bluuebunny/crossref_metadata_2025 huggingface dataset:
Химическое сжатие, структурная нестабильность и ИК-активные фононы в ряду редкоземельных аналогов францисита Cu-=SUB=-3-=/SUB=-RE(SeO-=SUB=-3-=/SUB=-)-=SUB=-2-=/SUB=-O-=SUB=-2-=/SUB=-Cl
Authors: Новикова Н.Н. , Яковлев В.А. , Кузнецова Е.С. , Бердоносов П.С. , Климин С.А.
Published: November 2021

ATR and transmission spectra of a series of rare-earth francisite-like phases Cu3RE(SeO3)2O2Cl (RE is a rare earth element, RE = Nd, Sm, Eu, Gd, Dy, Ho, Tm, Yb) were studied. The frequencies of the IR-active phonons of the crystals under study were determined. In the dependences of phonon frequencies on the ionic radius in a series of isostructural compounds, two tendencies are observed: a hardening of frequencies due to an increase in chemical pressure and a softening of the vibration frequencies, in which rare-earth ions are involved, due to an increase in the mass of a specific rare-earth ion. In the Cu3Dy(SeO3)2O2Cl crystal, an anomalous softening of low-frequency phonons at low temperatures was observed, which was apparently associated with the structural instability of the compound.
Спектроскопическое исследование структурных и магнитных свойств TbCr-=SUB=-3-=/SUB=-(BO-=SUB=-3-=/SUB=-)-=SUB=-4-=/SUB=-
Authors: Кузьмин Н.Н. , Болдырев К.Н. , Мальцев В.В.
Published: November 2021

The paper presents a flux crystal growth technique, studies of the structural peculiarities and the optical absorption spectra of double orthoborate TbCr3(BO3)4 with a huntite structure. The intensities of the phonon modes were used to determine the ratios of the rhombohedral and monoclinic polytypes for this compound, depending on the growth conditions. The broadband absorption spectra of the Tb3+ ions in TbCr3(BO3)4 single crystals were studied in the temperature range from room temperature to 3.0 K. From them, the energies of the crystal-field levels of the Tb3+ ion were determined. The temperature dependence of the absorption spectra of the Er3+ probe ion in TbCr3(BO3)4:Er(1%) shows that there are two phase transitions and agrees with their previously proposed interpretation: at 8.8 K, the chromium subsystem antiferromagnetically orders, and at 5 K, a reorientation of chromium magnetic moments occurs.
Влияние способа сильного легирования на композиционную однородность и оптические свойства монокристаллов LiNbO-=SUB=-3-=/SUB=- : Mg
Authors: Сидоров Н.В. , Теплякова Н.А. , Палатников М.Н.
Published: November 2021

Raman spectroscopy, laser conoscopy and photoinduced light scattering methods have been applied to comparatively study composition uniformity of strongly doped LiNbO3 crystals with a magnesium concentration close to a threshold value ≈5 mol% MgО, grown from a charge synthesized using precursor Nb2O5:Mg (homogeneous doping method) and at direct addition of magnesium to the melt (direct doping method). It has been shown that application of homogeneous doping method allows one to obtain compositionally more homogeneous heavily doped LiNbO3:Mg crystal than direct melt doping method.
The Impact of Public Health Events on COVID-19 Vaccine Hesitancy on Chinese Social Media: National Infoveillance Study (Preprint)
Authors: Zhang Zizheng , Feng Guanrui , Xu Jiahong , Zhang Yimin , Li Jinhui , Huang Jian , Akinwunmi Babatunde , Zhang Casper J P , Ming Wai-kit
Published: November 2021

BACKGROUND

The ongoing COVID-19 pandemic has brought unprecedented challenges to every country worldwide. A call for global vaccination for COVID-19 plays a pivotal role in the fight against this virus. With the development of COVID-19 vaccines, public willingness to get vaccinated has become an important public health concern, considering the vaccine hesitancy observed worldwide. Social media is powerful in monitoring public attitudes and assess the dissemination, which would provide valuable information for policy makers.

OBJECTIVE

This study aimed to investigate the responses of vaccine positivity on social media when major public events (major outbreaks) or major adverse events related to vaccination (COVID-19 or other similar vaccines) were reported.

METHODS

A total of 340,783 vaccine-related posts were captured with the poster’s information on Weibo, the largest social platform in China. After data cleaning, 156,223 posts were included in the subsequent analysis. Using pandas and SnowNLP Python libraries, posts were classified into 2 categories, positive and negative. After model training and sentiment analysis, the proportion of positive posts was computed to measure the public positivity toward the COVID-19 vaccine.

RESULTS

The positivity toward COVID-19 vaccines in China tends to fluctuate over time in the range of 45.7% to 77.0% and is intuitively correlated with public health events. In terms of gender, males were more positive (70.0% of the time) than females. In terms of region, when regional epidemics arose, not only the region with the epidemic and surrounding regions but also the whole country showed more positive attitudes to varying degrees. When the epidemic subsided temporarily, positivity decreased with varying degrees in each region.

