Evaluation of maxillary sinus dimensions in gender determination using helical CT scanning

Gender determination is an important step in identification in forensic medicine. CT measurements of maxillary sinuses may be useful to support gender identification. This study was undertaken to study the accuracy and reliability of maxillary sinus dimensions measurement in gender classification through the use of reconstructed helical CT images. Eighty-eight patients (43 men and 45 women) with age range from 20 to 49 years were selected in this study. The width, length, and height of the maxillary sinuses in addition to the total distance across both sinuses were measured. Data were subjected to discriminant analysis for gender using multiple regression analysis. Maxillary sinus height was the best discriminant parameter that could be used to study sexual dimorphism with an overall accuracy of 71.6%. Using multivariate analysis, 74.4% of male sinuses and 73.3% of female sinuses were sexed correctly. The overall percentage for sexing maxillary sinuses correctly was 73.9%. It can be concluded that reconstructed CT image can provide valuable measurements for maxillary sinuses and could be used for sexing when other methods of sexing are not conclusive.     

Patella sex determination by 3D statistical shape models and nonlinear classifiers

Sex determination is one of the essential steps in personal identification of an individual from skeletal remains. Most elements of the skeleton have been subjected to discriminant function analysis for sex estimation, but little work has been done in terms of the patella. This paper proposes a new sex determination method from the patella using a novel automated feature extraction technique. A dataset of 228 patellae (95 females and 133 males) was amassed from the William M. Bass Donated Skeletal Collection from the University of Tennessee and was subjected to noninvasive high resolution computed tomography (CT). After the CT data were segmented, a set of features was automatically extracted, normalized, and ranked. The segmentation process with surface smoothing minimizes the noise from enthesophytes and ultimately allows our methods to distinguish variations in patellar morphology. These features include geometric features, moments, principal axes, and principal components. A feature vector of dimension 45 for each subject was then constructed. A set of statistical and supervised neural network classification methods were used to classify the sex of the patellar feature vectors. Nonlinear classifiers such as neural networks have been used in previous research to analyze several medical diagnosis problems, including quantitative tissue characterization and automated chromosome classification. In this paper, different classification methods were compared. Classification success ranged from 83.77% average classification rate using labels from a Fuzzy C-Means (FCM) clustering step, to 90.3% for linear discriminant classification (LDC). We obtained results of 96.02% and 93.51% training and testing classification rates, respectively, using feed-forward backpropagation neural networks (NN). These promising results using newly developed features and the application of nonlinear classifiers encourage the usage of these methods in forensic anthropology for identifying the sex of an individual from incomplete skeletons retaining at least one patella.     

The university technology transfer revolution in Saudi Arabia

This paper explains why and how a technology transfer revolution is taking place in Saudi Arabia to meet the mandate that Saudi Arabia become globally competitive as a knowledge-based innovative economy. The paper explains and identifies the new policies and institutions that have been introduced and developed to facilitate technology transfer and knowledge spillovers from the universities for commercialization and ultimately innovative activity and economic growth. The paper finds that a technology transfer revolution in Saudi Arabia is taking place, with the goal of leapfrogging from the factor-based stage of economic development to the innovation-based stage of economic development, while bypassing the intermediary efficiency-based stage of economic development.     

Efficacy of Think Tanks in Influencing Public Policies: The Case of Bangladesh

Abstract

This article analyzes contextual and organizational challenges and constraints faced by think tanks in Bangladesh. It argues that while think tanks have been visible in the policy discourse through fostering policy debates and advocating policy proposals, their direct impact on policy outcomes remains limited. Think tanks’ research findings are often interpreted through the prism of politics. A number of think tanks are institutionally weak and face challenges in funding, attracting researchers, and retaining research focus. Think tanks can potentially focus attention to the wider policy community, and emphasize intermediate influences, such as, building capacity, wider networking and interacting with a broader base of policy-makers, in order to be effective and relevant in the policy discussions.     

