bluuebunny/crossref_metadata_2025 huggingface dataset:
THE INFLUENCE OF WORK LIFE QUALITY ON INDIVIDUAL PERFORMANCE IN E-COMMERCE IN EARLY COVID-19
Authors: Aprilia Fhany , Idulfilastri Rita Markus
Published: October 2023

Large-Scale Social Restriction (PSBB) has been in place since March 2020 in response to the COVID-19 pandemic. Of course, this has an impact on many things, one of which is the restriction of activities outside the home, especially for employees who are required to work. At this time, many companies have issued policies to continue working from home. This new habit certainly requires employees and companies to be able to provide similar facilities as in the office. In addition, employees are also required to be able to adapt and continue to complete their duties properly. The purpose of this study was to examine the effect of quality of work life on the individual performance of e-commerce employees at the beginning of the COVID-19 pandemic. To achieve this goal, the Individual Working Performance Questionnaire (IWPQ) and Quality of Work Life (QWL) were used to collect data from 122 participants. A direct structural equation model (SEM) is used to analyze the data using Lisrel 8.80 program. This is done to investigate the effect of quality of work life on individual work performance. Our findings show that there is a strong correlation between QWL and IWP in e-commerce employees at the beginning of the COVID-19 pandemic with a gamma coefficient of 0.73 and an R2 value of 54%. Future research is expected to be carried out longitudinally by adding personality variables.
LOGO DESIGN FOR “INFINIKLIN” A CLEANING PRODUCTS AND SERVICES COMPANY
Authors: Angela Sheren Juan , Darmo Budi
Published: October 2023

Logo is an image sign that describes an identity and as a representation for a company. The company's character is communicated with elements of images, shapes, colors, and typography that are composed in an integrated manner. The logo-forming element is a sign system that aims to communicate the message of the type of business being undertaken, image, and character traits. The signs used in making the logo are signs that are easy to understand and identify a company so that it is easily accessible to the public. This logo design aims to produce a brand logo that has the characteristics of the company. Design Method Using 5 Steps of Design from Robin Landa. The result of this design is the Infiniklin logo which is made using vector, in the form of two water drops, blue in color according to the company's identity, and using simple and modern typography. The visual identity of the Infiniklin logo is a solution to support each branch company of Infiniklin having their own and uniform logo. The logo design was made without forgetting the characteristics of Infiniklin itself thus reflecting the image built by the company.
REDESIGN LOGO OF INTERIOR DESIGN COMPANY AS AN EFFORT TO IMPROVE COMPANY’S IMAGE
Authors: Alim Bulan , Darmo Budi
Published: October 2023

Levendig is a company engaged in Interior Design, Architectural Design, and Contracting. The lack of a strong visual identity makes Levendig less prominent in the eyes of the public. The existing visual identity is not able to represent Levendig's image as a company engaged in interior design. Therefore, the purpose of this logo redesign is to enhance the image that Levendig wants to highlight, namely as a professional, modern, and flexible interior design service that can reach all ages. This design uses the robin landa method, which consists of 5 stages of design to ensure orientation, analysis, concept, design, and implementation. The result of the design is a logo with a basic geometric shape approach that uses a connected line to show that Levendig produces a house design that is durable (beyond time and generation). Every corner is rounded to give the impression of humanity. The typography used is in the form of hand writing to represent such a long life, meaning that Levendig is always there and can be in various styles. So that with the presence of a new visual identity, Levendig's brand image can stick and stand out in the eyes of the public. In the process of redesigning the logo, it is necessary to pay attention to several things, such as colors and visuals that need to be adjusted to the company's vision and mission, typography that can reflect a company but must also pay attention to the level of legibility, and finally the shape. The logo is simple and unique to make it easy to remember, easy to apply to various media, easy to associate, but not too abstract and can tell the story of a brand.
THE EFFECT OF CELEBRITY WORSHIP ON THE NEWS DIFFUSION OF BTS MEAL
Authors: Christine Monica , Aulia Sisca
Published: October 2023

Technology is increasingly sophisticated, making many people use social media to promote their products, one of which is McDonald's, which collaborates with BTS for the BTS Meal product, which is the number three trending topic in the world. This research was carried out with the aim of testing whether a person's level of liking for idol (celebrity worship) affects the level of news spread about BTS Meal. The theory used in this research is two step flow, news diffusion, celebrity worship, and social media. The researcher used a quantitative approach with a simple linear regression test to examine this. Respondents in this study were 104 by purposive sampling. The sample in this study were Tarumanagara University students who are BTS fans. The study's results using a simple linear regression test showed an influence of celebrity worship levels on the diffusion of BTS Meal news by 56.2% with a significant ANOVA value of 0.000. If the ANOVA value < 0.05, it can be concluded that there is a significant difference in the influence between celebrity worship and the diffusion of BTS Meal news.
RELIGIOUS ORGANIZATION’S ONLINE COMMUNICATION DURING PANDEMIC (A CASE STUDY ON KRAMAT PULO SEVENTH-DAY ADVENTIST CHURCH IN THE TIME OF COVID-19 OUTBREAK)
Authors: Priscilla Yokhebed , Loisa Riris
Published: October 2023

