bluuebunny/crossref_metadata_2025 huggingface dataset:
Solar Tracking Systems – A Review
Authors: Priyam Abhishek
Published: February 2024

The biggest challenge and concern for the upcoming 50 years is the idea of power generation, by making less use of the fossil fuels. The idea of solar energy as fuel, and the fact that we can convert freely available energy which we receive from the sun into usable energy, is fascinating, and is probably at the highest priority at the moment as compared to other renewable energy sources. Although solar energy as fuel is the go-to form of green energy, it is faced with some problems. The two main problems are, first, it is geographically constrained and second is that it is nearly impossible to collect a hundred percent heat energy from the sun at every single point of the day. This happens because the relative angle of the sun changes continuously with respect to the earth. This leads to a problem. The watts delivered by the solar panels gets reduced. Thus, it gets more challenging to generate power. To overcome this problem, developers and researchers came up with an innovative solution, “Solar Trackers”. After a lot of studies and extensive research conducted on this technology, it can staunchly said that solar trackers are the best alternative as compared to static solar panels, for increasing the efficiency. In this paper different types of tracking systems, their setups and comparison in between their performances are reviewed. After carefully analysing and comparing different results obtained from different solar tracking systems, we can say that altitude and azimuth dual axis solar trackers are more coherent, accurate and efficient in collecting the radiation as compared to the traditional static solar panels and the single axis solar trackers. However, we should also consider the fact that the dual axis solar trackers are not pocket friendly and are not feasible to install compared with the single axis solar tracking system.
Identification of Different Features of the Reported Alternative Fuels using Exploratory Data Analysis (EDA)
Authors: Chakraborty Sudip , Deb Madhujit , Kumar Ranjan , Nath Sudipta
Published: February 2024

To reduce the carbon footprint in automobiles and other allied industries and to get rid of the dependency on exhaustible fossil fuels, researchers have been searching for alternatives to gain widespread acceptance. There are many performance and emission parameters on which a particular fuel (authentic/alternative) is dependent in terms of acceptability. So far, many researchers have reported a huge number of biofuels or biofuel blends that can be used as an alternative. In this study, the potential alternative fuels or biofuel blends are reviewed which were reported in different literature and are considered for Exploratory Data Analysis (EDA). An entire report is presented based on the features, this may help to identify biofuels for different operations. The correlations between the features are also investigated in this study, as well.
Impact of Effective Communication on Employees’ Performance in Mining Industries
Authors: Diwakar Prahaladaiah  , H. M. Udayakumar  , Soni Mukesh
Published: February 2024

The primary objective of the present study was to investigate how effective communication influences the performance of employees within the mining industries. Using a quantitative approach, the researcher opted for a survey-based method to gather primary data. This survey was conducted among employees in the mining sector to gauge their perceptions regarding the relationship between effective communication and employees performance. With a sample size of n=305, the data analysis from the survey demonstrated a positive correlation between effective communication and employees performance. The research culminated in a significant correlation test, showing statistical significance at the 0.01 level, with variables displaying high significance at P<0.05. Furthermore, in the linear multiple regression assessing five hypotheses, the Durbin Watson's value fell between 1.5 and 2.5, indicating that error deviations are uncorrelated and thus, acceptable. Consequently, the researchers concluded that effective communication indeed has a discernible impact on employees performance within mining industries.
Numerical Study of Nonlinear Convective Heat Transfer Flow of Metal Oxide Nanoparticle TiO2-Enhanced Fluid between Two Concentric Cylinders with Aggregation of Nanoparticles
Authors: N. Srikantha  , B. N. Veena  , M. Uma  , S. Sushma
Published: February 2024

The utilization of nanofluid is one of the most used techniques for improving heat transfer in applications like heat exchangers, heat storage systems, mining and nuclear power plants. Because of high thermal conditions, the density relation of the working fluids may not be linear, therefore, an analysis is conducted on the quadratic convection of nanofluid flow in a porous annulus region considering an inclination. The phenomenon of temperature-dependent viscosity on the flow, kinematics of nanoparticle aggregation, and heat transport phenomenon with Exponential Space-Related Heat Source (ESHS) and a Temperature-Related Heat Source (THS) are considered. The governing equations are solved numerically. The influence of key parameters is analyzed using 2D and 3D graphs.
Evaluation of Accumulation Potency of Arka Plant Varieties for Metals and Nutrients through Natural Biological Treatment
Authors: Bhavan Kumar  , K. Venkatesha Raju  , Godihal Jagdish H.
Published: February 2024

This study aims to evaluate the effectiveness of a natural biological treatment system for wastewater using Red soil, Arka Darshan, Arka Tilak, Arka Nirantara, and Arka Prajwal plants. The system employs clay as a natural nanomaterial for adsorption of substances such as nitrates, phosphates, potassium, and heavy metals. The soil contains numerous microorganisms that decompose organic matter into simpler compounds, while the plants use phytoremediation to uptake heavy metals and nutrients. The study measured the system’s efficiency in reducing Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Phosphate, Magnesium, Zinc, Nitrate, Sodium, and Potassium. The results showed that the system had an average efficiency of 98% in COD and 96% in BOD removal, and contributed an efficiency of 99% TSS and 46% TDS. The system also removed nitrates and phosphates, which cause eutrophication in water bodies, by 76% and 72%, respectively. Additionally, heavy metals like chromium, Nickel and Zinc were reduced by up to 81%, 71% and 59%. The study suggests that the natural biological treatment system is a sustainable and effective alternative to conventional wastewater treatment, particularly in sparsely populated rural areas. Therefore, we can conclude that this system has potential for wider adoption in treating wastewater.
Efficacy of Nanoparticles in Water Treatment
Authors: A. Shwetha  , Ramanna Nakul
Published: February 2024

