11 results on '"Scharff S"'
Search Results
2. An Electromagnetic Compatibility Program for the 1970s (Selected Issues).
- Author
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RAND CORP SANTA MONICA CA, Hiebert, A. L., Scharff, S. A., RAND CORP SANTA MONICA CA, Hiebert, A. L., and Scharff, S. A.
- Abstract
To assess electromagnetic compatibility (EMC) problems created by increased dependence on and expanded use of communications-electronics systems, this study examines frequency application requirements, specifications, weapons systems acquisition procedures, and Air Force and industry practices. It also analyzes radio spectrum usage in terms of our capabilities for handling current spectrum utilization and future problems. Emphasis is on the technological aspects of EMC as applied to intrasystem and intersystem compatibility. A promising new technical concept is developed: the application of computers and mathematical models to intrasystem EMC technology and management, including vulnerability assessment, design of specifications, and control process. (Modified author abstract)
- Published
- 1974
3. SPECTRUM ENGINEERING SYSTEM PILOT PROJECT
- Author
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RAND CORP SANTA MONICA CALIF, Hiebert,A. L., Scharff,S. A., RAND CORP SANTA MONICA CALIF, Hiebert,A. L., and Scharff,S. A.
- Abstract
The radio spectrum is sometimes looked upon as one of the nation's natural resources. This is a fruitful viewpoint. Misuse of the resource is entirely possible; unbridled private exploitation is clearly not in the national interest; there is an increasing demand for access to the resource; and much has been discovered through exploratory research and development--and there is much more to learn--about the nature and uses of the resource. There are two unique properties of the spectrum, as a resource. It cannot be 'staked out' on the ground; ownership cannot be established in terms of land rights. The spectrum's second unique property is that it is not consumed in use. In fact, it is wasted if not used. The nation has a complex structure of organizations in and out of government, of laws and customs, of administrative apparatus and concepts, and of technical capabilities through which management of the use of the spectrum resources is effected. Of recent years there has been a remarkably inventive and explosive expansion in ways and intensities of use of the radio spectrum. But there has been nothing like a corresponding advance in the management of the nation's use of the spectrum. (Author)
- Published
- 1969
4. Im deutschen Reich : Zeitschrift des Centralvereins Deutscher Staatsbürger Jüdischen Glaubens / A. P. Altona
- Author
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Scharff, S. and Scharff, S.
- Abstract
S. Scharff
- Published
- 1905
5. Procedimenti giuridici e sanzione religiosa nel mondo greco e romano: un excursus tematico
- Author
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BONANNO, Daniela, Funke, P, Haake, M., Bonanno, D, Funke, P., Haake, M., Bonanno, D., Funke P., Cusumano, N, Drauschke M, Knaepper, K, Gallo A, Stratmann, L, Ingarao, G., Scharff, S, Aletsee, A-S, Lepke, A, Terrinoni, A, Liebs, D, Kuhn, E, Haake, M, Zimmermann, K, Biagetti, C, Buongiorno P, Saggioro, A, Mecella, L, Ferri G, Motta, D., Filippini, A, and Funke, P
- Subjects
Settore L-ANT/02 - Storia Greca ,Settore L-ANT/03 - Storia Romana ,Diritto, religione, società, Grecia, Roma - Abstract
Il saggio propone uno status quaestionis e un'introduzione ai saggi raccolti nel volume "Rechtliche Verfahren und religiöse Sanktionierung in der griechisch-römischen Antike /Procedimenti giuridici e sanzione religiosa nel mondo greco e romano".
- Published
- 2016
6. Transformative experiences at art museums to support flourishing in medicine.
- Author
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Tackett S, Eller L, Scharff S, Balhara KS, Stouffer KM, Suchanek M, Clever SL, Yenawine P, Wolffe S, and Chisolm MS
- Subjects
- Humans, Museums, Learning, Curriculum, Art, Education, Medical, Students, Medical
- Abstract
Purpose: We implemented and evaluated a hybrid 4-week arts-based elective for clinical medical students to support flourishing., Materials and Methods: Five students participated in early 2022. Twelve sessions occurred in-person at art museums and other cultural centers, and five occurred online. Sessions incorporated varied arts-based learning activities, including Visual Thinking Strategies, a jazz seminar, and a mask-making workshop. We evaluated the course via weekly reflective essays, interviews 6 weeks after the course, and pre-post surveys that included four scales with clinical relevance: capacity for wonder (CfW), tolerance for ambiguity (TFA), interpersonal reactivity index, and openness to diversity., Results: Qualitatively, the course helped learners: 1) reconnect with individual characteristics and interests that had been neglected during medical education; 2) better appreciate others' perspectives; 3) develop identities as physicians; and 4) engage in quiet reflection, renewing their sense of purpose. Quantitatively, pre-post mean totals increased for the CfW (32.0 [SD 6.8] vs 44.0 [SD 5.7], p=.006) and TFA scales (16.4 [SD 5.2] vs 24.2 [SD 6.9], p=.033)., Conclusions: This elective facilitated learners' connecting with themselves, others, and their profession with improvement in clinically-relevant measures. This provides further evidence that arts-based education can foster professional identity formation and be transformative for students.
