bluuebunny/crossref_metadata_2025 huggingface dataset:
Direct Retrieval of NO
2
Vertical Columns from UV-Vis (390-495 nm) Spectral Radiances Using a Neural Network
Authors: Li Chi , Xu Xiaoguang , Liu Xiong , Wang Jun , Sun Kang , van Geffen Jos , Zhu Qindan , Ma Jianzhong , Jin Junli , Qin Kai , He Qin , Xie Pinhua , Ren Bo , Cohen Ronald C.
Published: May 2022

Satellite retrievals of columnar nitrogen dioxide (NO
2
) are essential for the characterization of nitrogen oxides (NO

x

) processes and impacts. The requirements of modeled
a priori
profiles present an outstanding bottleneck in operational satellite NO
2
retrievals. In this work, we instead use neural network (NN) models trained from over 360,000 radiative transfer (RT) simulations to translate satellite radiances across 390-495 nm to total NO
2
vertical column (NO
2
C). Despite the wide variability of the many input parameters in the RT simulations, only a small number of key variables were found essential to the accurate prediction of NO
2
C, including observing angles, surface reflectivity and altitude, and several key principal component scores of the radiances. In addition to the NO
2
C, the NN training and cross-validation experiments show that the wider retrieval window allows some information about the vertical distribution to be retrieved (e.g., extending the rightmost wavelength from 465 to 495 nm decreases the root-mean-square-error by 0.75%) under high-NO
2
C conditions. Applying to four months of TROPOMI data, the trained NN model shows strong ability to reproduce the NO
2
C observed by the ground-based Pandonia Global Network. The coefficient of determination (

R

2

, 0.75) and normalized mean bias (NMB, -33%) are competitive with the level 2 operational TROPOMI product (

R

2

=
0.77

,

NMB
=
−
29
%

) over clear (

geometric
 
cloud
 
fraction
<
0.2

) and polluted (

N

O

2

C
≥
7.5
×

10

15

molecules/cm
2
) regions. The NN retrieval approach is ~12 times faster than predictions using high spatial resolution (~3 km)
a priori
profiles from chemical transport modeling, which is especially attractive to the handling of large volume satellite data.
An Accessibility Limbo: Learning from Formal-Informal Practices in the Social Housing Complex of Ciudad Verde, Soacha
Authors: Fuentes Natalia Meléndez
Published: May 2022

In Latin America, accessibility is increasingly becoming a priority in urban planning. Yet, looking closer and multidimensionally, its application tends to perpetuate socio-economic-spatial imbalances and segregation in the region by concentrating in few cities only. In addition, accessibility research and literature at the global scale usually over-focus on spatial and statistical analysis to the disregard of the concept’s social and intangible dimensions––as is digital accessibility. Through the case study of the social housing complex of Ciudad Verde, Soacha––to the southeast of Bogotá, Colombia––, I contribute qualitative depth to the ‘accessibility’ concept by looking at it through its intersection with sustainability and the ‘formality-informality’ continuum (Lévy, 2020). Within the framework of a larger research project on urban sustainability in Ciudad Verde (which conducted focal group interviews and map-based surveys), I also place due attention on digital accessibility through Facebook. I recognize the platform as an accessibility tool for residents and use it as a research methodology. This diverse range of evidence revealed limbic elements hindering accessibility in Ciudad Verde. By using the resulting accessibility limbo as an analytical lens, this dissertation extracts lessons on how the Colombian complex can unleash its accessibility and sustainability. I argue that local (in) formal practices of access hold the clues for this; since they point at the missing pieces from a multi-scalar and multidimensional standpoint.
OCORRÊNCIA DE Babesia sp., Ehrlichia canis E Hepatozoon canis EM CÃES DOMICILIADOS, EM DOIS MUNICÍPIOS DO ESTADO DO ESPÍRITO SANTO – BRASIL.
Authors: BITTENCOURT JOYCE , HIURA EMY , Alves Sobral Samilla , De Toledo Vieira Fernanda , Ribeiro Braga Fábio , Tobias Fernando Luiz , Moura de Aguiar Daniel , Langoni Hélio
Published: May 2022

As doenças transmitidas por carrapatos são afecções de grande importância na clínica médica de pequenos animais, devido à alta casuística e ampla distribuição vetorial no território brasileiro. Os principais agentes responsáveis pelas infecções em cães são Babesia sp., Ehrlichia canis e Hepatozoon canis. Os animais infectados são assintomáticos ou apresentam sinais clínicos inespecíficos, sendo necessário a utilização de testes diagnósticos para definição do agente etiológico, e diagnóstico seguro. O objetivo do presente estudo foi determinar a ocorrência desses micro-organismos em cães naturalmente infectados, domiciliados nos municípios de Vila Velha e Anchieta, Espírito Santo, utilizando diferentes testes de detecção: Reação em cadeia polimerase (PCR), sorologia para detecção de anticorpos anti Ehrlichia canis e pesquisa de hematozoários em esfregaço sanguíneo. Foram analisadas 65 amostras de sangue obtidas por venopunção de veia cefálica de cães. No teste de PCR, 4,62% dos animais foram positivos para Babesia vogeli e 1,54% para Ehrlichia canis sendo os resultados para Hepatozoon canis negativos. No teste sorológico para E. canis 90,77% dos animais foram positivos para a presença de anticorpos, e na pesquisa em lâminas de esfregaço sanguíneo 3,02% apresentavam outros hemoparasitas. Os resultados indicam a dispersão desses hemoparasitas na população canina da região de estudo, entretanto com baixa ocorrência. O teste de PCR demonstrou-se como o mais sensível no qual Babesia vogeli foi o agente mais observado.
PACLOBUTRAZOL Y CRECIMIENTO DE RAÍZ Y PARTE AÉREA DE PLÁNTULAS DE PIMIENTO MORRÓN Y BERENJENA
Authors: Partida-Ruvalcaba Leopoldo , Velázquez-Alcaraz Teresa de Jesús , Acosta-Villegas Benigno , Ayala-Tafoya Felipe , Díaz-Valdés Tomás , Inzunza-Castro Jorge Fabio , Cruz-Ortega Jacobo Enrique
Published: May 2022