Religious organizations are now forced to change their form of communication into online communication because of government policies that urge religious organizations to postpone carrying out religious activities in places of worship in order to reduce the level of transmission of the Covid-19 outbreak. Organizational communication is the process of delivering information and building understanding from individual to individual, or individual to group within an organization. This study raises the issue of online communication as a new form of communication in religious organizations with a focus on knowing the type of online communication used, the flow of online communication of religious organizations, and barriers in online communication. With a qualitative approach used on this research, researchers also used a case study method. Collecting data using in-depth interview and observation techniques. The subject of this research is the administrator of the Kramat Pulo GMAHK organization. The results of the study show that online communication of religious organizations uses asynchronous communication social media such as Facebook, Youtube, and Whatsapp Group as a means of disseminating information, coordinating, and alternative means of religious deepening activities. Meanwhile, synchronous communication media such as Zoom is intended as a substitute for religious activities or worship services, and organizational meetings. The flow of organizational communication online in the process of disseminating information is vertical linear from the leader of the organization to the bottom. Technical barriers, such as internet network problems, are a major problem in online communication of religious organizations.
THE MEANING OF HAPPINESS FOR PEOPLE WITH PHYSICAL DISABILITY IN EARLY ADULTHOOD
Authors: Iwank Keyla Putrika , Tumanggor Raja Oloan , Tasdin Willy
Published: October 2023

Physically disabled is a term used for individuals who have physical disabilities. Physical disabilities can be caused by life events or have been present since birth. People with disabilities are often considered to have a miserable life, but they can also feel happiness. Happiness can be seen through 5 indicators, including: (1) positive emotion; (2) engagement; (3) relationships; (4) meaning; (5) advancements. This study aims to obtain an overview of the happiness of early adulthood as a physically disabled person. There are 4 research subjects in their early adulthood, with characteristics aged 20-40 years in which 2 have a disability from birth and 2 others acquire physical disabilities through life events. This qualitative research uses in-depth interviews and interpretive phenomenological analysis. The research findings show that the four subjects have happiness, both which is a pleasant experience (hedonic) and that is achieved through meaning and purpose (eudaimonic). It was found that there was a relationship between the indicators that appeared in the four subjects, where all indicators led the subjects to feel happiness.
PERSUASIVE MESSAGES IN NEW MEDIA CONTENT STRATEGIES IN ADVISING INDONESIAN COMMUNITIES TO DO COVID-19 VACCINATIONS
Authors: Obaja Denzel , Loisa Riris
Published: October 2023

Overcoming the Covid-19 pandemic is one solution to suppress the Covid-19 virus from spreading, one of them is through vaccination. To persuade Indonesian citizens to get their Covid-19 vaccination, the role of mass media, such as Folkative, is crucial and very much needed, especially through communication on Instagram. Hoaxes revolving Covid-19 vaccines and lack of awareness about this issue have become a challenge for media like Folkative to deliver persuasive messages surrounding Covid-19 vaccines. Therefore, this study aims to know how Folkative communicates a persuasive message to urge Indonesian citizens to get Covid-19 vaccine shots a. Later, the findings of this research were analyzed using the concepts or theories such as New Media, Public Relations, also strategy, and technique of persuasive communication, where the primary data was obtained through interviews with a qualitative approach. After analyzing the findings, the data showed that Folkative utilizes Instagram as the main medium in delivering the persuasive message which was created through four Public Relations strategies such as publications, events, messages or news, and Corporate Social Responsibility. Folkative also applied two persuasive communication strategies, psychodynamic strategy, and the meaning of construction strategy. These strategies were also supported by The Yes-Responds Technique, Putting It Up to You Technique, Say It with Flower Technique, Don't Ask If, Ask Which Technique, The Swap Technique, also Reassurance Technique. Through a series of persuasive communication strategies and techniques implemented by Folkative, the results or responses from Folkative’s external public are following the expected outcome that Folkative is hoping for, which is a change of behavior like participating in the Covid-19 vaccination program from the government. Folkative’s persuasive contents itself receive positive responses, such as giving encouragement and assurance for the public to be vaccinated.
APPLICATION OF TIMELESS DESIGN IN APARTMENTS
Authors: Juergen Gottfried , Laswandi Hartini
Published: October 2023

The use of timeless as a topic has never been done in interior design or study for private residences, which is why this research was done. This study employs a quantitative approach with two stages and eight analyses that is based on Rosemary Kilmer's theory. The fast-paced changes and advances in the realm of interior design will undoubtedly have an impact on the current design. As more and more design upgrades appear, user ennui will rise. As a result, he developed a timeless interior design concept that can be used in a private residence and endure throughout the ongoing growth of interior design. This study demonstrates that maximizing interior The topic will be carried out to its fullest potential by using design elements including materials, colors, shapes, patterns, and lighting. This study is helpful for students working on practical projects, designers looking at how timeless design can be applied to interiors, and designers creating works with timeless design as a guiding principle.
BODY IMAGE OF INSTAGRAM USERS IN EARLY ADULTS THAT USING EDITING APPLICATION
Authors: Pasande Victoria Elfanda , Idulfilastri Rita Markus , Wati Linda
Published: October 2023