- Published
- 2023
- Full Text
- View/download PDF
7. Sketchbooks & Sutures: A Blog about Learning to Heal.
- Author
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Scharff S
- Subjects
- Education, Medical, Blogging, Learning, Students, Medical
- Published
- 2015
- Full Text
- View/download PDF
8. Silk-elastinlike protein polymers improve the efficacy of adenovirus thymidine kinase enzyme prodrug therapy of head and neck tumors.
- Author
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Greish K, Frandsen J, Scharff S, Gustafson J, Cappello J, Li D, O'Malley BW Jr, and Ghandehari H
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- Animals, Head and Neck Neoplasms genetics, Imaging, Three-Dimensional, Kidney Function Tests, Liver Function Tests, Luciferases metabolism, Luminescent Measurements, Mice, Mice, Nude, Recombinant Fusion Proteins adverse effects, Thymidine Kinase genetics, Treatment Outcome, Xenograft Model Antitumor Assays, Adenoviridae genetics, Biopolymers therapeutic use, Genetic Therapy adverse effects, Head and Neck Neoplasms therapy, Prodrugs therapeutic use, Recombinant Fusion Proteins therapeutic use, Thymidine Kinase therapeutic use
- Abstract
Background: Adenoviral-directed enzyme prodrug therapy is a promising approach for head and neck cancer gene therapy. The challenges faced by this approach, however, comprise transient gene expression and dissemination of viruses to distant organs., Methods: We used recombinant silk-elastinlike protein polymer (SELP) matrices for intratumoral delivery of adenoviruses containing both thymidine kinase-1 and luciferase genes in a nude mouse model of JHU-022 head and neck tumor. Hydrogels made from two SELP analogues (47K and 815K), with similar silk to elastinlike block ratios but different block lengths, were studied for intratumoral viral delivery. Tumor-bearing mice were followed up for tumor progression and luciferase gene expression concomitantly for 5 weeks. Polymer safety was evaluated through body weight change, blood count, and liver and kidney functions, in addition to gross and microscopic histological examination., Results: SELP-815K analogues efficiently controlled the duration and extent of transfection in tumors for up to 5 weeks with no detectable spread to the liver. An approximately five-fold greater reduction in tumor volume was obtained with matrix-mediated delivery compared to intra-tumoral injection of adenoviruses in saline. SELP matrix proved safe in all injected mice compared to the control group., Conclusions: The SELP-controlled gene delivery approach could potentially improve the anticancer activity of virus-mediated gene therapy at the same time as limiting viral spread to normal organs., (Copyright (c) 2010 John Wiley & Sons, Ltd.)
- Published
- 2010
- Full Text
- View/download PDF
9. Estrogen receptor 1 mRNA is a prognostic factor in ovarian carcinoma: determination by kinetic PCR in formalin-fixed paraffin-embedded tissue.
- Author
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Darb-Esfahani S, Wirtz RM, Sinn BV, Budczies J, Noske A, Weichert W, Faggad A, Scharff S, Sehouli J, Oskay-Ozcelik G, Zamagni C, De Iaco P, Martoni A, Dietel M, and Denkert C
- Subjects
- Adenocarcinoma, Clear Cell genetics, Adenocarcinoma, Clear Cell metabolism, Adenocarcinoma, Clear Cell secondary, Adenocarcinoma, Mucinous genetics, Adenocarcinoma, Mucinous metabolism, Adenocarcinoma, Mucinous secondary, Adult, Aged, Aged, 80 and over, Biomarkers, Tumor genetics, Biomarkers, Tumor metabolism, Carcinoma, Transitional Cell genetics, Carcinoma, Transitional Cell metabolism, Carcinoma, Transitional Cell secondary, Cystadenocarcinoma, Serous genetics, Cystadenocarcinoma, Serous metabolism, Cystadenocarcinoma, Serous secondary, Endometrial Neoplasms genetics, Endometrial Neoplasms metabolism, Endometrial Neoplasms secondary, Estrogen Receptor alpha metabolism, Female, Humans, Immunoenzyme Techniques, Middle Aged, Ovarian Neoplasms metabolism, Ovarian Neoplasms pathology, Paraffin Embedding, Prognosis, RNA, Messenger metabolism, Reverse Transcriptase Polymerase Chain Reaction, Estrogen Receptor alpha genetics, Ovarian Neoplasms genetics, RNA, Messenger genetics
- Abstract
Epidemiological and cell culture studies indicate that ovarian carcinoma growth is dependent on estrogen stimulation. However, possibly due to the lack of a reliable biomarker that helps to select patients according to prognostically relevant estrogen receptor (ER) levels, clinical trials using anti-estrogenic therapeutics in ovarian carcinoma have had inconsistent results. Therefore, we tested if ER expression analysis by a quantitative method might be useful in this regard in formalin-fixed paraffin-embedded (FFPE) tissue. In a study group of 114 primary ovarian carcinomas expression of estrogen receptor 1 (ESR1) mRNA was analyzed using a new method for RNA extraction from FFPE tissue that is based on magnetic beads, followed by kinetic PCR. The prognostic impact of ESR1 mRNA expression was investigated and compared to ERalpha protein expression as determined by immunohistochemistry. In univariate survival analysis the expression level of ESR1 mRNA was a significant positive prognostic factor for patient survival (hazard ratio (HR) 0.230 (confidence interval (CI) 0.102-0.516), P=0.002). ERalpha protein expression was correlated to ESR1 mRNA expression (P=0.0001); however, ERalpha protein expression did not provide statistically significant prognostic information. In multivariate analysis, ESR1 mRNA expression emerged as a prognostic factor, independent of stage, grade, residual tumor mass, age, and ERalpha protein expression (HR 0.227 (CI 0.078-0.656), P=0.006). Our results indicate that the determination of ESR1 levels by kinetic PCR may be superior to immunohistochemical methods in assessment of biologically relevant levels of ER expression in ovarian carcinoma, and is feasible in routinely used FFPE tissue.
