2,710 research outputs found
SUPPLY RESPONSE AND IMPACT OF GOVERNMENT-SUPPORTED CROPS ON THE TEXAS VEGETABLE INDUSTRY
Supply functions, elasticity estimates, and nonjointness test results consistently indicated that few commodities compete economically in the production of six major Texas vegetables (cabbage, cantaloupes, carrots, onions, potatoes, and watermelons). Significant bias effects caused by government-supported commodities, fixed inputs, and technological change were observed and measured. Nonnested test results for the hypothesis of sequential decision making by vegetable producers were inconclusive, but they gave greater likelihood support to sequential than to contemporaneous decision making.Demand and Price Analysis,
Investigation of alpha-nuclear potential families from elastic scattering experiments
In this work we present the continuation of the reported analysis [1] of the experimentally measured angular distributions of the reaction Cd-106(alpha, alpha)Cd-106 at several different energies around the Coulomb barrier. The difficulties that arise in the study of Cd-106-alpha-nuclear potential and the so called Family Problem are addressed
Supporting GUI exploration through USS tool
Advances in usability and design techniques (e.g. user-centered design) try to facilitate the use of interactive systems. However, users still have to adapt to interactive systems, i.e. they have to learn the steps required to accomplish a task either by trial and error or by obtaining help. While advanced users are usually able to adapt without much effort this is far from being the case with beginners. Some interactive systems offer different interaction styles in an attempt to meet the needs of all types of user but this is not the case with all interactive systems. In this sense, we present an approach to support the use of any interactive system making use of enriched models and picture-driven computing to achieve tasks automation. The USS tool (User Support System) is the basis to the adaptation of interactive systems accordingly to the users' needs. The approach provides the foundation for the addition of help (based on demonstration) to any graphical user interfaces (GUI) facilitating learning and use. The work is illustrated by a case study and completed with a preliminary user evaluation which provides insights about the validity of the approach.info:eu-repo/semantics/publishedVersio
Youth-caregiver relationship quality in residential youth care: Professionals’ perceptions and experiences
This study aimed to explore the perceptions and experiences of professionals working in residential care (RC) settings (i.e., caregivers and directors) about youth-caregiver relationship quality (YCRQ). Method: A qualitative study was developed in Portugal including 15 caregivers (73.3% women, 23–50 years) and 15 directors (73.3% women, 34–45 years) working in 18 generalist RC units. Data were collected through six focus groups using a semi-structured interview script. Data were analyzed following a content analysis approach using NVIVO 12 software. Results: Our findings revealed that the concept of YCRQ in RC was mainly described in terms of good qualities, and the organizational determinants of YCRQ relationships were most mentioned both by caregivers and directors (i.e., organizational social context, intervention models and strategies). Individual characteristics of youth and staff were less described as determinants of YCRQ. These findings provide important insights for practice. Conclusions: efforts should be made to design interventions in RC that aim to improve its organizational social climate so as to provide caregivers with the necessary support and resources that enable them to enhance positive YCRQ.info:eu-repo/semantics/publishedVersio
Apresentação Nodular de Linfoma Hepático Primário
The liver is usually affected in advanced stages of lympho-proliferative diseases, but primary liver lymphomas (PLLs) are rare. The diagnosis is usually late, especially in patients without identifiable risk factors, with consequent worse prognosis. We report the case of a 59-year-old female with progressive worsening pain in the right hypochondrium and weight loss. She was previously healthy and had a family history of gastrointestinal and gynecologic neoplasms. During the initial investigation, three liver nodules suggestive of liver metastases were found. Nevertheless, no primary neoplasm was identified in a subsequent evaluation with imaging and endoscopic exams. Laboratory exams excluded hepatic infections, metabolic diseases, and acquired immunosuppression. Biopsy of the lesions revealed diffuse large B-cell lymphoma. Lymph node and medullar involvement were excluded, and the diagnosis of PLL was assumed. The patient started chemotherapy with R-CHOP. With this case, we intend to alert for this differential diagnosis of liver nodules, even in the absence of predisposing conditions for lymphoma. We point out the need to define universal diagnosis criteria for this pathology.O fígado é geralmente afetado em estádios avançados de doenças linfoproliferativas, mas os linfomas primários do fígado são raros. O diagnóstico é habitualmente tardio, principalmente em doente sem fatores de risco identificados, e consequentemente com pior prognóstico. Apresentamos
o caso de uma doente de 59 anos, com quadro álgico de intensidade crescente no hipocôndrio direito e
perda ponderal. A doente era previamente saudável e tinha história familiar de neoplasia gastrointestinal e ginecológica. No estudo inicial, foram identificadas três imagens nodulares hepáticas sugestivas de metástases.
No entanto, não se identificou tumor primário em exames de imagem nem endoscópicos. Foram também excluídas infeções hepáticas, doença metabólica e imunossupressão adquirida. A biópsia das lesões hepáticas revelou tratar-se de linfoma B difuso de grandes células. Foi excluído
envolvimento ganglionar e medular pelo que se assumiu o diagnóstico de Linfoma Primário do Fígado. A
doente iniciou quimioterapia com R-CHOP. Com este caso pretendemos alertar para a necessidade de equacionar este diagnóstico diferencial de nódulos hepáticos, mesmo
na ausência de fatores de risco para linfoma. Também alertamos para a necessidade de se definirem critérios diagnósticos universais para esta patologia.info:eu-repo/semantics/publishedVersio
Substance use and treatment outcomes among Spanish-speaking Latino/as from four acculturation types.
The purpose of this study was to examine the association of acculturation with substance use treatment outcomes in a sample of treatment-seeking Latino/as (N = 405). The study used data from a multisite randomized controlled trial of a culturally adapted version of Motivational Enhancement Therapy delivered in Spanish. Berry, Kim, Minde, and Mok\u27s (1987) acculturation model was used to divide the sample into 4 types (integrated, assimilated, separated, marginalized), based on Bicultural Involvement Questionnaire scores. One-way analyses of variance, chi-squared tests, and repeated-measures regression were used to examine baseline acculturation, posttreatment outcomes, and follow-up outcomes. All participants were of Latino/a background, and 88.4% of the sample was male. Participants with greater acculturation to American culture (i.e., integrated and assimilated acculturation types) reported more substance use and associated problems at baseline, χ²(3) = 20.5, p \u3c .001, with the integrated type reporting the highest percentage of substance use disorder symptoms and problems (67.6%). No significant differences in substance use were detected among acculturation types posttreatment or at follow-up. Although the integrated and assimilated acculturation types were associated at baseline with more substance use and associated problems, all acculturation types seemed to benefit at posttreatment from an evidence-based culturally adapted treatment. (PsycINFO Database Recor
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