A meta-analysis was conducted using the results of 82 experiments (78 publications, 266 treatments) to investigate the importance of dietary C18 fatty acids (FA) and feeding regimen for milk C18 FA ...profile and apparent recovery of selected FA relative to intake of these FA or their precursors. Feeding treatments based on lipid-supplemented diets were excluded. Feeding regimens were defined as grazing including partial and full-time grazing, at dietary concentrate proportions from 0 to 44% dry matter (DM), forage-based indoor feeding >65% forage of total DM intake (DMI), and concentrate-based indoor feeding (forage DMI ≤65% of DMI). Linoleic acid (LLA), α-linolenic acid (ALA), and total C18 FA proportions in milk fat increased linearly with the respective dietary FA content in all feeding regimens tested. This effect was highest in the forage-based indoor feeding. Slopes were lowest for the grazing regimens, especially regarding ALA and the sum of all C18 FA, whereas the intercepts of the prediction equations of milk ALA and total C18 FA proportions were highest for grazing regimens. This indicates that, in grazing cows, factors other than dietary FA contents determine the C18 FA composition of the milk fat. At equal dietary LLA contents, the type of feeding regimen showed no significant effect on LLA proportion in milk fat. Milk fat proportions of rumenic acid and vaccenic acid were positively related to the sum of dietary ALA and LLA contents. Grazing regimens led to the strongest enrichment of rumenic acid and vaccenic acid in milk fat. The apparent recovery of ALA, LLA, and total C18 FA (secreted, % of intake), an estimate for transfer efficiency, decreased with increasing dietary content. This relationship followed a nonlinear decay function. When the dietary content of these FA exceeded a certain threshold (about 0.2, 0.8, and 2.8% of DM for ALA, LLA, and total C18 FA, respectively) the recovery in milk remained constant at about 5, 10, and 82% of the ingested ALA, LLA, and total C18 FA, respectively. At dietary proportions below 0.01% ALA and 1.5% total C18 FA of DM, their apparent recovery in milk fat exceeded 100%. In conclusion, a general inverse relationship between dietary C18 FA and the corresponding apparent recovery in milk fat seems to exist. Within this frame, the effect of different types of feeding regimens on the eventual milk C18 FA profile varies. Among them, grazing pasture appears to provide the most variable properties.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Do traditional theories of conflict influence juvenile court decision-making and explain racial/ethnic disparities? Racial/ethnic threat, symbolic threat, and structural inequality perspectives ...purport social controls increase when groups differ in race, ethnicity, or class. Scholarship tends to test one perspective at a time and use county as a unit of analysis. Taking a comparative approach, this study evaluates whether contextual indicators of these three theories, measured at the county- and zip code-levels, contribute to Black-White and Latino-White disparities in court decisions. Multilevel models reveal weak and partial support for each perspective. More effects appear at the zip code-level, indicating conflict may occur within rather than across courts. Macro-level theories must then be reconsidered to describe modern-day juvenile court proceedings.
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NUK, OILJ, SAZU, UKNU, UL, UM, UPUK
This article presents a novel approach for the automated 3D-layout planning of multi-station assembly lines. The planning method is based on a comprehensive model of the used production resources, ...including their geometry, kinematic properties, and general characteristics. Different resource types can be included in the planning system. A genetic algorithm generates and optimizes possible layouts for a line. The optimization aims to minimize the line's area and the costs for assembling the line while simultaneously optimizing the resources' positioning to perform their tasks. The line's cycle time is considered as a boundary condition. For the evaluation of different layout alternatives, a multi-body simulation is performed. A parameter study is used to set the algorithm's parameters. Afterward, the algorithm is applied to three increasingly complex examples to validate and evaluate its functionality. The approach is promising for industrial applications as it allows the integration of various resource types and individualization of the optimization function.
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CEKLJ, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Framed within the racial/ethnic threat thesis, the present research examined the relative effects of the size of minority populations and the ratios of White-to-minority unemployment on intake, ...adjudication, and judicial disposition decision making within juvenile court proceedings. Communities with greater Black and Hispanic presence and greater economic equality were expected to increase the social control for youth up to a point, where social control would then diminish. These relationships were anticipated to be stronger for Blacks than Hispanics. The overall pattern of results failed to yield support specifically for these hypothesized effects and in general, for the minority threat perspective. Implications for theory and future research are discussed.