Nanoparticles have emerged as a promising tool in water treatment due to their unique physicochemical properties, such as high surface area, reactivity, and selectivity. The use of nanoparticles in water treatment can enhance the efficiency and effectiveness of traditional water treatment processes, such as coagulation, flocculation, adsorption, and filtration. Nanoparticles can be functionalized with various surface chemistries, which enables their selective removal of specific contaminants, including heavy metals, organic compounds, and microorganisms. Nanoparticles can also be used as catalysts to promote the degradation of organic pollutants and disinfection of water. However, the use of nanoparticles in water treatment also presents challenges, such as potential toxicity to humans and the environment, and the need for effective nanoparticle recovery and disposal. Further research is needed to optimize the use of nanoparticles in water treatment and ensure their safe and sustainable application. This paper presents an overview of current trends in the utilization of Nanoparticles for water treatment/disinfection.
The synthesis and investigation of nanostructured catalysts for electrochemical systems with proton-exchange membrane
Authors:   National Research Center ", Grigor'ev S. A. ,   Kurchatov Institute"
Published: February 2024

Techniques of synthesis of high-effective nanostructured electrocatalysts for electrochemical systems with proton-exchange membrane (PEM) are described, their structural and electrochemical properties are investigated. Current-voltage curves of membrane-electrode assemblies (MEA) on the basis of synthesized electrocatalysts within PEM fuel cell, water electrolyser and reversible cell are obtained.
Lithium cathode deposition in sulfolane electrolytes on stainless steel electrode
Authors:   Institute of Organic Chemistry of the Ufa RAS Scientific Center, Kolosnitsyn V. S. , Ivanov A. L. ,   Institute of Organic Chemistry of the Ufa RAS Scientific Center, Karaseva E. V. ,   Institute of Organic Chemistry of the Ufa RAS Scientific Center
Published: February 2024

The effect of different lithium salts on the lithium behavior – cyclic cathode deposition and anodic dissolution – (cycling life) on stainless steel in sulfolane electrolytes is studied. It is shown that the overvoltage of electrode processes decreases in series LiBF4 > LiCF3SO3 > LiClO4 > Li2Sn. Maximum coulomb efficiency and cycling life of lithium are obtained in lithium polysulfides electrolyte solution.
Research and diagnostics of the lithium power sources by the method of electrochemical noise. II
Authors:   Institute of Physical Chemistry and Electrochemistry of A. N. Frumkina of RAS, Kanevskii L. S.
Published: February 2024

The problem of use discharge and noise characteristic of primary power sources system of thionyl chloride/lithium for definition of their operative conditions (first of all, depth of discharge) is considered. On the basis of the analysis of features of discharge curves of Li/SOCl2 cells both bobbin and wound (rolled) type, and also intensity of voltage fluctuations and power-density spectrum of electrochemical noise of above mentioned cells it is drawn a conclusion on an opportunity of carrying out their correct diagnostics. The information received by considered methods can be used for an estimation of a condition of Li/SOCl2 cells, for example, for rejection of power sources is appreciable (more than on 60–80\%) depleted their resource.
Kinetics and mechanism of titanium and zirconium anodic behaviour in organic perchlorate solutions
Authors:   Maikop State Technological University, Popova A. A.
Published: February 2024

Kinetic patterns of thin anodic films formation for Ti and Zr in organic mediums are investigated. Influence of solvent nature and polarization is discussed by role surface complex consideration in oxide films growth on this metals.
Electrotechnical model of metal ceramic oxide nickel electrode pore
Authors:   All-Russian Research and Design Institute of an Elektrovozostroyeniye (JSC VELNII), Smetankin G. P. , Matekin S. S. ,   All-Russian Research and Design Institute of an Elektrovozostroyeniye (JSC VELNII), Burdyugov A. S. ,   All-Russian Research and Design Institute of an Elektrovozostroyeniye (JSC VELNII)
Published: February 2024

Electric circuit of substitution of metal-ceramic oxide-nickel electrode pore that allows to make computer simulation of current distribution in the pore depth during asymmetrical current polarization and simulation results are given. The range of asymmetrical current parameters chosen due to the simulation results provides required current distribution in the pore depth with minimum cost of charging device that increases economic force of attraction of processing method implementation during manufacturing and exploitation of batteries with asymmetrical current.
The influence of the specific energy, service life, resource on relative cost of the chemical power sources
Authors:   JSC NIAI Istochnik, Bayunov V. V. , Kolikova G. A. ,   JSC NIAI Istochnik, Krivchenko G. V. ,   JSC NIAI Istochnik
Published: February 2024

The influence of the specific energy, service life, resource on relative cost decreasing of the chemical power sources is considered.
Composite lithium-conductive electrolytes based on sopolymer PVDF-HFP and solid electrolyte Li1.3Al0.3Ti1.7(PO4)3
Authors:   Institute of high-temperature Electrochemistry UB of RAS, Andreev O. L. , Druzhinin K. V. ,   Institute of high-temperature Electrochemistry UB of RAS
Published: February 2024

