SCHEMA- BROADENING INSTRUCTION IN GRADE 9 MATHEMATICS

This pre-experimental study is aimed to present the effects of using the Schema- Broadening Instruction (SBI) to the Mathematics performance of one Grade 9 class at a barangay high school in the Philippines. The study used a modified approach of SBI that adopted the use of the following visual and procedural schemes: (a) The Frayer Model; (b) Visual representations of variation equations; and (c) Polya’s Four Steps in Problem Solving. The modified approach of SBI has also incorporated the use of structured (for concept formation) and open inquiry-based (for problem solving) activities. The approach aimed to reduce the students’ cognitive load in learning Mathematics by introducing visual and procedural schemas. Schemas can be handled with very little conscious effort once acquired and automated. Hence, can reduce students’ working memory load (Ericson, 2005). Results from the study showed that the students gained a wonderful experience of learning through the modified approach of Schema-Broadening Instruction. The students also showed capabilities of learning through structured forms of activities were guide questions and steps were provided for them in generalizing the concepts of the topic. But the Grade 9 students showed unreadiness for open inquiry-based activities and were not yet capable of constructing their own procedure in problem solving. The students preferred to be guided towards the step by step solution instead. Data gathered also showed that the approach has improved the students’ conceptual understanding that lead all the students to mastery. The students’ performance under problem solving also showed improvements but was not enough for all the students to gain mastery. Future scope for the study would be to develop validated visual and procedural schemas that can further reduce cognitive overload in learning Mathematics

Self-Management and Team-Making in Cross-Functional Work Teams: Discovering the Keys to Becoming an Integrated Team

Project teams are rapidly becoming the primary mechanisms for innovation and change in modern organizations. As such, they are designed to capitalize on leadership and integrated cross-functional teamwork and to negate subordination and individual gamesmanship. Unfortunately, research on cross-functional project teams is scarce and largely atheoretical. The increasing use of these project teams by modern organizations, however, calls for theory development in this area. In the present paper, self-management and team-making models are applied to cross-functional project designs to develop a theoretical framework for the investigation of teamwork effectiveness for integrated cross-functional project teams. Future issues for theory development and research methodology are presented

Leadership Ethics

Research into the topic of leadership ethics has grown and evolved gradually over the past few decades. This timely set arrives at an important moment in the subject\u27s history. In a relatively new field, such a collection offers scholars more than articles on a topic; it also serves to outline the parameters of the field. Carefully structured over three volumes, the material runs through an understanding of the key philosophic and practical questions in leadership ethics along with a wide range of literature - from disciplines including philosophy, business and political science, to name a few- that speaks to these questions.https://scholarship.richmond.edu/bookshelf/1031/thumbnail.jp

High Dimensional Forecasting via Interpretable Vector Autoregression

Vector autoregression (VAR) is a fundamental tool for modeling multivariate time series. However, as the number of component series is increased, the VAR model becomes overparameterized. Several authors have addressed this issue by incorporating regularized approaches, such as the lasso in VAR estimation. Traditional approaches address overparameterization by selecting a low lag order, based on the assumption of short range dependence, assuming that a universal lag order applies to all components. Such an approach constrains the relationship between the components and impedes forecast performance. The lasso-based approaches work much better in high-dimensional situations but do not incorporate the notion of lag order selection. We propose a new class of hierarchical lag structures (HLag) that embed the notion of lag selection into a convex regularizer. The key modeling tool is a group lasso with nested groups which guarantees that the sparsity pattern of lag coefficients honors the VAR's ordered structure. The HLag framework offers three structures, which allow for varying levels of flexibility. A simulation study demonstrates improved performance in forecasting and lag order selection over previous approaches, and a macroeconomic application further highlights forecasting improvements as well as HLag's convenient, interpretable output

