Biomechanical analysis of loading/unloading a ladder on a truck

Loading/unloading a ladder on vehicles are frequent tasks and involve overhead handling that may expose workers to risk factors of shoulder musculoskeletal disorders. The objective of the present study was to evaluate posture, forces required and perceived exertion when loading and unloading the ladder on a utility truck. Thirteen male overhead line workers from an electric utility in Brazil participated in this study. Shoulder elevation angle was measured using inclinometers. The required force to load/unload the ladder was measured by dynamometer. Subjective assessment of the perceived exertion was recorded to compare the exertion reported during the test conditions to the field conditions. The task of loading/unloading the ladder presented risks of shoulder musculoskeletal disorders (MSDs) to workers because it requires high levels of force (approximately 60% of the maximal force) combined with overhead posture of the shoulders (more than 100° from the neutral posture). Age and height presented to interfere in biomechanical risks presented in load/unload task. There was no significant difference between the subjective exertion during the test conditions and handling the ladder in the field. Ergonomic intervention is recommended to reduce these risks for shoulder MSDs.     

Quantification of hand grasp force using a pressure mapping system

The goal of this study was to use a pressure sensor to measure the force distribution and contact area of the hand when gripping, pushing, and pulling a cylinder. Data was collected from 10 subjects with no hand impairments and from 1 subject with rheumatoid arthritis (RA). Subjects grasped an aluminum cylinder wrapped with a Tekscan pressure sensor and performed each trial at 25%, 50%, and 100% maximum voluntary exertion. A relationship was found between increasing exertion and increasing hand area with increasing hand contact area. The force distribution maps showed the thenar region of the hand exerts the most force during pushing while the metacarpal joint line exerts the highest force during pulling. The third and fourth phalange were found to exert the highest phalange force during gripping. The force distribution maps from the RA subject showed higher thumb forces and distal phalange forces, relative to the entire phalange, compared to the non-impaired subjects. This suggests that the RA subject compensates for the lack of phalange function with the regions of the hand that still function. Future studies should sample individuals with a larger hand area range and sample more individuals with RA.     

Accelerometry analysis of physical activity and sedentary behavior in older adults: a systematic review and data analysis

Accelerometers objectively monitor physical activity and sedentary patterns and are increasingly used in the research setting. It is important to maintain consistency in data analysis and reporting, therefore, we: (1) systematically identified studies using accelerometry (ActiGraph, Pensacola, FL, USA) to measure moderate-to-vigorous physical activity (MVPA) and sedentary time in older adults, and (2) based on the review findings, we used different cut-points obtained to analyze accelerometry data from a sample of community-dwelling older women. We identified 59 articles with cut-points ranging between 574 and 3,250 counts/min for MVPA and 50 and 500 counts/min for sedentary time. Using these cut-points and data from women (mean age, 70 years), the median MVPA minutes per day ranged between 4 and 80 min while percentage of sedentary time per day ranged between 62 % and 86 %. These data highlight (1) the importance of reporting detailed information on the analysis assumptions and (2) that results can differ greatly depending on analysis parameters.     

Static load in the nursing profession; the silent killer?

Traditionally back pain in the nursing profession is associated with heavy lifting of patients. Although there is a strong relationship between heavy loads on the spine and lifting patients, literature indicates that there is a major factor that should not be underestimated: static load. Static load can be defined as the result of static, not moving, not dynamic, working positions. For example when a caregiver is washing a patient on a bed which is too low, her back is in a static (bended) stooped position up to several minutes. Exposure to static load is an underestimated silent killer of nurses musculoskeletal system . There is evidence from this cross-sectional study that static load can be reduced by a combination of introducing the right equipment, creating awareness and education.     

Specificity of back muscle response to submaximal fatiguing contractions

A fatigue-related decrease in quality and accuracy of the proprioceptive feedback from muscle spindles in the back (e.g. stretch reflexes) may lead to a deterioration of spinal stability, thereby making the spine more vulnerable to external perturbations. Endurance time, tissue oxygenation, reflex latency and blood pressure response were studied in twenty subjects during a submaximal endurance test of the back extensors (20 % MVC) performed as either a position task (supporting a weight stack while maintaining trunk position) or a force task (exerting a force against a dynamometer). Mean endurance time was 8.91 (± 2.79) min for the force task and 10.86 (± 6.93) min for the position task. This result is in striking contrast to what has previously been reported from limb muscles, and suggests that back muscles are especially well suited for postural tasks. An increased reflex latency found after the position task indicates that the disadvantage of the prolonged endurance time is a deterioration of the afferent input from the muscle spindles that may potentially hamper the protection of the spine.     