The intention of this work was to study transport properties of lithium conducting composite polymer electrolytes. The study was carried out on the polyvinylidenefluoride – hexafluorpropylene containing Li1.3Al0.3Ti1.7(PO4)3 solid electrolyte over the range 20 to 80% (vol.) at 20–150°C. It was established that activation energy of lithium conductivity increases with fraction of copolymer. It has been found that concentration dependence of conductivity obeys the modified equation of mixing. The conductivity values of composite polymer electrolytes was established to be noticeably lower than that of ceramic sample of pure Li1.3Al0.3Ti1.7(PO4)3. It has been shown that solid electrolyte addition decreases glass transition temperature of polymer matrix.
Phase composition, electric conductivity, stability of solid electrolyte ZrO2–Sc2O3 and ZrO2–Sc2O3–CeO2 systems' characteristics in area of low content of Sc2O3 and CeO2
Authors:   Institute of high-temperature Electrochemistry UB of RAS, Karavaev Y. N. , Neuimin A. D. ,   Institute of high-temperature Electrochemistry UB of RAS, Plaksin S. V. ,   Institute of high-temperature Electrochemistry UB of RAS
Published: February 2024

Phase composition, electric conductivity, stability of characteristics of a number ofspecimens of systems ZrO2-Sc2O3 (4.5–6.0 mol. %) and with addition 1 mol.% CeO2, prepared by usual ceramic method at the sintering temperature of 1800°С (in a vacuum) with subsequent annealing at the temperature of 1150°С (in air) were investigated by methods of X-ray investigation, temperature dependence of electric conductivity (350–750°C), cyclic resort tests at the temperature of 700°C. It was determined that in binary composition along with basic tetragonal phase there is a phase on basis of monoclinic ZrO2, which quantity recreases under the «prints» level with an increase of Sc2O3 content. CeO2 contributes to tetragonal models structure forming and increases its electric conductivity. At increased content of Sc2O3 and presence of addition of CeO2 observes tendency to cubic phase forming. It could be caused by separate grains with cubic structure presence or some content of high-temperature modification of tetragonal structure – T'-phase. Observed changes of structural and electrical characteristics of solid electrolyte when using long resort tests (900 hours) are caused by establishment of stable phase structures (for this temperature) and values of electric conductivity under its decreasing as a result of accumulation of grains of electrolytes phase sediments with decreased electric conductivity on a surface. CeO2 reduces degradation of tetragonal structure including its high-temperature modification – T'-phase. Explored solid electrolytes have high-enough stability of determined electrical characteristics with exception of examples with noticeable content of monoclinic phase.
Search algorithm based on the phase trees (crystallization trees) of the solt systems for chemical sources of electric current
Authors:   Samara State Technical University, Garkushin I. K. , Egortsev G. E. ,   Samara State Technical University, Istomova M. A. ,   Samara State Technical University
Published: February 2024

Search algorithm based on the phase trees of the multicomponent systems for compositions with given properties (melting temperature, melting enthalpy, electroconductivity, etc.) was developed. The algorithm was evaluated on a tetracomponent reciprocal system Li,K||F,Br,WO4. Ternary system LiF–LiBr–Li2WO4, ternary reciprocal system Li,K||Br,WO4, stable secant triangle LiF–Li2WO4–KBr and stable tetrahedron LiF–LiBr–Li2WO4–KBr were experimentally investigated. Discovered low-melting compositions can be recommended to use as molten electrolytes for chemical sources of electric current.
Catálogo de la biota acuática del Lago de Tota (Boyacá - Colombia)
Authors: Pedroza Ramos Adriana , Rozo Suárez Sara
Published: February 2024

El lago de Tota es un cuerpo de agua, que presenta características únicas de origen, tamaño, y funcionamiento, que ha promovido grandes beneficios al desarrollo social y económico de la región, lo que lo convierte en un ecosistema estratégico en los Andes Tropicales.  Uno de los aspectos quizá menos apreciado de este ecosistema es la asombrosa expresión de biodiversidad de organismos acuáticos que allí habita.  Este catálogo presenta una primera recopilación de información acerca de la diversidad de grupos de organismos acuáticos que generalmente son poco conocidos pero que son de extraordinaria belleza y además cumplen funciones esenciales en la dinámica e integralidad de este tipo de ambientes:  el fitoplancton, zooplancton y zoobentos.  Los capítulos contienen una descripción general de la biología y diversidad de los grupos acompañada de fotografías y descripciones originales de representantes de cada uno, con un breve referente taxonómico y ecológico.
Fiscal Measures to Support Post-Pandemic Resilience
Authors: Jayant Menon , van Gass Conrad , Amara Ekeruche Mma , Cooke Edgar , Ahmed Saira , Meeker Jessica
Published: February 2024

