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Search Results: 1 - 10 of 3216 matches for " Dina; Paiva "
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Workplace Identities of Women in the US Labor Market  [PDF]
Dina Banerjee
Sociology Mind (SM) , 2013, DOI: 10.4236/sm.2013.31004

In this paper, I examine the effects of gender and race/ethnicity on American workers’ workplace identities. Literature on gender, work, and occupation suggests that gender and race are significant predictors of workers’ workplace identities. Literature also posits that self-perceived competency and reflected appraisals from others in workplaces also contribute considerably to workers’ workplace identities. However, there exists hardly any empirical study that explores the impacts of gender, race, workers’ self-perceived competency, and their reflected appraisals altogether on their workplace identities. That is what I accomplished in this study. Deriving the data from the National Study of Changing Workforce (NSCW: 2008) I ask: 1) Do women and men workers in America differ in their perceptions of workplace identities; 2) Do non-white and white workers in America differ in their perceptions of workplace identities; and 3) Do gender and race of the workers impact their workplace identities when self-perceived competency and reflected appraisals enter the equation? Analyses are based on quantitative methods. Results show that workers’ self-perceived competency and their reflected appraisals are more significant predictors of their workplace identities than gender or race.


The Link between Teaching Methods and Achievement in Math in Computer-Assisted Elementary Schools  [PDF]
Dina Hassidov
Creative Education (CE) , 2017, DOI: 10.4236/ce.2017.814157
Abstract: This study compares the effect of frontal teaching methods on achievement levels in math to those of alternative teaching methods in elementary schools where classroom teaching is reinforced with computer sessions. The study was conducted in two urban, elementary schools in underprivileged areas and involved 479 students in grades 4, 5 and 6 and 18 teachers 9 who used the frontal method and 9 who used the alternative method. Progress was checked while accounting for students’ age and level. Significant differences between the two methods were found: Students in the alternative method progressed more during the year than those in the frontal method. Furthermore, the lead of alternative students mostly increased with age and grade level, while most frontal students remained at their level. District tests conducted two years after data collection for the study further corroborated the study findings. The results indicate that the teaching method is a decisive factor in student achievement in math and that full coordination of classroom teaching with computer practice is of prime importance. This requires a change from the traditional teaching methods, incorporating attention to the differing needs and achievements of students.
Uso de servi?os odontológicos por pacientes com síndrome de Down
Oliveira,Ana Cristina; Czeresnia,Dina; Paiva,Saul Martins; Campos,M?nica Rodrigues; Ferreira,Efigênia Ferreira;
Revista de Saúde Pública , 2008, DOI: 10.1590/S0034-89102008000400016
Abstract: objective: from a perspective of comprehensive care, the purpose of the study was to evaluate factors associated to dental care provided to down syndrome children and adolescents. methods: a cross-sectional study was carried out including 112 pairs of mothers/down syndrome children aged between 3 and 18 years who attended a public hospital genetics clinic in rio de janeiro, southeastern brazil, in 2006. dental care was not provided at the clinic. data were collected through a questionnaire administered to the mothers and oral examinations of their children. multiple logistic regression was used for data analysis. the dependent variable was "dental care of the down syndrome child or adolescent" and the independent variables included demographic, socioeconomic and behavioral characteristics. results: most children (79.5%) had had at least one dental visit (90% ci: 72.3; 87.8). dental experience of the children was associated to the following variables: mothers who reported being advised by their children's health provider to take them to the dentist's (or=6.1 [2.5; 15.1]); children with prior history of surgery (or=2.5 [0.9; 7.1]); and age between 12 and 18 years (or=13.1 [2.0; 86.9]). conclusions: dental care provided to down syndrome children and adolescents was associated to advice given by their health providers, a part of comprehensive care.
Workplace Control: Women and Minority Workers in America  [PDF]
Dina Banerjee, Ying Yang
Sociology Mind (SM) , 2013, DOI: 10.4236/sm.2013.33028

In this paper, we examine the effects of gender and race on American workers’ workplace control. Scholarship on gender, work, and occupation states that gender and race are important predictors of the extent of control workers exercise in workplaces. Literature also posits that job satisfaction and work-family conflict also contribute substantially to workers’ workplace control. However, there exists hardly any empirical study that explores the impacts of gender, race, job satisfaction and work-family conflict altogether on their workplace control. That is what we accomplished in this study. Obtaining data from the 2008 National Study of Changing Workforce (NSCW), we ask: 1) Do women and men workers in America differ in their perceptions of workplace control? 2) Do non-white and white workers in America differ in their perceptions of workplace control? And 3) Do gender and race of the workers influence their workplace control when job satisfaction and work-family conflict are considered? Analyses are based on quantitative methods. Results show that women perceive to have less control over their workplace as compared to men. Moreover, job satisfaction is a more significant predictor of their workplace control than work-family spillover.

