bluuebunny/crossref_metadata_2025 huggingface dataset:
On the number of positive solutions to an indefinite parameter-dependent Neumann problem
Authors: Feltrin Guglielmo , Sovrano Elisa , Tellini Andrea
Published: July 2021

We study the second-order boundary value problem

   \begin{document}$ \begin{equation*} \begin{cases}\, -u'' = a_{\lambda,\mu}(t) \, u^{2}(1-u), & t\in(0,1), \\\, u'(0) = 0, \quad u'(1) = 0,\end{cases} \end{equation*} $\end{document}

where \begin{document}$ a_{\lambda,\mu} $\end{document} is a step-wise indefinite weight function, precisely \begin{document}$ a_{\lambda,\mu}\equiv\lambda $\end{document} in \begin{document}$ [0,\sigma]\cup[1-\sigma,1] $\end{document} and \begin{document}$ a_{\lambda,\mu}\equiv-\mu $\end{document} in \begin{document}$ (\sigma,1-\sigma) $\end{document}, for some \begin{document}$ \sigma\in\left(0,\frac{1}{2}\right) $\end{document}, with \begin{document}$ \lambda $\end{document} and \begin{document}$ \mu $\end{document} positive real parameters. We investigate the topological structure of the set of positive solutions which lie in \begin{document}$ (0,1) $\end{document} as \begin{document}$ \lambda $\end{document} and \begin{document}$ \mu $\end{document} vary. Depending on \begin{document}$ \lambda $\end{document} and based on a phase-plane analysis and on time-mapping estimates, our findings lead to three different (from the topological point of view) global bifurcation diagrams of the solutions in terms of the parameter \begin{document}$ \mu $\end{document}. Finally, for the first time in the literature, a qualitative bifurcation diagram concerning the number of solutions in the \begin{document}$ (\lambda,\mu) $\end{document}-plane is depicted. The analyzed Neumann problem has an application in the analysis of stationary solutions to reaction-diffusion equations in population genetics driven by migration and selection.
Landscape management and economic evaluation of the ecosystem services of the vineyards
Authors: Sgroi Filippo ,   Department of Agricultural, Food and Forestry Sciences, University of Palermo, Palermo 90128, Italy
Published: July 2021

The contribution aims to highlight the relationship between the business economy applied to viticulture and the ecosystem. The concepts of ecosystem services and viticultural biodiversity are seen in order to provide a new perspective for the development of a more sustainable business management. The work contributes to enriching the economic literature by introducing the relationship between ecosystem and business. The new perspective helps to place the company within the wider ecological-social system, favoring a more consistent interpretation of the relationship of exchange (impact and dependence) of resources with nature. The work proposes a methodology for calculating the ecosystem service rendered by the vineyards cultivated in the Sicilian hills. The conceptual scheme and the methodology adopted highlight the value of the ecosystem service. Certainly, for the future, it is necessary to create business models where ecosystem services find a remuneration as the entrepreneur is led to adopt cultivation practices in this sense only if he finds a remuneration from the public or private sector. Ecosystem services are important to protect the landscape and the environment. The paper proposes a land management method that respects the environmental balance. This approach leads to long-term value creation at both the micro and macroeconomic levels.
Implicative ideals of BCK-algebras based on MBJ-neutrosophic sets
Authors: Takallo M. Mohseni ,   Department of Mathematics, Shahid Beheshti University, Tehran, Iran, Borzooei Rajab Ali , Song Seok-Zun , Jun Young Bae ,   Department of Mathematics, Jeju National University, Jeju 63243, Korea,   Department of Mathematics Education, Gyeongsang National University, Jinju 52828, Korea
Published: July 2021

The MBJ-neutrosophic set is applied to the implicative ideal of BCK-algebra to introduce the concept of implicative MBJ-neutrosophic ideal. Several properties are investigated. The relationship between implicative MBJ-neutrosophic ideal and each MBJ-neutrosophic subalgebra, (positive implicative, commutative) MBJ-neutrosophic ideal is established. Conditions for MBJ-neutrosophic subalgebra (resp., MBJ-neutrosophic ideal, positive implicative MBJ-neutrosophic ideal and commutative MBJ-neutrosophic ideal) to be implicative MBJ-neutrosophic ideal are provided. Characterizations of implicative MBJ-neutrosophic ideal are discussed.
A novel scheme for multivariate statistical fault detection with application to the Tennessee Eastman process
Authors: Xu Nana , Sun Jun , Liu Jingjing , Xiu Xianchao
Published: July 2021

Canonical correlation analysis (CCA) has gained great success for fault detection (FD) in recent years. However, it cannot preserve the prior information of the underlying process. To cope with these difficulties, this paper proposes an improved CCA-based FD scheme using a novel multivariate statistical technique, called sparse collaborative regression (SCR). The core of the proposed method is to take the prior information as a supervisor, and then integrate it with CCA. Further, the \begin{document}$ \ell_{2,1} $\end{document}-norm is employed to reduce redundancy and avoid overfitting, which facilitates its interpretability. In order to solve the proposed SCR, an efficient alternating optimization algorithm is developed with convergence analysis. Finally, some experimental studies on a simulated example and the benchmark Tennessee Eastman process are conducted to demonstrate the superiority over the classical CCA in terms of the false alarm rate and fault detection rate. The detection results indicate that the proposed method is promising.
Hardy type inequalities for the fractional relativistic operator
Authors: Roncal Luz ,   BCAM - Basque Center for Applied Mathematics 48009 Bilbao, Spain,   Ikerbasque, Basque Foundation for Science, 48011 Bilbao, Spain,   Universidad del País Vasco/Euskal Herriko Unibertsitatea, 48080 Bilbao, Spain
Published: July 2021