En esta investigación se determinaron los efectos del paclobutrazol (PBZ) en el crecimiento de raíces y parte aérea de plántulas de pimiento morrón (Capsicum annuum L.) variedad ‘California Wonder’ y de una población segregante de berenjena (Solanum melongena L.) variedad ‘Dalia’. Las semillas de pimiento morrón se sembrarondirectamente en prismas de cristal de 1.1 m x 0.1 m x 0.1 m rellenos con “peat moss” como sustrato; las de berenjena se sembraron en charolas de poliestireno con 200 cavidades rellenas con el mismo sustrato. Las plantas se regaron cada 24 h y se fertilizaron con 1.15 g de N L-1 de agua. Los tratamientos fueron: 0 (testigo), 100, 150, 200, 250, 300 y 350 mg L-1 de PBZ. Cada dosis se aplicó sólo una vez al follaje, con un atomizador manual mediante siete disparos. A los 64 d después de la siembra se determinó la longitud de raíz y la materia fresca o seca de la misma y de la parte aérea. El PBZ incrementó la biomasa de raíz y de la parte aérea en ambas especies de plantas, con relación al testigo; 150 mg L-1 fue la dosis más adecuada en pimiento morrón al incrementar en 1.1 veces la longitud de raíz, en 3.7 veces la materia fresca y en 13 veces la materia seca de las mismas; y al incrementar en 1.5 y 6.7 veces la materia fresca y seca de la parte aérea, respectivamente. En raíces de berenjena incrementó en 1.3 veces la materia fresca y en 71 % la materia seca de raíz; y en 81 % la materia fresca y 89 % la materia seca de la parte aérea.
COMPORTAMIENTO DE CRUZAS DE MAÍZ OBTENIDAS POR IRRADIACIÓN Y SELECCIÓN
Authors: Carrera-Valtierra José Alfredo , Cervantes-Santana Tarcicio
Published: May 2022

La inducción de mutaciones se ha usado para incrementar la variabilidad genética y mejorar caracteres de importancia agronómica. En los últimos 15 años se han liberado 1019 variedades que se obtuvieron directamente de mutaciones. En el presente trabajo se evaluaron compuestos de líneas mutantes tropicales (CLMT) obtenidos por irradiación con 60Co en cruzas con compuestos de líneas F1S1 (CLF) obtenidos de híbridos subtropicales, con la finalidad de identificar material útil para el mejoramiento genético de maíz de la región subtropical de México. Los materiales mutantes lograron una mayor varianza de dominancia (σ2D=5.4) en rendimiento de mazorca que los materiales no mutantes. Las cruzas ‘CLMT-27 x CML-311’, ‘(LMT6)S4-bk-1-7-1p-9p x CML-176’ y ‘(LMT-6)S4-bk-1-7-1p-8p x NC-300’, derivadas de material irradiado, produjeron rendimientos de 13.7, 10.8 y 10.0 t ha-1, y fueron estadísticamente iguales (P ≤ 0.05) al mejor testigo ‘Pioneer 30G40’ que rindió 13.7 y 11.2 t ha-1, en dos experimentos. Los compuestos de líneas mutantes ‘CLMT-27’, ‘CLMT-3’ y ‘CLMT-9’ presentaron una media de ACG en rendimiento de 11.7, 9.7 y 9.1 t ha-1, respectivamente, y pueden ser incluidas en programas de mejoramiento genético de maíz.
Calibración de simulaciones de crecidas de la cuenca alta del río Sauce Grande, provincia de Buenos Aires, Argentina.
Authors: Fernández Sandra Noemí , Pérez Daniel Enrique , Weis Carlos Fernando , Flores Miguel Ángel
Published: May 2022

El objetivo del presente trabajo es calibrar una herramienta de simulación hidrológica para aplicar a la cuenca alta del Río Sauce Grande (CASG), Provincia de Buenos Aires, Argentina, la cual reviste una importancia central en el Sudoeste Bonaerense. Se utilizan datos de precipitaciones y caudales medidos en campo, con los cuales se alimentó el HEC-HMS v.4.2.1. Se usó el método de número de curva del Soil Conservation Service. El tránsito de avenidas fue resuelto por el método de Muskingum. Se lograron ajustes entre muy buenos y excelentes según el índice de Nash-Suttclife. La herramienta hidrológica calibrada utilizada simula satisfactoriamente eventos de tormentas reales. La cuenca muestra un alto grado de sensibilidad al estado inicial de humedad, por lo que es recomendable definir al menos dos escenarios relacionados con los intervalos entre precipitaciones para simulaciones con tormentas de proyecto. Se presentan valores promedio y desvío estándar de los parámetros de ajuste para cada subcuenca.
SIG: A Gossip Based Energy Efficient Routing Protocol For WSN
Authors: Saha Sajal , Sayed Moinul Islam , Das Pradip , Mukherjee BivashKanti
Published: May 2022