Modeling Exchange Rate Dynamics in Egypt: Observed and Unobserved Volatility  [PDF]
Dina Rofael, Rana Hosni
Modern Economy (ME) , 2015, DOI: 10.4236/me.2015.61006
Abstract: The underlying study focuses on estimating and forecasting the volatility of exchange rate in Egypt based on ARCH type models and the State Space (SS) models, namely; the Stochastic Volatility (SV) and the Time-Varying Parameter (TVP) models. Moreover, the paper tests the predictive power of the conducted models to come up with a powerful technique that gives the best forward-looking stance of the exchange rate. Empirically, the paper utilizes daily exchange rate data spanning from January 2003 till June 2013. Evidently, it is found that the exchange rate returns in Egypt suffer from the volatility clustering phenomenon and that there exists a time-varying variance in the exchange rate series that has to be appropriately dealt with, while modelling nominal exchange rates. Additionally, with regard to the link between the volatility occurring in the stock market in Egypt and the volatility of the exchange rate market, it is found that there is a risk mismatch between the two markets. Therefore, further research is recommended in the future to suggest other exogenous variables that can help in explaining the volatility in the exchange rate returns in Egypt.
The Constructionist Learning Approach in the Digital Age  [PDF]
Ilya Levin, Dina Tsybulsky
Creative Education (CE) , 2017, DOI: 10.4236/ce.2017.815169
Abstract: The article deals with the evolution of the constructionist learning approach from the beginning of the era of information technologies through the digital age. The evolution of constructionism is demonstrated in connection with two associated processes: changes in the human worldview related to the digital shift, and the corresponding transformations in human society. The study examines the evolution of basic constructionist ideas: 1) “microworlds” as “incubators of knowledge”; 2) a child as “the architect of his [or her] intelligent structures”; 3) the computer as “a machine that brings back a natural character to learning”; 4) coding as a “universal learning activity” that enables the study of fundamental scientific ideas. The constructionist ideas are analyzed in the context of today’s digital reality. The main contribution of the study is formulating the changes in classical constructionism as transformations that correspond to worldview components: activating the perception of self; democratization of the mutual interactions with others; virtualization of the conception of reality; integration the subject and object in their interaction with reality.
A Unique Program (“Senso-Math”) for Teaching Mathematics in Preschool: Evaluating Facilitator Training  [PDF]
Dina Hassidov, Bat Sheva Ilany
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.511112
Abstract: This study followed a five-year program, entitled “Senso-Math”, whose goal was to train facilitators involved in the promotion of early childhood mathematical knowledge in preschool—an important goal in preschool education today—following which the trained facilitators taught mathematics in preschool alongside the regular preschool teachers. During the program, 500 facilitators activated 10,000 three-to-six-year-old children. The program included various demographic sectors. This study examines both the program’s contribution to the professional development of the mathematical education facilitators, and the facilitators’ attitudes to mathematical education in the preschool. While the results indicated that, overall, the program contributed positively to the facilitators’ professional development and showed a positive trend in the participants’ attitude regarding mathematics education in the preschool, the findings also revealed differences among the various demographic sectors studied (Jewish Orthodox, Jewish immigrants from the Caucasus, and Druze).
The muscle – fat duel or why obese children are taller?