We prove Hardy type inequalities for the fractional relativistic operator by using two different techniques. The first approach goes through trace Hardy inequalities. In order to get the latter, we study the solutions of the associated extension problem. The second develops a non-local version of the ground state representation in the spirit of Frank, Lieb, and Seiringer.
Evaluation of the long-term compressive strength development of the sewage sludge ash/metakaolin-based geopolymer
Authors: Istuque D. , Soriano L. , Borrachero M.V. , Payá J. , Akasaki J.L. , Melges J.L.P. , Tashima M.M.
Published: July 2021

This paper aimed to evaluate the long-term compressive strength development of the sewage sludge ash/metakaolin (SSA/MK)-based geopolymer. SSA/MK-based geopolymeric mortars and pastes were produced at 25ºC with different SSA contents (0 - 30 wt.%). Compressive strength tests were run within the 3-720 curing days range. A physicochemical characterisation (X-ray diffraction and scanning electron microscopy) was performed in geopolymeric pastes. All the geopolymeric mortars presented a compressive strength gain with curing time. The mortars with all the SSA evaluated contents (10, 20, 30 wt.%) developed a compressive strength over 40 MPa after 720 curing days at 25ºC. The maximum compressive strength of the mortars with SSA was approximately 61 MPa (10 wt.% of SSA), similarly to the reference mortar (100% MK-based geopolymer). The microstructure analyses showed that the SSA/MK-based geopolymer presented a dense microstructure with N-A-S-H gel formation.
«La Inquisición no conoce de nosotros los indios». Fiesta y escándalo en el Corpus Christi
Authors: Zinni Mariana C.
Published: July 2021

En 1661, durante la fiesta del Corpus Christi en la doctrina de Ambar, en ausencia del cura doctrinero, se produjeron una serie de episodios catalogados como idolátricos, llevados a cabo por los naturales del pueblo, que incluyeron la celebración de una falsa misa, la unión en matrimonio de una pareja de hombres disfrazados y el bautizo del fruto de tal unión. En este artículo propongo una lectura de estos incidentes con el propósito de estudiar el accionar de un grupo de individuos que ostentaban distintos grados sociales y acceso al poder —el sacristán indio, el curaca, el falso celebrante—, quienes se valieron de esta ocasión para socavar la autoridad del cura doctrinero ante el tribunal eclesiástico, creyendo quedar fuera del alcance del mismo por su condición de indios. Sin embargo, nada salió como lo planearon y los eventos culminaron de manera muy diferente.
Caudales americanos y consulado francés en Galicia durante el período bélico de 1743 a 1749
Authors: Cebreiro Ares Francisco
Published: July 2021

En este estudio se facilita la nómina de buques y cargamentos de caudales que arribaron a las costas gallegas entre 1743 y 1749 utilizando como fuente privilegiada la correspondencia del cónsul francés destinado en Galicia, y radicado en el puerto de A Coruña, que se conserva en los Archives Nationales (París). A partir de esta información, se realizan varias consideraciones sobre las series globales de llegadas de caudales americanos durante el periodo, así como sobre la interpretación de los mecanismos y personajes que participaron en esta «fase galaica» de los metales preciosos.
Fatores motivacionais na aprendizagem de Português Língua Estrangeira na China
Authors: João Pires Manuel
Published: July 2021

Os fatores motivacionais desempenham um papel determinante no sucesso da aprendizagem da língua estrangeira por parte dos estudantes e são essenciais também para que os professores possam compreender melhor e dar uma resposta mais eficiente às necessidades de aprendizagem dos alunos. Este artigo tem como objetivo analisar a influência de alguns fatores motivacionais que envolvem o percurso dos estudantes chineses na aprendizagem de português. Para este fim, foi ouvida a voz dos estudantes de Português da Universidade de Sun Yat-sen, situada na província chinesa de Cantão, com recurso a questionários e entrevistas. Os resultados revelam o predomínio da motivação instrumental na decisão de estudar português, além da influência que os fatores externos (meio social, família, etc.), a figura do professor, as questões de personalidade e o tipo de conteúdos abordados nas aulas possuem na relação dos estudantes com a aprendizagem de português.
Paraneoplastic dermatomyositis and prostate cancer: myopathy regression under cancer-directed therapy
Authors: Miranda Baleiras Mafalda , Maduro Luís , Vasques Carolina , Ferreira Filipa , Mesquita Pinto Marta , Martins Ana
Published: July 2021