- Published
- 2009
- Full Text
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10. Comparison of positive allergy skin tests among asthmatic children from rural and urban areas living within small geographic area.
- Author
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Bibi H, Shoseyov D, Feigenbaum D, Nir P, Shiachi R, Scharff S, and Peled R
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- Age Factors, Allergens immunology, Animals, Artemisia, Asthma etiology, Asthma immunology, Cats immunology, Child, Cockroaches immunology, Cupressus, Female, Fungi immunology, Humans, Hypersensitivity, Immediate etiology, Hypersensitivity, Immediate immunology, Israel epidemiology, Male, Mites immunology, Poaceae, Pollen immunology, Surveys and Questionnaires, Trees, Asthma epidemiology, Hypersensitivity, Immediate epidemiology, Rural Population, Skin Tests, Urban Population
- Abstract
Background: Evidence of increased asthma and allergic response among urban versus rural residents has been reported., Objective: To evaluate the prevalence of allergic response among asthmatic children from urban and rural areas living within close proximity., Methods: In all, 448 asthmatic children from urban (363) and rural (85) areas were studied. The study group consisted of 234 9-year-olds and 214 12-year-olds. A health questionnaire was completed on each child who subsequently underwent allergic skin prick tests (SPTs)., Results: There was significantly more positive SPT response to house-dust mite, mold, cat, and cypress among asthmatic children from urban areas compared with children living in rural areas: 58.3% versus 37.6%, 46.1% versus 31.8%, 17.45 versus 5.9%, and 26.2% versus 15.3%, respectively. Positive SPT for indoor allergens were significantly greater among asthmatic urban residents than asthmatic rural residents: 63.3% versus 45.5%, respectively (P < 0.02). Positive SPT response to all the allergens checked was higher among the 12-year-old age group when compared with the 9-year-olds, 34.6% versus 22.7%, respectively (P = 0.05)., Conclusions: Allergic response measured by SPT is significantly more common among asthmatic children from urban areas as opposed to rural, even though both areas are within small distance of one another. Further, asthmatic children living in urban areas demonstrated more allergic response to both indoor and outdoor allergens. The allergic response tends to increase with increased age in both urban and rural asthmatic children.
- Published
- 2002
- Full Text
- View/download PDF
11. Differences in lung function among school children in communities in Israel.
- Author
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Peled R, Bibi H, Pope CA 3rd, Nir P, Shiachi R, and Scharff S
- Subjects
- Child, Child Welfare, Educational Status, Electricity, Epidemiological Monitoring, Female, Humans, Israel epidemiology, Lung Diseases epidemiology, Male, Nitric Oxide adverse effects, Nitric Oxide analysis, Ozone adverse effects, Ozone analysis, Parents education, Power Plants, Regression Analysis, Residence Characteristics statistics & numerical data, Smoking adverse effects, Sulfur Dioxide adverse effects, Sulfur Dioxide analysis, Surveys and Questionnaires, Air Pollutants adverse effects, Air Pollutants analysis, Environmental Monitoring methods, Forced Expiratory Volume, Lung Diseases diagnosis, Lung Diseases etiology, Vital Capacity
- Abstract
Differences in lung functions of school-age children who lived near two electrical power plants in the Ashkelon district of Israel were studied. Lung-function tests were performed, and the American Thoracic Society questionnaire was administered in three study periods during the following years: (1) 1990, (2) 1994, and (3) 1997. Measurements of air pollutants (i.e., sulfur dioxide, nitric oxides, ozone) were also taken during the aforementioned study periods. Statistical analysis included an estimation of a series of fixed-effects regression models. A total of 2,455, 1,613, and 4,346 observations were included in the analyses for study years 1990, 1994, and 1997, respectively. The authors controlled for age, sex, height, weight, parents' education and smoking status, and being born out of Israel, and, consequently, substantial differences in lung function across the different communities and study periods were demonstrated in the study area. No robust association with air pollution was demonstrated. The cause of these differences in the respiratory health of children remains unknown.
- Published
- 2001
- Full Text
- View/download PDF
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