CONCLUSIONS

In China, public positivity toward COVID-19 vaccines fluctuates over time and a regional epidemic or news on social media may cause significant variations in willingness to accept a vaccine. Furthermore, public attitudes toward COVID-19 vaccination vary from gender and region. It is crucial for policy makers to adjust their policies through the use of positive incentives with prompt responses to pandemic-related news to promote vaccination acceptance.
Palbociclib versus abemaciclib in HR+/HER2- advanced breast cancer: an indirect comparison of patient-reported end points
Authors: Law Ernest , Gavanji Roya , Walsh Sarah , Haltner Anja , McTavish Rebecca , Cameron Chris
Published: November 2021

Aim:
To assess the relative impact of palbociclib plus fulvestrant (PAL + FUL) and abemaciclib plus fulvestrant (ABEM + FUL) on patient-reported outcomes in patients with hormone receptor-positive, HER2-negative (HR+/HER2-) advanced breast cancer.
Patients & methods:
Anchored matching-adjusted indirect comparisons were conducted using individual patient data from PALOMA-3 (PAL + FUL) and summary-level data from MONARCH-2 (ABEM + FUL). Outcomes included the European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 items (EORTC QLQ-C30) and its breast cancer-specific module (QLQ-BR23).
Results:
Significantly different changes from baseline favoring PAL + FUL compared with ABEM + FUL were observed in global quality of life (6.95 [95% CI: 2.19–11.71]; p = 0.004) and several functional/symptom scales, including emotional functioning, nausea/vomiting, appetite loss, diarrhea and systemic therapy side effects.
Conclusion:
PAL + FUL was associated with more favorable patient-reported outcomes than ABEM + FUL in patients with HR+/HER2- advanced breast cancer.
A METHODOLOGICAL FRAMEWORK FOR RESEARCH OF ERGONOMIC RISK FACTORS IN DENTISTRY
Authors: Bijelić Bojan , Grozdanović Miroljub , Stojiljković Evica
Published: November 2021

This paper proposes a methodological framework for the research of ergonomic risk factors in dentistry, since this is a profession with very specific and complex ergonomic challenges. When analyzing ergonomic risk factors in dental practice, three separate entities should be taken into account: the dentist, as the central figure in the office; the dental office equipment, which includes all the instruments and devices, dental chair and dentist stool; and the dental office, including the workplace layout and the working conditions. Bearing in mind that it is impossible to eliminate the risk, systematic analysis of ergonomic risk factors enabled us to propose solutions for its reduction. Risk reduction improves dentists’ work ability and working conditions in the dental office and contributes to a more humane, i.e., more functional design of dental equipment.
Desarrollo de nuevos fármacos por computadora
Authors: Bello Martiniano
Published: November 2021

En este artículo se aborda la utilidad de los métodos computacionales para la identificación y diseño de nuevos compuestos para el tratamiento de enfermedades. Asimismo, se describen los pasos cruciales para el empleo de estos métodos y se mencionan ejemplos de diferentes medicamentos de uso comercial, que han sido diseñados mediante dichas estrategias.
Thermal Energy and Power Production: Impact on the Global Environment
Authors: Sajith Vishnu
Published: November 2021

Abstract: Thermal energy is energy that comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature. In thermodynamic terms, Thermal energy is the internal energy present in a system in a state of thermodynamic equilibrium by virtue of its temperature. Thermal energy cannot be converted to productive work as easily as the energy of the systems that are not in thermodynamic equilibrium. Matter is made up of molecules and atoms that are constantly moving. The increase in temperature causes these particles to move faster and collide with each other. The hotter the substance, the more its particles move, and the higher its thermal energy. Thermodynamics is the branch of physics that deals with the relationships between heat and other forms of energy. That is, thermodynamics involves measuring thermal energy. ➣ In this paper we will be talking about the primary concepts of thermodynamics related to the formulation of thermal energy and then explain the correlation between thermal energy and thermal power. We also have included a CASE Study on the adverse Environmental effects of Thermal power production.
Satellite-Signal Dependence on Rain and Atmospheric Temperature
Authors:   Department of Physics, Mizoram University, Tanhril, Aizawl Mizoram, India, Naithani Ravindra , Jawhly Thaisa ,   Department of Physics, Mizoram University, Tanhril, Aizawl Mizoram, India, Tiwari Ramesh Chandra ,   Department of Physics, Mizoram University, Tanhril, Aizawl Mizoram, India
Published: November 2021

In this paper, we present the Ku band signal strength relationship with rain rate and temperature. The correlation analysis of rain intensity with signal data indicates that rain rate negatively impacts the Ku band link while the atmospheric temperature has a strong positive correlation with the received signal strength. The statistical analysis showed that both temperature and rain intensity significantly influenced the received-signal strength data. This study is a preliminary analysis and aims to draw the association between a Ku band signal with rain intensity and temperature.
Monitoring of PM10 Concentration and Evaluation of its Effect on Respiratory Diseases in Aizawl City, Mizoram
Authors:   Department of Environmental Science, Mizoram University, Lalruatliana Davy , tluanga Lalnun ,   Department of Environmental Science, Mizoram University, Lalzarzovi S.T. ,   Department of Environmental Science, Mizoram University
Published: November 2021

Particulate matter (PM), a primary component of air pollution has been implicated in various respiratory and cardiovascular diseases and was found to be the 13th leading cause of mortality worldwide by the World Health Organisation. The concentration of PM10 (Coarse particulate matters with aerodynamic diameter between 2.5–10 μm ) was assessed for Aizawl City, Mizoram for a period of two years from June 2014–May 2016. The annual mean concentration of PM10 was found to fall within the permissible limit of the National Ambient Air Quality Standard and was highest in Khatla station (71.67 µg/m3) followed by Bawngkawn station (39.75 µg/m3) and Laipuitlang station (33.25 µg/m3) and the lowest annual mean concentration was seen in Mizoram University station (0.85 µg/m3). Seasonal variations have been observed in the mean concentration of PM10 with the highest concentration in winter season (51.3µg/m3±28.27)and the lowest in monsoon season (22.58 µg/m3 ±2.37). Despite the low concentration of PM10, a strong association was found between PM10 exposure and three types of respiratory diseases namely Corrosion of respiratory tract (CORT), chronic obstructive pulmonary disease (COPD) and vasomotor rhinitis (VR).
Some Results and Examples on The Relation of Leray Equivalent and (Strong) Shift Equivalent
Authors:   Department of Basic Sciences and Social Sciences, North-Eastern Hill University, NEHU Campus, Shillong, India, Mn Mawiong Sainkupar
Published: November 2021