Prostate cancer is the second most frequent malignancy in men worldwide and the fifth leading cause of death. Dermatomyositis (DM) is a rare idiopathic inflammatory myopathy characterized by musculocutaneous manifestations. However, DM can also present as a paraneoplastic syndrome of an underlying neoplasm. We report a case of a 65-year-old man diagnosed with prostate adenocarcinoma in the setting of severe dysphagia, muscle weakness and a facial erythematous rash. At first, the DM-related symptoms resolved with the initial treatment for the underlying malignancy. Yet, they flared up as the tumor progressed. To sum up, DM is a rare systemic disorder with unknown etiology. There is a well-established association between DM and malignancy. Malignancy-headed therapy can improve DM manifestations and the recurrence of DM symptoms may act as an early warning of malignancy relapse.
Empowerment e cura centrata sulla persona: un progetto d’educazione terapeutica dedicato al paziente affetto da ulcere venose. Studio p
Authors: Feliziani Katia , Dichiara Arianna , Faccenda Giovanna , Romanelli Marco , Paggi Battistino
Published: July 2021

Il progetto ha previsto lo sviluppo, la validazione e la sperimentazione di uno strumento formativo cartaceo dedicato al paziente seguito presso l’ambulatorio infermieristico per ulcere venose dell’arto inferiore. Un infermiere esperto in wound care ha progettato e, in seguito, sottoposto a validazione da parte di un team multiprofessionale un questionario composto da 5 domande concernenti la consapevolezza di malattia, la necessità di essere sottoposti a terapia e la verifica delle conoscenze di alcuni basilari concetti di fisiopatologia. Il questionario è stato somministrato ai pazienti arruolati prima e dopo l’intervento formativo attuato, al fine di testarne l’efficacia (studio pre-post test senza gruppo di controllo). L’analisi dell’efficacia dell’intervento formativo è stata effettuata testando la variazione della media dei punteggi pre (Pre-I) e post intervento (Post-I). Risultati: in base all’analisi statistica effettuata è possibile ritenere l’intervento formativo efficace per il campione selezionato con un buon livello di significatività (p<0,001): media dei punteggi Pre-I 6,22 (95% IC 5,22-7,21) e media Post-I 10,83 (95% IC 10,59-11,06). In linea con quanto presente in letteratura scientifica, lo studio condotto ha permesso all’infermiere esperto in wound care di sperimentare l’effetto della personalizzazione dell’intervento di cura e dell’empowerment sull’outcome. L’intervento formativo, così strutturato, pur risultando perfettibile, rappresenta un importante punto di partenza per ulteriori sviluppi futuri.
Pain Variability and Subjective Function in Individuals With Patellofemoral Pain: A Short Report
Authors: Glaviano Neal R. , Simon Mikayla M. , Bazett-Jones David M.
Published: July 2021

Individuals with patellofemoral pain (PFP) experience discomfort during various functional activities. Long-term pain is a common consequence of PFP, yet little is known about daily pain variability. Our study consisted of 25 individuals with PFP who completed the Anterior Knee Pain Scale (AKPS) and recorded their daily pain over 10 days. Pain was evaluated using 2 measures of intensity (baseline pain, 10-day average pain) and 2 measures of variability (mean square of successive differences, probability of acute change). Associations between AKPS and the 4 pain measures were calculated with Pearson correlations. We calculated a linear regression to examine the amount of variance in the AKPS explained by the 4 pain measures. Greater mean square of successive differences values were moderately associated with lesser AKPS scores (r = −0.648, P < .001). Mean square of successive differences and 10-day averaged pain were the strongest predictors of AKPS (R2 = 0.565, P < .001). Pain variability provided a unique perspective on the pain experience and predicted patient-oriented function in individuals with PFP.
Cortical Motor Planning and Biomechanical Stability During Unplanned Jump Landings in Men With Anterior Cruciate Ligament Reconstruction
Authors: Giesche Florian , Vieluf Solveig , Wilke Jan , Engeroff Tobias , Niederer Daniel , Banzer Winfried
Published: July 2021

Context

Athletes with anterior cruciate ligament (ACL) reconstruction (ACLR) exhibit increased cortical motor planning during simple sensorimotor tasks compared with healthy athletes serving as control groups. This may interfere with proper decision making during time-constrained movements, elevating the reinjury risk.

Objective

To compare cortical motor planning and biomechanical stability during jump landings between participants with ACLR and healthy individuals.

Design

Cross-sectional study.

Setting

Laboratory.

Patients or Other Participants

Ten men with ACLR (age = 28 ± 4 years, time after surgery = 63 ± 35 months) and 17 healthy men (age = 28 ± 4 years) completed 43 ± 4 preplanned (landing leg shown before takeoff) and 51 ± 5 unplanned (visual cue during flight) countermovement jumps with single-legged landings.

Main Outcome Measure(s)

Movement-related cortical potentials (MRCPs) and frontal θ frequency power before the jump were analyzed using electroencephalography. Movement-related cortical potentials were subdivided into 3 successive 0.5-second time periods (readiness potential [RP]-1, RP-2, and negative slope [NS]) relative to movement onset, with higher values indicating more motor planning. Theta power was calculated for the last 0.5 second before movement onset, with higher values demonstrating more focused attention. Biomechanical landing stability was measured via peak vertical ground reaction force, time to stabilization, and center of pressure.

Results

Both the ACLR and healthy groups evoked MRCPs at all 3 time periods. During the unplanned task analyzed using P values and Cohen d, the ACLR group exhibited slightly higher but not different MRCPs, achieving medium effect sizes (RP-1: P = .25, d = 0.44; RP-2: P = .20, d = 0.53; NS: P = .28, d = 0.47). The ACLR group also showed slightly higher θ power values that were not different during the preplanned (P = .18, d = 0.29) or unplanned (P = .42, d = 0.07) condition, achieving small effect sizes. The groups did not differ in their biomechanical outcomes (P values > .05). No condition × group interactions occurred (P values > .05).

