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Search Results: 1 - 10 of 448142 matches for " K. S.;Ma "
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Singlet fermion dark matter and electroweak baryogenesis with radiative neutrino mass
Babu, K. S.;Ma, Ernest
High Energy Physics - Phenomenology , 2007, DOI: 10.1142/S0217751X08040299
Abstract: The model of radiative neutrino mass with dark matter proposed by one of us is extended to include a real singlet scalar field. There are then two important new consequences. One is the realistic possibility of having the lightest neutral singlet fermion (instead of the lightest neutral component of the dark scalar doublet) as the dark matter of the Universe. The other is a modification of the effective Higgs potential of the Standard Model, consistent with electroweak baryogenesis.
A Multidisciplinary Approach to the Management of Atypical Osseous Epithelioid Hemangioendothelioma
J. K. Ma,J. Barr,S. Vijayakumar
Case Reports in Oncological Medicine , 2014, DOI: 10.1155/2014/917425
Abstract: Hemangioendothelioma is a rare vascular tumor of intermediate malignant potential. Though epithelioid hemangioendothelioma (EH) is commonly found in soft tissues, it has been known to be present in skeletal tissues. The authors present a case of a 50-year-old woman diagnosed with EH of the iliac bone and acetabulum, who experienced pathological fracture at presentation. This report describes a multidisciplinary approach to the management that includes initial incisional biopsy, curettage, and bone grafting, followed by Intensity Modulated Radiation Therapy. The patient finally underwent hemipelvic resection with allograft reconstruction after recurrence. Histopathological study revealed osseous EH of low mitotic activity that stained positively for CD31, CD34, vimentin, and Factor VIII. Herein, the authors discuss the imaging characteristics, histopathological aspects, cytogenetic findings, and the radiobiological behavior of osseous EH. After an aggressive multidisciplinary intervention, the patient is able to achieve local control with no evidence of distal metastatic disease. 1. Introduction Hemangioendothelioma is a rare tumor that exhibits intermediate malignant potential, clinically behaving between benign hemangioma and malignant angiosarcoma. Epithelioid hemangioendothelioma (EH) is the most common histologic subtype that arises from vascular tissue [1] and represents less than one percent of all vascular neoplasms [2]. EH is most commonly found in soft tissues but can also be found in skeletal tissues such as skull, spine, pelvis, femur, and tibia [2]. Primary bone EH accounts for less than one percent of all malignant bone tumors [3]. For certain isolated tumors, curative resection with negative margins can achieve cure and long term local control. Role of chemotherapy and adjuvant radiation therapy remains unclear. Here, we report and discuss the management of epithelioid hemangioendothelioma of the acetabulum and the ilium in the setting of multidisciplinary approach, including orthopedic surgery, radiation oncology, medical oncology, interventional radiology, and pathology. 2. Case Report 2.1. Clinical History 50-year-old African American woman initially presented to the emergency department with a two-week history of vague right hip and lower pelvic pain. Her past medical history was significant for rheumatoid arthritis, diabetes mellitus type 1, and hyperthyroidism status after radioactive iodine ablation. No history of trauma or systemic etiology was found. Physical exam was unremarkable for motor or sensory neurological deficits. No
Molecular Cytogenetics: An Indispensable Tool for Cancer Diagnosis
Thomas S. K. Wan,Edmond S. K. Ma
Chang Gung Medical Journal , 2012,
Abstract: Cytogenetic aberrations may escape detection or recognition in traditional karyotyping. The past decade has seen anexplosion of methodological advances in molecular cytogenetics technology. These cytogenetics techniques add color to theblack and white world of conventional banding. Fluorescencein-situ hybridization (FISH) study has emerged as an indispensable tool for both basic and clinical research, as well asdiagnostics, in leukemia and cancers. FISH can be used toident i fy chromosoma l abnorma l i t i e s through f luor e s c entlabeled DNA probes that target specific DNA sequences.Subsequently, FISH-based tests such as multicolor karyotyping, comparative genomic hybridization (CGH) and arrayCGH have been used in emerging clinical applications as theyenable resolution of complex karyotypic aberrations and wholeglobal scanning of genomic imbalances. More recently, crossspecies array CGH analysis has also been employed in cancer gene identification. The clinical impact of FISH is pivotal, especially in the diagnosis, prognosis and treatment decisionsfor hematological diseases, all of which facilitate the practice of personalized medicine.This review summarizes the methodology and current utilization of these FISH techniquesin unraveling chromosomal changes and highlights how the field is moving away from conventional methods towards molecular cytogenetics approaches. In addition, the potential ofthe more recently developed FISH tests in contributing information to genetic abnormalitiesis illustrated.