Using the concept of Leray functor and the way it is used to deﬁne the Cohomological Conley index, we deﬁne Leray equivalent, Leray shift equivalent, Leray elementary strong shift equivalent and Leray strong shift equivalent. We established their relationship with shift equivalent, strong shift equivalent and elementary strong shift equivalent. Then, we show that in the setting of Artinian and Noetherian module Leray equivalent implies strong shift equivalent.
Cardinal Metrics in Blockchain Functioning
Authors:   Department of CSE & IT, GD Goenka University, Gurgaon, India, Tiwari Anupam , Batra Usha ,   Department of CSE & IT, GD Goenka University, Gurgaon, India
Published: November 2021

Blockchain technology has been acquiring pace in deployments and implementations across globe vide association with large number of domains apart from widely known finance domain. These deployments are variegated in designs, have various architectures and possess functional differences. The commonality exists in deriving the benefits of blockchain technology through various technical variants of the widely known bitcoin blockchain architecture. Though still in evolving stage, the blockchain technology has been able to make an absolute mark in the industries, corporate and governance mechanisms to affirm that it’s part of a definite future. With devices estimate up to 50 billion in ecosystem of Internet-of-Things by 2025, the blockchain technology is soon going to be an integral part of future smart world. The deployment of any blockchain architecture might be able to accomplish the functional requirements as per design but the measurement of desired blockchain performance persists on a lot of parameters which need a balance and fine tuning established on purpose it has been designed for. In current times, transaction commit delays are being observed in bitcoin ecosystem. This paper identifies parameter effects on a bitcoin blockchain and measures the performance vide a bitcoin simulator effecting into tuning parameters like block size, blocks and number of nodes to analyze performance. The tuning effects into blockchain performance has been quantified, analyzed and discussed with focus on measuring and reducing the transaction propagation delays in a bitcoin environment. The paper concludes with heat map modeling plotted on Jupyter notebook with datasets derived.
DNA Barcoding Reveals Intra-Species Genetic Diversity of Amphiesma stolatum
Authors:   Department of Zoology, Mizoram University, Tanhril, India, zuala Lalbiak , Lalremsanga H.T. ,   Department of Zoology, Mizoram University, Tanhril, India, sanga Lalrin ,   Department of Zoology, Mizoram University, Tanhril, India, sanga Lalmuan , Vabeiryureilai Mathipi , sawma Romal
Published: November 2021

Amphiesma stolatum is a widely distributed snake species. But the intra-species genetic information is still limited from India. This paper provides the first-time barcode data of A. stolatum (cox1 and 16s rRNA) sampled from Mizoram State, India. We compare the newly generated sequences with the conspecies sequences from the Indo-Malayan region, and establishes its phylogenetic relationship with its sister genera. We diagnosed a total of five haplotypes from the cox1 gene fragment with 0.844 and 0.004 as the haplotype diversity (hd) and nucleotide diversity (Pi), respectively. The specimens from Mizoram showed a Kimura 2 parameter genetic distance of 0.21% (16s rRNA) and 1.05–1.22% (cox1) with the sequences from Guangdong Province, China; 1.22% (cox1) with the sequences from Hubei Province, China; 0.87–1.05% (cox1) with that from Taiwan; 8.05% with the specimen vouchered in the Natural History Museum, London. The mean intra-specific K2P distances are 4% and 0.36% in 16s rRNA and cox1, respectively. We also contribute new distributional records and elevational range, with notes on additional morphological data and occurrence of the two distinct morphs in Mizoram, Northeast India.
In-vitro Study on the Efficacy of Entomopathogenic Nematodes (Heterorhabditidae and Steinernematidae) for the Control of the Indian Cabbage White, Pieris canidia
Authors:   Department of Zoology, Pachhunga University College, Mizoram University College Veng, Aizawl, Mizoram, Department of Zoology, Mizoram University, Tanhril, Mizoram, Lalramnghaki H.C. , liana Lalram , liana Vanram ,   Department of Zoology, Pachhunga University College, Mizoram University College Veng, Aizawl, Mizoram, puia Vanlalhlim ,   Department of Environmental Science, Mizoram University, Tanhril, Mizoram, Lalremsanga H.T. ,   Department of Zoology, Mizoram University, Tanhril, Mizoram, Lalzarzovi S.T. ,   Department of Zoology, Mizoram University, Tanhril, Mizoram
Published: November 2021

