bluuebunny/crossref_metadata_2025_split huggingface dataset:
Juan Gris, ilustrador de Alma América de José Santos Chocano
Authors: Sarmiento Antonio 
Published: May 2021

Se sitúa la obra de Chocano en el contexto peruano para luego señalar su encuentro con Juan Gris; el pedido de estepara ilustrar Alma América y lo importante que significó en su carrera inicial de dibujante; también se dilucida el iniciode su seudónimo a través de varias hipótesis, para luego distinguir en los dibujos realizados una técnica precubista, y secierra con las conclusiones.
Poesía y periodismo: Aproximaciones en un diario de Lima
Authors: Alania Vera Jorge 
Published: May 2021

El presente trabajo trata de relacionar, a partir de una experiencia específica, al periodismo con la poesía. No esninguna novedad, pero no se hace a menudo por múltiples razones en los diarios: falta de espacio, desactualización ycontenido supuestamente elitista en medios dirigidos a las grandes masas y con recursos limitados como en el caso de los países en trance de desarrollo como el Perú. La experiencia comentada en el diario Expreso de Lima no essolo estimulante sino que puede marcar un camino que ojalá no se pierda en el horizonte.
Indicadores para evaluar la eficiencia de programas sociales. Una propuesta a partir de un Proyecto de Aprendizaje–Servicio entre alumnos de la Facultad de Derecho de la UNED y el Ayuntamiento de Madrid
Authors: González Rabanal Miryam C. 
Published: May 2021

Este trabajo recoge los resultados de un Proyecto de Aprendizaje–Servicio (ApS) vinculado con los Objetivos de Desarrollo Sostenible (ODS): 4, 10, 11, 12 y 16, desarrollado en el curso 2019–202 con estudiantes de la Facultad de Derecho de la UNED y el Ayuntamiento de Madrid.
Se ha seguido una metodología cualitativa y de meta–síntesis cualitativa.
El servicio del ApS consistió en la propuesta de 48 indicadores, agrupados en 5 categorías, para evaluar el Plan Operativo Contra la Trata y otros Abusos de Derechos Humanos en contextos de prostitución. El aprendizaje del Proyecto ha completado la formación de los alumnos sobre indicadores para evaluar programas sociales.
PSOAS ABSCESS – THE CHANGING TRENDS
Authors: Gayathre S. P. , N N. Shajini , Baskaran Aarthy 
Published: May 2021

Introduction: Psoas abscess (IPA) is an abscess collection in the retroperitoneal space tracking along the psoas major muscle. The microbial etiology of Psoas abscess is variable and depends on the geographical area. This study attempts to evaluate the microbial etiology, its implication in deciding the management modalities, and outcomes in patients with Psoas abscess from a tertiary care center in South India.
Materials and Methods: This was a retrospective study done in a tertiary care center in Southern India. Results: A total of 47 patients were enrolled in the study, with causative organism identified in 40 (85.15%) patients. In 17 patients (36.17%), it was found to be tuberculous origin; and of nontuberculous origin in 23 patients (48.93%). No causative organism could not be isolated in 7 patients (14.89%). While 33 patients were treated with percutaneous drainage (70.12%), open drainage was done in 14 patients (29.78%) and 1 patient died (2.12%).
Conclusion: The most common causative organism of psoas abscess is found to be of nontuberculous origin and PCD was found to be better modality of treatment. Empirical administration of anti-tuberculous drugs needs further evaluation.
Key words: psoas, retroperitoneal, retrospective, tuberculous, drainage, empirical
Katonai helikopterek múltja, jelene és jövője
Authors: Varga Béla 
Published: May 2021

A tervezők képzeletét a merevszárnyú repülőgépek fejlődésével párhuzamosan a forgószárnyas repülés lehetősége is megmozgatta. Bár négy évvel a Wright fivérek repülése után, 1907-ben felemelkedett az első helikopter is, még hosszú időnek kellett eltelnie az első gyakorlatban is használható helikopterek megszületéséig. Ennek fő oka az volt, hogy a helikopterrepülésre jellemző aszimmetrikus áramlási viszonyok, a forgószárny vezérlésének bonyolultsága és a reakciónyomaték kiegyensúlyozásának nehézségei sokáig megoldhatatlan feladatot jelentettek a tervezőknek. Az 1930-as években azonban az autogirókkal szerzett tervezési és repülési tapasztalatokkal egyre közelebb kerültek a helikopterrepülés gyakorlati problémáinak megoldásához. Az 1940-es években ezzel megkezdődhetett a repülés forgószárnyas korszaka, amit szélsebesen követett nagyszámú megjelenésük és széles körben való alkalmazásuk mind a polgári, mind a katonai repülés területén. Ebben a cikkben ezt a folyamatot szeretném bemutatni. A téma nagysága miatt természetesen csak egy-egy szelet bemutatására, a jelentősebb mérföldkövekre kitérve.
A pilóta nélküli légi járművek jövőbeli alkalmazási lehetőségeinek vizsgálata
Authors: Szalkai István , Ercsey Tamás Zsolt , Szép Károly 
Published: May 2021

