Book review: Sexuality and social justice in Africa: rethinking homophobia and forging resistance

"Sexuality and Social Justice in Africa: Rethinking Homophobia and Forging Resistance." Marc Epprecht. Zed Books. July 2013. --- The persecution of people in Africa on the basis of their homosexual orientation has recently received considerable coverage in the media. However, much of the analysis thus far has been highly critical of African leadership and culture without considering local nuances, historical factors and external influences that are contributing to the problem. In this book, based on pioneering research on the history of homosexualities and engagement with current LGBTI activism, Marc Epprecht aims to provide a sympathetic overview of the issues at play. Clearly written and richly annotated, the book will prove to be a useful guide for academics, social workers, and activists, writes Jia Hui Lee

Book review: The upright thinkers: the human journey from living in trees to understanding the cosmos by Leonard Mlodinow

The Upright Thinkers: The Human Journey from Living in Trees to Understanding the Cosmos is an accessible grand history of science and many of its most crucial figures, enlivened by personal anecdotes and insights by physicist Leonard Mlodinow. Mlodinow evocatively demonstrates how scientific developments are not solely the product of isolated genius, but are dependent upon the convergence of systems, technologies and happenstance. Although he suggests that a more critical reflection on the parameters of ‘science’ could have been offered, Jia Hui Lee argues that The Upright Thinkers is a witty and thought-provoking account of the history of scientific discovery

A Four-Stage Data Augmentation Approach to ResNet-Conformer Based Acoustic Modeling for Sound Event Localization and Detection

In this paper, we propose a novel four-stage data augmentation approach to ResNet-Conformer based acoustic modeling for sound event localization and detection (SELD). First, we explore two spatial augmentation techniques, namely audio channel swapping (ACS) and multi-channel simulation (MCS), to deal with data sparsity in SELD. ACS and MDS focus on augmenting the limited training data with expanding direction of arrival (DOA) representations such that the acoustic models trained with the augmented data are robust to localization variations of acoustic sources. Next, time-domain mixing (TDM) and time-frequency masking (TFM) are also investigated to deal with overlapping sound events and data diversity. Finally, ACS, MCS, TDM and TFM are combined in a step-by-step manner to form an effective four-stage data augmentation scheme. Tested on the Detection and Classification of Acoustic Scenes and Events (DCASE) 2020 data sets, our proposed augmentation approach greatly improves the system performance, ranking our submitted system in the first place in the SELD task of DCASE 2020 Challenge. Furthermore, we employ a ResNet-Conformer architecture to model both global and local context dependencies of an audio sequence to yield further gains over those architectures used in the DCASE 2020 SELD evaluations.Comment: 12 pages, 8 figure

Evaluation on the Preference of Coffee Shop among the Undergraduate Students with Analytic Hierarchy Process Model

Emergence of coffee shop in recent years has proven the demand of coffee shop in modern lifestyle. Nowadays, visitation to coffee shop has become a common trend for most of the undergraduate students for group discussion or chatting. This study aims to evaluate the preference of undergraduate students from Universiti Tunku Abdul Rahman in selecting the coffee shop based on multiple criteria. There are 19 respondents participating in this study who have visited all the 4 selected coffee shops which are Simple Coffee, Bean Caf, Starbucks and Old Town White Coffee. An Analytic Hierarchy Process (AHP) model is proposed to determine the weight of criteria, priority of coffee shop selection in terms of each criterion and the overall performance of the coffee shop. The findings show that the most important criterion is cleanliness, followed by flavor, store atmosphere, sales promotion, speed of service, price and location. Starbucks is the most preferred coffee shop while the followings are Simple Coffee, Bean Caf and Old Town White Coffee. The significance of this study is to propose a conceptual framework to identify the most preferred coffee shop and the most important criteria in coffee shop selection among the undergraduate students by using AHP model

Joint QoS multicast routing and channel assignment in multiradio multichannel wireless mesh networks using intelligent computational methods

Copyright @ 2010 Elsevier B.V. All rights reserved.In this paper, the quality of service multicast routing and channel assignment (QoS-MRCA) problem is investigated. It is proved to be a NP-hard problem. Previous work separates the multicast tree construction from the channel assignment. Therefore they bear severe drawback, that is, channel assignment cannot work well with the determined multicast tree. In this paper, we integrate them together and solve it by intelligent computational methods. First, we develop a unified framework which consists of the problem formulation, the solution representation, the fitness function, and the channel assignment algorithm. Then, we propose three separate algorithms based on three representative intelligent computational methods (i.e., genetic algorithm, simulated annealing, and tabu search). These three algorithms aim to search minimum-interference multicast trees which also satisfy the end-to-end delay constraint and optimize the usage of the scarce radio network resource in wireless mesh networks. To achieve this goal, the optimization techniques based on state of the art genetic algorithm and the techniques to control the annealing process and the tabu search procedure are well developed separately. Simulation results show that the proposed three intelligent computational methods based multicast algorithms all achieve better performance in terms of both the total channel conflict and the tree cost than those comparative references.This work was supported by the Engineering and Physical Sciences Research Council (EPSRC) of UK under Grant EP/E060722/1

QoS multicast tree construction in IP/DWDM optical internet by bio-inspired algorithms

Copyright @ Elsevier Ltd. All rights reserved.In this paper, two bio-inspired Quality of Service (QoS) multicast algorithms are proposed in IP over dense wavelength division multiplexing (DWDM) optical Internet. Given a QoS multicast request and the delay interval required by the application, both algorithms are able to find a flexible QoS-based cost suboptimal routing tree. They first construct the multicast trees based on ant colony optimization and artificial immune algorithm, respectively. Then a dedicated wavelength assignment algorithm is proposed to assign wavelengths to the trees aiming to minimize the delay of the wavelength conversion. In both algorithms, multicast routing and wavelength assignment are integrated into a single process. Therefore, they can find the multicast trees on which the least wavelength conversion delay is achieved. Load balance is also considered in both algorithms. Simulation results show that these two bio-inspired algorithms can construct high performance QoS routing trees for multicast applications in IP/DWDM optical Internet.This work was supported in part ny the Program for New Century Excellent Talents in University, the Engineering and Physical Sciences Research Council (EPSRC) of UK under Grant EP/E060722/1, the National Natural Science Foundation of China under Grant no. 60673159 and 70671020, the National High-Tech Reasearch and Development Plan of China under Grant no. 2007AA041201, and the Specialized Research Fund for the Doctoral Program of Higher Education under Grant no. 20070145017

Electroencephalography and transcranial Doppler ultrasonography in neonatal citrullinemia

The authors present a case of citrullinemia with a genotype of argininosuccinate synthetase (ASS1), c.380 G>A (p.R127Q)/c.380 G>A (p.R127Q), in two alleles. A 3-day-old female infant presented with status epilepticus and coma. Laboratory data showed hyperammonemia and marked lactic acidosis in the blood and cerebrospinal fluid; electroencephalography showed severely suppressed cerebral activity and focal paroxysmal volleys of slow and sharp waves (< 1Hz) over the left hemisphere. Real-time transcranial Doppler ultrasonography showed a brain edema and high peaked systolic and low diastolic flows in basal, anterior, and middle cerebral arteries; however, immediately after a blood exchange transfusion, systolic flows were lower and diastolic flows were higher. The resistance indices were significantly different (means: 0.58 vs. 0.37; p=0.01). The patient was placed on diet therapy. After six blood exchange transfusions and peritoneal dialysis, her neurologic examination results and serum ammonia and lactate values were normal. The authors found that electroencephalography and transcranial Doppler ultrasonography were useful for the diagnosis and follow-up treatment of neonatal citrullinemia