Conclusions

Our jump-landing task evoked MRCPs. Although not different between groups, the observed effect sizes provided the first indication that men with ACLR might have consistently relied on more cortical motor planning associated with unplanned jump landings. Confirmatory studies with larger sample sizes are warranted.
2021 Clinical Practice Guidelines for Diabetes Mellitus of the Korean Diabetes Association
Authors: Hur Kyu Yeon , Moon Min Kyong , Park Jong Suk , Kim Soo-Kyung , Lee Seung-Hwan , Yun Jae-Seung , Baek Jong Ha , Noh Junghyun , Lee Byung-Wan , Oh Tae Jung , Chon Suk , Yang Ye Seul , Son Jang Won , Choi Jong Han , Song Kee Ho , Kim Nam Hoon , Kim Sang Yong , Kim Jin Wha , Rhee Sang Youl , Lee You-Bin , Jin Sang-Man , Kim Jae Hyeon , Kim Chong Hwa , Kim Dae Jung , Chun SungWan , Rhee Eun-Jung , Kim Hyun Min , Kim Hyun Jung , Jee Donghyun , Kim Jae Hyun , Choi Won Seok , Lee Eun-Young , Yoon Kun-Ho , Ko Seung-Hyun ,   Committee of Clinical Practice Guidelines, Korean Diabetes Association
Published: July 2021

The Committee of Clinical Practice Guidelines of the Korean Diabetes Association (KDA) updated the previous clinical practice guidelines for Korean adults with diabetes and prediabetes and published the seventh edition in May 2021. We performed a comprehensive systematic review of recent clinical trials and evidence that could be applicable in real-world practice and suitable for the Korean population. The guideline is provided for all healthcare providers including physicians, diabetes experts, and certified diabetes educators across the country who manage patients with diabetes or the individuals at the risk of developing diabetes mellitus. The recommendations for screening diabetes and glucose-lowering agents have been revised and updated. New sections for continuous glucose monitoring, insulin pump use, and non-alcoholic fatty liver disease in patients with diabetes mellitus have been added. The KDA recommends active vaccination for coronavirus disease 2019 in patients with diabetes during the pandemic. An abridgement that contains practical information for patient education and systematic management in the clinic was published separately.
Effectiveness of a combined obesity prevention program in South Korea for children from low-income families that included primary caregiver participation
Authors: Park Namhee , Im Mihae
Published: July 2021

Purpose: Obesity among children from low-income families is becoming a social problem. The aim of this study was to evaluate the effectiveness of an obesity prevention program that included physical activity, nutrition education, behavioral modification, and primary caregiver participation components among children from low-income families.Methods: The study analyzed a nonequivalent control group using a pretest-posttest design. A total of 77 children were recruited from six community childcare centers using purposive sampling. For the intervention group (n=40), the pretest was administered before the combined intervention program involving the participants' primary caregivers was conducted for 8 weeks. The posttest was conducted immediately after the program and again four weeks after the program.Results: Flexibility (F=4.64, p=.020), muscular endurance (F=11.22, p<.001), nutritional knowledge scores (F=4.79, p=.010), body image satisfaction scores (F=4.74, p=.012), and self-esteem scores (F=3.81, p=.029) showed significant differences and interactions between group and time for the intervention and control groups.Conclusion: Strategies to actively engage the primary caregivers of low-income families in children's obesity programs are needed. Obesity prevention programs for children based on the program in this study should be routinely developed, and continuing attention should be given to children from low-income families.
The Let’s Eat Healthy and Move at School program for adolescents in South Korea: Program design, implementation, and evaluation plan using intervention mapping
Authors: Park Jiyoung , Ten Hoor Gill A. , Baek Seolhyang , Chung Sochung , Kim Yang-Hyun , Hwang Gahui
Published: July 2021

Purpose: This study aimed to systematically develop an obesity prevention program for adolescents to promote healthy eating and physical activity in schools.Methods: The development of the Let's Eat Healthy and Move at School program for adolescents followed the six steps of intervention mapping (IM). IM is a widely used protocol for developing systematic and effective interventions based on theories and evidence.Results: To better understand the problem and identify the needs of adolescents, interviews were conducted with teachers, school nurses, and students (step 1). In step 2, the desired behaviors and their determinants were established and combined into a matrix comprising 16 change objectives. In step 3, theoretical methods such as persuasive communication and consciousness-raising were chosen. The program was segmented into three educational activity sessions in step 4. In step 5, an implementation manual was developed for program instructors to ensure effective and accurate implementation. Finally, practices for evaluating the program's effectiveness and procedures were designed in step 6.Conclusion: The Let’s Eat Healthy and Move at School program will provide adolescents with guidelines to promote healthy living and prevent obesity in everyday life using strategies for sustainable adolescent obesity prevention and management.
Translation and psychometric evaluation of the Korean version of the fertility awareness and attitudes towards parenthood questionnaire
Authors: Shin Hyewon , Hong Minjoo , Jo Minjeong , Lee Jungmin
Published: July 2021