A szerzők kutatásukban a pilóta nélküli légi járművek közszolgálati, illetve közszolgáltatási területen történő alkalmazhatóságát vizsgálják. Kitértek az eddigi alkalmazási területek vizsgálata mellett a jövőbeni alkalmazási területek trendeken nyugvó lehetőségeire is. Fő kérdésként arra keresték a választ, hogy melyek azok a kritikus infrastruktúrák vagy egyéb kiemelt célterületek, amelyek a pilóta nélküli légi járművekkel (UAV) üzemszerűen felügyelhetők, a mindennapi üzemeltetést támogatni tudják. A vizsgálat eredményeként célterületként azonosították a fotovoltaikus naperőműveket, az energiatermelésben részt vevő létesítményeket, illetve a hulladékgazdálkodási területet is. Előbbiek kiváló tesztterületei lehetnek a pilóta nélküli légi járművek üzemeltetésben és távfelügyeletben betöltött funkcióinak.
Gondolatok a légierő szervezeti és katonai vezetői kultúrájáról a Magyar Honvédségben
Authors: Szücs Péter 
Published: May 2021

A légierő szervezeti kultúrája nagyon sokrétű, és emiatt egy bonyolult rendszert alkot. A repülés kicsivel több mint 100 éves múltja tele van olyan állomással, amely azonnal hatást fejtett ki rá. A légierő szervezeti kultúrája nagyon erős, de ezzel együtt érzékenynek is kell lennie, hisz ezzel képes haladni és felvenni a versenyt azzal a rohanó technológiai fejlődéssel, ami a világban zajlik. A légierő komplexitása, speciális feladatrendszere, a vele szemben támasztott magas követelmények gyors fejlődése, a szabályok kötöttsége mind hatással vannak a benne szolgálatot teljesítőkre, és nagy kihívást jelent a katonai vezetőire. A szervezeti kultúrája olyan értékeket és hagyományokat őriz magában, amelyeknek a továbbörökítése mindig is feladat kell hogy legyen függetlenül attól, hogy hova is fejlődik. Ehhez a vezetőknek úgy kell a vezetői kultúrájukat alakítani, hogy hosszú távon fenntartható legyen ez az állapot, és a kitűzött cél elérése mindenki számára ugyanolyan fontos legyen.
Aktuális nemzetközi koczkázatkezelések a veszélyesáru-szállítások során
Authors: Pántya Péter , Majlingová Andrea 
Published: May 2021

A veszélyesáru-szállítás a kockázatos tevékenységekhez tartozik. Ezt a szállítmányozott anyag mellett az is indokolja, hogy nem lehetséges pontosan, előre meghatározni a veszélyes anyag kiszabadulásának helyszínét. A veszélyes áruk szállításával kapcsolatos kockázatok felmérésének és kezelésének, a kárfelszámolási beavatkozásoknak kérdése a tudomány és a kutatások aktuális témái közé tartozik nemzetközi szinten is. Jelen cikk összesíti az aktuális ismereteket a kérdéskörben, egy hasonló tanulmányon alapulva, valamint javaslatokat fogalmaz meg arra, hogyan fejleszthető a terület az ADR-járművek ellenőrzése és felügyelete kapcsán, mik az elérhető kárfelszámolási lehetőségek baleset esetén.
Diseño y validación de una escala de actitudes hacia personas con orientación homosexual: estudio con estudiantes universitarios
Authors: Castro Reyes Santiago , López Sierra Tania , Riveros Munévar Fernando 
Published: May 2021