Now that the dust has begun to settle on the Covid-19 pandemic, it is time to reflect on and draw lessons from country experiences in pandemic response, in relation to fiscal management and reform. In order to apply these lessons, countries will require increased fiscal space to enable them to implement social safety nets that help balance the trade-off between livelihoods on the one hand, and health and the economy on the other. What follows in this Research for Policy and Practice Report is a collection of studies supported by the Covid-19 Responses for Equity (CORE) Programme. These studies provide solid evidence from a diverse range of cases, each with varying contexts and constraints, about fiscal policies and macroeconomic reforms that could support crisis response. Improved tax collection and better management of fiscal resources could enable improved social and physical infrastructures, as well as improved social safeguards and safety nets. These considerations should be part of an improved response when the next pandemic hits.
THE POTENTIAL APPLICATIONS OF US MRNA VACCINES IN CHINA AND IMPLICATIONS FOR A “UNIVERSAL” COVID VACCINE
Authors:   The Stony Brook School, Stony Brook, United States of America, Xiang Nan
Published: February 2024

The resurgence of Covid outbreak in China at the start of 2023 with the new XBB variants made people question the effectiveness of the Sinopharm vaccine. In this paper, I tried to investigate the applicability of the US mRNA vaccinations in the Chinese population, and the implication of the development of a universal Covid vaccine. I blasted the selected BA.2.12.1 strain’s genome and spike protein sequences of China’s, Japan’s and the US’s (NY, CA, WA and AZ) strains from the NCBI SARS-CoV-2 database. Blast results showed a high percentage (>0.95) of alignment among the complete genome and spike protein sequences from all the selected regions, which supported the ideas of the applications of one mRNA vaccine to target the dominant strain in different countries. On the other hand, the identification of certain point mutations (R343T, G679R) in the functional and structural part of the spike protein underlined the high mutability of the virus as it spreads across continents. These findings suggested that while mRNA vaccines could be more effective for the prevailing strain in China and potentially the rest of the world, in order to make a firm conclusion and medical plan for the implementation, it still required additional trials and research with more data.
Gender and policies on paid family care: Overview of debate and theoretical reflections
Authors: Eggers Thurid , Grages Christopher , Pfau-Effinger Birgit
Published: February 2024

Objective: This article discusses the implications of systematically including policies on paid family care in the concept of care policy for older people for theorizing the relationship between such policies and gender inequality. Background: In theoretical debates about the relationship between gender and care policy, most welfare state researchers agree that policies that support extra-familial care promote women’s participation in formal, paid work and can thus reduce gender inequality. By contrast, the role of policies that offer pay and elements of social security for family care in promoting gender equality is up for debate. Method: This article addresses the aforementioned debates’ key arguments by discussing the relationship between gender equality and care policies that actively support family caregivers. The argument is contextualized with examples of empirical findings from the literature. Results: We argue that, to some degree and under specific conditions, new policies on paid family care have the potential to reduce gender inequality. Conclusion: The article contributes to theoretical debates about gender and care policy by evaluating the implications of systematically including policies on paid family care in the study of care policy. This inclusion could clarify the circumstances under which policy support for family caregivers can contribute to fostering gender equality.
Ship Lateral Plate Stiffening and Longitudinal Support Structure
Authors: Okello Moses Oyaro
Published: February 2024

It is commonly recognized that a ship’s ability to maintain stability is dependent upon the way its loads are distributed. This means making sure the center of gravity is sufficiently low and evenly distributed. Yet when a ship encounters turbulent water with extremely large wave amplitudes, load distribution is a critical factor in determining how stressed the ship becomes. In particular, this article examines several methods for increasing the ship's longitudinal strength to prevent ship structural damage during hogging and sagging. This research presents a number of proposed techniques to enhance the longitudinal strength of cargo ships in order to guarantee minimal stress and deformation during sagging and hogging. The first method is the stern-to-bow use of curved support structures to increase the longitudinal strength of a cargo ship. And another way to stiffen the lateral plate is the proposed use of different designs of the side plate, such as wavy curves, stars, etc. To further boost the strength, the lateral plate upper part is suggested to curve upward. A numerical simulation using ANSYS of the stiffened plate when subjected to uniform load distribution and fixed support on either end shows that there is a decrease in deformation of the plate when we use wavy curved plates compared with those of the other plate stiffening methods used, and furthermore, curving the plate on top increases its strength during sagging as well as hogging. Finally, the use of a curved support structure further enhanced the overall longitudinal strength of the vessel.
Inference Analysis of Video Quality of Experience in Relation with Face Emotion, Video Advertisement, and ITU-T P.1203
Authors: Selma Tisa , Bentaleb Abdelhak , Masud Mohammad Mehedy , Harous Saad
Published: February 2024

With end-to-end encryption for video streaming services becoming more popular, network administrators face new challenges in preserving network performance and user experience. Video ads may cause traffic congestion and poor Quality of Experience. Because of the natural variation in user interests and network situations, traditional algorithms for increasing QoE may face limitations. To solve this problem, we suggest a novel method that uses user facial emotion recognition to deduce QoE and study the effect of ads. We use open-access Face Emotion Recognition (FER) datasets and extract facial emotion information from actual observers to train machine learning models. Participants were requested to watch ad videos and provide feedback, which will be used for comparison, training, testing, and validation of our suggested technique. Our tests show that our approach beats the ITU-T P.1203 standard in terms of accuracy by 37.1%. Our method provides a hopeful answer to the problem of increasing user engagement and experience in video streaming services.
Theoretical and Numerical Investigation of Mechanical Properties of Auxetic S-structure under Transverse Load
Authors: Mondal Prasanna , R. Jayaganthan
Published: February 2024

