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Kenneth L. Medina(Kenneth L. Medina ),Jeanette Angeline B. Madamba(Jeanette Angeline B. Madamba ),James Roldan S. Reyes(James Roldan S. Reyes ),Agnes T. Banzon(Agnes T. Banzon ),Arlene C. Gutierrez(Ar 아시아무역학회 2022 Journal of Asia Trade and Business Vol.9 No.1
Purpose - Most studies on entrepreneurial intention were focused on developed countries. In developing and agriculture-based economies like the Philippines, there is limited entrepreneurial intention studies conducted among university students, who are potential entrepreneurs in the country. This study intends to bridge this gap by providing insights about the entrepreneurial inclination and entrepreneurial intention of Bachelor of Science in Agriculture (BSA) students at the University of the Philippines Los Baños (UPLB). Design/Methodology/Approach - Ajzen’s (1991) Theory of Planned Behavior (TPB) was utilized to explore factors affecting the entrepreneurial intention of the BSA students. A total of 108 students were surveyed using an online questionnaire, and data analysis tools included Cronbach’s alpha, frequency analysis, chi-square, and binary logistic regression. Data analysis focused on each batch of students. Findings - The study found that Batch 2012 and below showed a greater number of students with high personal attitude, perceived behavioral control, and entrepreneurial intention. On the other hand, Batch 2015 students exhibited the lowest entrepreneurial intention. Generally, the respondents had high entrepreneurial intention; however, low perceived behavioral control or self-efficacy was also recorded. In terms of entrepreneurial inclination, all batches showed high inclination, except for Batch 2015, where the majority of the students did not have an entrepreneurial role model and had not taken an entrepreneurship course or subject. An equation model was constructed for Batch 2015 students, wherein personal attitude and subjective norm were found to be significant with intention. Research Implications - The study findings imply the need for certain colleges in UPLB to undertake strategies tailor-fit for addressing gaps in entrepreneurial inclination and intention for every batch.
Rheological behavior of blood in Wistar rats with different total cholesterol levels
Medina-Torres Luis,Calderas Fausto,Calderas Fausto,Núñez–Ramírez Diola-Marina,Castro Andrés Navarrete,Bernad-Bernad Ma. Josefa,Manero Octavio 한국유변학회 2022 Korea-Australia rheology journal Vol.34 No.4
Blood is a rheologically complex suspension, in which the soluble fraction contains proteins, total cholesterol and triglycerides. The blood rheological behavior is strongly affected by the concentration of these components. This work evaluates the total cholesterol effect on the rheological behavior of Wistar rat blood by means of an in vitro study. Twenty-one rats were divided into 3 groups, each one had an assigned diet with different fat content: reference group (RG) with 3%, medium fat content group (MG) with 4.5% and high-fat content group (HG) with 6.5%; in the latter group, mixed-vegetable fat was added. From each group, intraocular representative blood samples were taken with time lapse of 15 days between each sampling followed by biochemical and hemo-rheological tests. The first analysis detected changes in total cholesterol levels, attributed to the rat metabolism, formation of adipose tissue and competition for food. The second test consisted in steady simple-shear and linear oscillatory flow. The linear viscoelastic spectra reveal that the viscous modulus is larger than the elastic modulus (G > G′), with simple-shear viscosity exhibiting shear-thinning behavior. An important finding is a pseudo-solid- like behavior at low frequencies (1 rad/s) akin to the presence of yield stresses in the high-fat content group after 30 days, revealing strong interactions between total cholesterol levels and blood cells. The hemo-rheological tests represent a promising alternative to identify pathologies present in the blood (total cholesterol, digestive problems, and diabetes).
Parodia, simulacrum y creacio´n en Ficciones de Jorge Luis Borges
Medina, Manuel F. 한국외국어대학교 중남미연구소 2001 중남미연구 Vol.20 No.1
Debido al éxito editorial y la gran acogida de la crítica Ficciones(1944) de Jorge Luis Borges(1899-1986) se ha convertido en obra clásica tanto de la literatura hispanoarnericana como de la universal. La prolífica crítica vertida sobre esta obra abarca la producción de múltiples generaciones de estudiosos, pertenecientes a diferentes culturas y disciplinas. Borges se ha mantenido vigente aún durante los cambios trascendentales que ha venido experimentado el campo del análisis literario desde hace cuarenta anos. El acercamiento a sus cuentos empleando los postulados de la filosofia occidental ha expuesto cómo Borges ha trasplantado emitidos de los filósofos, en su mayoría occidentales, en suobra. Críticos postmodernos, partiendo de posiciones iniciadas por Jacques Derrida, y secundadas por Michel Foucault, Linda Hutcheon, François Lyotard entre otros han exitosamente demostrado que el mundo carece del orden lógico que previamente se le había atribuido y han aplicado este eoncepto a la interpretación de obras de arte y de literatura. Las nuevas lecturas sobre Borges han borrado, usando el término en el sentido derridiano, la certeza provista por lecturas del pasado y ofrecido un método basado en el cuestionar de teorías aceptadas y establecidas. Mi análisis cabe dentro de este viaje desde la quasi-estabilidad modernista a las múltiples posibilidades abiertas por las teorías postmodernistas y post-estructuralistas para estudiar el concepto de la creación de mundos y el orden establecido en los cuentos de Borges.