OBJETIVO: Diseñar y validar una prueba psicométrica para la medición de actitudes de jóvenes universitarios colombianos hacia la homosexualidad. MÉTODO: Se llevó a cabo una revisión teórica para conformar los componentes de la escala, se elaboró la tabla de especificaciones y luego la construcción de los reactivos. Posteriormente. se realizó un proceso de validación de contenido por jueces expertos, se hicieron los ajustes correspondientes y se realizó la aplicación inicial con 200 participantes, obteniendo los análisis factoriales exploratorios y los análisis de confiabilidad, y luego la segunda aplicación a 179 estudiantes para obtener el análisis factorial confirmatorio. RESULTADOS: se obtuvo una escala con 18 ítems agrupados en cuatro factores que explican el 56,2% de la varianza total acumulada, con un modelo factorial que presenta adecuados índices de bondad de ajuste, un alfa de Cronbach de 0,926. DISCUSIÓN: se obtuvo una escala válida, confiable y consistente para evaluar las actitudes de estudiantes universitarios hacia la homosexualidad.
Phubbing, comunicación y calidad en la relación de pareja
Authors: Nina-Estrella Ruth , Montero-López Lena María , Manríquez Betanzos Juan Carlos 
Published: May 2021

El uso del teléfono celular puede desarrollar la conducta conocida como phubbing. Un fenómeno de la era digital que se define como el acto de ignorar a una persona por brindar atención al celular. El phubbing puede causar malestar en la relación de pareja que provoca conflictos y contribuye a la insatisfacción relacional. No obstante, es un tema escasamente estudiado en la cultura latinoamericana. Por lo que, el presente estudio tuvo el propósito de analizar la relación entre la conducta de phubbing, la comunicación tecnológica y la calidad de la relación en la cultura puertorriqueña. La muestra se compuso de 215 participantes en algún tipo de relación de pareja (noviazgo, matrimonio o en convivencia) con promedio de edad de 33 años. Se aplicaron tres escalas para medir las variables propuestas: comunicación tecnológica, phubbing y calidad diádica. Los datos fueron sometidos a diversos análisis estadísticos: análisis factorial confirmatorio, modelo estructural y análisis post-hoc. Los resultados obtenidos indican que el phubbing está presente en la pareja puertorriqueña. Los hallazgos muestran que el phubbing está relacionado positivamente con la comunicación tecnológica, mientras tiene un efecto negativo en la calidad de la relación de pareja. En contraste, la comunicación tecnológica no evidenció un efecto en la calidad de la relación. Los resultados indicaron la existencia de diferencias generacionales. Se concluye que la comunicación mediada por un celular cumple un rol significativo en el contexto de la pareja puertorriqueña que amerita continuar su estudio en futuras investigaciones.
Prognostic Implication of Liver Function Tests in Heart Failure With Preserved Ejection Fraction Without Chronic Hepatic Diseases: Insight From TOPCAT Trial
Authors: Liang Weihao , He Xin , Wu Dexi , Xue Ruicong , Dong Bin , Owusu-Agyeman Marvin , Zhao Jingjing , Cai Linnuan , You Zhiyao , Dong Yugang , Liu Chen 
Published: May 2021

Background: Liver dysfunction is prevalent in patients with heart failure (HF), but the prognostic significance of liver function tests (LFTs) remains controversial. Heart failure with preserved ejection fraction (HFpEF) had been introduced for some time, but no previous study had focused on LFTs in HFpEF. Thus, we aim to evaluate the prognostic significance of LFTs in well-defined HFpEF patients.Methods and Results: We conveyed a post-hoc analysis of the Treatment of Preserved Cardiac Function Heart Failure with an Aldosterone Antagonist Trial (TOPCAT). The primary outcome was the composite of cardiovascular mortality, HF hospitalization, and aborted cardiac arrest, and the secondary outcomes were cardiovascular mortality and HF hospitalization. In Cox proportional hazards models, aspartate transaminase (AST) and alanine transaminase (ALT) were not associated with any of the outcomes. On the contrary, increases in total bilirubin (TBIL) and alkaline phosphatase (ALP) were associated with increased risks of the primary outcome [TBIL: adjusted hazard ratio (HR), 1.17; 95% confidence interval (CI) 1.08–1.26; ALP: adjusted HR, 1.12; 95% CI 1.04–1.21], cardiovascular mortality (TBIL: adjusted HR, 1.16; 95% CI 1.02–1.31; ALP: adjusted HR, 1.16; 95% CI 1.05–1.28), and HF hospitalization (TBIL: adjusted HR, 1.22; 95% CI 1.12–1.33; ALP: adjusted HR, 1.12; 95% CI 1.03–1.23).Conclusion: Elevated serum cholestasis markers TBIL and ALP were significantly associated with a poor outcome in HFpEF patients without chronic hepatic diseases, while elevated ALT and AST were not.
Immunologic Rejection of Transplanted Retinal Pigmented Epithelium: Mechanisms and Strategies for Prevention
Authors: Petrash Carson C. , Palestine Alan G. , Canto-Soler M. Valeria 
Published: May 2021