A significantly reduced stress concentration effect and a stable deformation behavior are exhibited by the arc-like S-shaped auxetic structure. Analytical works beyond the bar and hinge method to capture structural effects, such as bending, shearing, etc., in the S-structure are scarce in the literature. The deformation pattern of the S-structure is dominated by bending and shearing within the linear elastic region. In this work, Timoshenko beam theory is used to derive closed-form expressions for overall elastic modulus and Poisson’s ratio. This agrees well with the results of finite element simulations. An adjusted R-square value of over 0.99 and almost 0.82 is obtained for elastic modulus and Poisson’s ratio, respectively. From parametric studies, it’s established that under quasi-static transverse load, strut thickness and the angle `α’ are the most important parameters for controlling elastic modulus, specific energy absorption, negative Poisson’s ratio (NPR) effect, and relative density of the entire auxetic structure. Also, it’s found that energy absorption and elastic modulus increase together. Interestingly, the elastic modulus of the structure under transverse load lies in the range from 3 MPa to 250 MPa, which means this structure is compliant enough and can be used in cushioning, packaging, soft robotics applications, etc.
Cloud-Based Control and Monitoring of a Virtualized Process of Loading Gunpowder into Drums and Subsequent Packaging Managed by ERP
Authors: Romero Gómez Sergio , Guerrero-González Antonio , García-Córdova Francisco , Cumbicus Wilmer E.
Published: February 2024

This paper presents the design and implementation of a remote supervision and control system for a gunpowder drum filling plant. The use of technologies such as SCADA (Ignition), IoT (Node-RED), ERP (Odoo) and digital twins (Factory I/O) to achieve remote monitoring and operation of the plant is described. The solution allows full control of the production process from any location through customized graphical interfaces. The challenges encountered in integrating multiple systems and platforms are discussed, along with the security measures implemented within the Azure cloud environment. The results demonstrate the effectiveness of 4.0 technologies in automating and digitizing critical industrial processes. This research will lay the groundwork for the adoption of these approaches in companies seeking greater efficiency, traceability and safety in their operations. The experience gained allows us to successfully face the digital transformation in modern manufacturing.
Del Paraná de la Tierra al Paraná de Marte: propuesta del primer análogo planetario de Paraguay
Authors: Martínez Frías Jesús
Published: February 2024

Paraguay, con su biodiversidad única, ha sido objeto de 131 estudios geológicos. La colaboración entre REDESPA y la AEP, junto con la Universidad Nacional de Itapúa, ha dado lugar a iniciativas innovadoras, como el primer análogo paraguayo, destacando la riqueza geodiversa del país para contribuir a la investigación en geología planetaria y astrobiología.
Plan de negocio para la elaboración de mermelada hecha a base de kumquat en la ciudad de Lima
Authors:   , Ruiz Avila Linda Angell , Bendezu Flores Sandra Roxana , Curiel Ayuni Mario Alexis , Quispe Llacchua Flor Janet , Lavalle Bernuy Carlos Eduardo
Published: February 2024

El propósito de nuestro plan de negocio tiene como propósito mostrar los beneficios y propiedades únicas del consumo del fruto cítrico kumquat, cuyos orígenes provienen principalmente de los países de China y Japón. Para ello lo hemos incluido dentro del mercado peruano mediante la preparación de una mermelada hecha a base de kumquat. La elaboración de la mermelada irá acompañada de otras materias primas cómo: semillas de chía, limón, canela y se realizará de manera artesanal en las instalaciones de la empresa MERMELADA NATURISTA SAC ubicada en el distrito de Cercado de Lima. Para luego proceder con el envasado y distribución del producto con el nombre comercial MERMELADA KUMQUAT en los puntos de venta a nivel distrital.
Plan de marketing: ropa biodegradable "Bio Style"
Authors:   , Rodriguez Izquierdo Melany Karyn , Ferrua Cachay Naomy Franshesca , Castillo Calderon Valeria Naomi , Guerra Espinoza Jean Piero , Velazco Polo Sebastian Andre
Published: February 2024

La preservación ambientalista es un asunto que no solo interesa a ciertos grupos conservacionistas, sino también a la propia comunidad, esto está relacionado con la preocupación por el consumo, en el consumo público el índice más alto es el textil, es aquí donde la industria textil es protagonista, porque las prendas que se producen para la venta en el mercado están hechas con químicos que son cada vez más dañinos para el medio ambiente. Por ello este proyecto empresarial tiene como finalidad producir y comercializar prendas orgánicas hechas de fibras de algodón orgánico y materiales biodegradables, ayudando a la salud de los consumidores y cuidando el medio ambiente, en el proyecto se menciona el origen del desarrollo del producto. Nuestro emprendimiento tiene como finalidad querer implementar estilo, comodidad e incentivar a la tendencia medioambiental, así como reducir la producción y venta de ropa convencional que contiene ingredientes químicos contaminantes para nuestro mercado objetivo, dañando el medio ambiente y el cuidado de la piel. Seguidamente se ejerció un análisis de mercado por medio de encuestas pudimos saber la demanda de nuevo producto, donde el negocio se orienta a los hombres y mujeres con edades entre 18 a 40 años con ingreso mínimo en toda lima, más adelante se desarrolló una investigación técnica en el que se decretó el lugar, así como el tamaño y la comercialización de la planta determinando el desarrollo de fabricación para la preparación de prendas medioambiental de material ecológico. A través de un estudio financiero se decretó que el emprendimiento es rentable el cual se determinó con los sistemas de evaluación.
Plan de negocio para la producción y comercialización de chocolates finos de acai
Authors:   , Ccoñas Escobar Mariam Yulissa , Lizarbe Reinoso Alberto , Gutierrez Lozano Joseph Martin , Asencion Apolinario Samanta Stefany
Published: February 2024

