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Dive into the research topics where Marcus Antonius Ynalvez is active.

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Featured researches published by Marcus Antonius Ynalvez.


Social Studies of Science | 2005

Collaboration Paradox Scientific Productivity, the Internet, and Problems of Research in Developing Areas

Ricardo B. Duque; Marcus Antonius Ynalvez; Radhamany Sooryamoorthy; Pn Mbatia; Dan-Bright S. Dzorgbo; Wesley Shrum

We examine the ways in which the research process differs in developed and developing areas by focusing on two questions. First, is collaboration associated with productivity? Second, is access to the Internet (specifically use of email) associated with reduced problems of collaboration? Recent analyses by Lee & Bozeman (2005) and Walsh & Maloney (2003) suggest affirmative answers to these questions for US scientists. Based on a comparative analysis of scientists in Ghana, Kenya, and the State of Kerala in south-western India (N 918), we find that: (1) collaboration is not associated with any general increment in productivity; and (2) while access to email does attenuate research problems, such difficulties are structured more by national and regional context than by the collaborative process itself. The interpretation of these results suggests a paradox that raises issues for future studies: those conditions that unsettle the relationship between collaboration and productivity in developing areas may undermine the collaborative benefits of new information and communication technologies.


New Media & Society | 2011

Are mobile phones changing social networks? A longitudinal study of core networks in Kerala:

Antony Palackal; Pn Mbatia; Dan-Bright S. Dzorgbo; Ricardo B. Duque; Marcus Antonius Ynalvez; Wesley Shrum

Mobile telephony has diffused more rapidly than any Indian technology in recent memory, yet systematic studies of its impact are rare, focusing on technological rather than social change. We employ network surveys of separate groups of Kerala residents in 2002 and again in 2007 to examine recent shifts in mobile usage patterns and social relationships. Results show (1) near saturation of mobiles among both the professionals and nonprofessionals sampled, (2) a decrease in the number of social linkages across tie types and physical locations, and (3) a shift towards friends and family but away from work relationships in the core networks of Malayalis. We interpret these findings as support for the bounded solidarity thesis of remote communication that emphasizes social insulation and network closure as mobiles shield individuals from their wider surroundings.


Scientometrics | 2005

When do scientists “adopt” the Internet? Dimensions of connectivity in developing areas

Marcus Antonius Ynalvez; Ricardo B. Duque; Pn Mbatia; Radhamany Sooryamoorthy; Antony Palackal; Wesley Shrum

SummaryWe examine the diffusion of information and communication technologies (ICTs) in the knowledge production sectors of three developing areas. Using interviews with 918 scientists in one South Asian and two African locations, we address three fundamental questions: (1) To what degree has the research community in the developing world adopted the Internet? (2) How can the disparities in Internet adoption best be characterized? (3) To what extent is Internet use associated with research productivity? Our findings indicate that while the vast majority of scientists describe themselves as current email users, far fewer have ready access to the technology, use it in diverse ways, or have extensive experience. These results are consistent with the notion that Internet adoption should not be characterized as a single act on the part of users. The rapid development of the Internet and the cumulative skills required for its effective use are equally important, particularly its impact on productivity. These findings lead us to qualify crude generalizations about the diffusion of the Internet in developing areas.


International Sociology | 2009

International Graduate Science Training and Scientific Collaboration

Marcus Antonius Ynalvez; Wesley Shrum

Graduate training abroad is typical for scientists in developing countries. Owing to resource scarcities, collaboration is a common form of research for these same individuals. Yet few studies have examined the linkage between graduate education and scientific collaboration. This article examines this question in a population of scientists who have experienced the simultaneous influence of three scientifically strong training systems: Australia, Japan and the US. Survey data from 312 agricultural scientists in two Philippine locations are used to explore the relationships between graduate education, Internet use, professional networks and scientific collaboration. The findings show that most collaboration is domestic, but the most common international collaborations are Japanese, followed by Australian and finally US collaborations. Japanese training, but not professional networks, is associated with such collaborations, while US and Australian training appear unimportant to collaborations in these locations. This the article explains by identifying two aspects integral to graduate education, mode of study and mentoring style , which may be critical to the development of durable professional ties and ultimately to collaborative work. The results show that even among scientific training systems in developed areas, there are variations in interaction and practices that have implications for differential participation in scientific collaboration.


