Anthropomorphic user interface feedback in a sewing context and affordances

The aim of the authors' research is to gain better insights into the effectiveness and user satisfaction of anthropomorphism at the user interface. Therefore, this paper presents a between users experiment and the results in the context of anthropomorphism at the user interface and the giving of instruction for learning sewing stitches. Two experimental conditions were used, where the information for learning sewing stitches was the same. However the manner of presentation was varied. Therefore one condition was anthropomorphic and the other was non-anthropomorphic. Also the work is closely linked with Hartson's theory of affordances applied to user interfaces. The results suggest that facilitation of the affordances in an anthropomorphic user interface lead to statistically significant results in terms of effectiveness and user satisfaction in the sewing context. Further some violation of the affordances leads to an interface being less usable in terms of effectiveness and user satisfaction

Inapproximability of the Standard Pebble Game and Hard to Pebble Graphs

Pebble games are single-player games on DAGs involving placing and moving pebbles on nodes of the graph according to a certain set of rules. The goal is to pebble a set of target nodes using a minimum number of pebbles. In this paper, we present a possibly simpler proof of the result in [CLNV15] and strengthen the result to show that it is PSPACE-hard to determine the minimum number of pebbles to an additive $n^{1/3-\epsilon}$ term for all $\epsilon > 0$, which improves upon the currently known additive constant hardness of approximation [CLNV15] in the standard pebble game. We also introduce a family of explicit, constant indegree graphs with $n$ nodes where there exists a graph in the family such that using constant $k$ pebbles requires $\Omega(n^k)$ moves to pebble in both the standard and black-white pebble games. This independently answers an open question summarized in [Nor15] of whether a family of DAGs exists that meets the upper bound of $O(n^k)$ moves using constant $k$ pebbles with a different construction than that presented in [AdRNV17].Comment: Preliminary version in WADS 201

Supersolid and solitonic phases in one-dimensional Extended Bose-Hubbard model

We report our findings on quantum phase transitions in cold bosonic atoms in a one dimensional optical lattice using the finite size density matrix renormalization group method in the framework of the extended Bose-Hubbard model. We consider wide ranges of values for the filling factors and the nearest neighbor interactions. At commensurate fillings, we obtain two different types of charge density wave phases and a Mott insulator phase. However, departure from commensurate fillings yield the exotic supersolid phase where both the crystalline and the superfluid orders coexist. In addition, we obtain signatures for solitary waves and also superfluidity.Comment: 7 pages, 11 figure

Occurence of hammer oyster, Malleus albus near Nachikuppam, Chennai

The hammer oyster, Malleus albus is placed under Class Bivalvia, Subclass Pteriomorphia, Order Pterioida, Superfamily Pteriacea, Family Malleidae. The oyster is locally called suti ali. These oysters (Fig. 1 a and b) were caught by fishermen from Nachikuppam, 1-2 km off Chennai using Nakkuvalai, a bottom set gillnet, at a depth of 5-7 fathoms. The maximum and minimum shell length was 156 mm and 77 mm and the average length and weight were 117 mm and 29 g respectively

Rising trends of caesarean section: a retrospective study

Background: The indications of Caesarean Section (CS) have been changing over time, along with a visible, much talked about rise in the rate. Without a doubt, C-sections can effectively prevent maternal and perinatal mortality when done for a medical indication. However, little is researched about the extent of maternal indications and the fetal outcomes of C-sections.Methods: Data of January to March 2012 and January to March 2017 was obtained by detailed study of the patient files from the Medical Records Department of the hospital. A predesigned proforma was used to record the relevant information. Data was analysed using standard statistical methods.Results: Cephalo pelvic disproportion (CPD) and fetal distress (FD) remained the major causes of CS in both the groups, being 50.4% in group2012 and 60.5% in group2017. Trends of CS due to maternal demand and tubal ligations are emerging. Though the rise in CS was not significant in the 5 year period having gone up from 45.41% to 48.81%, there was significant increase in deliveries without complications, having jumped up from 74.8% to 88.3%.Conclusions: As per the study, there was non-significant rise in the incidence of C-sections in the time period of study. Major contributory factors observed were CPD and FD, in which it is imperative to perform C-sections

Enabling Context-Based Learning with KPortal Webspace Technology

Recognizing the importance of context-based learning and the general lack of technology applications in the design and development of the ideal and formal curricula, this paper describes an experimental system at a large public university. The authors describe the creation of a contextual environment for introducing concepts related to information security to undergraduate business students using the KPortal (Knowledge Portals) webspace technology that supports dynamic content gathered from various sources automatically. The KPortal webspace rated highly on the various attributes of effective contexts and the characteristics of technologies that enable context-based learning. The flexibility provided by the webspace permitted the authors to develop adaptable environments in which the students could connect well with rather abstract concepts. The overall intervention was designed to examine if a limited portion of the course could be supported by technology and next phases of the research will broaden its use to semester-length curriculum