Social media Instagram is currently one of the most widely used media by early adulthood. Instagram provides a service to share content in the form of photos and videos. There are peoples who do editing before uploading their photos or videos to Instagram. This turns out to be related to body image or someone's body image. Body Image is the way individuals assess their body image physically. This assessment is based on personal perceptions, input from the environment, and comparisons with others. This research was conducted using qualitative methods. Data were collected by in-depth interviews with five participants. The characteristics of the participants are; 18-24 years old, being an Instagram user for at least 3 years, using Instagram at least 2 hours per day, and doing editing before uploading on Instagram. The results showed that the five participants were less satisfied with their body image. One of the causes of dissatisfied participants is the type of ideal body shape. As a result, participants make various efforts such as diet, exercise, and treatment. Assessment of the environment such as family and friends as well as comparisons with others are also aspects that form the body image of participants. In addition, to achieve the ideal appearance, participants also edited the photos they uploaded to Instagram such as shrinking their arms, removing acne scars, and making themselves look taller.
ANALYSIS ON THE EFFECT OF COLOR ON PATIENT IN HOSPITAL ROOM (A CASE STUDY AT KALIDERES GENERAL HOSPITAL)
Authors: Desty Friscily , Purnama Ika Yuni , Andraini Nikki Indah
Published: October 2023

The main factor for recovery process of patients who stay in the patient room not only requires medical assistance but also psychological [1]. The important things that affect patient comfort is psychological color in the patient room. The appropriate color is expected to reduce the patients’ stressed. The right color is also expected to reduce the anxiety of patients who are undergoing the healing process, so that healing can be faster and optimal. According to Sadjiman Ebdi Sayoto, color is the nature of light that is emitted or as part of the experience of the sense of sight [2]. The purpose of the design is to speed up the patient's healing and reduce anxiety. This design uses the Rosemary Kilmer design method. The method is carried out by analyzing patient needs and synthesizing the results of solving patient problems [3].
La mutación T878A del receptor de andrógenos podría ser activada por esteroides endógenos debido a pérdida de selectividad
Authors: De la Mora González David , Rojas Durán Fausto , Aranda Abreu Gonzalo Emiliano , Ramos-Morales Fernando Rafael , Vidal-Limón Abraham , Suárez-Medellín Jorge
Published: October 2023

Los andrógenos son hormonas esteroideas involucradas en el crecimiento y desarrollo de la próstata actuando a través del receptor de andrógenos, un receptor nuclear que funciona como factor de transcripción dependiente de ligando del cual se conoce la estructura cristalográfica del dominio de unión a ligando. En etapas avanzadas del cáncer de próstata existen mutaciones que pueden contribuir al surgimiento de la etapa resistente a la castración, como la mutante T878A; además, hay evidencia de que a pesar del bloqueo androgénico existe activación del receptor que puede estar mediada por esteroidogénesis intratumoral y que las mutaciones en el receptor pueden hacer que se active por otros andrógenos debido a pérdida de la selectividad que conlleva a una promiscuidad de ligandos. Por lo tanto, el objetivo de este trabajo fue recopilar las estructuras químicas de andrógenos u otras hormonas esteroideas presentes en el microambiente tumoral y evaluar si la presencia de la mutante T878A afecta su afinidad por el receptor, lo cual se llevó a cabo mediante un análisis in silico de acoplamiento molecular por conglomerado para calcular cambios en la energía libre de acoplamiento de la formación del complejo ligando-receptor. Se encontró que la presencia de la mutación aumenta de manera significativa la afinidad de los ligandos dehidroepiandrosterona, androsterona, progesterona, cortisol y 17-hidroxipregnenolona, por lo que es posible que debido a la mutación el receptor esté siendo activado por esteroides endógenos, lo que no ocurría en condiciones fisiológicas.
Gambaran Kepadatan Tungau Debu Rumah Spesies Dermatophagoides pteronyssinus dan Dermatophagoides farinae di Kelurahan Jati Kecamatan Padang Timur Kota Padang
Authors: Arrahmi Febby , Irawati Nuzulia , Rita Rauza Sukma
Published: October 2023

House dust mite is closely associated with the incidence of allergies such as asthma, atopic dermatitis and allergic rhinitis. Spesies of house dust mite which has been proven to be related with the incidence of allergies are Dermatophagoides pteronyssinus and Dermatophagoides farinae. The purpose of this study is to describe the density of house dust mites speciesÂ  in residence houses in Kelurahan Jati. The study was a descriptive study with 96 samples taken fromÂ  two habitats, namely beds and carpets in 48 homes that have been selected randomly. House dust mites were identified using a light microscope with magnification of 40 times. The results showed that 56 of 96 samples were positive of house dust mites. This study showed that Dermatophagoides pteronyssinus was the most commonly found spesies of house dust mite (71 mites) with the highest density in the bed (6.88 mites/ gram of dust). Species Dermatophagoides farinae only found as many as 5 mites with the highest density in the carpet (0.46 mites/ gram of dust). The conclusion of this research is the density of house dust mites in Kelurahan Jati are quite low so that the possibility to cause allergic diseases is very small.
Kajian Pengelolaan Instalasi Pengolahan Air Limbah di Rumah Sakit
Authors: Meilani Difana , Hanif Mohammad
Published: October 2023

