Includes bibliographical references.

On Self-Reducibility and Reoptimization of Closest Substring Problem -- Homogeneous and other Weight Functions -- Graph an Information Theoretic Analysis of Correlation between Stock Market Indices -- A System for Sensing Human Sentiments to Augment a Model for Predicting Rare Lake Events -- Multi-Campus Implementation of University Information Systems.

[Article Title: On Self-Reducibility and Reoptimization of ClosestSubstring Problem/ Jeffrey A. Aborot, Henry Adorna, and Jhoirene B. Clemente, p. 1-8



Abstract: In this paper, we define the reoptimization variant of theclosest substring problem (CSP) under sequence addition.We show that, even with the additional information we haveabout the problem instance, the problem of finding a closestsubstring is still NP-hard. We investigate the combinatorialproperty of optimization problems called self-reducibility.We show that problems that are polynomial-time reducibleto self-reducible problems also exhibits the same property.We illustrate this in the context of CSP. We used the prop-erty to show that although we cannot improve the approx-imability of the problem, we can improve the running timeof the existing PTAS for CSP.

https://pcj.csp.org.ph/index.php/pcj/issue/view/21/PCJ%20V10%20N2%20pp1-8%202015

[Article Title: Homogeneous and other Weight Functions on Fq[u1,u1,...,ul]/ (u2i)/ Jane D. Palacio, Pierre Allan K. Santiago, and John Paul V. Guim, p. 9-15]

Abstract: Letq=pmbe a power of a primepandm,l2N. Denote byFqthe Galois field of characteristicpand cardinalityq.Inthis paper, the ringR(q,l)=Fq[u1,u2,...,ul]/u2iwhichis a non-principal ideal ring Frobenius ring was examined.The ring has been shown to be isomorphic to a ring of poly-nomials overFqand a subring of the ring of 2l⇥2luppertriangular matrices overFq. The latter isomorphism wasthen used to define a weight function onR(q,l) called theMB-weight some of which are egalitarian. Following the def-inition of the weight defined by Bachoc onR(p,1), a Bachocweight onR(2,l) was defined. Conditions on the parametersmandlof the ring were determined in order for the Bachocweight to be homogeneous. Lastly, a generating characteronR(q,l) was obtained in order to derive a homogeneousweight on the ring for anyqandl.

https://pcj.csp.org.ph/index.php/pcj/issue/view/21/PCJ%20V10%20N2%20pp9-15%202015

[Article Title: Graph and Information Theoretic Analysis of Correlationbetween Stock Market Indices/ Gabriel Dominik E. Sison, Ulyses A. Solon Jr., Aimee B. Rarugal, Guido David, and Giovanni A. Tapang, p. 16-19]

Abstract: Most economies today are interrelated. The push towardsone globally connected community lead to having countrieswhich depend on one another, not just as governments butalso as businesses aiming to improve economic output. Thispaper concerns itself with identifying countries, being rep-resented by their main stock market indices, as agents de-termining each other’s behaviour. We look at the behaviourof each index in a fixed time interval (1998-2014) and re-late it with the behaviour of other indices using correlation,network theory and transfer entropy. From the graphs, wedetermined communities based on geographical basis andthat FTSE is highly influenced by the past values of otherstock market indices.

https://pcj.csp.org.ph/index.php/pcj/issue/view/21/PCJ%20V10%20N2%20pp16-19%202015

[Article Title: A System for Sensing Human Sentiments toAugment a Model for Predicting Rare Lake Events/ Jaderick P. Pabico, p. 20-32]

Abstract: Fish kill events (FKE) in the caldera lake of Taal occurrarely (only 0.5% in the last 10 years) but each eventhas a long-term effect on the environmental health ofthe lake ecosystem, as well as a devastating effect on thefinancial and emotional aspects of the residents whoselivelihood rely on aquaculture farming. Predicting withhigh accuracy when within seven days and where onthe vast expanse of the lake will FKEs strike will be avery important early warning tool for the lake’s aqua-culture industry. Mathematical models to predict theoccurrences of FKEs developed by several studies donein the past use as predictors the physico-chemical char-acteristics of the lake water, as well as the meteoro-logical parameters above it. Some of the models, how-ever, did not provide acceptable predictive accuracy andenough early warning because they were developed withunbalanced binary data set, i.e., characterized by densenegative examples (no FKE) and highly sparse posi-tive examples (with FKE). Other models require set-ting up an expensive sensor network to measure thewater parameters not only at the surface but also atseveral depths. Presented in this paper is a systemfor capturing, measuring, and visualizing the contex-tual sentiment polarity (CSP) of dated and geolocatedsocial media microposts of residents within 10km radiusof the Taal Volcano crater (14◦N, 121◦E). High fre-quency negative CSP co-occur with FKE for two occa-sions making human expressions a viable non-physicalsensors for impending FKE to augment existing math-ematical models.

https://pcj.csp.org.ph/index.php/pcj/issue/view/21/PCJ%20V10%20N2%20pp20-32%202015

[Article Title: Multi-Campus Implementation of University Information Systems/ Jaime DL. Caro, Rommel P. Feria, Ariel S. Betan, Annette G. Lagman, Rowena C. Solamo, and Paulo Noel G. Paje, p. 33-39]

Abstract: The e-UP Project is one of the flagship projects of the University of the Philippines Administration. It is based on a 5-year plan geared towards the design, development and implementation of a seamless and integrated University-wide Information and Communication (ICT) system. A key component of the project is the implementation of several key university information systems such as Student Academic information System (SAIS), Human Resource Information System (HRIS), Financial Management Information system (FMIS), Supplies Procurement and Campus Management Information System (SPCMIS), and Executive Information System (EIS). The implementation will provide an environment conducive to the quality performance of the University's core functions. It will address the ICT needs of students, faculty and administrative staff as well as enable the University to render efficient administration through the integration of constituent universities and interoperability of all systems through shared databases, online document management, and appropriate ICT infrastructure. This paper reviews the implementation methodology and discusses the issues and challenges faced, as well as the lessons learned in implementing so many information systems in a multi-campus university system.

https://pcj.csp.org.ph/index.php/pcj/issue/view/21/PCJ%20V10%20N2%20pp33-39%202015