Purpose: This study presents a translation, cultural adaptation, and psychometric evaluation of two instruments of the Fertility Awareness and Attitudes Towards Parenthood (FAAP) questionnaire (Conditions and Life changes) for use in South Korea.Methods: This methodological study included 166 university students for psychometric evaluation in the sixth step. The first five steps included forward translation, backward translation, committee review, assessment of content validity, and a pre-test. In the sixth step, psychometric properties, including internal consistency, construct validity, and criterion validity, were evaluated. Exploratory factor analysis and confirmatory factor analysis were conducted to identify the structure of the tool and to assess its validity.Results: The Korean version showed acceptable internal consistency. Cronbach's ⍺ was .73 for FAAPC-conditions and .83 for FAAP-Life changes. FAAP-Conditions showed a four-factor structure (social conditions, relationship with partner, external environment, and child-rearing support) and FAAP-Life changes had a two-factor structure (reward and burden). In the confirmatory analysis, CMIN/DF, TLI, IFI, SRMR, CFI, and RMSEA were satisfactory.Conclusion: This study provided preliminary evidence of the acceptability, reliability, and validity of the Korean version of the FAAP questionnaire in university students in South Korea. Nonetheless, further evaluation among Korean young adults is warranted to validate this instrument.
Factors influencing the quality of nursing care as perceived by mothers of hospitalized children in South Korea
Authors: Jin Ina , Cho Hun Ha
Published: July 2021

Purpose: This study aimed to identify the factors affecting the quality of nursing care as perceived by mothers of hospitalized children and provide basic data for the development of nursing care quality improvement programs.Methods: The participants consisted of 167 mothers, each of whom had a child hospitalized at a specific children's hospital. Data were collected from June 22 to August 8, 2019.Results: The factors that affected how mothers perceived the quality of nursing care were the communication ability of nurses (β=.44, p<.001) and the mother-nurse partnership (β=.33, p=.001). The total explanatory power of these factors was 54.1%.Conclusion: To improve the quality of pediatric nursing care, it is necessary to improve the communication abilities of nurses and to promote partnership between nurses and the mothers of hospitalized children.
The Contribution of Co-Operative Education in the growing of talent in South Africa: A Qualitative Phenomenological Exploration
Authors: Groenewald Thomas , Schurink Willem
Published: July 2021

Organisational talent is internationally regarded a key success factor in a competitive world and is continuously challenged. In South Africa, the Apartheid heritage further presents major challenges regarding developmental opportunities of talented people. Co-operative education presents, as structured educational strategy that progressively integrates academic study with learning through productive work experiences, itself as a means to grow the talent of the South African people. As result of the inadequate practice of co-operative education and a fair amount of associated resistance, ‘classical’ literature is reviewed. The literature review further identifies the core properties of co-operative education and the study has attempted to distil the core principles of a phenomenological research design. The specific ‘phenomena’ which the research focused on are existing joint ventures between Higher Education institutions and business enterprises aimed at educating people and growing talent. Selections of the voices of the research participants are presented in this article. Although the present study identifies several shortcomings regarding the practice of co-operative education, it pioneers the notion that the growing of talent can be enhanced through a co-operative education strategy.
Symmetrical Peripheral Gangrene
Authors: Kumar Ashok , Khan Urvashi , Bansal Shivani
Published: July 2021

Symmetrical peripheral gangrene (SPG) is a rare syndrome which is defined by the peripheral ischemic lesion of two or more extremities in the absence of major vascular obstructive disease. We hereby describe a case of 63-year-old female, admitted in intensive care unit with a history of shortness of breath with atrial fibrillation since few days, developed cold extremity with acrocyanosis that rapidly progressed to gangrene. Laboratory analysis revealed increased inflammatory parameters, deranged liver enzymes, thrombocytopenia, and prolonged coagulation time. Patient developed septic shock and was started on intravenous vasopressor with clinical benefits. Even though there is no consensus regarding SPG treatment, consequences should be mitigated, particularly when vasopressor are used, in order to avoid major amputation. Most of the sepsis survivors with SPG require amputation of the affected extremities.
Sclerocornea - A rare manifestation of full trisomy 13
Authors: Ganatra Snehal , Shetty Shashikant , Vijayalakshmi P.
Published: July 2021

Patau syndrome when caused by attachment of an extra chromosome with chromosome 13 is called as full trisomy 13. It is caused by nondisjunction of chromosomes during meiosis. The extra chromosome disrupts normal development, causing multiple and complex organ defects. Children with trisomy 13 are born full term, but they rarely live more than a few days or weeks. Our patient was a 1-year-old female child who presented with various typical and atypical ocular and systemic findings of full trisomy 13. Her karyotyping showed the presence of an extra copy of chromosome 13. Anterior segment dysgenesis is known to occur with Patau's syndrome, but sclerocornea as a manifestation of full trisomy 13 has not been reported prior.
Epidemiology, clinical profile, and pattern of refractive error in newly diagnosed cases of refractive error in pediatric population visiting a tertiary eye care center
Authors: Rajput Vimal Krishna , Shetty Naren , Raut Pritish
Published: July 2021

Purpose:

This study aimed to evaluate the epidemiology, clinical profile, and pattern of refractive error in newly diagnosed cases in children visiting a tertiary care eye center in southern India.