Replacement of dysfunctional retinal pigmented epithelium (RPE) with grafts derived from stem cells has the potential to improve vision for patients with retinal disorders. In fact, the potential is such that a great number of groups are attempting to realize this therapy through individual strategies with a variety of stem cell products, hosts, immunomodulatory regimen, and techniques to assess the success of their design. Comparing the findings of different investigators is complicated by a number of factors. The immune response varies greatly between xenogeneic and allogeneic transplantation. A unique immunologic environment is created in the subretinal space, the target of RPE grafts. Both functional assessment and imaging techniques used to evaluate transplants are susceptible to erroneous conclusions. Lastly, the pharmacologic regimens used in RPE transplant trials are as numerous and variable as the trials themselves, making it difficult to determine useful results. This review will discuss the causes of these complicating factors, digest the strategies and results from clinical and preclinical studies, and suggest places for improvement in the design of future transplants and investigations.
Decidual Natural Killer Cells: A Good Nanny at the Maternal-Fetal Interface During Early Pregnancy
Authors: Liu Yuefang , Gao Shujun , Zhao Yangjing , Wang Hui , Pan Qiong , Shao Qixiang 
Published: May 2021

Decidual natural killer (dNK) cells are the tissue-resident and major subpopulation of NK cells at the maternal-fetal interface. It has been demonstrated that dNK cells play pivotal roles in pregnancy, including keeping maternal-fetal immune tolerance, promoting extravillous trophoblast (EVT) cell invasion, and driving uterine spiral artery remodeling. However, the molecular mechanisms haven’t been elucidated until recent years. In this review, we systemically introduce the generation, subsets, and surface or soluble molecules of dNK cells, which are critical for maintaining the functions of dNK cells. Further, new functions of dNK cells including well-controlled cytotoxicity, immunosurveillance and immunotrophism supporting via the cell-cell interaction between dNK cells and EVT cells are mainly focused. The molecular mechanisms involved in these functions are also illustrated. Moreover, pregnancy-associated diseases caused by the dNK cells abnormalities are discussed. It will be important for future investigations about the mechanism of maintenance of pregnancy and parturition and potential clinical applications of dNK cells.
Moderately Transparent Chitosan-PVA Blended Membrane for Strong Mechanical Stiffness and as a Robust Bio-Material Energy Harvester Through Contact-Separation Mode TENG
Authors: Cheedarala Ravi Kumar , Song Jung Il 
Published: May 2021

The detection of sustainable materials from naturally available resources using a simple fabrication process is highly important for novel research. Here, we used chitosan-PVA (Chs-PVA) blend films via layer-by-layer casting technologies for generating power through mechanical induction through triboelectric nanogenerators. The proposed Chs-PVA biodegradable film (i.e., thickness of 60 ± 5 μm) is facile, ecofriendly, highly flexible, mechanically strong, cost-effective, and easy to scale up. FT-IR analysis of the ChS-PVA blend membrane showed the strong interactions between the amines of ChS and hydroxyl groups of PVA through chemical cross-linking by hydrogen bonding. More importantly, the triboelectric nanogenerators (TENG) values of ChS-PVA films were 3–4 orders of magnitude lower than chitosan films reported before. Layer-on-layer cast films in particular exhibited high tensile strength (15.8 ± 1 MPa) and were more than three times stronger than other polyelectrolyte multilayer films. Both types of films remained stable in an acidic environment. Furthermore, the layer-on-layer-assembled films presented greater open circuit voltage (Voc) and short circuit current (Isc) values compared to pure ChS and PVA films. The ChS-PVA membrane can be used as a functional layer to produce charges by collecting get-up-and-go through vertical contact and separation mode TENG counters to the PVDF membrane. The enhancement of Voc and Isc of ChS-PVA TENG were 244 and 1,080% from ChS TENG. Where in the case of PVA TENG, the enhancement of Voc and Isc were increased by 633 and 2,888%, respectively due to the availability of free loan pair on the -NH2 and -OH functional groups. The novel ChS-PVA TENG is a potential candidate for satisfying the tight requirement of an optimized energy harvesting device as an alternate bio-material option for contact-separation mode TENGs.
Severe Psychopathology and Substance Use Disorder Modify the Association Between Housing Trajectories and Food Security Among Homeless Adults
Authors: Lachaud James , Mejia-Lancheros Cilia , Liu Michael , Wang Ri , Nisenbaum Rosane , Stergiopoulos Vicky , Hwang Stephen W. , O'Campo Patricia 
Published: May 2021