Plant Disease | 1999

Analysis of DNA Polymorphism and Virulence in Philippine Strains of Xanthomonas oryzae pv. oryzicola

A. K. Raymundo; A. M. Briones; E. Y. Ardales; M. T. Perez; L. C. Fernandez; Jan E. Leach; T. W. Mew; Marcus Antonius Ynalvez; C. G. McLaren; Rebecca J. Nelson

Molecular tools were used to analyze the genetic diversity and population structure of Xanthomonas oryzae pv. oryzicola, the bacterial leaf streak pathogen of rice in the Philippines. Representative pathogen strains were selected and used to assess resistance in rice germplasm. A partial genomic library of X. oryzae pv. oryzicola was constructed, and a 459-bp clone containing the repetitive DNA element R41 was selected as a probe for restriction fragment length polymorphism (RFLP) analysis and sequenced. R41 shared 44% sequence homology with the putative transposase gene of IS1112, an insertion element cloned from X. oryzae pv. oryzae. Using R41 as a probe for RFLP analysis, 26 band profiles were discerned in a collection of 123 strains of X. oryzae pv. oryzicola. Analysis of PstI digestion patterns of DNA from the same collection resolved 36 haplotypes. Several clusters of strains were detected after grouping of data based on either pR41 as a probe or Pst1 digestion patterns. However, based on bootstrap analysis, the clusters were not robust. Genetic diversity was high for the entire collection as well as within spatially and temporally defined subsets of strains. Even a set of strains collected from a single site at a single time was highly diverse. Strains representing the different DNA types were inoculated to a set of diverserice cultivars. Consistent rice varietal groupings were obtained from disease reaction data, but there was no correlation between pathogen isolate cluster and host reaction across inoculation trials. Isozyme group I of rice, representing tropical japonica and javanica germplasm, is a promising source of resistance to bacterial leaf streak.


Perspectives on Global Development and Technology | 2006

International Training and the Digital Divide: Computer and Email Use in the Philippines

Marcus Antonius Ynalvez; Wesley Shrum

We describe digital technology utilization among knowledge producers who have experienced the alternative training structures. Using data from a face-to-face survey of Filipino scientists, we measure email utilization by scientists in terms of five aspects of access and use, and examine how they vary across place of graduate education. Our questions are: (1) How can we characterize peripheral scientists in terms of their contextual, personal, professional, and educational attributes? (2) How can we characterize their utilization of digital technology? (3) Are there indications that core-based graduate training translates into yet another significant dimension in digital inequality? Our finding suggests that the Philippine scientific system largely reflects the perspective of core-trained male scientists. Filipino scientists are able to utilize digital technology—personal computers, email, and the World Wide Web—but with important qualifications. While scientists at the core have the luxury of architectural, digital, and personal privacy in hardware-software-user interaction, such is not the case for Filipino scientists, who in general have to share digital resources in public spaces within formal organizations. Finally, place of graduation emerges as a new form shaping digital utilization and inequality. The diffusion of digital technology into peripheral scientific systems has been uneven along this newly emerging dimension. Digital inequality construed as simple hardware-software access and use is diminishing, but inequality at the level of advanced hardware-software interaction skills is fast emerging as a new dimension that encapsulates postcolonial relations in science.


Scientometrics | 2008

International graduate training, digital inequality and professional network structure: An ego-centric social network analysis of knowledge producers at the “Global South”

Marcus Antonius Ynalvez; Wesley Shrum

Based on a face-to-face survey of 312 scientists from government research institutes and state universities in two Philippine locations — Los Baños, Laguna and Muñoz, Nueva Ecija — we examine how graduate training and digital factors shape the professional network of scientists at the “Global South.” Results suggest that scientists prefer face-to-face interaction; there is no compelling evidence that digitally-mediated interaction will replace meaningful face-to-face interaction. What is evident is that among none face-to-face modes of communication a reordering maybe in progress.The effect of digital factors — expressed through advance hardware-software-user interaction skills — lies on network features pertaining to size, proportion of male and of core-based alters, and locational diversity. International graduate training and ascribed factors (gender and number of children) also configure the professional network of scientists — actors traditionally viewed as the epitome of rationality and objectivity. We argue that these factors influence knowledge production through a system of patronage and a culture that celebrates patrifocality. We forward the hypothesis that knowledge production at the “Global South” closely fits Callon’s [1995] extended translation model of science.