Pieris canidia is one of the serious pests of cruciferous crops causing extensive damage to agricultural crops. Entomopathogenic nematodes (EPNs) therefore represent ideal candidates for biological control of the pest. In this study, the efficacy of four indigenous EPNs species, Heterorhabditis indica, Heterorhabditis baujardi, Steinernema sangi, and Steinernema surkhetense from Mizoram was evaluated against P. canidia under laboratory condition. Different concentrations of nematodes, 10, 25, 50, 100, and 200 infective juveniles per larva (IJs/larva) were used to evaluate larval mortality rate, host penetration rate, and progeny production in insect cadaver. All the four EPN species showed high pathogenicity against the pest for different nematode concentrations and observation periods. At a concentration of 200 IJs/larva, cent percent mortality of the pest was recorded at 72 hr post-incubation for S. surkhetense, 96 hr for S. sangi and H. indica, and 120 hr post-incubation for H. baujardi. Based on the values of LC50 and LT50, H. indica was the most pathogenic among the four nematode species while S. sangi was the least pathogenic. After 24 hr of incubation, the LC50 values of H. indica, H. baujardi, S. surkhetense, and S. sangi were 88.60, 98.29, 113.26 and 95.61 IJs/larva, respectively. At 10 IJs/larva, the LT50 values of H. indica, H. baujardi, S. sangi, and S. surkhetense were 88.12, 90.69, 88.102.30, and 88.11 hr, respectively. The study also disclosed that all the four EPN species successfully infect the pest and showed high rate of penetration into the host. Furthermore, all the nematode isolates were capable of producing large numbers of IJs in larval cadaver of P. canidia that significantly varies between the EPN species. The isolate H. baujardi produced the highest number of IJs followed by H. indica, S. surkhetense, and S. sangi. Our findings therefore reveal that all the four EPN isolates have the potential to be developed as biological control agents for P. canidia.
Sorption of Rhodamine B Dye onto Bentonite Clay-silane Composite Materials
Authors:   Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl, Mizoram, India, Malsawmdawngzela Ralte , liana Thanhming ,   Department of Chemistry, Pachhunga University College, Mizoram University, Aizawl, Mizoram, India, Tiwari Diwakar ,   Department of Chemistry, Mizoram University, Aizawl, Mizoram, India
Published: November 2021

The aim of this communication is to assess the sorption behavior of silanes grafted bentonite composite materials for Rhodamine B (RhB) from aqueous solution. The nanocomposites were synthesized by functionalization of the bentonite with 3-mercaptopropyltrimethoxysilane and 3-aminopropyltriethoxysilane under inert atmosphere. The batch experimental data indicated that the composite materials showed high percentage removal of RhB over a wide pH range, i.e., pH ~4.0 to 10.0. A high percentage removal of RhB was achieved within the concentrations studied from 1.0 to 25.0 mgL-1. Langmuir and Freundlich adsorption isotherm were obtained using equilibrium state sorption data. The equilibrium sorption was attained within 180 min of contact and the kinetic model best fitted the pseudo-second-order model. Further, the change in background electrolyte (NaCl) concentrations from 0.0001 to 0.1molL-1 NaCl and the presence of co-existing ions do not significantly affect the sorption of RhB by the composite sorbents except for EDTA.
Computational Technique for Interlinking of Dam Sites
Authors:   Department of Computer Engineering, Mizoram University, Aizawl, Mizoram, Hmingliana Lal , Nath Amitabha ,   Department of Information Technology, N.E.H.U, Shillong, Meghalaya, Rao Ch.Udaya Bhaskara ,   Department of Goegraphy & Resource Management, Mizoram University, Aizawl, Mizoram, Saha Goutam ,   Department of Information Technology, N.E.H.U, Shillong, Meghalaya, Amitab Khwairakpam ,   Department of Information Technology, N.E.H.U, Shillong, Meghalaya
Published: November 2021

In this paper, an attempt has been made to interconnect the 32 dam sites within Tlawng Watershed in the state of Mizoram. Computational technique for interlinking of dam sites has been proposed for the purpose. The elevation of dam and the distance between dams are the main parameters considered. We tried to establish a path among dams that would maximize the area coverage, starting from the highest elevation to lowest elevation. An attempt has also been made to incorporate additional dams along this path depending on the distance and elevation. It was found that 11 dam sites could be connected out of 32 dam sites. Interlinking of dams would be highly suitable in hilly region like Mizoram due to dissimilarity of height of different dams (elevation factor) and naturally gravity could be used as a means of water transfer among the interconnect dams.
Descubrimiento y rescate del Cementerio General de Santiago. Sus animitas, tumbas y santuarios en la Ruta Milagrosa de la Ciudad de los Muertos
Authors: Domínguez Balmaceda Tomas
Published: November 2021

Describiremos las herramientas y metodologías diseñadas y aplicadas para el descubrimiento y el rescate de los valores culturales del Cementerio General de Santiago. La realización de un Plano, de un Catastro Patrimonial, de las Evaluaciones Cuantitativas y Cualitativas y la investigación bibliográfica, son las herramientas para un trabajo que ha demostrado muy variadas utilidades como la creación de un decreto de monumento nacional, el control de una emergencia sísmica o la creación de rutas de turismo cultural. De este último punto nace una línea temática denominada la Ruta Milagrosa que está compuesta por dos santuarios populares como el Cristo Rico y el Cristo Pobre, y por afamadas tumbas o animitas milagrosas, como los mausoleos de Abelardo Núñez y de José Manuel Balmaceda y las sepulturas de la Carmencita, Romualdito y de la Novia.
Quand l’urbanité joue l’informel: l’intervention artistique aux confins du paysage urbain
Authors: Lafontaine Simon
Published: November 2021

Este artículo interroga el concepto de informalidad mediante la problemática general de la medialidad, que contempla los procesos de sedimentación, de circulación y de producción de la cultura urbana. Partiendo de las grandes líneas de una crítica del funcionalismo en arquitectura, el autor presenta una interpretación dinámica del paisaje urbano tomando en cuenta las dimensiones materiales, conceptuales, relacionales y vividas que componen el espacio de las ciudades postindustriales. Un caso de intervención artística, las Hypothèses d’amarrages (Hipótesis de amarraduras) del colectivo SYN-, ilustra entonces que la vida urbana tiene su profundidad propia, potenciando trayectorias culturales múltiples. Al delimitar las formaciones tácitas que constituyen la vida cotidiana, la informalidad ofrece una mirada hacia la encrucijada cambiante entre el exterior y el interior del paisaje urbano.
Beautiful losers
Authors: Miranda Pablo , Rodríguez Torrent JUAN CARLOS
Published: November 2021