Evaluation of Skin Surface as an Alternative Source of Reference DNA Samples: A Pilot Study

An acceptable area for collecting DNA reference sample is a part of the forensic DNA analysis development. The aim of this study was to evaluate skin surface cells (SSC) as an alternate source of reference DNA sample. From each volunteer (n = 10), six samples from skin surface areas (forearm and fingertips) and two traditional samples (blood and buccal cells) were collected. Genomic DNA was extracted and quantified then genotyped using standard techniques. The highest DNA concentration of SSC samples was collected using the tape/forearm method of collection (2.1 ng/μL). Cotton swabs moistened with ethanol yielded higher quantities of DNA than swabs moistened with salicylic acid, and it gave the highest percentage of full STR profiles (97%). This study supports the use of SSC as a noninvasive sampling technique and as a extremely useful source of DNA reference samples among certain cultures where the use of buccal swabs can be considered socially unacceptable.     

PROSPECTS FOR PEACE IN AFGHANISTAN

The author identifies three key factors: the resurgence of the Taliban, the leadership of President Karzai and the regional context. The war in Iraq was a costly distraction and it was a mistake to focus nation-building on elections rather than on the strengthening of proper institutions. Economic development, especially agriculture, has not received sufficient attention, with the result that drug production has increased. But there is an increasing recognition that there needs to be some form of conversation with the Taliban. They are now a more sophisticated military organisation, but still an extremely unsophisticated social and political entity. They do not have the answers to Afghanistan's problems. There are many other groups with a stake in the future of the country so any comprehensive negotiation will be very complicated. But it is a positive element that Afghanistan is a tribal society with an enormous capacity for forgiveness.     

Achieving zero hunger: implementing a human rights approach to food security in Ethiopia

A human rights approach to food security seeks to empower vulnerable groups to claim their rights. It also reinforces a government’s obligations to respect, protect and fulfil the right to food. Furthermore, it encourages the integration of the right to food into the design and implementation of food security policies. This article examines the human rights approach to food security, with specific reference to Ethiopia. It assesses the historical causes of Ethiopia’s food insecurity, and examines the legislative and policy measures that the country has adopted over the last three decades in order to achieve food security. Food insecurity in the country is largely explained by the absence of government accountability. In 1973 and 1984, the hunger caused by drought was transitioned to famine not because of overall unavailability of food in the country, but because the government failed to provide food aid to the starved people and concealed the occurrence of famines from the international donors. Despite designing some food security policies over the last three decades, the country has not yet adopted sufficient legislative and judicial measures to enforce the right to food. This article argues that Ethiopia should introduce a framework law on the right to food to end hunger in the context of achieving national food security.     

In comparison: a study of the competence of nurses and physicians in primary care practice

This study reports the competence of nurses and physicians in primary care setting. Analysis of their diagnostic and treatment practice revealed significant agreement with a consultant family physician's and a general practitioner's (GP) prescribing and treatment status. The consultant's opinion was used as a golden reference. Analyzing the data using KAPPA Statistic (K), indicated the presence of an excellent reproducibility for one nurse and good reproducibility for the other nurses. After analyzing the data according to disease category, none of the nurses were found to miss any life threatening conditions. Most of the disagreements with the GP and the consultant in diagnosis and treatment were in mild health problems. Nurse practitioners (NP) are competent to practice in refugee camps without risking patients' lives. These findings are similar to other studies and suggest that letting NP's participate actively in patient management may be an enabling factor that supports their practice in medically under-served locations.     

Managerial Innovations in the Egyptian Public Health Sector: An Empirical Investigation

The purpose of this article is to analyze the process of restructuring the Egyptian public health sector according to the new mode of governance principles and the concomitant dilemmas in the process. Based on an interpretative methodology, the findings of this research indicate that (a) despite some positive changes, serious doubts remain over the commercialization of basic public services; (b) confusions have emerged regarding the identity of public hospitals; (c) despite the introduction of the business management principles, the centralized hierarchical power of the state over the local governmental hospitals remains intact; (d) the new system has degraded the professional standards of medical practitioners and made them subservient to the whims of the financial management professionals; and (e) there have been some negative effects on equity.