development of the Resistance movement (including Germany); the evolution of the war economy of the warring countries and its influence on the armed struggle. In the author's periodisation, the periods are divided into stages, taking into account the conditions, features and specifics of war activities. The features and trends of history description at different stages of the evolution of scientific knowledge are identified and the main scientific schools and institutions that studied the periodisation of the World War II East Front are named.
On the problems of the rural population in the period of late socialism (on the example of the Far East of the RSFSR)
Authors: Grinko Andrey A.
Published: April 2021

The article examines the life activity of the rural population of the Russian Far East in the 1970s – the first half of the 1980s through a set of existing problems and contradictions. Special attention is paid to a number of socio-economic phenomena that caused a negative reaction of rural residents, primarily agricultural workers. The attitude that the villagers felt towards their position in the region and in the structure of the Far Eastern society should not be considered purely negative. It also had positive manifestations. Nevertheless, within the framework of this article, the author focuses on the negative aspects of life, which were permanent and intensified under the influence of both subjective and objective factors. Topicality of this issue is given by the fact that many processes that affected the villagers of the late socialism era also take place in modern Russian reality. The author notes the complexity and ambiguity of the existing problems, the insufficient efforts of the authorities to overcome them, and the formation by the mid-1980s of a clear trend of the outflow of young, able-bodied and qualified population to more favourable areas, primarily cities.
Empty Sella Turcica and Papilloedema: Two Cases Reports
Authors: Shrestha Dr. Eliya , Gurung Dr.  Hara Maya , Maharjan Dr. Indra Man , Gurung Dr. Babita , Adhikari Dr. Hari Bikram
Published: April 2021

Purpose: To report a case of papilloedema with partial empty sellaturcica.

Methods: Retrospectively review the clinical features, magnetic resonance imaging records and treatment effects of a patient using Methylprednisoslone.
Using PALM-COEIN FIGO Classification for Categorization of Patients with Abnormal Uterine Bleeding
Authors: Acharya Foram P. , Patel Babulal S. , Shah Akshay C. , Jani Shashwat K.
Published: April 2021

Background: Abnormal uterine bleeding is one of the most common problems of the women of reproductive age group leading to increased number of hospital visits. For describing and categorizing the common problem of abnormal uterine bleeding in these women, an alternative classification system polyp, adenomyosis, leiomyoma, malignancy and hyperplasia, coagulopathy, ovulatory dysfunction, endometrial, iatrogenic, and not yet classified, known by the acronym PALM-COEIN was developed by FIGO.
Methods: This is a retrospective study on 150 patients of abnormal uterine bleeding to categorize them on the basis of PALM-COEIN classification. Patient were grouped under these categories after detailed history, examination, investigations and histopathological reports.
Influence of Aggressivity of Water on the Long Term Sustainability of Hydro Power Structures – A Review
Authors: Anand Beena
Published: April 2021

To fulfil country’s irrigation and power requirements various large capacity dams have been constructed on major rivers in last 50 years. The long term sustainability of these structures is largely dependent on hydro-environment and the capacity of these structures to resist weathering action, chemical attack, abrasion, or any other process of deterioration. The concrete deterioration is directly influenced by various geographical, climatic and ecological conditions. The chemical reactions between cement and water enable the setting and hardening of cement, resulting in a binding medium for the aggregates and development of strength. Quality of water plays an important role in the production of concrete. There are some chemical environments under which the useful life of even the best concrete will be affected adversely. The aggressiveness of water is dependent on the pH value, the total dissolved salts, the degree of hardness, soluble chlorides, sulphates, carbonation, temperature and alkalinity etc. Understanding these conditions permit measures to be taken to prevent or reduce deterioration.
Aplicación de Internet de las cosas en el monitoreo de la producción de lombricomposta
Authors: Alanis-Teutle Raúl , Ramirez-Chocolatl Yuridia , Alonso-Calpeño Mariela Juana , Santander-Castillo Julieta
Published: April 2021

In this article we show the results of the application of an architecture based on Internet of things for the production of vermicompost through an interface that allows to monitor and collect temperature, humidity, and pH data through intelligent sensors that use the cloud computing service. The methodology used for the construction of the architecture was based on a search of the state of the art in open databases. For the implementation of the same, a pure experiment with a dependent variable and two independent ones was built. The results obtained by the measurements made during a period of four months, allowed to create grapHs where the constant temperature changes are observed in a range of 19 to 27 ° C, humidity in the range of 41% to 85% and the pH of 5 to 8.4 in the acid of the substrate. This information obtained in a ubiquitous way, helped the user to generate a weekly plan for irrigation, aeration, and mixing of the vermicompost, in order to reduce time, costs and human effort. It also helped maintain optimal environmental conditions for the reproduction of earthworms.
Aula interactiva 3D como recurso para la enseñanza en el Tecnológico Nacional de México campus Oaxaca
Authors: Altamirano-Cabrera Marisol , Benitez-Quecha Claribel , Diaz-Lara Carlos Alberto , Toral-Enriquez Fernando
Published: April 2021