Wireless Sensor Network (WSN)has a lot of applicability in today's world, whether it is an informative field or other things. To achieve efficient data transmission, many routing protocols have been proposed where energy is always an important issue. This research aims to overcome the drawbacks of a flooding-based routing protocol by proposing a gossiping-based routing algorithm called SIG: Source Initiative Gossiping. We applied this protocol into a network and achieved that SIG is more energy-efficient than Flooding and Gossiping. It consumes about 50% less energy than flooding and 35% less energy than Gossiping. Our results indicate that SIG successfully achieves application reliability requirements in many topologies. We simulated it in MATLAB to achieve a comparing result among Flooding, Gossiping, and SIG
A Study On Queuing Systems And Its Deterministic Measures
Authors: Reddy CS , S Krishna Anand
Published: May 2022

In this paper we show that queueing theory can accurately model the flow of in-patient in hospital. In which arrival rate, service rate and number of parallel servers are all considered as fuzzy numbers. Further Robust Ranking technique is used to find the expected mean queue length and waiting time in queue. Further numerical illustration is also given to justify the validity of the model. In this model capacity of the system is infinite.
La dispersión espectral y sus aplicaciones en el análisis matricial y la teoría de operadores
Authors:   , Zárate Sebastián Gonzalo
Published: May 2022

La teoría de perturbaciones constituye un tópico de estudio dentro del análisis matricial y la teoría de operadores. Asociados a este tópico, se encuentran los temas clásicos de álgebra lineal numérica y teoría de la aproximación. En este contexto, podemos pensar en el estudio de la sensibilidad de los valores de Ritz y los cocientes de Rayleigh de matrices autoadjuntas, es decir, los cambios en los autovalores de compresiones de matrices autoadjuntas, que es un campo de investigación sólido y bien establecido en estas áreas.
Examining the Impact of Remote e-Working on Job Performance and Occupational Wellbeing among Academics in Malaysia: Job Demands-Resources Theory Perspectives
Authors: Ting Qian-Hui , Lew Tek-Yew , Sim Adriel K.S.
Published: May 2022

Social distancing requirements during the COVID-19 pandemic has accelerated the adoption of
remote e-working (Banerjee, 2020). In practice, remote workers’ mental health and wellbeing
has received incremental attention (Price, 2018; Russell, 2019)- particularly among academics
(Han et al., 2020; Mohamed et al., 2020). The prevalence of remote e-working practices among
academics prior to the pandemic (Aczel et al., 2021), prolonged exposure to remote e-working
due to campus closures (Ross, 2021); as well as abruptly remodelled expectations of higher
education (El-Azar, 2022) resulted in high demands among academics (Cao et al., 2020).
According to De Gruyter (2020), academics have experienced stress, insecurity and pressure as
collaborative networks, shift to online teaching and supervision, as well as work-life balance
were disrupted. Theoretically, few studies have adopted the job demands-resources theory as a
framework to understand and promote occupational wellbeing and performance in remote e-
working environments (Bilotta et al., 2021). This indicates that existing models predicting
outcomes of telecommuting could have been flawed. Empirical studies have equally produced
conflicting outcomes of remote e-working (Grant et al., 2019; Santuzzi & Barber, 2018) .
Keywords: Conservation of Resources; Job Demands-Resources; Job Performance;
Occupational Wellbeing; Remote e-working
Accuracy of Tooth Development as an Indicator of Dental Age Estimation for Children in Indonesia
Authors: Kurniawan Arofi , Agitha Shintya R. A , Chusida An'nisaa , Rizky Beta N. , Prakoeswa Beshlina F. W. R. , Nailah Salma , Singarimbun Romario G. A , Margaretha Mieke S.
Published: May 2022

Abstract: Dental age estimation methods have been developed in such a way as to fulfill various requirements of medico-legal, law enforcement, and victim identification in mass disasters. This study aimed to evaluate the accuracy of the Willems dental age estimation method for children in Indonesia. The estimated dental age (EDA) was assessed using the Willems method by two examiners. The statistical analysis was carried out using IBM® SPSS® Statistics version 23.0 (IBM, Armonk, New York, USA). The results obtained 92 panoramic radiographs ranging in age from 8 to 14 years from the Departments of Forensic Odontology and Radiology, Universitas Airlangga, Surabaya, Indonesia. The average chronological age (CA) of the subjects in this study was 11.30+1.43 years for boys and 11.65+1.55 years for girls. The overall mean differences between the CA and the EDA for boys and girls were -0.08+0.76 and -0.31+0.97. In this study, the mean age difference was more significant in girls than in boys. The difference in growth spurt timing between boys and girls may explain the difference in dental maturation, as girls begin their pubertal growth spurt about two years earlier than boys. In general, girls' dental development begins and ends earlier than boys'. In conclusion, the dental age estimation method proposed by Willems can be applied to boys, as there is no significant statistical difference. However, when applying this method to girls, a thorough analysis may be required.Keywords: chronological age; dental age; forensic odontology; human rights; justice
Comparison of modernization waves in Russia and Japan over the past 150 years (institutional approach)
Authors: Druzhinin N. L. , Yakovleva T. A.
Published: May 2022

Aim. The presented study aims to structure the major elements of modernization policy and to conduct a comparative institutional analysis of modernization practices in Russia and Japan.