On subgroups in division rings of type 22

Let $D$ be a division ring with center $F$. We say that $D$ is a {\em division ring of type $2$} if for every two elements $x, y\in D,$ the division subring $F(x, y)$ is a finite dimensional vector space over $F$. In this paper we investigate multiplicative subgroups in such a ring.Comment: 10 pages, 0 figure

The topographical anatomy of the round window and related structures for the purpose of cochlear implant surgery

The treatment of total deafness using a cochlear implant has now become a routine medical procedure. The tendency to expand the audiological indications for cochlear stimulation and to preserve the remnants of hearing has brought new problems. The authors have studied the topographical anatomy of the internal structures of the ear in the area where cochleostomy is usually performed and an implant electrode inserted. Ten human temporal bones were obtained from cadavers and prepared in a formalin stain. After dissection of the bone in the area of round and oval windows, the following diameters were measured using a microscope with a scale: the transverse diameters of the cochlear and vestibular scalae at the level of the centre of the round window and 0.5 mm anteriorly to the round window, the distance between the windows and the distances from the end of the spiral lamina to the centre of the round window and to its anterior margin. The width of the cochlear scala at the level of the round window was 1.23 mm, and 0.5 mm anteriorly to the round window membrane it was 1.24 mm. The corresponding diameters for the vestibular scala are 1.34 and 1.27 mm. The distances from the end of the spiral lamina to the centre of the round window and to its anterior margin are 1.26 and 2.06 respectively. The authors noted that the two methods of electrode insertion show a difference of 2 mm in the length of the stimulated spiral lamina. The average total length of the unstimulated lamina is 2.06 and 4.06 in the two situations respectively

Devitalization of Glioblastoma Cancer Cells by Non-invasive Physical Plasma: Modulation of Proliferative Signalling Cascades

Background/Aim: Glioblastoma (GBM) is the most common and most lethal type of cancer of the central nervous system in adults. Despite aggressive treatment, which is based on surgical resection, if possible, followed by radiation and chemotherapy, a high recurrence rate and therapy resistance is observed. Thus, additional innovative therapies are urgently needed to improve the poor median survival of only 15 months. Treatment of solid tumours with non-invasive physical plasma (NIPP) represents such a novel and innovative anticancer procedure. Materials and Methods: In this study, we investigated the effect of NIPP, an ionized argon gas, on the in vitro growth of human GBM cell lines, LN-18 and U-87 MG. Proliferation was measured by live cell count. Subsequently, proliferative factors were analysed at the level of nucleic acids (polymerase chain reaction) and proteins (western blotting). Results: For both GBM lines, a treatment time-dependent decrease in growth was observed compared to controls. Additionally, NIPP treatment resulted in reduced rates of AKT serine/threonine kinase 1 (AKT1) and extracellular-regulated kinase 1/2 ERK1/2 expression, whereas expression of p21, proliferating cell nuclear antigen, and heat-shock proteins 90α and 90β was not affected. In both cell lines, a strong increase in expression of tumour-suppressive microRNA-1 (miR-1) was detected after exposure to NIPP. Conclusion: Our results demonstrated that NIPP is able to efficiently attenuate growth of GBM cells and suggest AKT1, ERK1/2 and miR-1 to be pivotal factors of NIPP-modulated cellular signalling. Translated into the clinical setting, NIPP may represent a promising option for the treatment of GBM

A critical reflection of current trends in discourse analytical research on leadership across disciplines. A call for a more engaging dialogue

This paper takes the frequently lamented state of current leadership research in business and organisational sciences as a starting point and argues for a more open and engaging dialogue with leadership researchers in applied linguistics and pragmatics. Focusing on current debates around terminological issues and methodological questions that are particularly prominent in critical leadership studies, we show that research in applied linguistics and pragmatics has the potential to make important contributions by providing the analytical tools and processes to support critical leadership researchers in their quest to challenge hegemonic notions of leadership by moving beyond simplistic and often problematic leader-follower dichotomies and by providing empirical evidence to capture leadership in situ thereby feeding into current theorisations of leadership

Physical Electronics

Contains reports on four research projects