Rentabilidad, eficiencia y productividad, son discursiva y fácticamente parte de los rasgos de la generación de un orden que se impone para direccionar la vida social y económica de la población, y por tanto, la regula y coacciona en cuanto marca el juego de oportunidades dentro de un campo de posibles. Esas formalizaciones, en el ámbito de las comunidades de trabajadores, no son más que expresiones que nos hablan de la construcción de las nuevas relaciones laborales y de particulares interacciones sociales, que a su paso dejan, como cuestión agregada, y que inicialmente no interesa calcular en los programas de modernización institucional y tecnológica, un ingente proceso de exclusión social, de fortalecimiento de nuevas periferias, y de la emergencia de hombres y mujeres que no encuentran su lugar y se quedan sin lugar.
La imagen construida a partir del discurso. Foro inseguridad vs seguridad: el caso del cierre de calles en Ciudad Juárez
Authors: Méndez Aranda Nibia Verónica
Published: November 2021

En atención a los incrementos de homicidios registrados por el INEGI y CONAPO en Ciudad Juárez, Chihuahua, México, durante el 2008 se registró una alza respecto a los años anteriores reportando una estadística de 1,569 ejecuciones, los cuales aumentaron a 2,372 durante el 2008, año donde se alcanzó su máxima representación, seguido del año 2010 con unos 2,218 homicidios y en el 2011 con 2,015  dentro de este territorio. A finales del año de 2007 al 2012, el Plan Estratégico de Ciudad Juárez (asociación civil) convocó a través de la Red de Vecinos a debatir el problema de la inseguridad para dialogar con representantes de instancias gubernamentales, los ciudadanos y líderes de las calles cerradas. Y así analizar la realidad de la frontera con la finalidad de conocer sus derechos y posturas en relación a la inseguridad. El proceso de transformación  y apropiación del territorio que tiene como peculiaridad inicial el cercado por iniciativa de los propios vecinos, mediante la instalación de barreras físicas y simbólicas en busca de una mayor seguridad. Esto es una reacción de autodefensa que representa a sensación de miedo por parte de los sujetos que lo habitan al sentirse desprotegidos.Se presenta un análisis del discurso en base a los relatos expuestos a partir de lo que gente habla en relación con sus sentimientos, apoyado por la semántica de los diferentes textos que analizan su contenido para poder conocer la situación de miedo, inseguridad y violencia de Ciudad Juárez a través de imaginario urbano que se simboliza con el cierre de calles por medio de las diferentes percepciones y respuestas subjetivas de los vecinos e integrantes del foro.
Valparaíso: memoria y olvido del mar
Authors: Ilabaca Gonzalo
Published: November 2021

Este artículo tiene por objetivo principal reflexionar sobre dos cosas importantes para el sufrido y castigado Valparaíso de hoy: el resguardo de la memoria —el patrimonio en todos sus significados— como elemento principal del arraigo, identidad y cultura local y el cómo generar economía en esta ciudad destruida generando una mejor ciudad para vivir y una mejor ciudad para invertir, a través del diseño y valor agregado del hábitat de Valparaíso, que nos pertenece a todos, porque la ciudad es una invención colectiva. Es decir, producir un cambio paradigmático a través del urbanismo para generar riquezas que llegue a todos y no seguir distribuyendo pobreza como hasta ahora, porque el sistema que rige el Valparaíso de hoy y de los últimos 50 años ha fracasado.
Flora de los acantilados Federico Santa María, Valparaíso, Chile
Authors: Ossa Barrientos Carmen Gloria , Maldonado Escobar Carlos
Published: November 2021

El presente estudio se enmarca dentro del proyecto de investigación financiado por FONDECYT, folio de inscripción N° 11190305 que se encuentra en curso, a cargo de la Dra. Carmen Gloria Ossa. Uno de sus objetivos es determinar la biología reproductiva del cactus columnar Echinopsis litoralis, que habita los Acantilados Federico Santa María (AFSM). Bajo este contexto llevamos acabo la identificación de la flora nativa presente en los acantilados, los cuales fueron donados originalmente para construir un santuario natural, y donde habitan diversas especies de flora de alto interés botánico, las que se encuentran en diverso grado de conservación y vulnerabilidad. La variedad medioambiental hace que convivan una gran riqueza y diversidad de especies, que es necesario cuidar y poner en valor, no solo científico, sino socio-cultural y educativo.
Repoblamiento de macro algas en áreas de usos intensivos como oportunidad de recuperación de servicios ambientales en espacios degradados
Authors: Baeza Sequeira Marcelo
Published: November 2021

Grandes esfuerzos se han realizado por parte del Estado para la protección de ecosistemas que prestan valiosos servicios ambientales, a través de diversas figuras de áreas protegidas, existiendo para ello marcos regulatorios en  constante revisión. Estos se concentran en áreas que se puedan reservar para un uso preferente de conservación. Por otra parte, existen también intentos para la recuperación de especies que constituyen recursos económicos de los cuales dependen una comunidad o una actividad económica determinada. Pero cuando se trata de ecosistemas en lugares que soportan usos intensivos distintos a los servicios eco sistémicos originales no se ve una orgánica similar que vele por su cuidado o restauración. Un proyecto de repoblamiento de macroalgas en áreas de usos intensivo se presenta como una oportunidad de recuperación de  servicios ambientales en espacios degradados, pero para su éxito debe sortear la dificultad de no contar con un marco regulatorio que avale dicha recuperación. Un cambio normativo que facilite e incentive la recuperación de ecosistemas es una oportunidad para resolver diversos conflictos ambientales.
Valparaíso, ciudad pionera en la investigación marina universitaria. El caso del buque oceanográfico Explorador
Authors: Skinner Huerta María Bernardita
Published: November 2021

