196,023 research outputs found
METABOLIC EFFECTS AND REPRODUCTIVE PERFORMANCES IN DAIRY COWS TREATED WITH A FUNCTIONAL FEED (NAT®W3)
No full textThe Authors investigated to correlate metabolic efficiency to reproductive performances by the administration of functional feed in high-producing dairy cattle. The trial want to study, also, the capability of laboratory diagnostic in evaluation and estimation of the reproductive capacities to select subjects to submit to reproductive praxis.
Functional feed contains vitamins E, A, D3, organic-selenium, polyinsaturated fatty acids (PUFA) and a prebiotic by fermented cereals. Effects of PUFA administered were particularly investigated in lipoprotein fractions composition, in blood. Optimal relationship among LDL-cholesterol, total cholesterol and progesteron was related to best reproductive performances: in this trial. Authors can confirm this on the basis of livestock performances. Study realized during the most worm period of the year when mean daily temperature go up to 30°C.
Metabolic parameters considered are linked to energetic, mineral and endocrine metabolisms. Determination were realized in blood-samples before, during, after the administration of NAT3. Bovines were fed with different addition of NAT3 (320-360 g/subj/die) for 4 months.
Reproductive indices studied were: open-days and number of services per conception.
Trend analysis of fertility indices demonstrated that blood levels of progesterone and blood antioxidant capability are strictly correlated and correlated also to reproductive performances.
Efficacy of treatment is demonstrated by the trend of the fertility indices in the post treatment period during which indices return progressively to the pre treatment values in about 60 days: this period correspond to the lipid tissue turnover time. During these days a temporary build-up of PUFA and liposoluble vitamins was observed.
Blood progesterone levels were higher (2.2 times) in correspondence of the 21st day post partum in treated subjects respect to control ( 0.18 vs 0.44 ng/l). Reproductive indexes recorded stressed that open-days varied from to . Number of services per conception was reduced from 121 to 95 at 60th day of treatment. In the next four months the value of the index settled between 90-95 days.
Data obtained in this study show that administration of PUFA, antioxidants and probiotics administred in dairy cows can remodel metabolisms correlated to fertility such as progesterone, prostaglandins and prostacyclins synthesis. These evidences are stressed by trends recorded in the herd concerning values of open-days and the number of services per conception
DAIRY COWS TREATED WITH A FUNCTIONAL FEED (NAT3): INVESTIGATION ON PUFA’S TRANSFER IN MILK AND CHEESES
No full textIn a previous trial we have demonstrated the increased content of fatty acids CLA and DHA in milk following to the administration of a functional feed NATW3(WBC 2008, Budapest). This study is to demonstrate that lower quantity of NATW3 in feed (320 g/subj./day vs 600 g/subj./day) resolves in similar results: decrease in SFA and increase in PUFA, especially cis-9 18:1, CLA and DHA. Trend of metabolic parameters was confirmed, expecially for lipidic status.
The trial involved 116 high-producing dairy cows belonging to two livestocks fed with the same feed: grass family hay (especially oat hay), grass family hay silage (triticale and barley), and industrial feed. The difference concerned the way of administration of industrial feed, ad libitum and with automatic feeding system. Milk was utilized for cheesemaking.
Analysis of lipid fractions stressed variations in composition , especially pointed out the transfer of PUFA in different cheeses, making their composition more suitable for a more salutistic intake.
“Mozzarella": total lipids +0,96%, total proteins +1,22%, CLA (C18: 2) +118,67%, DHA (C22: 6) +27%, EPA (C20: 5) +60,00%, palmitoleic acid (C16: 1) +29,15%, decrease of stearic acid(C18: 0) --9,84%.
”Canestrato": total lipidis +0,46%, total proteins +0,66%, CLA (C18: 2) +160,42%, DHA (C22: 6) + 80,00%, EPA (C20: 5) +154,54%, palmitoleic acid (C16: 1) +39,00%, decrease of stearic acid (C18: 0) -12,73%.