Materials and Methods:

This prospective study was conducted on 367 children, ≤15 years of age, with significant refractive error who visited our tertiary eye care hospital over a period of 1 year. Every child underwent detailed ocular examination. Significant refractive error was defined as myopia of ≥−0.75 diopter (D), hypermetropia of more than +2 D, and astigmatism of more than 0.75 D. Descriptive statistics were computed for better and the worse eye. Statistical tests were applied between the worse and better eyes using Chi-square test.

Results:

A total of 367 children (38.8%) were diagnosed for the first time of having refractive error. Only 146 (39.8%) children presented with visual complaints. With respect to the vision in the worse eye, 65.9% (n = 240) had moderately subnormal vision. There was no statistically significant difference (P = 0.057) between age distribution and visual acuity in the worse eye. Two hundred and thirty-eight children (64.9%) had significant astigmatism as compared to 161 myopic (43.9%) children. There was a statistically significant difference between reasons of visit and different age groups.

Conclusions:

Astigmatism was the most prevalent refractive error and uncorrected astigmatism the most significant amblyogenic factor. Since majority of children, especially in the younger age group, present with nonvisual complaints, involvement of pediatricians and parents will help us to reduce morbidity due to uncorrected refractive error and amblyopia.
Validation of absolute point dosimetry by the analytical anisotropic algorithm and Acuros XB algorithm employing intensity-modulated radiotherapy technique on an in-house develop cost-effective heterogeneous thorax phantom
Authors: Bagdare Priyusha , Dubey Swati , Ghosh Sanjay
Published: July 2021

Introduction:

Dose validation inside the human body needs a medium which can simulate the actual heterogeneities of a specific body site. The aim of the present work is to study the properties of a cost-effective heterogeneous thorax phantom (HTP) developed in-house by the author and its application for the evaluation of patient-specific absolute point dosimetry by employing analytic anisotropic algorithm (AAA) and Acuros XB (AXB) algorithm.

Materials and Methods:

HTP was made from the dust of porous pinewood, rib cage, and honeybee's wax. Density and central axis isodose depth distribution was measured on computed tomography images of actual patient and on HTP. Absolute point dose verification of 35 patients was done using AAA and AXB algorithm. The difference in the calculated dose by AAA and AXB was compared using the Wilcoxon signed-rank test.

Results:

Density distribution and central axis depth dose inside the HTP compare well with that of an actual patient. The mean percentage variation between the planned and the measured doses inside the HTP was found to be 4.85 (standard deviation [SD] = 3.38) and 1.3 (SD = 2.93), respectively, using AAA and AXB algorithm. The difference in the measured dose and the planned dose was found to be significant for AAA with the significance level of 0.01 (p-value < 0.00001), whereas it was found to be insignificant (p-value < 0.00001) for AXB.

Conclusion:

The results of this study showed that the HTP is resembled with the human thorax in terms of its heterogeneities and radiological properties and can be used for pretreatment plan verification.
Immunohistochemical subtyping of diffuse large B-cell lymphoma into germinal center B-cell and activated B-cell subtype, along with correlation of the subtypes with extranodal involvement, serum lactate dehydrogenase, and positron emission tomography scan-based response assessment to chemotherapy
Authors: Tyagi Aarti , Abrari Andleeb , Khurana Anuj , Tyagi Shantanu
Published: July 2021

Context:

Diffuse large B-cell lymphoma (DLBCL) is the most common type of non-Hodgkin lymphoma in Indian population and is divided into the prognostically important subtypes, germinal center B-cell (GCB) and activated B-cell-like (ABC), using immunohistochemistry-based algorithm.

Aim:

The present study aims to evaluate the influence of immunohistochemical derived DLBCL subtype, GCB or ABC on prognostically significant variables – extranodal involvement and serum lactate dehydrogenase (LDH) level at presentation, and response to chemotherapy assessed on pre- and posttreatment fluorodeoxyglucose-positron emission tomography study.

Settings and Design:

This was a retro-prospective, 2-year observational study at a tertiary health-care center, New Delhi.

Subjects and Methods:

The study population includes a total 236 cases of DLBCL. According to the Hans algorithm, DLBCL cases were allocated to the GCB and ABC subgroups.

Statistical Analysis Used:

For comparison of mean values, independent t-test and analysis of variance were used. For this purpose, we used SPSS 20.0 software. P < 0.05 was considered as statistically significant.

Results:

Ninety-eight patients (41.5%) had GCB immunophenotype and 138 patients (58.5%) were ABC. A significant difference was observed between mean baseline level of LDH between GCB and ABC subtypes (P < 0.05). The proportion of cases with extranodal involvement was comparatively higher in ABC subtype (P < 0.05). Association between response to chemotherapy with DLBCL immunophenotypes was found to be highly significant (P < 0.00). The response rates were much better in GCB subtype.

Conclusions:

The mean baseline level of LDH is significantly higher in ABC subtype. The proportion of cases with extranodal involvement was comparatively higher in ABC and shows poor response to chemotherapy as compared to GCB. Baseline LDH level was found to be important prognostic marker in the DLBCL.
COVID-19 Outbreak
Authors: Patel Vishalkumar Kanaiyalal , Pandey Sunayna , Jani Arpit Madhusudanbhai , Tiwari Deepak Sachidanand , Patel Falguni Babubhai , Amritlal Thakrar Rajendra Kumar
Published: July 2021

Context:

COVID-19 outbreak has had a huge impact on health-care facilities, and challenges of health-care providers would compromise their physical and mental well-being during this epidemic.