Risk management is a process of knowing, analyzing, and controlling risks of every activity in product and, service sectors. The aims are the process runs effectively and efficiently. One of the ISO studies on risk management has been guided in ISO 31000. This ISO provides a standard framework with the title "Risk Management-Principles and Guidelines on Implementation". Based on the sources in the Ministry of Health in 2016, there are 2,488 hospitals spread throughout Indonesia. However, only 10.29% of hospitals have ability to control the Wastewater Treatment Plant (WWTP) properly. The purposes of this research are determining risk priority of Wastewater Treatment Installation and prioritizing risk evaluation of WWTP at Ibnu Sina hospital, Padang. In this research, fuzzy AHP method was used. The questionnaire was validated by environmental department which monitors hospitalsâ€™ waste. After ranking the priority risk, Risk Breakdown Structure method was then being used to evaluate the risk that has potentiallty in waste water processing.The result from the fuzzy AHP are five risks, the main priority risk is the pipe with sub risk of liquid waste stuck with value of 0,0779.Â  The second risk is septictank with excess nitrification sub risk with value of 0,0713. The third risk is the sampit with subcritical liquid waste spilled with value of 0,0642. The fourth risk is the lack quality of human resourcesÂ with the weight value of 0,0590 and the fifth risk is the blower with the condition is not feasible to use with the weight value of 0,0548.
SEBARAN KEBISINGAN BANDAR UDARA ADI SUMARNO MENGGUNAKAN SOFTWARE MATLAB
Authors: Purnama Lea , Nilawati Rd. Indah Nirtha , Annisa Nova
Published: October 2023

Noise is an unwanted sound that comes from a business or an activity in a certain time level that can cause health problems and comfort. The level of aircraft noise exposure around Adi Sumarmo International Airport can cause disruption to residents living in close proximity to the airport. The creation of airport noise maps is urgently required to identify residential areas that are affected in certain areas. The aircraft noise contour is created by the model using Matlab Software. This study use LWECPN as the evaluation indicator for aircraft noise according to Government Regulation No.40 of 2012. It is recommended that the noise level in cultural and educational areas should be less than 70 dB, whereas the level at other living areas should be no more than 75 dB. The method used in this study consisted of several processes: modeling steps, programming steps, and modeling validation. Based on the aircraft noise simulation of Adi Sumarmo Airport it was found that the regional coverage of area with LWECPN > 80 dB was 4,13 km2, including 1,16 km2 residents living and 5 educational buildings, LWECPN 75-80 dB was 2,27 km2 including 1,912 km2 residents living and 5 educational buildings, and LWECPN 70-75 dB was 6,4 km2 including 8 educational buildings.Â Keywords: Noise, Modelling, ValidationÂ ABSTRAKÂ Kebisingan merupakan suara yang tidak dikehendaki yang berasal dari dari usaha atau suatu kegiatan dalam tingkat waktu tertentu yang dapat menimbulkan gangguan kesehatan dan kenyamanan. Tingkat kebisingan yang dihasilkan pesawat dari Bandar Udara Internasional Adi Sumarmo dapat menyebabkan gangguan terhadap permukiman penduduk yang berada di sekitarnya. Pembuatan peta sebaran kebisingan penting dilakukan untuk mengidentifikasi permukiman yang terkena dampak kebisingan tersebut. Peta kontur kebisingan dihasilkan dari model yang dibuat dengan menggunakan software Matlab. Pada penelitian ini indeks kebisingan yang digunakan yaitu WECPNL yang sesuai dengan PP No. 40 Tahun 2012. Dalam indeks kebisingan WECPNL, tingkat kebisingan diharuskan kurang dari 70 dB untuk kawasan sekolah, dan tidak lebih dari 75 dB untuk kawasan permukiman penduduk. Metode yang dipakai dalam penelitian ini terdiri dari beberapa tahapan, yaitu tahap permodelan, tahap pemrograman, dan validasi model. Berdasarkan hasil simulasi kebisingan pesawat di Bandar Udara Adi Sumarmo, terdapat kawasan tingkat kebisingan dengan WECPNL > 80 dB seluas 4,13 km2 yang terdiri dari 1,16 km2 untuk kawasan permukiman dan terdapat 5 bangunan sekolah yang berada pada kawasan tersebut. Selain itu luas total kawasan tingkat kebisingan dengan WECPNL 75-80 dB sebesar 2,27 km2 yang terdiri dari kawasan permukiman seluas 1,912 km2 dan terdapat 5 bangunan sekolah. Pada kawasan tingkat kebisingan WECPNL 70-75 dB mencakup luas wilayah sebesar 6,4 km2 dimana pada kawasan tersebut terdapat 8 bangunan sekolah.Â Kata Kunci: Kebisingan, Permodelan, Validasi.
Analysis The Effect of Solar Radiation on The Efficiency of PV Plant 50 kWp Rooftop UNPAM Viktor
Authors: Abdul Rozak Ojak , Tri Mulyadi Rohmat , Nurfadilah Hafidz
Published: October 2023

The potential for solar energy in indonesia which is a tropical country is very large with an insolation of around 4.5 Kwh/m2/day. Solar energy in the form of radiation waves will affect the power generated by solar panels and the efficiency of solar panels in generating power. This study was conducted at PV plant pamulang university which has a total of 108 panels with 6 strings and 18 panels in each string. The data in this study were taken per string to see the difference of efficiency in each string. The main problem of this study is to find out how much power and efficiency generated by PV plant against solar radiation. The purpose of this study is to understand and analyze the effect of solar radiation on power and efficiency. The method used is a quantitative descriptive method using a seaward irradiance meter to measure the average daily radiation per string and isolarcloud software to retrieve data from the voltage and current per string. The data taken is then calculated using a formula and then described using tables. Study shows that heat from the weather will result in decreased efficiency and the results of the analysis for a day the average value of radiation is 544.19 w/m2, the average power is 4227.79 watt and the resulting average efficiency is 18.57%.
Novel multi-epitope vaccine design against Mycobacterium tuberculosis: An Immunoinformatics strategy
Authors: Dhakshinamoorthy Dhayanitha Ranganathan , Karuppasamy Ramanathan
Published: October 2023

