325 research outputs found

    On protecting farmers' new varieties: new approaches to rights on collective innovations in plant genetic resources

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    "Current farmers' breeding goes beyond the gradual selection in landraces, and includes development and maintenance of major new farmers' varieties that are rather uniform, in particular in South-East Asia. Modern varieties developed in the formal sector have simply replaced landraces as the source of diversity, but have not abolished farmers' breeding practices. Interpretations of the new international agreements on plant genetic resources should protect the development of modern farmers' varieties. However, ensuring recognition of collective innovation, allowing access to relevant germplasm sources for farmers' breeding activities, keeping materials freely available, and arranging for effective benefit sharing, all form major challenges. This paper proposes a new protective measure: namely “origin recognition rights." Author's AbstractLandraces, Farmers' varieties, Collective rights, Declaration of origin, Origin recognition, Germplasm resources,

    Does Spirituality or Religion Positively Affect Mental Health? Meta-analysis of Longitudinal Studies

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    The objective of this meta-analysis was to determine the longitudinal positive effect of religion or spirituality (R/S) on mental health. We summarized 48 longitudinal studies (59 independent samples) using a random effects model. Mental health was operationalized as a continuous and a dichotomous distress measure, life satisfaction, well-being, and quality of life. R/S included participation in public and private religious activities, support from church members, importance of religion, intrinsic religiousness, positive religious coping, meaningfulness, and composite measures. The meta-analysis yielded a significant, but small overall effect size of r = .08 (95% CI: 0.06 to 0.10). Of eight R/S predictors that were distinguished, only participation in public religious activities and importance of religion were significantly related to mental health (r = .08 and r = .09, respectively; 95% CI: 0.04 to 0.11 and 0.05 to 0.12, respectively). In conclusion, there is evidence for a positive effect of R/S on mental health, but this effect is small

    The Role of the Spiritual Meaning System in Coping with Cancer

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    Spirituality can support the adjustment process of people with cancer, by forming a meaning system that supports understanding of the cause and implications of the experience and that provides coping strategies. The different ways in which spiritual meaning systems might fulfill these roles were examined among 20 people who were treated for cancer with curative intent. Narrative interviews were held on average 16 months after cancer diagnosis. The interviews were analyzed in a two-stage process, based on a holistic content approach. The first stage led to the identification of various roles and outcomes of the meaning system. The second stage involved a comparison of these roles and outcomes between previously defined types of meaning systems. The roles identified were discrepancy, legitimation and continuation. Legitimation was associated with the outcome of integration, whereas continuation was associated with an outcome of a positive outlook toward the future. Several differences were found between types of meaning systems, regarding the extent to which and ways in which these roles and outcomes occurred. This study underscores recommendations that healthcare professionals should be aware of the different ways in which the patient’s previous beliefs and experiences influence their current adaptation to serious life events

    A critical analysis of scales to measure the attitude of nurses toward spiritual care and the frequency of spiritual nursing care activities

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    Quantitative studies have assessed nurses' attitudes toward and frequency of spiritual care [SC] and which factors are of influence on this attitude and frequency. However, we had doubts about the construct validity of the scales used in these studies. Our objective was to evaluate scales measuring nursing SC. Articles about the development and psychometric evaluation of SC scales have been identified, using, Web of Science, and CINAHL, and evaluated with respect to the psychometric properties and item content of the scales. Item content was evaluated by each of the five authors with respect to the following questions: Does the item (1) reflect a general opinion about SC instead of a personal willingness to offer SC; (2) reflect general psychosocial care instead of specific SC; (3) focus solely on religious care; (4) contain the words 'spiritual' (care/needs/health/strengths, etc.); and (5) contain multiple propositions, or have an unclear meaning? We found eight scales. Psychometric analysis of these scales was often meager and the items of all but one scale suffered from two or more of the five problems described above. This leads us to conclude that many quantitative results in this area are based on findings with questionable scales. Suggestions for improvements are provided

    Genetic diversity trends in twentieth century crop cultivars: a meta analysis

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    In recent years, an increasing number of papers has been published on the genetic diversity trends in crop cultivars released in the last century using a variety of molecular techniques. No clear general trends in diversity have emerged from these studies. Meta analytical techniques, using a study weight adapted for use with diversity indices, were applied to analyze these studies. In the meta analysis, 44 published papers were used, addressing diversity trends in released crop varieties in the twentieth century for eight different field crops, wheat being the most represented. The meta analysis demonstrated that overall in the long run no substantial reduction in the regional diversity of crop varieties released by plant breeders has taken place. A significant reduction of 6% in diversity in the 1960s as compared with the diversity in the 1950s was observed. Indications are that after the 1960s and 1970s breeders have been able to again increase the diversity in released varieties. Thus, a gradual narrowing of the genetic base of the varieties released by breeders could not be observed. Separate analyses for wheat and the group of other field crops and separate analyses on the basis of regions all showed similar trends in diversity

    Ejection Regimes in Picosecond Laser-Induced Forward Transfer of Metals

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    Laser-induced forward transfer (LIFT) is a 3D direct-write method suitable for precision printing of various materials, including pure metals. To understand the ejection mechanism and thereby improve deposition, here we present visualizations of ejection events at high-spatial (submicrometer) and high-temporal resolutions, for picosecond LIFT of copper and gold films with a thickness 50  nm≤d≤400  nm . For increasing fluences, these visualizations reveals the fluence threshold below which no ejection is observed, followed by the release of a metal cap (i.e., a hemisphere-shaped droplet), the formation of an elongated jet, and the release of a metal spray. For each ejection regime, the driving mechanisms are analyzed, aided by a two-temperature model. Cap ejection is driven by relaxation of thermal stresses induced by laser-induced heating, whereas jet and spray ejections are vapor driven (as the metal film is partly vaporized). We introduce energy balances that provide the ejection velocity in qualitative agreement with our velocity measurements. The threshold fluences separating the ejection regimes are determined. In addition, the fluence threshold below which no ejection is observed is quantitatively described using a balance between the surface energy and the inertia of the (locally melted) film. In conclusion, the ejection type can now be controlled, which allows for improved deposition of pure metal droplets and spray

    Toward 3D Printing of Pure Metals by Laser-Induced Forward Transfer

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    3D printing of common metals is highly challenging because metals are generally solid at room conditions. Copper and gold pillars are manufactured with a resolution below 5 μm and a height up to 2 mm, using laser-induced forward transfer to create and eject liquid metal droplets. The solidified drop's shape is crucial for 3D printing and is discussed as a function of the laser energ
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