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NUK, OILJ, SAZU, UKNU, UL, UM, UPUK
Systems for the automated planning and design of manufacturing systems have been widely studied and are a promising answer to current challenges arising from shorter product life cycles, high labor ...costs, and increasingly complex production resources. However, implementing these systems entails substantial investment, and their profitability depends on various factors. One of the major difficulties in implementing automated planning systems in an industrial context has been establishing a suitable database of resource models. This article presents an evaluation method to compare the economic efficiency of manual and automated planning, including resource modeling. It also explores different application scenarios to determine under which preconditions automated planning is advantageous and where the limits of their application lie.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Liquid manure from livestock production systems is a major source of nitrogen and phosphorus release from nutrient cycles and a cause of ecosystem eutrophication. Duckweeds, small aquatic plants, may ...be used to recover N and P from livestock slurry while producing high-quality protein feed. In order to assess N and P uptake efficiency and utility for fish feed, two duckweed species, Landoltia punctata and Spirodela polyrhiza, were grown in controlled climate chambers on two nutrient-rich media: diluted (1:10) cattle slurry and mechanically filtered household sewage. Treatments were in triplicate, each running in four cycles with fresh substrate (one week each). Spirodela polyrhiza exhibited the strongest growth (96 g fresh matter m−2 day−1) and highest protein content (306 g per kg dry matter) on diluted slurry. The weakest growth was found for L. punctata on treated sewage (52 g fresh matter m−2 day−1). Average removal of total provided and utilizable inorganic N from the media was 73.2% and 83.9% for sewage and diluted slurry, respectively. Spirodela polyrhiza grown on diluted slurry was subsequently tested as feed ingredient for rainbow trout (Oncorhynchus mykiss) fry. Two different ingredient levels of S. polyrhiza meal (6.25% and 12.5% of feed) were fed to rainbow trout fry for 4 weeks, during which fish growth, feed and nutrient utilization and gut health were assessed. Feed was accepted, but both duckweed meal treatments resulted in 5–10% poorer growth traits and feed efficiency compared to control. The intestine somatic index was not affected. This is the first time the potential of duckweed as feed for rainbow trout fry has been demonstrated. Furthermore, our experiments found considerable N and P uptake from diluted slurry by S. polyrhiza, which produced protein at a high rate per unit time and area.
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•Spirodela polyrhiza and Landoltia punctata grew most rapidly on diluted cow slurry.•Spirodela polyrhiza was found to have a protein content of 306 g kg−1.•Duckweed showed a high nitrogen and phosphorus uptake from media.•Duckweed can be utilized efficiently by rainbow trout fry.•Feed efficiency of duckweed diets was lower than control.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Riboflavin (vitamin B2) is essential for monogastric animals. It is mainly produced by recombinant microorganisms (Candida famata, Bacillus subtilis and Ashbya gossypii). The availability of ...genetically modified organism (GMO)-free riboflavin, obligatory in European organic agriculture, is a major issue. Besides, requirements for organic livestock might differ from conventional production because other genotypes and feed formulations are used. The effects of a fermentation suspension with a high native content of riboflavin produced with unmodified A. gossypii by fermentation were investigated at graded dosages as an alternative to conventional (GMO-based) riboflavin in slow-growing broilers on performance traits and health and welfare indicators. In 2 runs with 800 animals each, Ranger Gold™ broilers were fed with 4 dietary treatments. For starter diets (day 1 to 18), treatments included a basal diet (1) without any riboflavin supplementation (negative control, N-C), (2) with conventional riboflavin supplementation (Cuxavit B2 80% riboflavin) at 9.6 mg/kg (positive control, P-C), (3) with riboflavin supplementation from the alternative source at 3.5 mg/kg (A-low) and (4) with riboflavin supplementation from the alternative source at 9.6 mg/kg (A-high). For the finisher diet (day 29 until slaughtering), P-C and A-high were supplemented with 8.0 mg/kg and A-low with 3.5 mg/kg. Diets were formulated according to organic regulations. Animals were kept in floor pens with 20 chickens per pen. Weekly, BW, feed and water consumption were recorded. Every second week, animal-based health and welfare indicators (feather score and footpad dermatitis) were scored. Slaughter traits were assessed for five males and females per pen at 62/63 days of age. Final body weight of A-high differed from N-C and A-low, but not from P-C. From week 2 until six years of age, A-high had a higher daily weight gain when compared to all other groups. With 74.4%, dressing percentage was higher in A-high compared with all other groups (73.3%). Breast percentage of A-low was lower than that of both control groups but did not differ from A-high. The highest frequency of liver scores indicating fatty liver syndrome was found in P-C, followed by N-C and A-low. Feather scores did not respond to treatment; the highest frequency of mild footpad dermatitis was observed in A-high, however at a low prevalence. In conclusion, the tested fermentation suspension with a high native content of riboflavin derived from fermentation of A. gossypii can be used at levels of commercial recommendations as alternative to riboflavin produced from GMO in broiler feeding. Further studies must verify whether riboflavin can be reduced without inducing riboflavin deficiency in slow-growing broilers.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Based on interpretations of an integrated focal concerns and loosely coupling framework, individual and joint relationships involving race and gender with case outcomes were examined as well as ...possible tempering effects by crime severity and the stage in the proceedings. The results from multiple logistic regression indicate mixed support for the theoretical framework in terms of the ability to determine at what stages race and gender effects would be most evident. Crime severity was predictive of decision making and in some cases had a conditioning effect on the discovered race/gender relationships with case outcomes. The implications of the findings and directions for future research are discussed.