Vaccination has proven to be an effective strategy for the prevention of tuberculosis (TB). Interestingly, peptide-based vaccines that elicit a specific immunological response are currently being explored as alternatives to the BCG vaccine. Thus, the present study aimed to design a novel, efficacious peptide-based vaccine against tuberculosis targeting Rv1115, a membrane protein and a potent stimulator of INF-γ. Initially, the immunodominant CD4+, CD8+ and B cell epitopes of Rv1115 were identified and scrutinized based on their propensity to evoke immunological responses. The propitious epitopes were then combined using the appropriate linkers (EAAAK, AAY, KK and GPGPG) and adjuvant (CobT) for the chimeric vaccine design. Further, the designed chimeric vaccine was subjected to 3D structure modelling, refinement and validation. Finally, the modelled vaccine construct was used for protein–protein docking studies with toll-like receptors 3 and 4 (TLR-3 and TLR-4) followed by immune simulation analysis and in silico cloning. Overall, the immunoinformatic results suggest that the developed chimeric vaccine could elicit robust immune responses and can be employed as an efficient preventative therapy for tuberculosis.
Rediscovering the particle in a box: Machine learning regression analysis for hypothesis generation in physical chemistry lab
Authors: Thrall Elizabeth , Martinez Lopez Fernando , Egg Thomas , Lee Seung Eun , Schrier Joshua , Zhao Yijun
Published: October 2023

Given the growing prevalence of computational methods in chemistry, it is essential that undergraduate curricula introduce students to these approaches. One such area is the application of machine learning (ML) techniques to chemistry. Here we describe a new activity that applies ML regression analysis to the common physical chemistry laboratory experiment on the electronic absorption spectra of cyanine dyes. In the classic version of this experiment, students collect experimental spectra and interpret them using the Kuhn free electron model, based on the quantum mechanical particle-in-a-box (PIB). Our new computational activity has students train regression models of increasing complexity to predict the wavelength of maximum absorption for different cyanine dyes using a set of 13 molecular features. In addition, the activity introduces methods for evaluating and interpreting regression models. Ultimately, students are prompted to use their regression analysis results to generate hypotheses for what molecular properties underlie cyanine dye absorption, leading them naturally to the PIB model. In this report, we provide a dataset, reference code implementations in Mathematica and Python notebooks, and an example lab protocol with an introduction to cyanine dyes and the ML techniques. This activity can be completed in a single 3-hour lab period by upper-level undergraduate students with relatively little prior programming experience. Although intended to complement the experimental measurement of cyanine dye spectra, this activity can also be performed on its own; alternatively, it can form the basis of more involved projects in a computational chemistry or machine learning course.
Exploration of Biochemical Reactivity with a QM/MM Growing String Method
Authors: McFarlane Neil , Harvey Jeremy
Published: October 2023

In this work, we have implemented the single-ended growing string method within our in-house QM/MM package, QoMMMa. The goal of the implementation was to facilitate generation of QM/MM reaction pathways with minimal user input, and also to improve the quality of the pathways generated as compared to the widely used adiabatic mapping approach. We have validated the algorithm against a reaction which has been studied extensively in previous computational investigations – the Claisen rearrangement catalysed by chorismate mutase. The nature of the transition state and the height of the barrier was predicted well using our algorithm, and more than 88% of the pathways generated were deemed to be of production quality. Compared to using adiabatic mapping for similar problems, we found that our technique is slightly less efficient, but readily produces better pathways and requires less user intervention. Given that we generated a relatively large number of pathways to fully validate our technique, we have also investigated the underlying distribution of QM/MM barrier heights. We show that this distribution is not strictly Gaussian and discuss the implications for studying reactivity with static QM/MM approaches.
Enantioselective photocatalytic synthesis of bicyclo[2.1.1]hexanes as orthodisubstituted benzene bioisosteres with improved biological activity
Authors: Garrido-Garcia Pablo , Quiros Irene , Milan-Rois Paula , Somoza Alvaro , Fernandez Israel , Rigotti Thomas , Tortosa Mariola
Published: October 2023

1,5-Disubstituted bicyclo[2.1.1]hexanes are bridged scaffolds with well-defined exit vectors that are becoming increasingly popular building blocks in medicinal chemistry since they are saturated bioisosteres of orthosubstituted phenyl rings. Here we have developed the first enantioselective catalytic strategy based on a Lewis acid-catalyzed [2+2] photocycloaddition to obtain these motifs as enantioenriched scaffolds, providing an efficient approach for their incorporation in a variety of drug analogues. The bioisostere-containing drugs have been evaluated in cancer cell viability studies, observing that in some cases the biological activity of the two enantiomers is highly different. This showcases that the control of the absolute configuration and tridimensionality of the drug analogue has a large impact on its bioactivity, highlighting the need for stereoselective methods towards the construction of the bicyclo[2.1.1]hexane core.
Methods for spatial extrapolation of methane measurements in constructing regional estimates from sample populations
Authors: Schissel Colette , Allen David , Dieter Howard
Published: October 2023