Case studies of the propagation characteristics of auroral TIDS with EISCAT CP2 data using maximum entropy cross-spectral analysis
S. Y. Ma,K. Schlegel,J. S. Xu
Annales Geophysicae (ANGEO) , 2003,
Abstract: In this paper case studies of propagation characteristics of two TIDs are presented which are induced by atmospheric gravity waves in the auroral F-region on a magnetic quiet day. By means of maximum entropy cross-spectral analysis of EISCAT CP2 data, apparent full wave-number vectors of the TIDs are obtained as a function of height. The analysis results show that the two events considered can be classified as moderately large-scale TID and medium-scale TID, respectively. One exhibits a dominant period of about 72 min, a mean horizontal phase speed of about 180 m/s (corresponding to a horizontal wavelength of about 780 km) directed south-eastwards and a vertical phase speed of 55 m/s for a height of about 300 km. The other example shows a dominant period of 44 min, a mean horizontal phase velocity of about 160 m/s (corresponding to a horizontal wavelength of about 420 km) directed southwestwards, and a vertical phase velocity of about 50 m/s at 250 km altitude. Key words. Ionosphere · Auroral ionosphere · Ionosphere-atmosphere interactions · Wave propagation)
Ocena zaburzeń postawy cia a kobiet po radykalnej amputacji z jednoczasow rekonstrukcj piersi
Ma gorzata B k, S awomir Cie la
Physiotherapy , 2009, DOI: 10.2478/v10109-009-0039-2
Abstract: Surgical treatment of breast cancer aims at minimizing of post-operative trauma, while maintaining full oncological effectiveness at the same time. Despite that, women operated due to breast cancer often suffer from postural disorders. In Poland, in the cases, when radical mastectomy is required, the operation is often followed by immediate breast reconstruction using Becker permanent expander prosthesis. The aims of this study are the assessment of postural disorders in women after mastectomy and immediate breast reconstruction using Becker-25 prosthesis and comparison of the research group with other women after mastectomy. The research was conducted on 80 women - 40 women were subjected to radical mastectomy and breast reconstruction and the other 40 women underwent radical mastectomy and immediate breast reconstruction using Becker-25 prosthesis. The control group consisted of 40 women, who had not been treated due to breast cancer. Posture was assessed by means of computerized photogrammetry. In women after mastectomy, posture was evaluated 6 months after the surgery. Larger postural disorders in the frontal plane were observed in women who had been subjected to mastectomy and breast reconstruction. Those changes concerned the placement of shoulder blades, shoulders, pelvis, waist triangles height, trunk inclination and deviation of the spinous process line from the vertical axis of the body. Those differences (apart from the waist triangles height) turned out to be statistically significant. Women after mastectomy tended more to lean forward in comparison to women with Becker-25 prosthesis. There were no significant differences of the analysed parameters between women after breast reconstruction and the healthy women, apart from the pelvis inclination angle. Findings allow one to state that the applied immediate breast reconstruction helps reduce the negative postural changes in women operated for breast cancer.
Case Report - Atropa Belladonna intoxication: A case report
MA Berdai, S Labib, K Chetouani, M Harandou
Pan African Medical Journal , 2012,
Abstract: Atropa Belladonna is a poisonous plant also called deadly nightshade. Its roots leaves and fruits contain alkaloids: atropine, hyocyamine and scopolamine. The risk of poisoning in children is important because of possible confusion with other berries. Atropa Belladonna acute intoxication is a severe condition, it’s should be considered in the presence of anti-cholinergic toxidrome, the differential diagnosis include other plants or psychoactive drugs containing atropine. The treatment is mainly symptomatic including gastrointestinal decontamination with activated charcoal. In severe cases, physostigmine can be used as an antidote. We report the case of 11 year old girl with Atropa Belladonna poisoning which was administrated in a therapeutic purpose as a remedy to jaundice. The child presented essentially a central anti-cholinergic syndrome. She was admitted in the intensive care unit, the progression was favorable with symptomatic treatment.