This article builds a prototype of an immersive virtual classroom implemented in the I.T.Oaxaca that serves as support to the learning process of the students of Computer Systems Engineering. Without discarding in the future, this advisory platform will be incorporated into other engineering services offered at the institution. The experimental proposal uses the metaverse of Second Life, simulating physical spaces in three dimensions and allowing users (avatars) to interact with each other in order to exchange information and experiences. Despite being in the beta phase of the implementation, interesting indicators and learning expectations have been obtained in the students by associating the knowledge mediated by the interaction between their avatars and the 3D scenography; which immerses the student in a new study adventure with high levels of interactivity, leading it in an informal way to a new learning style.
Sistema de reconocimiento de patrones de turismo regional aplicando algoritmos de minería de datos
Authors: Nieto-Yañez Alma Delia , Hernández-Báez Irma Yazmín , López-Díaz Roberto Enrique , Rojas-Sandoval Daniel
Published: April 2021

Secretaría de Turismo in Mexico does not have enough information about regional tourism in the country, in comparation with data of international tourism, in which, a tourist profile is obtained to know purpose of the travel, stay, transportation used and another data to allow the identification of mechanisms to improve the tourist offer and, in this way, potentiate the arrival of tourist to the country. On the other hand, to national and regional tourism the profile is omitted, making it difficult to identify patterns of behavior, and is an area of opportunity to obtain them using cell phone networks. The purpose of the presented work is to identify patterns of behavior of national and regional tourism using data mining algorithms to analyze the data of connection of cell phones. The analysis of the information is achieved with KDD methodology in combination with K-means algorithm, first determining the place of residence of a person and next, detecting the connections outside this place. With the executed tests using several patterns of behavior, it was possible to determine if a person carried out national and regional tourism using measures of time and distance between their connections to cell network.
Uso de dispositivos móviles para la enseñanza y aprendizaje en estudiantes de ingeniería: Hacia el uso de tecnología 5G
Authors: Alcantara-Rosales Rodolfo , Rendón-Rosas Juan Carlos , Moreno-Reyes Hugo , Casteñada Bravo Juan Alfonso
Published: April 2021

Education is inextricably linked to the different stages of the history of mankind. In this sense, today's education is strongly influenced, by the digital age, by the great advance of information and communication technologies, by the global village and the neoliberal economic model. This forces us to assume the challenge that the incorporation of technology imposes on the formative processes in the classroom. The present work has as objective, to determine the use of mobile devices of students of the engineering careers in the Technological of Superior Studies of Jilotepec in the processes of learning and to idendificar those processes that foment their use. The study is based on the application of a survey in which the different engineering careers were considered, number of participating students by gender, age, use of equipment, use of mobile devices to read or study, time of use of mobile to study or consult subjects related to the different subjects as well as the type of networks consulted on the Internet. Finally, it shows the technological trend with the generation 5G and its application in the teaching and learning process in the very near future.
Organización del almacén de garantías de una empresa distribuidora automotriz de Ciudad Obregón
Authors: Beltrán-Esparza Luz Elena , González-Valenzuela Elizabeth , Fornés-Rivera René Daniel , Godoy-Bojórquez Fabiola Berenice
Published: April 2021

This project was carried out in the warehouse of guarantees of an automotive distribution company in Obregon City, which presented the disorganization of parts, unnecessary files, clogged floors and lack of cleanliness, causing the time to search for parts and files to be extended. Therefore, the objective of improving the conditions of organization and cleanliness of the warehouse was established through the 5'S philosophy. The procedure consisted of: describing the area under study; evaluate the initial situation of the warehouse; train the staff; elaboration of inventory of warehouse objects; separation of necessary and unnecessary objects; subsequently a place was assigned to each object, then the area and objects of the store were cleaned; standards were developed for the activities carried out in the warehouse; the level of compliance with the 5'S philosophy was measured and finally the final warehouse situation was evaluated. Initially, the situation of the warehouse as criteria of 5'S had a 16.47% compliance and once implemented the philosophy 5'S, the rating was increased to 92.94%, therefore, the objective of this project was achieved that was to improve the conditions of organization and cleaning of the warehouse.
Análisis de los factores de productividad, desperdicio y confiabilidad de los equipos, al implementar TPM en una empresa del sector automotriz
Authors: Landeros-Correa Carmen , Chihuaque-Alcantar Jesús , Melesio-Moreno Ma. Guadalupe , Galván-García María Isabel
Published: April 2021