Reporting initiatives for methane emissions from oil and gas operations are broadly shifting towards measurement-informed inventories. Measurement campaigns typically measure a subpopulation of facilities, and these measurements are extrapolated to a larger region or basin. Methane emissions from oil and gas systems are inherently variable and intermittent, which makes it difficult to determine whether a sample population is sufficiently large to be representative of a larger region. This work proposes a framework using a case study of an operator in the Green River Basin that assesses selection of sample populations, extrapolation of measurements to a larger region, and methods for estimating the error associated with extrapolation. This work also identifies a new metric, the capture ratio, which has a strong correlation with extrapolation error (Spearman’s correlation coefficient = -0.75). The strength of this correlation between the capture ratio, which takes into account the skewness of source-level emissions, and extrapolation error suggests that understanding the distributions of source-level emissions distributions is necessary when identifying sample populations and extrapolating measurements. The results from this work can be broadly applied to inform the selection and extrapolation of site measurements when developing methane emission inventories.
Lecciones aprendidas en el proceso de formulación de los resultados de aprendizaje de un programa de Maestría en Gerencia de Proyectos en una Facultad de Ingenierías, Diseño e Innovación
Authors: Cadenas Anaya Carmelina
Published: October 2023

El decreto 1330 emitido por el Ministerio de Educación Nacional en julio del 2019 indica que los resultados de aprendizaje son los "concebidos como las declaraciones expresas de lo que se esperaba que un estudiante conozca y demuestre en el momento de completar su programa académico" (Ministerio de Educación Nacional, 2019) y por lo tanto estos resultados de aprendizaje deben estar alineados con el perfil de egreso de acuerdo con el PEI de la IES y del Programa. Este decreto, ha tenido muchas interpretaciones para las diferentes Instituciones de Educación Superior para la formulación de los resultados de aprendizaje de sus programas antiguos, y para los nuevos programas que deben incluir esta propuesta en sus documentos maestros. Es aquí, donde las lecciones aprendidas constituyen un cuerpo de conocimiento que permite que otros formuladores de nuevos programas no cometan los mismos errores que se tuvieron en casos de fracaso y que, por otro lado, los casos de éxito sean capitalizadas como mejores prácticas en las IES. A partir de lo anterior, este artículo tiene como propósito presentar las lecciones aprendidas en el proceso de formulación de los resultados de aprendizaje de un nuevo programa de maestría en gerencia de proyectos, que obtuvo registro calificado en junio del 2022 dentro de la Facultad de Ingeniería, Diseño e Innovación, con la finalidad de transformar el conocimiento tácito que se tiene de este proceso, a un conocimiento explicito que redunde en el mejoramiento continuo de los procesos de acreditación de calidad de los programas y de obtención de registros calificados. Esta investigación tuvo un enfoque cualitativo descriptivo, con la finalidad de describir el caso de estudio y explorar las lecciones aprendidas en una secuencia lineal y partiendo de la riqueza interpretativa y contextualizada de los fenómenos (Hernández, Fernández, & Baptista, 2014). Las lecciones aprendidas a partir de la aplicación de un instrumento CI-FT-01 del Ministerio de Educación Nacional y con los datos recopilados se realizó un tratamiento y resumen de estos, para encontrar factores negativos y positivos que surgieron en el proceso y los riesgos que se materializaron. De esta manera, se pudieran identificar lecciones aprendidas y mejores prácticas con la finalidad de documentarlas. Como conclusión se puede decir que siguiendo una metodología de lecciones aprendidas se puede transformar el conocimiento tácito que está en su talento humano: docentes, colaboradores, personal administrativo y directivo, para producir un conocimiento explicito y contribuir a un modelo de gestión del conocimiento de la IES más robusto.
Desarrollo de un anemómetro
Authors: Bolívar Díaz William Daniel , Fernández Peña Diego Andrés , Piñeros Herrera Holman Yesid
Published: October 2023

El Semillero de Materia y Energía de la ETITC plantea el desafío de diseñar un mini aerogenerador a pequeña escala que entregue una potencia de 1 kW y esté operativo en el año 2023. Una variable indispensable es la velocidad del viento y el potencial eólico de la locación, ya que estos son factores cruciales en el diseño y construcción de un mini aerogenerador, para garantizar mediciones precisas de la potencia generada por el mini aerogenerador, es fundamental tener en cuenta estas variables, así como otros factores externos que dependen de la ubicación específica. El desarrollo de energías renovables en Colombia es una gran oportunidad para mitigar los efectos del cambio climático, mejorar la calidad del servicio energético y promover la generación distribuida. El cambio climático es de gran relevancia para el gobierno colombiano fomentar el uso de fuentes de energía renovables se presenta como una medida fundamental para mitigar sus efectos. En este contexto, el equipo de investigación del Semillero de Materia y Energía de la ETITC se encuentra trabajando en el desarrollo de un pequeño aerogenerador de baja potencia que utiliza un alternador de segunda mano. El objetivo principal de este proyecto es ofrecer una solución a la problemática del cambio climático y a los altos costos de energía en Colombia, al mismo tiempo que se busca garantizar su accesibilidad para los ciudadanos interesados en implementar tecnologías de energía verde. Como fundamento tenemos que el anemómetro es utilizado como una herramienta de medición de velocidad y dirección del viento, la cual es crucial para determinar la viabilidad de un sitio para la instalación de un mini aerogenerador, esto anterior con el fin de generar energía eólica, eficiente y confiable. Este tipo de dispositivos garantizan de manera óptima el aprovechamiento de energía eólica disponible y permiten recopilar de manera acertada datos que son esenciales para el diseño, construcción y operación del mini aerogenerador dentro del contexto del cambio de modelo energético en Colombia, el cual trata de hacer más énfasis en fuentes alternativas, más limpias y sostenibles.
Enseñanza de la termodinámica en los programas de pregrado de ingeniería mecatrónica e ingeniería de procesos industriales de la Escuela Tecnológica Instituto Técnico Central - ETITC
Authors: Beltrán Osuna Ángela Aurora
Published: October 2023