Aims:

This study aimed to find out stress, anxiety, insomnia, and depression among the health-care workers during COVID-19 outbreak.

Settings and Design:

This was a 3-month, cross-sectional, observational, single-center study of health-care workers of designated COVID-19 hospital.

Subjects and Methods:

Study objectives were explained to health-care workers, and written consent was obtained. Participants were approached in their department as per their convenience and requested to fill the pro forma. Depression, Anxiety, and Stress Scale-21 and Insomnia Severity Index were used to detect psychological issues in the form of stress, anxiety, insomnia, and depression.

Statistical Analysis:

Descriptive statistics and Chi-square test were used for analysis of variables in the study.

Results:

Overall 27.41% and 29.18% of the health-care workers reported stress and anxiety symptoms, respectively, while 18.78% reported clinically significant insomnia and depression. Among them, being female, married, elderly, presence of medical illness, frontline workers, frequently watching COVID news, and excessive fear of COVID emerged as statistically significant variables associated with stress, anxiety, insomnia, and depression.

Conclusions:

Health-care workers experienced many mental health issues while performing duties during COVID-19 outbreak. Such issues are alarming and need to be addressed with appropriate health-care policy.
О вольтерровом разложении
интегрального оператора Винера-Хопфа
Authors: Arabadzhyan Levon Gurgenovich
Published: July 2021

Рассматривается задача разложения
интегрального оператора Винера-Хопфа в виде произведения
верхнего и нижнего вольтерровых операторов.
Получены условия существования такой факторизации.
Применение указанного разложения к интегральным уравнениям
Винера-Хопфа первого рода может свести изучение определенных классов
таких уравнений к изучению
соответствующих вольтерровых уравнений первого рода.
Библиография: 10 названий.
О нижних оценках квадратно-линейного отношения плоских кривых Пеано
Authors: Shchepin Evgeny Vital'evich , Mychka Eugene Yurievich
Published: July 2021

Доказано, что для любого отображения единичного отрезка на единичный
квадрат найдется пара точек отрезка, для которой квадрат евклидова
расстояния между их образами превосходит расстояние между ними на
отрезке не менее чем в $3.625$ раз. Дополнительное условие на
принадлежность образов начала и конца отрезка противоположным
сторонам квадрата повышает оценку выше четырех.
Библиография: 4 названия.
Об одном замечании к неравенству Стеклова-Пуанкаре
Authors: Nasibov Sharif Mamed ogly
Published: July 2021

В настоящей заметке доказывается неравенство Стеклова-Пуанкаре
в $n$-мерной ограниченной области $\Omega_n$, $n\ge 2$, константа
в котором является наилучшей тогда, когда $\Omega_n$ есть $n$-мерный
шар. Также рассматривается случай неограниченной области с конечной
мерой, в которой неравенство Стеклова-Пуанкаре доказывается на
основании неравенства Соболева.
Библиография: 10 названий.
On the Use of Corpora in Second Language Acquisition – Chinese as an Example
Authors: Ištvánová Mária
Published: July 2021

This paper aims to introduce the language corpora and the advantages of their use in the process of Chinese language acquisition. We provide practical examples of the corpora's direct and indirect use for teaching and learning Chinese as a second language. The exploratory approach towards Chinese by using various types of corpora is applicable for general language seminars as well as specialized translation seminars. The indirect use is mainly linked to the preparation of teaching materials and facilitates the curriculum design.
Causation in Classical Chinese During the Warring States Period and in the Han Dynasty
Authors: Wang Aiqing
Published: July 2021

In this paper, I explore causation in Classical Chinese during the Warring States period and in the Han Dynasty. Whether causation is realised via causative use of words with covert causative verbs, or via overt causative verbs, causation structures can always be divided into Agentive and Causative constructions, which can be further categorised into lexical causatives and productive causatives. I also account for causation in Classical Chinese by means of Feng’s (1998, 2000, 2009) prosodic approach and show that both strategies to form causation structures are compatible with a prosodic theory. I discuss both VO and VV causation and state that Agentive and Causative constructions involving covert causative (light) verbs are prosodic words, whereas those involving overt causative verbs exhibit properties of phrases.
Representing Continuous Functions between Greatest Fixed Points of Indexed Containers
Authors: Hyvernat Pierre
Published: July 2021

We describe a way to represent computable functions between coinductive types
as particular transducers in type theory. This generalizes earlier work on
functions between streams by P. Hancock to a much richer class of coinductive
types. Those transducers can be defined in dependent type theory without any
notion of equality but require inductive-recursive definitions. Most of the
properties of these constructions only rely on a mild notion of equality
(intensional equality) and can thus be formalized in the dependently typed
language Agda.
Towards quantized complex numbers: $q$-deformed Gaussian integers and the Picard group
Authors: Ovsienko Valentin
Published: July 2021