Grounded theory research: Procedures,canons, and evaluative criteria

Using grounded theory as an example, this paper examines three methodological questions that are generally applicable to all qualitative methods. How should the usual scientific canons be reinterpreted for qualitative research? How should researchers report the procedures and canons used in their research? What evaluative criteria should be used in judging the research products? We propose that the criteria should be adapted to fit the procedures of the method. We demonstrate how this can be done for grounded theory and suggest criteria for evaluating studies following this approach. We argue that other qualitative researchers might be similarly specific about their procedures and evaluative criteria.     

Defining Social Inclusion for Children with Disabilities: A Critical Literature Review

Social inclusion is a complex and often misunderstood concept. For children with disabilities, research has documented the degree of loneliness, bullying and exclusion they often experience in their social lives. This paper presents the findings of a critical literature review on the social inclusion of children with disabilities. Study methods comprised rigorous criteria for study selection followed by established protocols for evaluating studies. Reputable rating scales were used to examine peer‐reviewed research published within the last 10 years. Fifty‐four studies were analyzed for essential themes. Findings reflect a broad range of stakeholder perspectives and factors that promote or inhibit social inclusion, including child‐specific variables as well as environmental influences. Additional research should focus on the perspectives and experiences of children in inclusive settings, particularly those with disabilities, as a means of safeguarding their future social and emotional well‐being.     

Richness orderings

An index of richness in a society is a measure of the extent of its affluence. This paper presents an analytical discussion on several indices of richness and their properties. It also develops criteria for ordering alternative distributions of income in terms of their richness. Given a line of richness, an income level above which a person is regarded as rich, and depending on the redistributive principle, it is shown that the ranking relation can be implemented by seeking dominance with respect to the generalized Lorenz curve of the rich or the affluence profile of the society. When the line of richness is assumed to be variable, we need to employ the stochastic dominance conditions for ordering the income distributions.     

Seasonalities in Eastern Foreign Exchange Markets: A Barrier to Euro Adoption?

Plans for an early adoption of the euro by some new EU members hang on political will and a set of nominal criteria. The focus, however, should be on the available adjustment mechanisms supporting a permanently fixed exchange rate. Efficient financial markets could provide stabilisation (following a shock), substituting the weakened array of traditional policy instruments. In order to assess the availability of such alternative, this paper presents a particular empirical analysis of efficiency in the foreign exchange markets of three recently acceded countries. The results suggest that some caution is needed in the transition towards full monetary integration, as the level of financial efficiency already attained may be insufficient to ensure an adequate source of stabilisation in economies affected by specific disturbances.      

Common criteria for usability review

The propose of this paper is to present a literature review, in a grouping of common criteria for usability approaches of Bastien and Scapin (1993), Nielsen (1994), Shnneiderman(1998), Dix et al (1998), Preece et al (2005) and ISO 9241-110 (2006). After establishment of prerequisites for knowledge of the general characteristics of the users who will use the system, are defined and explained the criteria in common: consistency, user control, ease of learning, flexibility, errors management, reduction of excess and visibility system status. Although there is no determination as to which criteria should be considered when developing an interface and each author presents some specificity in their approach, it is observed that there is equivalence in the measures adopted usability.     

Historicizing diaglossia

Auer (2005, 2011) presents a typology of present‐day dialect/standard constellations in Europe, thereby reintroducing the concept of diaglossia, which refers to a situation with intermediate variants between dialect and standard. Characterizing the sociolinguistic landscape in many languages in Europe today, diaglossia is assumed to be a relatively recent phenomenon dating back to the late nineteenth or early twentieth century, following a previous stage of diglossia. Drawing on a range of case studies of post‐Medieval English, German and Dutch, this article argues that the sociolinguistic situation in the Early and Late Modern period cannot be described in terms of diglossia, and is characterized by a ubiquity of intermediate variants instead, that is, by diaglossia. This means that diaglossia should be extended much farther back in time and is not a recent development following a state of diglossia.     

Poverty, income distribution and CGE micro-simulation modeling: Does the functional form of distribution matter?

This paper explores income distribution modeling approaches for poverty analysis in a CGE micro-simulation context. Income distribution functional forms such as the lognormal, Pareto, beta distribution and empirical methods are currently used in CGE models in parallel with the estimation of FGT poverty indices. The particular methods or functional forms used in this context are not always clearly defined and justified. In this paper, we investigate and provide better criteria for selecting a functional distribution for poverty analysis. To achieve this, we apply parametric estimation to seven functional forms and compare the results to a purely “empirical” method. The results showed that no single form is more appropriate in all instances or for all household subgroups. The choice of a modeling approach should be motivated by a search for best fit and should be based on appropriate statistical tests. Selecting inappropriate distributional forms can lead to biased results in terms of poverty analysis. Introducing functional forms in the empirical approach can also provide greater confidence in the results obtained.