La termodinámica es la ciencia que describe a nivel macroscópico las transformaciones de la energía, y las relaciones entre el trabajo y el calor. Por ende, esta rama de la física es de gran utilidad para cualquier tipo de ingeniería, que esté relacionada con máquinas térmicas o procesos fisicoquímicos, ya que permite evaluar diferentes procesos donde ocurre el intercambio de calor y/o trabajo. Así, esta es una asignatura que convencionalmente requiere una gran carga conceptual y capacidad de abstracción. En la Escuela Tecnológica Instituto Técnico Central (ETITC) se trabaja bajo la consigna de “aprender haciendo por parte del estudiante y enseñar demostrando por parte del docente”, buscando que los estudiantes logren integrar rápidamente los conocimientos teóricos con la aplicación práctica, para capacitarlos en el contexto actual laboral colombiano. Este trabajo expone el trabajo realizado durante la asignatura de Termodinámica, de los programas de Ingeniería de Procesos Industriales e Ingeniería Mecatrónica de la ETITC. La enseñanza de conceptos de termodinámica tales como gas ideal, presión de vapor o refrigeración se desarrollan a través de los diferentes módulos didácticos del Laboratorio de Ciencias Fluidotérmicas, que le brindan al estudiante una interacción y aplicación directa de las nociones aprendidas en la teoría. Se exponen además otras estrategias pedagógicas y didácticas como gamificación y aula invertida, que son utilizadas por la docente bajo la bandera del aprendizaje significativo, que le permiten al estudiante aplicar los conceptos termodinámicos en su realidad cotidiana, para que logren trascender en entornos laborales más complejos y competitivos.
Estrategia didáctica para el aprendizaje de las áreas de la ingeniería mecánica y su relación con el ejercicio de la profesión
Authors: Gómez Gómez Adriana
Published: October 2023

Las estrategias didácticas son aquellas actividades programadas por los docentes con el fin de promover el logro de los aprendizajes en los estudiantes. Uno de los grandes retos al que nos enfrentamos diariamente los profesores universitarios, es la creación de estrategias didácticas que incentiven el interés de los estudiantes y que a su vez logren un aprendizaje efectivo. En este trabajo se presenta el diseño e implementación de una estrategia didáctica para la asignatura Introducción a la Ingeniería Mecánica que buscó, además de incentivar el aprendizaje de los estudiantes mediante una actividad innovadora, ponerlos en el papel de analizar y desarrollar preguntas sobre un tema específico. El objetivo principal de la actividad fue que los estudiantes pudieran poner en práctica los conocimientos adquiridos durante la clase sobre las áreas de la Ingeniería Mecánica y su relación con el ejercicio de la profesión. Particularmente este objetivo se conecta con los siguientes objetivos de aprendizaje de la asignatura: i) Describir las diferentes áreas de la Ingeniería Mecánica con los respectivos principios del conocimiento relacionados, e ii) identificar las funciones del Ingeniero Mecánico y su relación con cada una de las áreas de la Ingeniería Mecánica. Para esto, se les planteó a los estudiantes diseñar en equipos un juego de mesa que permita, a quien lo juegue, autoevaluar los objetivos de aprendizaje descritos anteriormente. El diseño del tipo de actividad se ideó teniendo en cuento los estilos de aprendizaje preponderantes de los estudiantes de la asignatura. El juego fue evaluado mediante una rúbrica según los siguientes criterios: i) diseño del tablero, ii) calidad de las preguntas elaboradas, y iii) diseño del juego: claridad en las instrucciones y reglas, recursos utilizados, nombre. El aprendizaje del tema se evaluó en un examen parcial cuyos resultados también se presentan en este trabajo. Los resultados mostraron que los estudiantes que elaboraron juegos más creativos y mejores preguntas, es decir, preguntas más complejas y que permiten establecer la relación entre las áreas y las funciones del Ingeniero Mecánico, fueron aquellos que obtuvieron mejores notas en el examen parcial.
Estimación conjunta de estados y parámetros de redes de distribución mediante un algoritmo iterativo basado en diferentes técnicas de optimización
Authors: Castro Burgos Germán Eduardo , Pantoja Bucheli Andrés Darío , Viteri Mera Carlos Andrés
Published: October 2023