Biochemistry and Molecular Biology Education | 2014

Research experiences and mentoring practices in selected east asian graduate programs: Predictors of research productivity among doctoral students in molecular biology

Ruby Ynalvez; Claudia Garza-Gongora; Marcus Antonius Ynalvez; Noriko Hara

Although doctoral mentors recognize the benefits of providing quality advisement and close guidance, those of sharing project management responsibilities with mentees are still not well recognized. We observed that mentees, who have the opportunity to co‐manage projects, generate more written output. Here we examine the link between research productivity, doctoral mentoring practices (DMP), and doctoral research experiences (DRE) of mentees in programs in the non‐West. Inspired by previous findings that early career productivity is a strong predictor of later productivity, we examine the research productivity of 210 molecular biology doctoral students in selected programs in Japan, Singapore, and Taiwan. Using principal component (PC) analysis, we derive two sets of PCs: one set from 15 DMP and another set from 16 DRE items. We model research productivity using Poisson and negative‐binomial regression models with these sets as predictors. Our findings suggest a need to re‐think extant practices and to allocate resources toward professional career development in training future scientists. We contend that doctoral science training must not only be an occasion for future scientists to learn scientific and technical skills, but it must also be the opportunity to experience, to acquire, and to hone research management skills.


Journal of School Nursing | 2013

School-located influenza vaccination and absenteeism among elementary school students in a Hispanic community.

Patricia C. Keck; Marcus Antonius Ynalvez; Hector F. Gonzalez; Keila D. Castillo

Seasonal influenza is recognized as a significant health burden to children and is a cause of excess school absenteeism in children. In 2008, the Advisory Committee on Immunization Practices recommended annual influenza vaccination for all children 6 months to 18 years of age. School nurses influence participation in this recommendation by conducting school-located influenza vaccination (SLIV) programs at their campuses. Knowing the effect of SLIV programs on student absenteeism may motivate school nurses and district administrators to conduct such vaccination programs. This study examines the impact of an SLIV program on elementary school absenteeism in an inner city school district with a predominantly Hispanic population. Using Poisson regression models with robust standard errors, we analyzed data from 3,775 records obtained by stratified random sampling. Results of the study indicate that students vaccinated through an SLIV program have fewer absences than unvaccinated students. A surprising result of the study shows that students vaccinated through an SLIV program had fewer absences than students vaccinated elsewhere. These results are of particular importance to school nurses who work with large Hispanic populations. Our study illustrates one way that a school nurse can assess the effect of an SLIV program on absenteeism.


International Journal of Information Management | 2013

Out of Asia: Understanding the nexus between technology usage and research productivity in Japan, Singapore, and Taiwan

Akshay Bhagwatwar; Noriko Hara; Marcus Antonius Ynalvez

Abstract Journal and conference publications are well-known measures of scientific and academic research productivity. Prior research on scientific productivity that studies dimensions such as research culture, technological support, and researcher collaboration focuses on Western world contexts. Asian countries, such as Japan, Singapore, and Taiwan have received attention recently for the quality of their educational institutions, which have increasingly emphasized research productivity. With a large number of established and funded public universities, these countries show a strong potential for future scientific research. Consequently, it is crucial to understand the factors that influence the research productivity of scholars in these countries. In this paper the focus is specifically on the research productivity of students and faculty members in three countries: Singapore, Taiwan, and Japan. We investigate an important factor that influences research productivity: technology usage, which we conceptualize as the summation of mobile phone and computer usage. In addition, we analyze the relationship between technology usage and international collaboration.

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Wesley Shrum

Louisiana State University

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Ricardo B. Duque

Louisiana State University

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Noriko Hara

Indiana University Bloomington

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Pn Mbatia

University of Nairobi

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Yoshinori Kamo

Louisiana State University

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