La investigación oceanográfica en Chile es de larga data, destacando el especial impulso que tuvo durante la primera mitad del siglo XX, proveniente principalmente de las casas de estudio con sede en Valparaíso. El objetivo de este trabajo es relevar el papel de la Ciudad Puerto como precursora en la investigación oceanográfica, realizando una aproximación inicial a algunos de los hitos más relevantes acaecidos en su pasado reciente, específicamente entre las décadas del 40’ y del 70’ en torno a la creación de la Estación de Biología Marina de la Universidad de Chile en Montemar, Reñaca y a la consecuente construcción del primer buque oceanográfico universitario construido en Chile entre 1959 y 1961. La metodología utilizada para la obtención de datos se basó principalmente en entrevistas personales, testimonios escritos, documentación epistolar y de material gráfico que, por motivos de espacio y pertinencia no se presentará en su totalidad en este documento.
Fotografías de la pandemia, invisibilidades y apariciones: Florence Goupil y Claudio Santana
Authors: Martínez Rod Pamela
Published: November 2021

En este artículo se analiza el papel de la fotografía en la construcción del imaginario colectivo durante la pandemia del Covid-19. Nos proponemos trazar las relaciones existentes y a su vez evidenciar las discordancias entre las prácticas fotográficas de los medios de comunicación con las de los fotógrafos Florence Goupil y Claudio Santana. Mediante esta lectura analítica se busca evidenciar cómo estos artistas participan en la construcción de un contraimaginario de la pandemia que se diferencia del discurso homogéneo global al integrar los territorios al margen de los centros urbanos, de la política, del interés público y mediático. También busca evidenciar cómo consiguen replantear la pandemia desde una crisis bélica a una crisis social, con el foco en el cuerpo y en los cuidados, invitando a una lectura tanto ética como estética a través de sus fotografías. Estas propuestas consiguen traspasar los marcos comunicacionales y los estereotipos estigmatizantes de la enfermedad en la construcción de un discurso que reconoce y acoge distintas comunidades y las consecuencias que ha traído la irrupción de la pandemia, desestabilizando así, las imágenes dominantes ofrecidas por los medios de comunicación.
Institutionalism of economic federalism relations
Authors:   The Russian Presidential Academy of National Economy and Public Administration, Korotina Natalya
Published: November 2021

Introduction. The article deals with the problem of institutionalism of economic federalism relations. The institutional approach to studying economic federalism makes it possible to study economic federalism as a complex structured institution based on describing the interaction of the existing institutions of federalism, its structures and mechanisms. The purpose of the article is to consider economic federalism from the standpoint of the institutional approach. Methods. In the article, the author uses general scientific methods of analysis and synthesis, deduction and induction in the context of applying the institutional approach when studying the economic federalism relations. Scientific novelty. In the article, for the first time, the author highlights the elements of institutional regulation of the economic federalism system; has introduced the criterion for dividing the economic federalism institutions into formalized and non-formalized ones. Results. The author justifies the possibility of using the institutional approach when studying economic federalism, formulates the concept of “institution of federalism”, discloses the content of the institutional regulation of federal relations, presents for the first time the institutional design of the economic federalism system in terms of identifying subject areas and functions of economic federalism institutions, the spheres of institutionalization of economic federalism and economic consequences of institutional regulation. The author introduces the criterion of universality, which makes it possible to divide the institutions of economic federalism into formalized and non-formalized ones. Conclusions. The system of economic federalism presupposes the presence of institutions as stable norms, rules, procedures, organizational mechanisms governing the interaction of federalism participants, which gives the relations of economic federalism an institutional setting. Institutions of federalism both restrict and stimulate the dayto-day action of its participants. For the effective functioning of the economic federalism system, it is necessary to search for the optimal ratio of formalized (universal) and non-formalized (electoral) federalism institutions.
ANALISIS DATA INPUT FORCE PADA SHOCK ABSORBER DENGAN STRAIN GAUGE UNTUK MENGETAHUI PEMBEBANAN AKTUAL PADA MOBIL
Authors: Khariri Muhamad Ervin , Fitri Muhamad
Published: November 2021

Dalam dunia desain otomotif, khusunya pada bagian bodi kendaraan, diperlukan struktur yang kuat guna menjamin desain yang akan dijual ke masyarakat akan kuat dan tahan lama terhadap berbagai macam medan jalanan [7]. Untuk mengetahui seberapa besar gaya yang terjadi pada bodi kendaraan, dilakukan pengukuran input force di jalan secara aktual untuk mengetahui beban aktual yang membebani bodi kendaraan mengunakan sensor strain gauge. Tujuan dari penelitian ini adalah menganalisis pembebanan aktual pada bodi mobil secara teoritis (simulasi) dan aktual (pengujian). Penelitian dilakukan dengan melakukan simulasi pembebanan pada mobil menggunakan software DCS-100A dan DAS 100-A kemudian juga dilakukan pengujian aktual yang timbul di jalan sehingga diperoleh data dari keduanya dan dilakukan analisis perbandingan. Dari penelitian ini diharapkan dapat diperoleh data besarnya gaya aktual yang timbul pada berbagai macam medan jalan. Untuk kemudian ini dijadikan target pengembangan produk.
ELUCIDATING THE GONADAL DEVELOPMENT AND SEX DIFFERENTIATION OF THE RICE PADDY EEL, Monopterus albus (Zuiew, 1993), BASED ON GONADAL HISTOMORPHOLOGY AND STEROID HORMONE LEVELS
Authors: Pili Nisperos Dulce Marie , B. Ramos Gliceria
Published: November 2021