Como resultado de brindar un producto único que tenga los mejores beneficios y que el principal ingrediente es el chocolate y el Acai, se presentará un plan de negocio viendo la necesidad de los clientes al consumir un producto totalmente natural. Donde la población pueda darse ese pequeño gustito de un fruto selvático con proteínas muy buenas y junto al chocolate, brindando estos dos juntos beneficios para la salud y a la vez de un sabor único, teniendo en cuenta un proceso de investigación donde se evaluará al consumidor teniendo en este plan de negocio el nivel socio económico donde podremos visualizar quienes consumen más el chocolate y donde podremos evaluar el consumo que tiene dando un valor especial. El objetivo principal es brindar un producto muy rico y totalmente natural, no solo eso nuestro producto dentro de este plan de negocio será presentado por envases biodegradables donde contribuye con el medio ambiente a un buen precio. Siendo esta idea que fue mejorando al conocer más de este fruto y recordar que pensamos más en la salud de nuestros consumidores. Siguiendo con nuestro objetivo es meternos en la mente de nuestros consumidores detallando estrategias para que el consumidor conozca nuestro producto con publicidades, promociones, Exposiciones en ferias teniendo como finalidad que conozcan la marca y la calidad que brindaremos. Contaremos dentro de este plan con una estrategia esencial el marketing mix (Producto, Precio, Plaza y Distribución) donde nos ayudará a tener un posicionamiento ante nuestra competencia. ya que se realizaron encuestas para poder ver el punto de vista de nuestros consumidores y mejorar nuestra idea de negocio, renovando algunas decisiones que se llevaron a cabo en nuestro...
Frecuencia de dermatomicosis como causa de alopecia en cuyes de crianza intensiva de Manchay-Pachacamac, Lima-Perú
Authors:   , Medina Murga Sofia
Published: February 2024

El cuy (Cavia porcellus) es un mamífero roedor doméstico criado en el Perú para el consumo de su carne y es una fuente de ingresos económicos para las familias que viven en zonas rurales del Perú, contribuyendo a la seguridad alimentaria del país al ser un animal de tamaño pequeño, de fácil crianza y de gran valor nutritivo por ser alto en proteína y bajo en grasas. La alopecia es un signo clínico dermatológico común en cuyes de crianza intensiva, donde las consecuencias son que disminuye la calidad de las carcasas de los cuyes y empeora la conversión alimenticia, ya que hay prurito que hace que se autolesionen, disminuyendo el apetito de los animales por el estrés, generando pérdida económica a los productores. La presente investigación se enfocó en la infección por dermatofitos como causa de alopecia en cuyes y se plantearon tres métodos de diagnóstico para identificarlos, incrementando de esta manera la eficiencia diagnóstica de este tipo de cuadro infeccioso. Se ejecutó la prueba de concordancia Kappa entre el cultivo micológico y el tricograma y entre el cultivo micológico y la citología para evaluar qué tan efectivas son las pruebas tricograma y citología en comparación al cultivo micológico. Además, se determinó la asociación entre el cultivo micológico frente a variables respecto a tipo de alopecia, región corporal, categoría zootécnica y sexo, en condiciones de sistemas de crianza intensiva en Lima-Perú. La frecuencia de dermatomicosis en cuyes de crianza intensiva en Lima-Perú fue de 63.3% (53.5%-72.3%), determinado por la positividad al cultivo micológico. Las especies diagnosticadas fueron Trichophyton mentagrophytes y Trichophyton tonsurans con una frecuencia de 54.1% (44.8%-63.5%) y 4.6% (0.66%-8.52%), respectivamente. La dermatomicosis se presentó más comúnmente en la región nasal con una frecuencia de 83.3% (70.0%-96.7%)...
Impacto de la planeación estratégica y de la comercialización en la competitividad de las microempresas productoras de masa y tortilla de Chalcatongo de Hidalgo, Oaxaca
Authors: Arellano Mont Lluvia Jazmín
Published: February 2024

Existen diversos modelos para determinar la competitividad de las empresas a nivel local y nacional; los factores que se emplean en cada modelo de competitividad incluyen tanto aspectos internos como externos a las organizaciones. A través del presente estudio se pretende determinar la influencia de las variables de planeación estratégica y de comercialización en el nivel de competitividad de las microempresas productoras de masa y tortilla de Chalcatongo de Hidalgo, Oaxaca, empleando para ello el mapa de competitividad creado por el Banco Interamericano de Desarrollo para el diagnóstico organizacional de la pequeña y mediana empresa, y con esto descubrir sus fortalezas y debilidades. Es un estudio empírico, no experimental, cuantitativo, correlacional y transversal, en el que se aplicó la técnica de la encuesta a todas las empresas de la industria y al municipio indicado; los datos obtenidos fueron codificados y normalizados, para posteriormente ser tratados a través del análisis ANOVA, identificándose con ello que las citadas variables ejercen una influencia positiva alta sobre el índice, pero existe una relación positiva débil al particularizar en la combinación de sus dimensiones, haciendo ver con esto la importancia que tiene el mejorar las prácticas de empresa y documentar, difundir y actualizar los procesos empresariales, para fortalecer la profesionalización de las microempresas ubicadas en Oaxaca y en México.
Wellens Syndrome: Prevalence, Risk Factors and Coronary Angiographic Variation. A Cross-Sectional Study
Authors: Mohamed Sami , Abdelaziz Samoal
Published: February 2024