Tasks. The authors identify common and different elements in the modernization strategies adopted by Russian and Japanese authorities; determine the reasons for the success of the implemented policy and the reasons for failed modernization attempts.

Methods. This study uses general scientific methods of cognition and the institutional approach to analyze economic processes and examine the modernization policy in Russia and Japan over the past century and a half.

Results. Despite a certain connection and some similarities between modernization waves in Russia and Japan, the origins, driving forces, and, most importantly, the results of modernization processes in these countries have significant differences. Japanese reformers have the advantage of the inherently Japanese ability to adapt a variety of institutions to solve the urgent tasks of national development. The peculiarity of Russian modernization waves was their scale, along with a radical restructuring of basic institutions. This resulted in both the outstanding success and effectiveness of the reforms as well as their cost and incompleteness, which generated waves of counter-reforms.

Conclusion. By studying and comparing modernization waves in Russia and Japan, it is possible to identify the national specifics of problems associated with social reforms and factors that ensure favorable results of the modernization process. Institutional reforms play an important role among such factors. A criterion of their success is the ability to adapt traditional institutions to productive work in new conditions.
Phenomenon of creativity and aspects of communication with creative employees in modern companies in a pandemic
Authors: Denisov A. F.
Published: May 2022

Aim. The work aimed to reveal the importance of creative employees for the organization, to describe approaches to their activities aimed at improving labor efficiency in a pandemic.

Tasks. The work was performed to identify the benefits and drawbacks in the work of creative employees, demonstrate the experience of interacting with them, characterize the aspects of personnel management, including creative employees, in a pandemic.

Methods. The phenomenon of creativity, the behavioral characteristics of creative employees, and possible ways of communication are discussed through analysis of scientific articles, materials of conferences on personnel management in a pandemic, and interviews.

Results. The study of the phenomenon of creativity has shown the important role of creative employees in any modern organization, the risks of managing them, the implementation of the main fields of management and communication in a pandemic. The forced transition of organizations to remote work has insignificantly complicated communication with employees, and their effectiveness in the performance of official duties. Various management tools are used to maintain stable and effective communication with employees.

Conclusion. Despite the complexity of managing creative employees, in view of their great value for any modern organization, trade-offs in managing them are required. Organizations mastered quickly the peculiarities of personnel management, including creative employees, in forced transition to remote work. There are various remote management and communication tools to keep all employees up and running.
Investigating competition in the problems of optimal resource allocation
Authors: Barkalaya O. G.
Published: May 2022

Aim. The presented study aims to address the issues of parameter estimation in the problems of optimal resources allocation for the previously introduced competition indicator; to analyze the influence of dimensionality, resource constraints, and other factors on the competition indicator; to exemplify the relationship between the indicator and the extremum of the objective function, constraints, and dual estimates.

Tasks. The authors consider cases when the competition indicator captures a change in the initial data that cannot be estimated on the basis of traditional indicators of analysis and estimates: the maximum of the objective function, the optimal solution, Lagrange multipliers, or dual variables; determine the relationship between the competition indicator and the optimum of the objective function and dual variables through examples and in general; show that the analysis of the results of solving the problem becomes more capacious and informative if the factor of variable “competitiveness” is applied; identify patterns between efficiency, competition, resource constraints, and dual estimates.

Methods. The selected competition indicator for optimal resource allocation tasks is based on the concept of “rigorous selection” of competitors applying for resources. The indicators are calculated in full accordance with the known optimality conditions for problems of this class, making it possible to interpret the results of optimization as a measure of competition for resources.

Results. The provided examples reflect linear and nonlinear functions as well as the relationship between the competition indicator and dual estimates, resource constraints, and efficiency. It is proved that the competition indicator logically fits into the traditional analysis of the results of solving the problem of linear and nonlinear programming with allowance for duality.

Conclusion. The competition indicators considered in the study can be included in the standard analysis for solving the problems of optimal resource allocation, which involves finding an extremum, searching for an optimal plan, analyzing stability, limits, dual estimates, a measure of resource scarcity. As can be seen from the examples, applying the competition indicator to the analysis not only makes the analysis of the results more capacious and informative, but also makes it possible to detect patterns between competition and efficiency, similar to when the removal of barriers and restrictions in the economy leads to its revival, and the reduction of resources causes increased competition.
Export endowments of the educational services market of the Primorsky Territory and strategic ways of its use
Authors: Latkin A. P. , Wang Bing
Published: May 2022

Aim.The work aimed to analyze contemporary approaches to the development of the export of educational services, as well as the practice of managing this process in the Russian Primorye, as well as to substantiate the concept of its state support at the regional level.

Tasks.The work was performed to generalize theoretical ideas about modern models of export of educational services and analyze the concepts adopted in Russia, as well as programs for its development in the mid-term; to identify and systematize trends and problems in the development of exports of higher education services in the Primorsky Territory over the past ten years to citizens of the border provinces of the People’s Republic of China (PRC); develop a conceptual model of state support for the export of educational services at the regional level and a model of the strategic directions of this process at the university level.

Methods.The tasks were solved within the framework of the accepted research hypothesis, using the methods of systemic, structural, and functional analysis in a strict logical sequence, with the use of a large array of theoretical and factual data.