The establishment and survival of the population of species in their breeding ground can be attributed to the species’ reproductive characteristic and capacity. The Monopterus albus species is an introduced fish in the Philippines. It is a protogynous hermaphrodite which has a natural ability for sex reversal. This study describes the histomorphology of the different stages of gonadal maturation and determines the concentration levels of the steroid hormones 17ß-estradiol (E2) and testosterone (T) in the blood plasma. These aim to a further understanding on the gonadal development and sex differentiation of the rice paddy eel as a hermaphroditic fish. Fish samples were collected randomly from farm ponds located in three provinces within the island of Luzon, Philippines. The sexual identity of the fish was categorized based on the presence or absence of ovarian and testicular tissues. Histological analysis of the gonad showed that immature, maturing-matured female gonad exhibited ovarian tissues of varying stages. The intersex gonad showed the existence of both ovarian and testicular tissues. Enzyme-linked immunosorbent assay (ELISA) was used to determine the concentration levels of gonadal steroid hormones. Differences in the concentration levels of the two hormones were evident across all the stages of gonad maturation. The functional role of these hormones in vitellogenesis and spermatogenesis leads to the development of this sex-changing gonads. This reproductive characteristic contributes to our understanding of the reproductive success of hermaphroditic fish.
THE CHARACTERISTICS OF SAGO FROND SAP FROM TWO SELECTED GROWTH STAGES; ANGKAT PUNGGUNG AND UPONG MUDA PALMS
Authors: Matnin Nurazureen , Awang Adeni Dayang Salwani , Ahmad Muhammad Norhelmi , Suhaili Nurashikin
Published: November 2021

Sago frond is produced in abundance upon harvesting of the sago palms for starch extraction, hence need to be utilized and developed into beneficial products. In this study, the sap which contains sugars and starch is obtained by roller crushing the skinned frond for use as fermentation medium. Fronds from different growth stages (namely Angkat punggung and Upong muda) and different positions within the rosette (inner and outer circle) of the sago palm were studied. Based on the results, the outer circle frond of Upong muda palm gave the highest volume of sap at 290mL/kg which equivalent to 1600 mL/frond. On top of that, sago frond sap has an acidic pH, with glucose as major sugar component and contained various kinds of minerals like calcium, potassium and manganese. All fronds from different growth stages contain glucose between 28-68 g/L and xylose 21-29 g/L, respectively. After 21 days of storage, it can be concluded that the amount of reducing sugars and starch in all samples obtained from different growth stages remained almost unchanged from the original. Subsequently after this study, both fresh and stored sago frond sap can be used as a fermentation substrate without any modification.
STOCHASTIC MODELING AND SENSITIVITY ANALYSIS OF AN INTEGRATED HARDWARE-SOFTWARE SYSTEM SUBJECT TO DIFFERENT WEATHER CONDITIONS
Authors: Saini Monika , Kumar Ashish
Published: November 2021

The current study covenants with stochastic investigation of an integrated hardware-software system considering hardware failure, software up-gradation upon failure, precautionary maintenance (PM) after a pre-determined process time, maximum repair time of hardware and different weather conditions. All time dependent indiscriminate variables are arbitrarily dispersed. Some important reliability measures like MTSF, availability and revenue of the system are obtained by using well established techniques semi-Markov process. Regenerative point technique has also been taken into consideration during model development. Sensitivity analysis of these measures is also performed. Finally, empirical analysis is done to demonstrate the results for a specific case. To climax the significance of the study, graphs of MTSF, availability, profit and sensitivity are also depicted.
How independent directors affect firms’ performance and sustainability: An analysis of Italian firms
Authors: Mirone Francesco , Sancetta Giuseppe , Sardanelli Domenico , Mele Salvatore
Published: November 2021

The role of independent directors has been for years in the spotlight of international studies. This phenomenon, which was initially a prerogative of corporations of English-speaking countries, over the last two decades has rapidly spread across Europe, where several countries have introduced specific regulations, borrowing from international best practices. Board independence is thought to buffer the firms against opportunistic behavior (Masulis & Zhang, 2019). This study aims to analyze how independent directors contribute to the decisional processes within Italian boards of directors and to the development of the firms to which they belong. The research hypotheses were formulated based on bibliometric analysis and then they were validated through both a desk analysis and survey data. Therefore, the hypotheses were first connected to the data included within the Assonime reports on corporate governance in Italy in the last 4 years. Then, a quantitative analysis was conducted through a structured survey, administered to a sample of 65 independent directors of Italian firms and belonging to Nedcommunity, the Italian association of non-executive and independent directors, in order to examine the self-perception of independent directors about their own role and effectiveness. This work, combining the structural and the behavioral views, aims at contributing to the literature concerning the impact and the efficacy of independent directors. The findings confirm that the presence of independent directors has a positive effect on corporate performance, on the protection of shareholders’ interests, and especially on the adoption of CSR policies.
Chirality-Helicity of Cumulenes: A Non-Scalar Charge Density Derived Perspective
Authors: Xing Hui , Azizi Alireza , Momen Roya , Xu Tianlv , Kirk Steven , Jenkins Samantha
Published: November 2021

