De La Salle University

About: De La Salle University is a education organization based out in Manila, Philippines. It is known for research contribution in the topics: Population & Computer science. The organization has 2951 authors who have published 4374 publications receiving 49567 citations. The organization is also known as: Pamantasang De La Salle.

Tight Graphs and Their Primitive Idempotents

Abstract: In this paper, we prove the following two theorems. Theorem 1 Let Γ denote a distance-regular graph with diameter d ≥ 3. Suppose E and F are primitive idempotents of Γ, with cosine sequences σ_0, σ_1, …, σ_d and ρ_0, ρ_1, …, ρ_d, respectively. Then the following are equivalent. (i) The entry-wise product E F is a scalar multiple of a primitive idempotent of Γ. (ii) There exists a real number e such that Let Γ denote a distance-regular graph with diameter d ≥ 3 and eigenvalues t_0 > t_1 > … > t_d. Then Jurisic, Koolen and Terwilliger proved that the valency k and the intersection numbers a_1, b_1 satisfy They defined Γ to be tight whenever Γ is not bipartite, and equality holds above. Theorem 2 Let Γ denote a distance-regular graph with diameter d ≥ 3 and eigenvalues t_0 > thetas;_1 > … > t_d. Let E and F denote nontrivial primitive idempotents of Γ. (i) Suppose Γ is tight. Then E, F satisfy (i), (ii) in Theorem 1 if and only if E, F are a permutation of E_1, E_d. (ii) Suppose Γ is bipartite. Then E, F satisfy (i), (ii) in Theorem 1 if and only if at least one of E, F is equal to E_d. (iii) Suppose Γ is neither bipartite nor tight. Then E, F never satisfy (i), (ii) in Theorem 1.

Validating the Academic Self-regulated Learning Scale with the Motivated Strategies for Learning Questionnaire (MSLQ) and Learning and Study Strategies Inventory (LASSI)

Abstract: The present study further established the construct validity of the Academic Self-regulated Learning Scale (A-SRL-S, Magno, 2010) through its functional correlation with the Motivated Strategies for Learning Questionnaire (MSLQ) and Learning and Study Strategies Inventory (LASSI). The three questionnaires were administered to 755 college students from different universities in the National Capital Region in the Philippines. All subscales of the three instruments had significant intercorrelations (p<.001). Three measurement models, using Confirmatory Factor Analysis were tested to determine which best explains the construction of the A-SRL-S. A two factor model where the A-SRL-S was combined with MLSQ with LASSI on a separate factor turned to have a bad fit

Measuring Hope in the Philippines: Validating the Short Version of the Locus-of-Hope Scale in Filipino

Abstract: A short version of the locus-of-hope Scale was developed and translated into the Filipino language for the purpose of assessing hope in Filipinos who have lower levels of education and who may not have adequate levels of proficiency in English. The 20-item scale had four locus-of-hope subscales (internal, external-family, external-peers, and external-spiritual) each with four items (another four were filler items); all items described thoughts associated with some capacity and strategy to attain important goals in life. A sample (N = 362) of adults from communities in Metro Manila were asked to answer the scale, as well as measures of optimism, self-esteem, and life satisfaction. Confirmatory factor analysis indicated an adequate fit between the hypothesized four-factor structure and the data, but the internal locus-of-hope scale was found to have low internal consistency. Regression analysis showed positive associations between the internal and external-family locus-of-hope subscales and the three measures of wellbeing. But external-peers locus-of-hope was negatively associated with optimism and self-esteem, and external-spiritual locus-of-hope was positively related with optimism.

Application of stochastic analytic hierarchy process for evaluating algal cultivation systems for sustainable biofuel production

Abstract: Algal biomass is considered as a promising source of alternative fuel energy given its high yield per land area and other potential benefits. Categorized as an advanced generation biofuel feedstock, microalgae are grown in non-conventional ways through different cultivation systems. A preference of a cultivation system may vary depending on a given scenario and its inherent configuration (strength and weakness). Hence, the usage of a specific cultivation system to sustainably produce algal biofuels depends on various factors. Thus, a multi-criteria approach based on analytic hierarchy process (AHP) is proposed for evaluating alternative cultivation systems for sustainable production of algal biofuels. The main criteria considered to evaluate the alternatives based on consultation with a panel of expert and from literature are environmental impact, energy consumption, economic viability, social acceptability, and system robustness. Sub-criteria were identified under each main criterion to further qualify the analysis into relevant sub-factors in the sustainable production of algal biofuels. Three cultivations systems were used as an example to demonstrate the developed decision model using qualitative data and quantitative data. Probabilistic scenarios were analyzed using stochastic approach via Monte Carlo simulation. The results of the stochastic-based AHP showed which cultivation system is preferred for conservative (risk-averse) and optimistic (risk-inclined) scenarios.