Results.The stable dynamics of the development of export of higher education services to the PRC in the pre-pandemic period was determined. The authors substantiate the problem of managing this process at the macro and micro levels, with increased competition in the markets of international educational services. A conceptual model of state support for the export of educational services is proposed.

Conclusion.The studies conducted and the results obtained serve as an organizational and methodological basis for the implementation of a more effective policy for the development of the export of educational services in the Russian regions bordering the PRC.
Management of training personnel for the service sector of youth educational tourism
Authors: Utkina O. N.
Published: May 2022

Aim. The work aimed, based on the analysis of current trends in the development of the service sector of youth educational tourism, to identify the conditions for effective management of personnel training for it with the maximum involvement of young people.

Tasks. The work was performed to characterize the current trends in the development of the service sector of youth educational tourism; consider the personnel training management model for this area, and justify the conditions for its effective application.

Methods. The trends in the development of the service sector of youth educational tourism, the personnel training management model for this area and the conditions for its effective application were considered using general methods of scientific cognition.

Results. Certain trends in the development of the service sector of youth educational tourism are registered, namely the increasing importance of youth educational tourism as a tool to meet the needs of young people in continuous self-development and raising the level of education and professionalism; lack of professional staff for the service sector under study; an increase in the role of programs of additional professional education and vocational training, the implementation of which requires the presence of a practical component at the enterprises of partneremployers; strengthening the role of volunteer communities, including with the involvement of professional young specialists.

Conclusion. The study revealed that the conditions for effective management of personnel training for the service sector of youth educational tourism include the systemic nature of personnel training, including in youth educational tourist centers operating under educational organizations; development of the volunteer movement at these centers as a contemporary tool for interacting with the consumer, monitoring the effectiveness of personnel training in the centers based on criteria-based assessments, managing risk factors as a guarantee of consumer safety.
Risk-based constraints for the optimal operation of an energy community
Authors: Dolányi Mihály , Bruninx Kenneth , Toubeau Jean-François , Delarue Erik
Published: May 2022

This paper formulates an energy community's centralized optimal bidding and scheduling problem as a time-series scenario-driven stochastic optimization model, building on real-life measurement data. In the presented model, a surrogate battery storage system with uncertain state-of-charge (SoC) bounds approximates the portfolio's aggregated flexibility.

First, it is emphasized in a stylized analysis that risk-based energy constraints are highly beneficial (compared to chance-constraints) in coordinating distributed assets with unknown costs of constraint violation, as they limit both violation magnitude and probability. The presented research extends state-of-the-art models by implementing a worst-case conditional value at risk (WCVaR) based constraint for the storage SoC bounds. Then, an extensive numerical comparison is conducted to analyze the trade-off between out-of-sample violations and expected objective values, revealing that the proposed WCVaR based constraint shields significantly better against extreme out-of-sample outcomes than the conditional value at risk based equivalent.

To bypass the non-trivial task of capturing the underlying time and asset-dependent uncertain processes, real-life measurement data is directly leveraged for both imbalance market uncertainty and load forecast errors. For this purpose, a shape-based clustering method is implemented to capture the input scenarios' temporal characteristics.
A Novel Waveform-Tracking BLE Receiver
Authors: Hu Suoping , Chen Peng , Quinlan Philip , Staszewski Bogdan
Published: May 2022

We present a first-ever waveform-tracking receiver (RX) with type-II phase-tracking loop. In this preprint, a novel nonlinear filter in the feedback path is proposed to obtain better interference rejection performance. This digital nonlinear filter assists the receiver with tracking the waveform intelligently by predicting the incoming symbols; hence, we define this proposed RX as a waveform-tracking (WT)-RX. The simulation and preliminary measurement results are demonstrated in this paper. Moreover, we explore the issues of the current version WT-RX to provide guidance on possible future follow-up activities.
PV module energy rating standard IEC 61853-3 intercomparison and best practice guidelines for implementation and validation
Authors: Vogt Malte , Riechelmann Stefan , Gracia-Amillo Ana , Driesse Anton , Kokka Alexander , Maham Kinza , Kärhä Petri , Kenny Robert , Schinke Carsten , Bothe Karsten , Blakesley James , Music Esma , Plag Fabian , Friesen Gabi , Corbellini Gianluca , Riedel Nicholas , Valckenborg Roland , Schweiger Markus W , Herrmann Werner
Published: May 2022

The IEC 61853 standard series aims to provide a standardized measure for PV module energy rating, namely the Climate Specific Energy Rating (CSER). For this purpose, it defines procedures for the experimental determination of input data and algorithms for calculating the CSER. However, some steps leave room for interpretation regarding the specific implementation. To analyze the impact of these ambiguities, the comparability of results and the clarity of the algorithm for calculating the CSER in part 3 of the standard, an intercomparison is performed among research organizations with 10 different implementations of the algorithm. We share the same input data, obtained by measurement of a commercial crystalline silicon PV module, among the participating organizations. Each participant then uses their individual implementations of the algorithm to calculate the resulting CSER values. The initial blind comparison reveals differences of 0.133 (14.7%) in CSER. After several comparison phases, a best practice approach is defined, which reduces the difference by a factor of 210 to below 0.001 (0.1%) in CSER for two independent PV modules. The best practice presented in this paper establishes clear guidelines for the numerical treatment of the spectral correction and power matrix extrapolation, where the methods in the standard are not clearly defined. Additionally, we provide input data and results for the PV community to test their implementations of the standard’s algorithm. To identify the source of the deviations, we introduce a climate data diagnostic set. Based on our experiences, we give recommendations for the future development of the standard.
Surgical Phase Recognition: A Review and Evaluation of Current Approaches
Authors: Demir Kubilay Can , Schieber Hannah , Roth Daniel , Maier Andreas , Yang Seung Hee
Published: May 2022