Purpose: We examined the housing trajectories of homeless people with mental illness over a follow-up period of 6 years and the association of these trajectories with food security. We then examined the modifying role of psychopathology and alcohol and substance use disorders in this association.Materials and Methods: We followed 487 homeless adults with mental illness at the Toronto site of the At Home/Chez-Soi project—a randomized trial of Housing First. Food security data were collected seven times during the follow-up period. Psychopathology (Colorado Symptom Index score) and alcohol and substance use disorders were assessed at baseline. Housing trajectories were identified using group-based trajectory modeling. Logistic regression was used to estimate the association between housing trajectory groups and food security.Results: Three housing trajectory groups were identified: rapid move to consistent stable housing (34.7%), slow and inconsistent housing (52.1%), and never moved to stable housing (13.2%). Individuals included in the rapid move to consistent housing trajectory group had higher odds of remaining food secure compared with those in the never moved to stable housing trajectory group over the follow-up period [AOR 2.9, 95% CI: 1.3–6.6, P-value: 0.009]. However, when interactions were considered, this association was significant among those with moderate psychopathology but not severe psychopathology. Individuals with substance use disorder and in the never moved to stable housing group had the lowest food security status.Discussion: Severe psychopathology and substance use disorders modified the association between housing trajectories and food security.International Standard Randomized Control Trial Number Register (ISRCTN42520374).
Prognostic and Clinicopathological Value of Human Leukocyte Antigen G in Gastrointestinal Cancers: A Meta-Analysis
Authors: Peng Yongjia , Xiao Jian , Li Wenyun , Li Shuna , Xie Binbin , He Jiang , Liu Chaoqun 
Published: May 2021

BackgroundThe prognostic value of human leukocyte antigen G (HLA-G) expression in gastrointestinal (GI) cancers remains controversial. Thus, this meta-analysis aimed to summarize available evidence from case-control or cohort studies that evaluated this association.MethodsThe PubMed, EMBASE, Cochrane Library, and Web of Science databases were searched to identify relevant studies written in English published up to April 1, 2021, and with no initial date. Furthermore, the Google Scholar and Google databases were also searched manually for gray literature. The protocol for this meta-analysis was registered at PROSPERO (CRD42020213411). Pooled hazard ratios (HRs) or odds ratios (ORs) and 95% confidence intervals (CIs) were estimated for end points using fixed- and random-effects statistical models to account for heterogeneity. Publication bias was evaluated using a funnel plot, Begg’s and Egger’s tests, and the “trim and fill” method.ResultsA total of 30 eligible articles with 5737 unique patients, including 12 studies on colorectal cancer (CRC), 6 on gastric cancer (GC), 5 on esophageal cancer (ESCC), 5 on hepatocellular carcinoma (HCC), and 2 on pancreatic adenocarcinoma (PC), were retrieved. Both univariate (HR = 2.01, 95% CI: 1.48 ~ 2.72) and multivariate (HR = 2.69, 95% CI: 2.03 ~ 3.55) analyses revealed that HLA-G expression was significantly correlated with poor overall survival (OS), regardless of the cancer type or antibody used. Subgroup analysis stratified by antibody showed that the 4H84 (I2 = 45.8%, P = 0.101) antibodies could be trustworthy and reliable for detecting HLA-G expression in GI cancers. In addition, HLA-G expression was found to be correlated with adverse clinicopathological parameters such as clinical stage, nodal status, metastasis, and histological grade but not tumor status.ConclusionElevated HLA-G expression indicates a poor prognosis for GI cancer patients, and screening for this marker could allow for the early diagnosis and treatment of GI cancers to improve survival rates.