”Caciocavallo": total lipids +2,48%, total proteins +0,33%, CLA (C18: 2) +58,28%, DHA (C22: 6) + 55,00%, EPA (C20: 5) +76,67%, palmitoleic acid (C16: 1) +40,12%, decrease of stearic acid (C18: 0) -11,92%
Pose-estimation methods for underactuated cable-driven parallel robots
No full textCable-Driven Parallel Robots (CDPRs) displace the end-effector (EE) by means of cables configured in a parallel fashion. When a CDPR employs fewer cables than the degrees of freedom (DoFs) of its EE, it is underactuated and underconstrained. As a result, only a limited subset of the EE DoFs can be controlled assigning specific cable lengths, and determining the EE pose through direct kinematics (DK) is unfeasible, since it also depends on mechanical equilibrium. To estimate the EE pose, then, it may be convenient to acquire and combine redundant measurements. This paper introduces a sensor fusion technique that aims at achieving the optimal estimation of the pose of a generic UACDPR. Sensor fusion is achieved by an iterative nonlinear weighted least-square algorithm, which is solved by a Gauss–Newton-like method. A novel criterion for terminating iterations, which is physically sound and straightforward to implement, is put forward. Different redundant measurements are experimentally compared, so as to show the performance of the method with different sensors involved
Sensitivity of the Direct Kinematics of Underactuated Cable-Driven Parallel Robots to Redundant Sensor-Measurement Errors
No full textUnderactuated cable-driven parallel robots (UACDPRs) displace a 6-degree-of-freedom end-effector (EE) with less than 6 cables. As a consequence, the EE is underconstrained and, for assigned cable lengths, the EE pose cannot be obtained from geometrical constraint equations only. In this paper, we study the performance of a direct-kinematics algorithm using redundant sensor measurements for a 4-cable UACDPR. The proposed method measures two orientation parameters of the EE besides cable lengths, in order to determine the other four pose variables, namely 3 position coordinates and one additional orientation parameter. A methodology for the computation of the sensitivity of the direct-kinematics solution to measurement errors is finally proposed
Valutazione dei costi di transazione privati nelle misure agro-ambientali
No full textI costi di transazione sono un tema di crescente attualità nella letteratura inerente allo studio delle politiche agricole, in particolare per quelle politiche che incentivano la produzione di beni con caratteristiche di esternalità. Questo contributo ha l’obiettivo di fornire una valutazione ex post dei costi di transazione privati di alcune misure agro-ambientali applicate in Emilia Romagna
Valutazione dei costi di transazione privati nelle misure agro-ambientali
No full textI costi di transazione sono un tema di crescente attualità nella letteratura inerente allo studio delle politiche agricole, in particolare per quelle politiche che incentivano la produzione di beni con caratteristiche di esternalità. Questo contributo ha l’obiettivo di fornire una valutazione ex post dei costi di transazione privati di alcune misure agro-ambientali applicate in Emilia Romagna
Pose-Estimation Methods for Planar Underactuated Cable-Driven Parallel Robots
No full textPlanar underactuated cable-driven parallel robots (UACDPRs) employ less than three cables to control the pose of the end-effector (EE). Consequently, the EE pose cannot be calculated only from cable-length geometrical constraint equations. In order to solve the direct kinematic problem, redundant measurements may be acquired, and the EE pose calculated by optimizing the resulting system of nonlinear equations. For the optimal pose estimation of planar UACDPRs, this paper presents three sensor fusion algorithms based on nonlinear weighted least squares equations, differing for the algorithm termination conditions. Additionally, different redundant measurement sets are experimentally compared
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
How do Bulgarian farmers spend money from direct payment – some evidences for future CAP design
No full textThis paper analyses farm household strategies and investment behaviour of Bulgarian farmers with a particular focus on the perceived effects of Common Agriculture Policy (CAP). The survey is based on a sample of 83 Bulgarian farms, carried out during 2007 by the Institute of Agricultural Economy (IAE). The farms were selected from 6 less favourite areas in the country which participate in a pilot project aiming to pre-test the effect of direct payments on
different farm types. Based on this, three farm types with different specialisation (arable crops, livestock and vegetables), all implementing conventional technology were chosen. The survey includes information about farm and household structure, expectations, reaction to planned and intended investment. Direct payments are normally used in the farm with aim to cover current costs and investment expenditure
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
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