Medina-Jaime, Alma Delia,Reyes-Vargas, Francianella,Martinez-Gaytan, Victoria,Zambrano-Galvan, Graciela,Portillo-DelCampo, Eduardo,Burciaga-Nava, Jorge Alberto,Reyes-Romero, Miguel,Sifuentes-Alvarez, Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.7
The aim of this work was to analyze methylation of the promoter sites of the ESR1 and PGR genes and to determine correlations with immunohistochemical expression of estrogen and progesterone receptors in ductal and lobular breast cancers. An observational, descriptive, molecular study was conducted on 20 ductal and 20 lobular breast cancer samples with immunohistochemical determination of estrogen and progesterone receptor expression. The methylation analysis of ESR1 and PGR promoter sites was carried-out by methylation-specific PCR. For correlation analysis, Kendall's tau coefficient was determined. Positive correlations were found between estrogen and progesterone receptors, estrogen receptor and unmethylated progesterone receptor, progesterone receptor, and unmethylated progesterone receptor. Negative correlations were found between estrogen receptor and methylated progesterone receptor, progesterone receptor and methylated progesterone receptor, methylated and unmethylated estrogen receptor, and methylated and unmethylated progesterone receptor. The results suggest that methylation of promoter sites of ESR1 and PGR is a relatively uncommon event in ductal and lobular breast cancer, and also suggest that the determination of epigenetic states of ESR1 and PGR could represent an alternative or complement to the histopathological expression analysis.
Fine Pointing and Tracking Onboard System for CubeSat Optical Satcom
I. Medina,J. J. Hernández-Gómez,C. Couder-Castañeda 한국항공우주학회 2023 International Journal of Aeronautical and Space Sc Vol.24 No.5
Satellite data transmissions are complex due to the various factors that intervene in them. Many institutions have opted for laser communications in search of high data transmission rates, reduced size and weight, lower costs, and low power consumption, unlike radio-frequency communications. However, optical links require tremendously precise pointing and tracking since poor pointing can yield connection errors. Thus, fine pointing is required, with the ability to redirect the transceptor with exceptionally delicate motions, allowing a stable link within the sight window. In this work, the development of a pointing, acquisition, and tracking subsystem consisting of a computer vision system is presented, capable of recognising and detecting a guide beam emitted by an optical ground station, together with a fuzzy logic controller for servomotors to perform the tracking phase. The fine-pointing system was implemented on a printed circuit board for a trouble-free and adequate interface to communicate with any microprocessor. The outcome shows that the system can follow and identify the indicated beam amongst many other light sources at short and long distances. Likewise, the pointing accuracy was found to be within the same order of magnitude as the minimum required, showing that an onboard active tracking system for laser communications within a CubeSat is feasible. Ultimately, this research serves as an alternative method for the future development of affordable narrow-beam tracking systems for nanosatellite applications.
José Medina-Polo,Raquel Sopeña-Sutil,Raúl Benítez-Sala,Alba Lara-Isla,Manuel Alonso-Isa,Javier Gil-Moradillo,Juan Justo-Quintas,Esther García-Rojo,Daniel Antonio González-Padilla,Juan Bautista Passas- 대한비뇨의학회 2017 Investigative and Clinical Urology Vol.58 No.1
Purpose: Healthcare-associated infections (HAIs) in urological patients have special features due to specific risk factors. Our objective was to evaluate the characteristics and risk factors for HAIs in patients hospitalized in a Urology ward. Materials and Methods: We evaluated prospectively, from 2012 to 2015, the incidence, types and risk factor for HAIs, microbiological and resistance patterns. Results: The incidence of HAIs was 6.3%. The most common types were urinary infections (70.5%) and surgical site infections (22.1%). Univariate analysis showed an increased risk of HAIs among patients with American Society of Anesthesiologists physical status classification system III–IV (odds ratio [OR], 1.39; p<0.001), immunosuppression (OR, 1.80; p=0.013), previous urinary infection (OR, 4.46; p<0,001), and urinary catheter before admission (OR, 1.74; p<0.001). The surgical procedures with the highest incidence of HAIs were radical cystectomy (54.2%) and renal surgery (8.7%). The most frequently isolated microorganisms were Escherichia coli (25.1%), Enterococcus spp. (17.5%), Klebsiella spp. (13.5%) and Pseudomonas aeruginosa (12.3%). Enterococcus sp was the most common microorganism after radical cystectomy and in surgical site infections, E. coli showed resistance rates of 53.5% for fluoroquinolones, 9.3% for amikacin. The percentage of extended-spectrum betalactamase producing E. coli was 24.7%. Klebsiella spp. showed resistance rates of 47.8% for fluoroquinolones, 7.1% for amikacin and 4.3% for carbapenems. Enterococcus spp showed resistance rates of 1.7% for vancomycin and; P. aeruginosa of 33.3% for carbapenems and 26.2% for amikacin. Conclusions: Comorbidities, previous urinary infections, and urinary catheter are risk factors for HAIs. The microorganisms most commonly isolated were E. coli, Enterococcus and P. aeruginosa. Prospective monitoring may decrease the incidence of infections.