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NUK, OILJ, SAZU, UKNU, UL, UM, UPUK
Although Tittle and Curran in 1988 found support for the symbolic threat hypothesis, no further empirical investigations of the perspective have occurred to explain the contingencies of juvenile ...justice decision-making. We argue that past research has neglected this multilevel theory by only focusing on the "symbolic threat" thesis component, mischaracterizing the perspective as an inequality theory, or classifying the model as a derivative of Blalock's minority group threat perspective. We contend that the original formulation of the symbolic threat hypothesis is a distinctive theory and offers a viable alternative to inequality and other racial/threat theoretical perspectives. The current study empirically tests the perspective in its entirety by examining the interrelationships between county-level characteristics (i.e. youth and minority populations), a juvenile's race/ethnicity, and engaging in "moral offenses" with juvenile justice decision-making. The findings provide insight into the influence of contextual factors on the social control of youth of different racial/ethnic backgrounds.
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BFBNIB, NUK, PILJ, PRFLJ, SAZU, UL, UM, UPUK
•We investigated specific riboflavin requirements for organic poultry.•Medium or low supplements of riboflavin were given to breeder hens and their chicks.•4.0 mg riboflavin supplementation was ...sufficient for the animals at all stages.•2.5 mg riboflavin supplement per kg feed impaired growth of the broilers.•The results contribute for adjusting riboflavin supplements in organic feeds.
Data from breeder hens and chicks are particularly critical for the development of vitamin B2 recommendations for organic poultry. To test safe thresholds of supplementation, 100 breeder hens (Hubbard JA 57 K) and ten cockerels were allocated to ten housing groups, with each receiving supplementation of either 4.0 (treatment CON) or 2.5 mg (treatment RED) riboflavin per kg feed. After 15 weeks of experimental feeding, 256 eggs were incubated. From the hatched chicks (Hubbard S757), 192 were allocated to four treatments based on their parents’ treatment (CON- or RED-) and on their own supplementation of either 4.0 (-CON) or 2.5 mg (-RED) riboflavin per kg feed. Two groups of each combination (CON-CON, CON-RED, RED-CON, RED-RED), each with 24 chicks of both sexes, were fattened for nine weeks and slaughtered. Analysis of total riboflavin (sum of native concentrations and supplements) in the parent’s feeds revealed an average, over the 15 weeks, of 7.8 and 5.8 mg per kg feed for CON and RED, respectively. Body weight, plumage integrity, gait appearance, footpad, claw and keel bone integrity, lesion scores, laying performance, and egg mass were found to be of similarly high levels for all hens without any treatment effects. Performance traits of the hens in both treatments reached the specifications of the producer for this genotype. Yolk and albumen riboflavin concentrations were not affected although yolk colour in the RED treatment group became darker. Fertility was not affected, and hatchability was 100 per cent. Total riboflavin concentrations in the broiler diets were on average, over 9 weeks, 8.2 and 6.1 mg/kg for CON and RED, respectively. In chicks, RED treatment of their parents led to significant depressions of feed intake and growth. The RED treatment of the chicks themselves also impaired growth. Growth rates of the CON-CON treatment were in line with the specifications of the producer for this genotype. Plumage scores, footpad integrity and walking appearance of the broilers, and dressing percentage of the carcasses were not affected by treatment. The RED treatment of chicks caused lower spleen and heart weights, while pancreas and liver weights, and liver riboflavin concentrations were not affected. In conclusion, supplementation of 4.0 mg/kg to organic diets did not evoke any health or performance problems for breeder hens or broiler chicks, while a supplementation level of 2.5 mg per kg feed led to reduced weight gains, although without any other riboflavin deficiency symptoms.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
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