Total productive maintenance (TPM), is one of the practices most used by automotive companies, to increase their productivity, which is why this research is carried out in an automotive company validating this assumption, with the implementation of the TPM in a productive line and determining by means of an experiment design, if the TPM does not significantly affect the indicators of efficiency, waste, reliability of the equipment, because these indicators are important for the productivity of the company. With this analysis it was possible to demonstrate, for this particular case, that the MPR tool does help improve two of the indicators, although this conclusion only applies to this company and the line in which said analysis was applied, under the conditions in which was evaluated the tool, so that this conclusion is more general, it has to be evaluated in other companies and to be able to make the comparison of the behavior in each of them.
Tecnicas de mantenimiento
Authors: Fernande- Gomez Tomas , Ramirez-Rodriguez Ramon Rodolfo , Miranda-Sanchez Francisco Javier , Merino-Rosas Ignacio Celestino
Published: April 2021

The focused improvements are activities in which they are developed with the intervention of the different areas in a productive process, it is a development in the process of continuous improvement similar to that existing in processes of Total Quality Control applying procedures and maintenance techniques. Maintenance is a set of activities that are carried out daily in the equipment, including inspection, lubrication, cleaning, minor interventions, change of tools and pieces studying possible improvements. Progressive maintenance is a pillar of the most important in the pursuit of benefits in an industrial organization. The maintenance of quality seeks to establish as a purpose that the team has the "zero defects". The PTEE or Total Effective Productivity of the Equipment is a measure of the real productivity of the equipment, it is a measure that indicates the amount of time used by the equipment, the overall effectiveness of the equipment evaluates the performance of the equipment while it is in operation, this allows to prioritize between several maintenance projects, those most significant in the improvement of the plant.
Máquina virtual de remachado textil
Authors: Camarena-López Stephany Samayrani , Castro-León José Manuel , Vega-Toledo José Jesús , González-Durán José Eli Eduardo
Published: April 2021

One of the process in the textile industry is the eyelet assembly in the different products, for it is used a “Riveter”. This machine is used to place rivets on textile garments or footwear, for esthetic or reinforcement purposes. There are three types of riveters: "Manuals", "Semi-automatic" and "Automatic"; one of the problems that these presents are the manual calibration because human intervention is required. A virtual machine for an automatic textile riveter was developed using CAD software as SolidWorks where the design of the mechanical systems that integrate the virtual machine, together a visual programming software, LabVIEW, is used, in which a front panel is developed, capable of controlling the entire production process as long as there is a link between these two interfaces through "LabVIEW Soft Motion " The communication between this two software achieve to characterize a "Virtual Machine of Riveted Textile" where it is improved in the riveting of eyelets in less than two seconds, the ability to rivet 4 different sizes of eyelets and automatic calibration using a mechanical system called "LongWorth-Chuck", this contributes to an optimization of conventional riveting machines.
Sistema Integral para la Gestión del Programa de Tutorías en el Instituto Tecnológico de Tehuacán
Authors: García-Ortega Irene , Vásquez-Gamboa Saira Antonieta , Rodríguez-Ramírez Felipe , Sandoval-González Yeyetzin
Published: April 2021

The tutoring in the Technological Institutes has been implemented as a support strategy for the integral formation of the student, where the teacher becomes his companion in his professional training process, developing activities that have the purpose of stimulating the integral human development of the student. The present work presents the design of a web system, to support the management of the tutorial program, and the tutorial task, involves each of the different actors (Institutional coordinator, coordinator of area tutorials, department head, tutors and tutors). This web system was the result of the investigation Analysis of the tutorials at the Technological Institute of Tehuacán whose purpose was to learn from the experience of the actors the program to propose a strategy that would favor tutoring. The research was developed using a qualitative methodology, where information is obtained using instruments such as observation, interviews and surveys. This system seeks to favor the mentoring program in the achievement of its objectives and consequently in the achievement of the institutional goals of the Technological Institute of Tehuacán.
Análisis de una red colaborativa basado en el uso de un sistema informático que permite compartir auto en un ámbito universitario
Authors: Hernández-Pérez Marco Antonio , González-Silva Marco Antonio , Basurto-Flores Rogelio , Olvera-Mejía Yair Félix
Published: April 2021

A technological model that has had great growth is the linking of people through virtual groups created in digital media, also called social networks. This article presents an analysis of a collaborative social network whose design is based on the organizational structure of a university. By means of implementing a computer system that promotes a service of car sharing, and thus improve the transport conditions of its community, it is possible to find symmetrical and asymmetric relationships that they come of common user association rules in the university. Based on this study, the behavior of the network can be predicted thanks to the observed behavior patterns of users. These predictions are of great help in the planning of future activities where the network is expected to have certain collaborative behavior among its individuals when it comes to performing actions with a common benefit and achieve goals planned in the future.
Excerpt From Alejandro Aravena
Authors: Aravena Alejandro
Published: April 2021

The following text is an excerpt from the conference opening keynote address by architect Alejandro Aravena. Aravena, the recipient of the 2016 Pritzker Architecture Prize, artistic director of the 2016 Venice Architecture Biennale and Executive Director of elemental (Chile), proposed a new format for his keynote address. Instead of giving a lecture he held an unprecedented conversation with the audience. We could not capture this unique experience, but we have paraphrased a few fragments of this conversation in this text.