Dina Ralt
BMC Pediatrics , 2006, DOI: 10.1186/1471-2431-6-33
Abstract: The interplay between less muscle and more fat tissue is discussed from physiological perspectives with an emphasis on the early years of childhood.It is suggested that the coordinated muscle-fat interactions lead to a fluctuating exchange economy rate. This bodily economic decision, slides between thrift (more fat) and prodigal (more muscle) strategies. The thrift strategy results not only in obesity and less physical activity but also in other maladies which the body is unable to manage.What leads to obesity (less muscle, more fat) might be very difficult to reverse at adulthood, prevention at childhood is thus recommended.Early recognition of the ailment (low muscle mass) is crucial. Based on studies demonstrating a 'rivalry' between muscle build-up and height growth at childhood, it is postulated that among the both taller and more obese children the percentage of children with lower muscle mass will be higher.A special, body/muscle-building gymnastics program for children is suggested as a potential early intervention to prevent the ill progress of obesity.The Health Survey for England warns that by 2010, if nothing is done, 19% of boys and 22% of girls aged two to 15 will be obese [1]. Larger body size is not the main problem of obesity [2], the problems are the numerous accompanying maladies [3-5].The spreading of the obesity epidemic, termed Globesity [6,7], is pointing to a very distressing situation – obesity not only seems irreversible but its incidence continues to rise. Though adenovirus showed association with obesity [8] more basic interactions point to a non-viral physiological complexity of gaining weight. The increased calorie intake and decreased physical activity, allied with obesity, appear to be the result of a bodily economic strategy rather than just the result of behavioral aberration [9].What is the nature of this physiological strategy (i.e. exchange economy rates)? It has many attributes but this commentary will focus on the interplay bet
Intercellular communication, NO and the biology of Chinese medicine
Dina Ralt
Cell Communication and Signaling , 2005, DOI: 10.1186/1478-811x-3-8
Abstract: The hypothesis presented here suggests a novel integrative view that combines Western biochemistry with the Chinese medicinal concept of qi.The core for this hypothesis is that transmission of qi along the meridians is based on informational molecules that travel via an intercellular communication system. Acupuncture at specific points enhances the flow of the signaling molecules through this communication system.Nitric oxide is suggested as a prime candidate for such a signaling molecule in the meridian system. The biochemistry of nitric oxide can shed light on the biology underlying Chinese medicine while Chinese medicinal data can provide a clue to the sought after framework for nitric oxide.Recently there has been a great fervor in the health field around the inclusions of non-traditional disciplines [1]. For example, eastern medicines, naturopathy and healing have become popular and were recently introduced into medical school curricula. These changes have made Chinese medicine [2,3] attainable in the west just as Western medicine is to the east. However, open-mindedness [4,5] or legality [6,7] does not necessarily imply true integration between the medicinal approaches.The aim of this article is to suggest a novel integrative view of the key concept in Chinese medicine, qi, meridians and acupuncture, with Western biochemistry. The crux of the hypothesis is that the transmission of qi along the meridians, involves informational molecules, which travel via an intercellular communication system, and, acupuncture at specific points enhances this communication system.Nitric oxide (NO) is proposed here as a prime candidate for such a signaling molecule in the meridian system.One analogy that can be made is to consider the word HELLO as an example to the signaling molecule. The information that HELLO transfers is not only the meaning of the word, which is HI, but mainly the way by which it is expressed e.g., loud, smiling, sad, laughing. If we think of NO in the cont
Paget's disease of the breast in a male with lymphomatoid papulosis: a case report
Dina Fouad
Journal of Medical Case Reports , 2011, DOI: 10.1186/1752-1947-5-43
Abstract: We present the case of a 67-year-old Caucasian man with lymphomatoid papulosis who was diagnosed with Paget's disease of the nipple and who was treated successfully with surgery alone. We discuss the presentation, investigations, management and pathogenesis of Paget's disease of the nipple.The case highlights the need to be vigilant when new skin lesions arise in the context of an underlying chronic skin disorder.Paget's disease is an eczematous skin change of the nipple that is usually associated with an underlying breast malignancy [1]. It may present with erythema, scaling, ulceration, bleeding or a painful nipple [2,3]. Male breast cancer accounts for less than 1% of all breast cancer with Paget's disease remaining very rare. Paget's disease of the nipple may be associated with an underlying invasive cancer, a non-invasive cancer ductal carcinoma in situ or no underlying cancer. Prognosis is dependent upon the status of invasion and treatment is tailored accordingly. Approximately 90% of patients presenting with a palpable mass or who have a visible mass on mammography will have underlying invasive disease. Notably, invasive cancer can occur with Paget's disease in 38% of patients with no underlying mass [3,4].The patient is a 67-year-old Caucasian man who presented to the Breast Clinic in August 2008 with a six-month history of a painful right nipple and one episode of clear nipple discharge. His problem had not resolved with use of a topical ointment prescribed by his general practitioner and he was admitted to the Breast ward of our hospital in September 2008 for further investigations.The patient's past medical history includes 30 years of lymphomatoid papulosis, a chronic papulonodular dermatological condition, which has been controlled with long-term methotrexate treatment and folic acid supplementation. There was no report that the control of this had been particularly poor recently, however the patient had several previous recorded flare ups (1992, 2000,
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