Background: Wellens syndrome complicates acute coronary syndrome and, if unmanaged, can lead to immanent myocardial infarction. This study aimed towards determining the prevalence of Wellens syndrome among acute coronary syndrome patients while focusing on both types and identifying the associated risk factors, then exploring the variation in affected coronary arteries within patients fulfilling Wellens syndrome criteria.
Methods: Implementing a descriptive cross sectional hospital based observational study design, at Ahmed Gasim Teaching Hospital for Cardiac Surgery and Renal Transplantation in Khartoum North, Sudan, the study was conducted following using a non probability convenience sampling of patients fitting the inclusion criteria. Data was collected using closed ended structured questionnaires. Ethical clearance was obtained from relevant authorities. Statistical analysis was done using descriptive and comparative data analysis with the aid of the SPSS software, and STROBE guidelines were followed.
Results: A total of 120 patients were included, 70 males and 50 females, majority in their fifth decade. 14 patients had no documented risk factors. 42.5% had STEMI, 34.2% had NSTEMI and 23.3% had unstable angina. Patients fulfilling Wellens syndrome criteria were 18 (15%), 55.6% of them were type A and 44.4% were type B. Most frequently encountered risk factor among Wellens syndrome patients was Diabetes (50%). Out of 16 Wellens syndrome patients who underwent coronary angiography, 50% had mid LAD involvement, most were type A; 25% had proximal LAD involvement and 25% had normal coronary angiography. There was some association between Wellens syndrome and NSTEMI, but no significant association with any specific risk factor.
Conclusion: Wellens syndrome is not a rare condition although uncommon, it can present even without a specific predisposing risk factor and coronary angiographic variation other than the proximal part of the LAD artery may occur, including multiple vessels involvement.
Condensed Abstract: This is a descriptive cross sectional study conducted at Ahmed Gasim Teaching Hospital in Sudan, to determine the prevalence and risk factors of Wellens syndrome. Data was collected using questionnaires and analyzed with the SPSS software. Out of 120 patients, 14 patients had no documented risk factors. 34.2% had NSTEMI and 23.3% had unstable angina. Patients fulfilling Wellens syndrome criteria were 18 (15%). The commonest risk factor among Wellens syndrome patients was Diabetes (50%). 50% of Wellens syndrome patients had mid LAD involvement. The study concluded that Wellens syndrome is not rare, it can present without specific risk factor and coronary angiographic variation other than the proximal LAD artery can occur.
Comparing the effectiveness of adulticide application interventions on mitigating local transmission of dengue virus
Authors: Kummer Allisandra G. , Wilke André B.B. , Ventura Paulo C. , Vasquez Chalmers , Medina Johana , Unlu Isik , Gonzalez Yaziri , Mhlanga Adequate , Benelli Giovanni , Ejima Keisuke , Mutebi John-Paul , Ajelli Marco
Published: February 2024

The southern US has a large presence of mosquito vector species for dengue virus (DENV) and experiences thousands of DENV importations every year, which have led to several local outbreaks. Adulticide spraying targeting active mosquitoes is one of the most common insecticide strategies used as a response to an outbreak. The aim of this study is to evaluate the effectiveness of adulticide spraying conducted at different times of the day to curb DENV transmission. Based on unique dataset dataset of Aedes aegypti diel activity patterns in Miami-Dade County, Florida, and Brownsville, Texas, we developed a mechanistic model of DENV transmission, which simulates adulticide spraying interventions. We estimated that spraying adulticide for 14 consecutive days at 7am or 8pm was highly effective in reducing DENV outbreak probability from 10% in the absence of interventions to 0.1% for Miami-Dade County, and from 7.8% to 0.1% for Brownsville. Moreover, in case of a local outbreak in Miami-Dade County, we estimated the median number of symptomatic infections after the identification of a local outbreak to be reduced from 67.0 (IQR: 25.5-103.0) in the absence of interventions to 1.0 (IQR: 0.0-2.0) when spraying adulticide for 14 consecutive days at 8pm. In Brownsville, the same intervention is estimated to lead to a decrease from 15.0 (IQR: 7.0-33.0) cases to 1.0 (IQR: 0.0-2.0). Our study highlights the importance of considering diel activity patterns of vector mosquito species in arbovirus preparedness and response planning and provide quantitative evidence to guide the decision-making of mosquito control authorities.
Snail Homing and Mating Search Algorithm: A Novel Bio-Inspired Metaheuristic Algorithm
Authors: kulkarni Anand Jayant , Kale Ishaan , Shastri Apoorva , Khandekar Aayush
Published: February 2024