Objective: In the last decades, there has been
a growing interest in exploring surgical procedures with
statistical models to analyze operations in different se?mantic levels. This information is necessary for developing
context-aware intelligent systems, which can assist the
physicians during operations, evaluate procedures after?ward or help the management team to effectively utilize the
operating room. The objective is to extract reliable patterns
from surgical data for the robust estimation of surgical
activities performed during operations. This paper reviews
the state-of-the-art methods for the recognition of highest?level surgical activities, i.e., phases, and focuses on data
and learning algorithms. Methods: Three databases, IEEE
Xplore, Scopus, and PubMed are searched, and additional
studies are added through a manual search. After the
database search, 173 studies are screened and a total of
33 studies are selected for the review. Conclusion: The de?velopment of robust surgical phase recognition algorithms
requires large and diverse datasets, as the task is highly
variable and complex. Much progress has been made, but
publicly available data are still limited in volume and biased
to endoscopic videos. Unsupervised or semi-supervised
learning approaches and active learning methods are pro?posed to lessen the consequences of these challenges.
Additionally, other potential data sources in the operating
room and using different modalities together could be in?vestigated in the future. Significance: The present study
provides a comprehensive review of surgical phase recog?nition algorithms, their generalizability, and point under?investigated areas for possible improvements
Comparison of ElectroMagnetic Emissions & Harmonic Analysis of 20 HP Motor Controlled by 3L NPC Inverter
Authors: Bansal Abhishek
Published: May 2022

In this paper, thirteen experiments are performed to measure the conducted electromagnetic emissions namely common mode and differential mode noises along with time-varying spectra. These emissions are generated by switching IGBTs of three phase three level inverter whose switching pulse width modulated frequency is varied at twelve frequencies from 8 kHz to 120 kHZ. Two equipments under test (EUT) are simultaneously measured for emissions using CE102 of MIL-STD-461G standard with line impedance stabilization network (LISN) and spectrum analyzer. The EUTs are inverter and asynchronous machine, where the inverter is nonlinear space vector modulated three-phase three-level diode neutral point clamped inverter, and the asynchronous machine is non-linear rotating machine, 20HP (15 kW), 400V, 50Hz, Y-winding, squirrel-cage induction motor. The harmonic distortion measurements namely total harmonic distortion(THD), THD in percentage, signal-to-noise ratio(SNR), signal-to-noise and distortion ratio(SINAD) and spurious-free dynamic range(SFDR) are calculated, tabulated and plotted at 15 harmonics resulting from the emissions. The time varying spectra is captured using Welch’s method and Short-time Fourier transform and is also submitted as dataset for each phase of the asynchronous machine and the inverter.
The colour of Valencian silk fabrics in the European market (1475-1513)
Authors: Navarro Espinach Germán , Aparici Martí Joaquín
Published: May 2022

Our research compares guild ordinances, judicial proceedings, technical manuals of dyeing and especially fiscal sources in the Valencian archives to check the fashion trends on the colour of silks fabrics during the 15th-16th centuries in relation to what was happening in the European market at that time. The silk declarations in Valencia city from 1475 to 1513 makes it possible to establish a database of 3,871 fiscal registers with more than 90,000 meters of Valencian textiles (100,220 varas or alnes). The 73.47 percent of them was in black. This colour was also fashionable in the silk industry of Genoa, from where there was an important technological transfer to Valencia through the immigration of technical masters, workers and specialized businessmen.
Un changement radical dans la consommation de tissus par la royauté et son milieu (1293-1504): de la laine au lin et à la soie
Authors: Fernández de Pinedo Nadia , Moral Maria Paz , Fernández de Pinedo Emiliano
Published: May 2022

Since the reign of Juan II and especially Queen Isabel I of Castile, we have found that silk fabrics had displaced expensive dyed wool cloths from the first place, at least among the privileged groups. At the same time, a very fine linen fabric, the holanda spread in a spectacular way, at least in the case of the House of Isabel I, especially as body linen and household line. In this article, we discuss how these changes could be transmitted downwards through some examples of different social groups - nobility, townspeople, peasants - considering the economic and social limitations that would have been relevant in its diffusion.
Lexico-Grammatical Analysis of Three Extracts Selected from Tony Onamade Jejuri’s Bed at a Crossroads (2009): Focus on Textual Meaning
Authors: SALAMI Amadou , YAMBODE Houévo Diane Blandine
Published: May 2022

Drawing its theoretical underpinnings from Systemic Functional Linguistics, this study analyzes theme patterns in Tony Onamade Jejuri’s Bed at a Crossroad. Using sampling method, three extracts have been selected from the novel. The focus on textual meaning aims at unveiling the hidden linguistic resources or codes incorporated in this novel. It also aims at bringing out how Tony Onamade Jejuri organized and established themes to construct clauses in order to convey his message. Using mixed research method (quantitative and qualitative research methods), the findings reveal different linguistic features pertaining to the characteristics of the discourse. It is then realized the overtopicalizing of the three selected extracts.
Expert –System: A Web-Based System for Patient Specific Drug Interaction Testing
Authors: Mahini Seyfali
Published: May 2022