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An erratum to this article can be found at     

The sociological study of stress

This paper presents a critical overview of current concepts and analytic practices in stress research and considers how they can be changed to make the research more consistent with core sociological interests. An overarching concern of the paper is the analytic use of basic information about people's social and institutional affiliations and statuses. It is important that such information be treated not simply as data that need to be controlled statistically; we must examine the bearing of these data on each domain of the stress process: the exposure to and meaning of stressors, access to stress mediators, and the psychological, physical, and behavioral manifestations of stress. The conceptualization and measurement of stressors should move away from their focus on particular events or chronic strains and should seek instead to observe and assess over time constellations of stressors made up of both events and strains. Moreover, the effects of the mediators--coping and social support--are evaluated most fruitfully in terms of their effects in limiting the number, severity, and diffusion of stressors in these constellations. Finally, sociological stress researchers should not be bound to outcomes that better serve the intellectual interests of those who work with biomedical and epidemiological models of stress, nor should the research be committed exclusively to a single outcome.     

Low back pain and lifting: a review of epidemiology and aetiology

The incidence of low back pain has continued to increase in modern society, despite the considerable amount of scientific research that has aimed to isolate its exact aetiology. Although low back pain is still largely idiopathic, research has identified over one hundred risk factors for the condition. Of these risk factors, manual material handling tasks are perhaps the most widely explored within the biomechanical literature, as these tasks have been associated with high mechanical stresses on the lower back. Numerous technique-related variables have been addressed by researchers, whilst the influence of intra-abdominal pressure has also been considered. In addition to this, the implications of variations in the size and structural composition of the load have also been assessed. However, low back pain continues to pose a significant threat to the financial stability and happiness of millions of people worldwide. In addition, a number of functional work capacity assessment tests use lifting as a method for assessment of return to work condition. Many of these tests are not standardised and do not consider the implications of low back loading. Therefore new research attempts in this area are justified and should aim to identify the extent of the association that exists between the known risk factors and the incidence of low back pain.     

Developing the DSM-IV-DSM-IV Criteria to Identify Adolescent Problem Gambling in Non-Clinical Populations

This paper presents a revised version of DSM-IV-J criteria for youth, the DSM-IV-MR-J, together with psychometric data stemming from its use in a major prevalence study of adolescent gambling and problem gambling. The case is made for further development and testing of current and emerging instruments to screen for problem gambling in youth, with the aim of establishing one internationally accepted gold standard measure.     

Listening to Clients

Abstract

Qualitative research can be used to influence policy development, implementation, and evaluation. Three focus group studies dealing with implementation of a county's welfare reform programs are presented to illustrate the ways that qualitative research can be used. The paper discusses results of the studies and presents strategies for exertinginfluence. Processes used to develop and change policy are explicated.     

Public–private partnerships for e-government in developing countries: An early stage assessment framework

Although public–private partnerships (PPP) and electronic government (e-government) have proven to be fruitful mechanisms for economic development and emerging economies seem to recognize their importance, consistent methods for analyzing the early planning stages of e-government portfolios are lacking. The present work utilized a comprehensive literature review to understand the evaluation criteria for PPP projects throughout the early-stage planning process. A qualitative meta-synthesis was employed to identify critical factors for PPP and e-government, with a particular focus on developing countries, PPP, and e-government criteria. Our research presents a framework named “PPP4e-Gov” (public–private partnerships for e-government). The framework compares risk and value factors of e-government PPP projects and adopts a weighted scoring model that estimates the risks that should be considered in a project and how much value a given e-government initiative may generate if the PPP option is chosen. As an illustration of how the framework may be used, the paper interviewed ten practitioners in Costa Rica who tried out PPP4e-Gov and showcased how to plan their e-government initiatives.     

Back pack injuries in Indian school children: risk factors and clinical presentations

The use of backpack increased substantially among the school children. Studies have shown that carrying a backpack cause to develop different symptoms of musculoskeletal disorders among the carrier of the backpack. In India there are fewer studies available in literature which explains the musculoskeletal discomfort among the school children. This study aimed at to find out the prevalence of different musculoskeletal problems among the school children. In a retrospective study data were collected for twenty two students. The main diagnostic criteria were pressure mark (redness or swelling) over neck and shoulder corresponding to the straps of the backpack, stooping posture while carrying the back pack, pain or stiffness in the neck, upper back and shoulders predominantly while carrying the back pack and absence of these symptoms during school holidays. Results revealed that pain in the upper back (40%), neck (27%) and shoulder (20%) were most prevalent body regions followed by forearm and wrist pain (7%) and low back (6%). Results further revealed that all the students participated in this study have a pressure mark over shoulder. 54.55% of the children were diagnosed with myofascial pain and rest with thoracic outlet syndrome.