This work is a first step towards a theory of "$q$-deformed complex numbers".
Assuming the invariance of the $q$-deformation under the action of the modular
group I prove the existence and uniqueness of the operator of translations
by~$i$ compatible with this action. Obtained in such a way $q$-deformed
Gaussian integers have interesting properties and are related to the Chebyshev
polynomials.
Key Protected Deputy Signature Scheme against the Deputy Signing Key Exposure
Authors: Chen Jianhong , Yu Kun , Wang Wenhao
Published: July 2021

Key exposure is very harmful to a cryptographic system. To decrease the loss from the deputy signing key vulnerability in identity-based proxy signature systems, we propose the method of key protected deputy signature (IBKPDS) using the method of parallel key insulation. The proposed IBKPDS is based on identities and is shown to be secure with the cryptographic proof. In the proof, there is no random oracle. In an IBKPPS crypto-system, a user stores his short-lived deputy signing key by himself and saves two long-lived keys in two heavily guarded boxes respectively. The derived IBKPDS cryptographic system is heavily key-separated. A thief who wants to obtain crucial information can not corrupt the IBKPDS when he get only one long-lived key. In addition, the user can change the short-lived deputy signing keys frequently at low risk.
A Fast Image Compression Algorithm Based on Wavelet Transform
Authors: Li Xiangjun , Zhang Shuili , Zhao Haibo
Published: July 2021

With multimedia becoming widely popular, the conflict between mass data and finite memory devices has been continuously intensified; so, it requires more convenient, efficient and high-quality transmission and storage technology and meanwhile, this is also the researchers’ pursuit for highly efficient compression technology and it is the fast image transmission that is what people really seek. This paper mainly further studies wavelet analysis and fractal compression coding, proposes a fast image compression coding method based on wavelet transform and fractal theory, and provides the theoretical basis and specific operational approaches for the algorithm. It makes use of the smoothness of wavelet, the high compression ratio of fractal compression coding and the high quality of reconstructed image. It firstly processes the image through wavelet transform. Then it introduces fractal features and classifies the image according to the features of image sub-blocks. Each class selects the proper features. In this way, for any sub-block, it only needs to search the best-matched block in a certain class according to the corresponding features. With this method, it can effectively narrow the search in order to speed up coding and build the relation of inequality between the sub-block and the matching mean square error. So, it can effectively combine wavelet transform with fractal theory and further improves the quality of reconstructed image. By comparing the simulation experiment, it objectively analyzes the performance of algorithm and proves that the proposed algorithm has higher efficiency.
Utilización eficaz de las tecnologías de información y comunicación en procesos sancionatorios y responsabilidad fiscal
Authors: Gavidia Pacheco Angélica , Molina Araujo Eder Alberto , Illidge Correa Ingrid Julissa , Díaz Leonardo de Jesús , Illidge Correa Indira Yulieth
Published: July 2021

The objective of the article was to discuss the relationship between information technologies in the face of the sanctioning processes and fiscal responsibility, which occurred in the territorial tax control bodies, spaces and which more resources are required in technology with specific purpose for this purpose, taking advantage of the moment of the validity of Legislative Act 04 of 2019 in Colombia. Methodologically, the documentary research design near the critical essay was used. To illustrate the arguments and views of the research team, it shows situations in which the administrative process of sanctioning and fiscal responsibility could be improved, emphasizing the hypothesis that the use of information technologies allows the strengthening of the fundamental right of due process of those investigated. It is concluded that, when technological tools are extended to the institutionalist of the Colombian State, it is possible to have a better approach with citizenship, which generates a positive expectation in meeting their needs, being the essence of the Social State of Law to build at all times a democracy of results that transcends procedural formalities and expands social justice.
Judicial Protection of a Human Dignity Right
Authors: Mamnitskyi Valeriy , Cherevatenko Iryna , Horban Natalia
Published: July 2021

Human dignity has become a central legal concept throughout the world and is increasingly used in judicial decisions in many countries that do not include it in their national legislation. However, due to the acknowledged vagueness of the concept, academics and judges have identified many difficulties in its implementation and the specific challenges it poses to the rule of law. Consequently, from a documentary methodology this article tries to develop and propose, from the analysis of different philosophical approaches to the definition of human dignity, a series of principles that can be applied in judicial decisions to achieve a deep common understanding of the usefulness of human dignity and, at the same time, tries to solve problems that are now widely recognized, both by supporters and critics of the judicial use of this concept. It is concluded that the concept of human dignity must have a decisive influence on the formation, not only of substantive law but also of procedural law. It must become a criterion for the need for measures to prevent the abuse of procedural rights, the distortion of justice and the deliberate evasion of its main task.
Gaps and analogies in the formation of registered capital of limited liability and joint-stock companies
Authors: Mikryukov Viktor
Published: July 2021

The aim of the research is to analyses and, using analogy, to examine exhaustively the areas of legal uncertainty in the mechanism of social capital formation of commercial entities, while at the same time checking the coherence of the statutory analogy and the analogy in law as a universal means of protecting and combating gaps in the business sphere. A combination of general logical methods of analysis and synthesis, induction and deduction, comparison and generalization, characteristic of works dealing with civil law, were applied. At the same time, the analogy method was used as a research tool and as a research tool. The conclusions of the work include the identification of specific gaps in the legal regulation of the procedure, methods, and terms of payment of share capital, the identification of ways to overcome these gaps casually and the formulation of proposals for the legislative updating of the regulatory structure of the share capital of commercial companies.