Parameterization of sea-salt optical properties and physics of the associated radiative forcing
J. Li, X. Ma, K. von Salzen,S. Dobbie
Atmospheric Chemistry and Physics (ACP) & Discussions (ACPD) , 2008,
Abstract: The optical properties of sea-salt aerosol have been parameterized at shortwave and longwave wavelengths. The optical properties were parameterized in a simple functional form in terms of the ambient relative humidity based on Mie optical property calculations. The proposed parameterization is tested relative to Mie calculations and is found to be accurate to within a few percent. In the parameterization, the effects of the size distribution on the optical properties are accounted for in terms of effective radius of the sea-salt size distribution. This parameterization differs from previous works by being formulated directly with the wet sea-salt size distribution and, to our knowledge, this is the first published sea-salt parameterization to provide a parameterization for both shortwave and longwave wavelengths. We have used this parameterization in a set of idealized 1-D radiative transfer calculations to investigate the sensitivity of various attributes of sea-salt forcing, including the dependency on sea-salt column loading, effective variance, solar angle, and surface albedo. From these sensitivity tests, it is found that sea-salt forcings for both shortwave and longwave spectra are linearly related to the sea-salt loading for realistic values of loadings. The radiative forcing results illustrate that the shortwave forcing is an order of magnitude greater than the longwave forcing results and opposite in sign, for various loadings. Forcing sensitivity studies show that the influence of effective variance for sea-salt is minor; therefore, only one value of effective variance is used in the parameterization. The dependence of sea-salt forcing with solar zenith angle illustrates an interesting result that sea-salt can generate a positive top-of-the-atmosphere result (i.e. warming) when the solar zenith angle is relatively small (i.e. <30°). Finally, it is found that the surface albedo significantly affects the shortwave radiative forcing, with the forcing diminishing to zero as the surface albedo tends to unity.
A Comparative Study on Socio-economic Variables Amongst Ederly People in Tehran
MA Abbasimoghadam,S Dabiran,R Safdari,K Jafarian
Payavard Salamat , 2008,
Abstract: Background and Aim: Aging is a physiological process that is an unavoidable property of life. Decline in some dimensions of aging such as activity, income, health care and changes in life style are associated with increased risk of physical and mental health disorders. The aim of this study was to investigate the association between living areas and the demographic characteristics of elderly people in Tehran.Materials and Methods: A cross - sectional / analytical study was conducted. The sample was consisted of 5600 elderly people and data was collected by using a questionnaire All analyses were undertaken using SPSS (Version 11.5).Results: The results of this study showed that more 50% of subjects were illiterate and 30.5% of the were in schooling level. 62% of them reported at least one disease. We found significant differences between residences of north and south regions of Tehran for many of investigated variables.Conclusion: These findings indicated that we need to pay more attention to elderly status specially those who are living in southern region.
The experiences of research participants offered genetic test results as a result of taking part in a population based ovarian cancer research study?
Young MA,Wake S,Alsop K,Bowtell D
Hereditary Cancer in Clinical Practice , 2012, DOI: 10.1186/1897-4287-10-s2-a15
Pembentukan Model Penciptaan Pengetahuan (Knowledge Creation) dalam Mendorong Inovasi pada Koperasi Susu di Indonesia: Suatu Studi Konfirmatori
A. Sukmawati,M. S. Ma’arif,Marimin,K. Mudikdjo
Media Peternakan , 2008,
Abstract: Many theories highlighted the critical importance of knowledge creation on the long-term success of the organization. However, the scarcity of empirical work on knowledge creation model has limited our understanding of the overall organizational process involved. To overcome this, we attempt a comprehensive analyze of knowledge creation model within the organization, exploring the relationship between innovation, knowledge creation model, problem-solving capability, absorptive capacity, knowledge acquisition and assets. Data of this case study were taken from three dairy cooperations in Java. Analysis was conducted using Structural Equation Modeling (SEM) with Lisrel 8.72. The results revealed that several contributing factors (problem-solving capability, absorptive capacity, knowledge acquisition and assets) had significant effect on innovation. On the other hand, knowledge creation model had no significant effect on innovation in the context of the dairy cooperation in Indonesia. The implication for managers is that by focusing on externalization process in knowledge creation model within the organization. In the pattern of innovations, product innovation is the most important.
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