We investigate the presence of helical character and chirality using a
vector-based charge density perspective instead of energetic or
structural measures. The vector-based perspective of the chemical
bonding, constructed using the most preferred direction of charge
density accumulation, finds the presence of induced symmetry-breaking
for α,ω-disubstituted [4]cumulenes as the end groups are torsioned.
The stress tensor trajectories Tσ(s) are used to provide the additional
symmetry-breaking required to quantify the degree and nature of the
chirality and helical character. We find an absence of chirality for
[4]cumulene but a very significant degree of axiality as
demonstrated by the purely axial form of the Tσ(s) indicating a lack of
helical character. The S-1,5-dimethyl-[4]cumulene contains a very
low degree of chiral character but significant axiality(helicity)
resulting in a weakly helical morphology of the corresponding Tσ(s). The
(-)S(-), (+)S(-) and (+)S(+) conformations of
S-1,5-diamino-[4]cumulene contain very significant degrees of both
chirality and helical character resulting in helical morphology of the
corresponding Tσ(s). The chirality assignments are in agreement with the
Cahn–Ingold–Prelog (CIP) classifications for the (-)S(-), (+)S(-) and
(+)S(+) conformations of S-1,5-diamino-[4]cumulene. We discuss the
consequences for the Tσ(s) in locating chiral character in these
molecules in future experiment investigations.
Compound motor action potentials in transient and persistent phrenic nerve injury - metanalysis.
Authors: Kuniewicz Marcin , Kowalski Marcin , Rydlewska Anna , Karkowski Grzegorz , Jackob Nicholas , Lelakowski Jacek
Published: November 2021

Background: The right phrenic nerve is vulnerable to injury (rPNI)
during cryoballoon ablation (CBA) isolation of the right pulmonary
veins. The complication can be transient or persistent. The reported
incidence of rPNI fluctuates from 4.73% to 24.7% depending on changes
over time, CBA-generation, and selected protective methods. Methods:
Through September 2019, a database search was performed on MEDLINE,
EMBASE, and Cochrane Database. In the selected articles, the references
were also extensively searched. The study provides a comprehensive
meta-analysis of the overall prevalence of rPNI, assesses the transient
to persistent PNI-ratio, the outcome of using compound motor action
potentials (CMAP), and estimated average time to nerve recovery.
Results: From 2008 to 2019, 10,341 records from 48 trials were included.
Out of 783 eighty- PNI (7.7%), 589 (5.7%) were transient, and 194
(1.9%) were persistent. CMAP caused a significant reduction in the risk
of persistent PNI from 2.3% to 1.1% (p = 0.05; odds ratio [OR]
2.13) in all CBA groups. The mean time to rPNI recovery extended beyond
the hospital discharge was significantly shorter in CMAP group at three
months on average versus non CMAP at six months (p = 0.012). CMAP (in
contrast to non-CMAP procedures) detects PNI earlier from 4 to 16 sec (p
< 0.05; I2 = 74.53%) and 3 to 9º (p < 0.05; I2 =
97.24%) earlier. Conclusions: rPNI extending beyond hospitalization is
a relatively rare complication. CMAP use causes a significant decrease
in the risk of prolonged injury and shortens the time to recovery
Optimization of chromatographic separation of aripiprazole and impurities: Quantitative structure-retention relationship approach
Authors: Svrkota Bojana , Krmar Jovana , Protic Ana , Zecevic Mira , Otasevic Biljana
Published: November 2021

A new optimization strategy based on the mixed quantitative structure? retention relationship (QSRR) model is proposed for improving the RPHPLC separation of aripiprazole and its impurities (IMP A-E). Firstly, experimental parameters (EPs), namely mobile phase composition and flow rate, were varied according to Box?Behnken design and thereafter, an artificial neural network (ANN) as a QSRR model was built correlating EPs and selected molecular descriptors (ovality, torsion energy and non-1,4-van der Waals energy) with the log-transformed retention times of the analytes. Values of the root mean square error (RMSE) were used for an estimation of the quality of the ANNs (0.0227, 0.0191 and 0.0230 for the training, verification and test set, respectively). The separations of critical peak pairs on chromatogram (IMP AB and IMP D-C) were optimized using ANNs for which the EPs served as inputs and the log-transformed separation criteria s as the outputs. They were validated by application of leave-one-out cross-validation (RMSE values 0.065 and 0.056, respectively). The obtained ANNs were used for plotting response surfaces upon which the analyses chromatographic conditions resulting in optimal analytes retention behaviour and the optimal values of the separation criteria s were defined. The optimal conditions were 54 % of methanol at the beginning and 79 % of methanol at the end of gradient elution programme with a mobile phase flow rate of 460 ?L min-1.
Antibacterial properties of thalloid liverworts Marchantia polymorpha L., Conocephalum conicum (L.) Dum. and Pellia endiviifolia (Dicks.) Dumort
Authors: Ivkovic Ivana , Bukvicki Danka , Novakovic Miroslav , Ivanovic Stefan , Stanojevic Olja , Nikolic Ivan , Veljic Milan
Published: November 2021

The antimicrobial activity of methanol extracts of three thalloid liverworts, Marchantia polymorpha, Conocephalum conicum and Pellia endiviifolia and bis-bibenzyl marchantin A, the most dominant compound in the methanol extract of M. polymorpha, have been investigated in this research. 1H-NMR spectroscopy revealed that the M. polymorpha and P. endiviifolia extracts of liverwort contain terpenes, oils, sugars and bis-bibenzyls, while these specific macrocyclic compounds were absent in the C. conicum extract. The antimicrobial potential was tested on eight bacterial strains. Antimicrobial effects of extracts and marchantin A were observed against Gram-positive bacteria, while they showed no effect against Gram-negative bacteria in both methods used ? well diffusion and broth microdilution.