La creciente integración de generadores distribuidos a partir de fuentes de energías alternativas ha impulsado el desarrollo de nuevas técnicas de control y despacho que buscan optimizar los recursos energéticos e incrementar la calidad de la energía suministrada a los usuarios finales. Para la implementación de estas técnicas es fundamental el conocimiento de los parámetros de operación de la red de distribución de cada sistema y la información sobre su funcionamiento. Los estimadores de estados constituyen una de las herramientas de mayor uso para la generación de panoramas operativos globales que garantizan la correcta aplicación de medidas de control y respuesta frente a cambios en el comportamiento de la red. No obstante, el desempeño de las metodologías tradicionales para estimación de estados está ligado al conocimiento previo de la topología empleada para la distribución y de la información disponible acerca de los parámetros correspondientes a cada uno de sus componentes, impactando de forma negativa el nivel de precisión deseado en sistemas que cuentan con un número limitado de mediciones disponibles. Este trabajo presenta el diseño de un estimador conjunto de parámetros y estados para una red de distribución tipo microrred empleando mediciones dispersas a lo largo del espacio de trabajo. La metodología propuesta se potencia ante la existencia de redes de medición inteligente en continua expansión, capaces de suministrar información valiosa acerca del comportamiento de la demanda, pero que sigue siendo limitada. Para analizar la aplicación, el estimador es aplicado a varios escenarios de prueba de diferentes extensiones alcanzando altos niveles de precisión cuándo se suministra una cantidad requerida de información.
El empleo de herramientas cartográficas de uso libre como soporte a la transformación del territorio
Authors: Jiménez Cleves Gonzalo , Garzón Barrero Julián , Hurtado Bedoya Carlos Alberto
Published: October 2023

Los mapas tradicionales proporcionan material para investigar variables relacionadas con el espacio geográfico, el cual se encuentra en constante cambio. Sin embargo, representar esta información y compilarla en una realidad tecnológicamente avanzada resulta complicado. En la investigación de diferentes estados de la información territorial, el uso de métodos cartográficos es esencial, pero es necesario seleccionar fuentes adecuadas y procesarlas de manera que la información pueda presentarse de forma interactiva mediante tecnologías web modernas. El objetivo principal de este trabajo es presentar un modelo metodológico que permita transformar antiguos mapas topográficos de diversos formatos en mapas digitales, y exponer su versión más actualizada a través de un mapa web interactivo. Se empleará la librería Leaflet como entorno de trabajo para la programación, y se buscará crear un modelo operativo que permita transformar mapas topográficos antiguos en mapas web interactivos basados en el uso de archivos Leaflet y GeoJSON
Lecciones aprendidas en la gestión de residuos sólidos urbanos Vertedero “Las Mayas”, Caracas – Venezuela
Authors: Lenis Cruz Carlos , Llanos Nicoll
Published: October 2023

La Política Nacional Colombiana para la Gestión de Residuos Sólidos Urbanos (RSU) establece que el aprovechamiento de estos materiales es un componente importante en el marco de desarrollo ambiental para el país. Sin embargo, a pesar de las directrices relacionadas con la separación y aprovechamiento de algunos residuos, se ha evidenciado que el compostaje de biorresiduos en Colombia presenta deficiencias de funcionamiento, puesto que los procesos no son adecuados y se obtienen productos que no cumplen con los criterios de calidad para ser aplicados al suelo y pueden representar un riesgo para la productividad y la salud pública. Este artículo presenta la manera correcta para hacer funcional una política de gestión de residuos, que en este caso se refiere a una política con un enfoque de gestión integral. Inicialmente se definen términos relacionados con RSU, se incluyen estudios previos de ejemplos nacionales e internacionales y se señalan los principales impactos ambientales derivados de los problemas por inadecuada disposición de RSU y posibles soluciones. Así mismo se incluyen aspectos administrativos que han hecho del vertedero “Las Mayas” un referente de criterios gerenciales. Las lecciones aprendidas en la administración de este vertedero pueden ser replicadas en vertederos en Colombia. Se concluye que la gestión de los residuos sólidos urbanos (RSU) es una problemática que se debe tratar de forma sistemática por parte de cada ente territorial y que sea en pro de la conservación del medio ambiente. Además, desde la perspectiva ingenieril es factible proponer varias alternativas de tratamientos tecnológicos, políticos y biológicos para poder disminuir la cantidad de residuos a disponer en sitios de disposición, evitando que grandes superficies de terreno sean afectadas ambientalmente.
Caracterización mecánica de fibra de refuerzo para aisladores sísmicos de caucho reciclado
Authors: Espinosa Martínez Juan Esteban , Madera Sierra Ingrid Elizabeth , Rivas Faider Sebastián , Jiménez Juan Camilo
Published: October 2023

El aislamiento sísmico es una de las metodologías de diseño estructural para mitigar o reducir los daños ocasionados por el efecto telúrico, ya que, el uso de estos dispositivos ayuda a la disipación de energía causada por los terremotos. Dentro de estos, se encuentran los aisladores sísmicos de caucho natural, reforzado con materiales como acero (SREIs por sus siglas en inglés) o con fibras (FREIs por sus siglas en ingles). Los dispositivos reforzados con platinas de acero presentan gran peso, llegando hasta una tonelada o más, además, el costo es muy elevado por la labor de preparar las platinas de acero haciendo un proceso muy extenso de manufactura. Por otro lado, los aisladores que se han reforzado con fibra presentan mayor flexibilidad y su rigidez vertical aportada en el aislador es muy similar a la presentada en los SREIs, además, las fibras pueden ser orientadas en cualquier dirección, conduciendo a un mejor comportamiento vertical y reduciendo el abombamiento lateral del elastómero. Se tiene como objetivo caracterizar la fibra de refuerzo para un aislador sísmico de caucho reciclado, a través del ensayo mecánico de Tensión (ASTM C1557-20), donde se espera obtener el módulo de elasticidad para definir si la fibra a emplear podrá comportarse óptimamente en el aislador.