The information system presented in this article makes drug selection easier and indicates possible interactions with existing medication. In the event of an interaction with multiple medication, the consumer is specifically warned. In addition, special algorithms determine alternative drugs with the same effect in order to avoid the undesired interaction.
Health Inequity in Bangladesh: An Empirical Note
Authors: Islam Dr. Sadequl
Published: May 2022

The main objective of this paper is to examine health inequity in Bangladesh based on the Demographic and Health Surveys. It explores several measures of health inequity in selected health indicators. The results are mixed: inequity has declined in some health indicators such as infant mortality and immunization. However, inequity remains pervasive in births assisted by skilled personnel, antenatal care, and births delivered at health facilities.
Histological Changes in Rat Testicular Tissue Architecure upon Short-Term Exposure to Inhaled Dichlorvos
Authors: Hart Hart , S J. , Ibeachu Ibeachu , C P.
Published: May 2022

Background to the study: The use of insecticides have been encouraged in most Nigerian homes in the eradication of insects that could harm humans despite the side effects of exposure to these insecticides. The study aim was to examine the toxic effect of inhaled dichlorvos (DDVP) on the histological architecture of the testes of wistar rats on short-term exposure. Methods: Twenty (20) albino male wistar rats weighing 140g – 180g were recruited for this research and were randomly placed into four (4) groups of five (5) rats per group. Group 1 was control group, while groups 2 – 4 were given 10ml DDVP/90 ml distilled water – v/v, 20ml DDVP/80 ml distilled water – v/v and 40ml DDVP/60 ml distilled water – v/v, respectively. At completion of exposure, rats were anaesthetized with chloroform, sacrificed and their testes were harvested for routine histopathology procedure. The stained sections were morphologically evaluated and the pictures of the slides compared. Photomicrographs were obtained with the aid of Am-scope camera fitted on an Açu-scope microscope. Results: Results obtained from the control group showed that the testes presented with a normal histological make-up depicted by the presence of normal seminiferous tubules, no signs of germ cell distortions. However, experimental groups showed graded levels of degenerative changes in germinal layers of the seminiferous tubules as well as notable vacuolations. Conclusion: It can be concluded that prolonged exposure to dichlorvos inhalation could be toxic to the reproductive system of male wistar rats.
Psychological Capital and Organizational Ambidexterity
Authors: Barinua Victor , Chima Madu- , Lilian Uchenna
Published: May 2022

Psychological capital is employee’s positive state in obtaining and sustaining the competitive advantage. Psychological capital is referred to as the “HERO within” indicating what individuals are likely to achieve with, as opposed to what they are likely to achieve without, positive psychological resources. This acronym also connotes the four positive cognitive resources constituting psychological capital: Hope, Efficacy, Resiliency, and Optimism. It is posited that these resources tend to work together resulting into superior performance. This paper examines the relationship between psychological capital and organizational ambidexterity. The paper is conceptual in nature and reviewed extant literature. The findings from the reviewed literature revealed that many psychological attributes are yardsticks for the survival of any organization, these are: consistence, perseverance, appreciation, innovative etc. Managers’ ambidextrous behaviors’ needs to be developed and utilized for smooth running of any institution and on time too. The study recommends that management of organizations can help their managers, through training and re-training to develop their psychological capital. Also, employees with low psychological capital should not always be used in critical situations that need urgent attention.
Endoscopic Per Oral Myotomy in the Treatment of Achalasia: Initial Experience on 7 Patients in a Morocco Center
Authors: Figuigui Mouna , Lahmidani Nada. , Cherkaoui Hajar , El Abkari Mohammed. , Ibrahimi Sidi Adil. , Benajah Dafr-Allah.
Published: May 2022

Endoscopic per-oral myotomy (POEM) is innovative an endoscopic technique for treatement of achalasia. This new technique has recently introduced in Morocco. It was performed on 7 patients at our institution. We collected patients data, the duration of the procedure, the location of the myotomy and patients follow-up. Results: Per-oral endoscopic myotomy was successfully performed in all patients, with adverse events observed in only one patient. Two months after POEM, significant reductions in symptom scores (Eckhardt Score 7.5vs 3) and this persisted at 3 years after POEM. Gastroesophageal reflux was observed in 16.8% of patients at 1 month and 21.3% at 3 years of follow-up. Per-oral endoscopic myotomy was successfully performed in all cases. Complications were rare (1.4%) and there was no mortality. Significant improvements in Eckhardt score were observed at 2 months, 1 year after POEM. Conclusions: Based on our series, POEM is a safe and effective treatment for achalasia, there are relatively few contraindications, and the procedure can be used as first- or second-line treatment.
Ushairi WA Kiganda Unavyoweza Kuchangia Na Kuendeleza Ushairi WA Kiswahili Kimtindo Na Kimaudhui: Mfano WA Ufundishaji Nchini Uganda
Authors: Edwine Atukunda , Amukowa Dkt. Deborah , McOnyango Dkt. Owen
Published: May 2022