In this paper, a novel Snail Homing and Mating Search (SHMS) algorithm is proposed. It is inspired from the biological behaviour of the snails. Snails continuously travels to find food and a mate, leaving behind a trail of mucus that serves as a guide for their return. Snails tend to navigate by following the available trails on the ground and responding to cues from nearby shelter homes. The proposed SHMS algorithm is investigated by solving several unimodal and multimodal functions. The solutions are validated using standard statistical tests such as two-sided and pairwise signed rank Wilcoxon test and Friedman rank test. The solution obtained from the SHMS algorithm exhibited superior robustness as well as search space exploration capabilities within the less computational cost. The real-world application of SHMS algorithm is successfully demonstrated in the engineering design domain by solving three cases of design and economic optimization shell and tube heat exchanger problem. The objective function value and other statistical results obtained using SHMS algorithm are compared with other well-known metaheuristic algorithms.
RISEinFAMILY project: a study protocol for the integration of families at Neonatal Intensive Care Units (NICUs) to empower them as primary caregivers
Authors: Alferink Milène T. , Moreno-Sanz Barbara , Cabrera-Lafuente Marta , Ergenekon Ebru , de Haan Timo R. , Kempen Anne A.M.W. van , Lakhwani Jyoti , Rabe Heike , Zaharie Gabriela C. , Pellicer A.
Published: February 2024

Background
Family Integrated Care (FICare) has demonstrated positive outcomes for sick neonates and has alleviated the psychological burden faced by families. FICare involves structured training for professionals and caregivers along with the provision of resources to offer physical and psychological support to parents. However, FICare implementation has been primarily limited to developed countries. It remains crucial to assess the scalability of this model in overcoming social-cultural barriers and conduct a cost-effectiveness analysis. The RISEinFAMILY project aims to develop an adapted FICare model that can serve as the international standard for neonatal care, accommodating various cultural, architectural, and socio-economic contexts.
Methods
RISEinFAMILY is a pluri-cultural, stepped wedge cluster controlled trial conducted in Spain, Netherlands, United Kingdom, Romania, Turkey and Zambia. Eligible participants include infant-family dyads admitted to the Neonatal Intensive Care Unit (NICU) requiring specialised neonatal care for a minimum expected duration of 7 days, provided there are no comprehension barriers. Notably, this study will incorporate a value of implementation analysis on FICare, which can inform policy decisions regarding investment in implementation activities, even in situations with diverse data.
Discussion
This study aims to evaluate the scalability and adaptation of FICare across a broader range of geographical and sociocultural contexts and address its sustainability. Furthermore, it seeks to compare the RISEinFAMILY model with standard care, examining differences in short-term newborn outcomes, family mental health, and professional satisfaction.
Trial registration
ClinicalTrials.gov, ID: NCT06087666 Registered on 17.10.2023. Protocol version: 19 December 2022; version 2.2.
The Split Friction Model - The Isotropic Origin of the Lateral Force in Curling
Authors: Ziegler Martin
Published: February 2024

The deviation of a curling stone with 1-5 rotations in a normal game can be explained with the isotropic nature of friction. Due to isotropy, the lateral force arises as a delta of asymmetric friction forces opposite to the centripetal forces. Considering lubricant accumulation, the quadratic Stribeck-curve on the advancing side is modified to show rather constant values. Below a critical velocity difference of the two sides this will result in a curl. For few rotations, an exact calculation based on experimental measurements explains the observed deviation of roundabout 1m declining with increasing rotations. The deviation above 5 rotations can be explained considering statics and additional heuristic calculations that involve Scratch Theory with respect to gyroscopic precession as well as crush probability. All this then yields a graph that also explains the observed increasing deviation up to 2m for 80 rotations.
PAC Codes: 81.40.Pq
Scientific Review of Protocols to Enhance Informativeness of Global Health Clinical Trials
Authors: Burford Belinda , Norman Thea , Dolley Shawn
Published: February 2024

Background
Trial informativeness describes the likelihood of a clinical trial to have a meaningful impact on clinical practice, research or policy decisions. A dedicated scientific review process for protocols at the post-funding stage is not common, yet is an opportunity to enhance trial informativeness. The Bill and Melinda Gates Foundation (BMGF), as one of the largest non-industry funders of clinical trials in the world, created a group called Design, Analyze, Communicate (DAC). DAC began expert scientific reviews of a sample of grantees’ trial protocols in 2019. We categorized and quantified areas of scientific review feedback provided for 52 clinical trial protocols submitted to DAC over a 3-year period. Knowledge of feedback themes offers insight into potential areas of trial design weakness, which may be helpful in considering the types of support best offered in the early stages of trial design for global health clinical trials.
Methods
We conducted a retrospective analysis of protocol review feedback provided by DAC to grantees. Protocols were submitted to BMGF between 2020–2022. A qualitative content analysis was conducted by developing a codebook of clinical trial methodology topics and subtopics, and systematically coding free-text review feedback. Manual text classification of individual feedback statements enabled quantification and frequency analysis of review feedback.
Results
A total of 1537 individual recommendations were made across all 52 protocols. The median number of recommendations per protocol was 28 (range: 13 to 52), covering a wide range of issues related to clinical trial design, implementation, analysis, and impact. Nearly half of all recommendations (47%) were characterized by the review team as high priority. The areas with the highest frequency of recommendations were Statistics and Data Analysis, Trial Procedures, and Intervention/Dose.
Conclusions
This study provides a taxonomy of scientific review feedback topic areas that can be used to categorize clinical trial design topics. The high number of recommendations per protocol review across several distinct topic areas highlights the need for a scientific review to enhance informativeness of global health clinical trials. This review must take place prior to trial initiation and review teams should include statistical and trial design expertise with additional expertise tailored to trial/intervention type and phase.