Wanafunzi wengi nchini Uganda wanachukulia utanzu wa ushairi wa Kiswahili kuwa mgumu na wanapata ugumu katika kujifunza ushairi wa Kiswahili. Ushairi wa Kiganda umekuwa unatendwa vizuri katika mtihani wa kitaifa. Upande wa Kiswahili, kuna ugumu katika ujifunzaji wa ushairi wa Kiswahili na ugumu huu umesababisha matokeo mabaya katika mtihani wa kitaifa katika somo la ushairi wa Kiswahili nchini Uganda. Wanafunzi hawa husomea katika mandhari sawa. Hili linazua swali: kwa nini wanafunzi wanaofanya mtihani wa ushairi wa Kiganda watende vizuri kuliko wanafunzi wa ushairi wa Kiswahili? Makala hii itaweka wazi mambo ambayo ushairi wa Kiswahili waweza kukopa kutoka ushairi wa Kiganda na kujiendeleza. Madhumuni ya makala hii yatakuwa: Kudadavua jinsi ushairi wa Kiganda unaweza kusahilisha mtindo katika ushairi wa Kiswahili kupitia ufunzaji na ujifunzaji na kutathimini jinsi ushairi wa Kiganda unaweza kukuza maudhui katika ushairi wa Kiswahili kupitia ufunzaji na ujifunzaji. Mashairi yalikusanywa kutoka diwani mbili za Kiswahili na mbili za Kiganda. Mashairi 60 yalikusanywa yaani 30 ya Kiganda na 30 ya Kiswahili na 15 yalichaguliwa kutoka kila lugha kwa kutumia uteuzi nasibu. Mashairi yalitolewa kwenye diwani za Kiswahili; “Malenga wa ziwa kuu” na “Malenga wa karne moja” na za Kiganda; “Ab’Oluganda ab’Enda emu” na “Balya n’ensekeezi”. Makala hii unafafanua jinsi mwalimu wa ushairi wa Kiswahili anavyoweza kuhamisha maarifa kutoka ushairi wa Kiganda hadi wa Kiswahili. Utamsaidia kuendeleza ushairi wa Kiswahili kuhamisha maarifa ya ujifunzaji na ufunzaji kutokana na ushairi wa Kiganda ili kusahilisha ujifunzaji wa ushairi wa Kiswahili.
The Choosing Wisely Initiative and Esomeprazole Over-Prescription
Authors: Awashi Hassan A. , Darbashi Hussain A. , Khan Liaqat A.
Published: May 2022

The choosing wisely initiative of the Adaa program, in collaboration with the Ministry of Health (MoH), Kingdom of Saudi Arabia, aimed to improve physician-patient interaction to plan their care while avoiding the unnecessary and inappropriate tests, treatments, and procedures that increase the cost while adding no benefit in the health-related outcome of the patient. Of the many avoidable treatment medications, the one noted and selected is the over and misuse of esomeprazole, a proton pump inhibitor (PPI), used for gastroesophageal reflux disease (GERD), gastric ulcers, etc. The drug is commonly prescribed in clinical practice in general and over-the-counter in specific. As the published literature reports major adverse events associated with the drug, there is a need for a controlled prescription in selected cases to avoid its overprescription. In compliance with the choosing wisely initiative of Adaa health, we surveyed a regional secondary care facility (Baish General Hospital) after a twelve-week rigorous health education program for physicians and patients and concluded a substantial reduction in the prescription of esomeprazole. The survey findings; indicate the beneficial effects of teaching programs on avoidable treatment options to opt for suitable alternatives which will be both productive and cost-effective.
Does food have anything to do with Memory and Intelligence? A Review on Alzheimer's disease Fighting
Authors: Abushwereb Hanan S.
Published: May 2022

Alzheimer's disease is a neurological disorder that causes the brain to gradually and irreversibly shrink, atrophy, and die. There is no successful treatment for Alzheimer's disease to this day that makes it necessary to reduce its occurrence rather than treat the disease after it has occurred. Therefore, it became necessary and priority to focus on preventing it and knowing the causes that lead to the deterioration of the brain after it was fully active and strong. Back in the early stages of brain development in which food plays an important role. The focus comes on the important elements and materials that increase intelligence, skills, brilliance of thinking and memory, which continue with the person throughout his life after feeding him with important functional elements and vitamins. It is noted that with the development and increase of processed and refined food items that have recently entered the human body, there has been a significant increase and acceleration in the incidence of Alzheimer's disease at alarming and frightening rates. It has become worth reconsidering what we eat and focusing on the right food and its goal as one of the factors affecting the health of brain cells. Therefore nutritional awareness has become essential and nutritional supplementation is essential for a certain age as a fighter and as a preventer before contracting the disease.
Incidental Finding of Posterior Urethral Valve during Routine Antenatal Ultrasound: Diagnostic Imaging Case Report in Botswana
Authors: Mulenga Cuthbert , Bwanga Dr. Osward , Moloi Dr. Thabo A.
Published: May 2022

Medical ultrasound is a particularly useful imaging method used in the diagnosis of urinary fetal anomalies. One such fetal anomaly is the posterior urethral valve (PUV), which is a congenital malformation of the male urethra occurring early in gestation life. PUV is a common cause of obstructive uropathy in males and fetal death during pregnancy. We report from a medical imaging perspective on a rare and high-risk case of a PUV detected during routine antenatal ultrasound imaging in Botswana. The first scan performed at 16 weeks of gestation age was unremarkable. However, subsequent antenatal ultrasound scans at and after 20 weeks demonstrated bilateral hydronephrosis, distended ureters, and a urinary bladder which gradually increased with the gestation age. There was also a corresponding reduction in amniotic fluid and fetal movements. As a result of these complications, the pregnancy was classified as a “high-risk.” At 30 weeks, spontaneous labour occurred, and a fresh still birth male fetus was delivered.