Identification and measurement of inefficiencies in leasing systems (An application of linear programming)

This study is directed toward developing procedures for identifying, measuring and appraising intratemporal dissociations between benefits and costs on rented farms. Development of these procedures is expected to provide further insight into the resource structure and operation of a firm in which multiple interests are present. Recent studies appear to have achieved a satisfactory agreement in defining the functions of a lease, thus providing a common starting point for economic analysis.3 Chryst and Timmons have summarizd the purposes of farm rent: 1. It helps allocate resources among particular kinds and amounts of uses in the productive process. 2. It distributes returns between landlord and tenant from the joint use of their combined resources. 3. It helps to keep landlords and tenants working together as teams, which is necessary in the continued joint use of their combined resources.

The Effect of Cromolyn Sodium and Nedocromil Sodium Administered by A pressurized Aerosol with A spacer Device on Exercise-Induced Asthma in Children

To compare the effectiveness of cromolyn sodium (CS) (10 mg) and nedocromil sodium (NS) (4 mg) administered by a metered dose inhaler (MDI) with a spacer device in preventing exercise-induced asthma (EIA), eight asthmatic children with EIA were studied in a randomized double-blind, cross-over, placebo-controlled study, CS and NS provided significant, comparable protection from EIA and both were better than placebo. We conclude that CS and NS administered by a pressurized aerosol with a spacer device provide equal protection against EIA in children

Analgesia and/or anaesthesia during piglet castration–part I: efficacy of farm protocols in pain management

Pain alleviation associated with surgical castration of piglets is a debated welfare issue. The present study compares the effect of different protocols involving analgesia and/or anaesthesia or sedation suitable under field conditions, with the aim to alleviate pain due to castration in piglets. A randomised within-litter design, with 50 replicates, compared 7 treatments applied 10 min before castration: HAND: positive control, handling only; CTRL: negative control, physiological saline, i.m.; MEL: meloxicam, i.m.; AZA: azaperone, i.m.; PROC: local anaesthesia with procaine and adrenaline, subcutaneously; AZA-MEL: joint administration of azaperone and meloxicam; PROC-MEL: procaine and meloxicam. Efficacy of pain relief was assessed during a 180 min period after castration by serum cortisol and glycaemia, algometry and behaviour. CTRL, AZA, PROC and AZA-MEL piglets showed an increase in cortisol concentration 60 min after castration compared to HAND. Both groups with azaperone (AZA and AZA-MEL) developed concentrations even higher than CTRL (p .05). CRTL and PROC piglets reacted to the algometer at an average lower pressure than HAND (p =.03), differently to the other treatments that showed similar skin sensitivity to HAND (p >.05). No differences in glycaemia and behaviour were observed among treatments. The results suggest that using meloxicam alone might offer a promising option in reducing the expression of pain-related parameters in piglets after surgical castration, however, it appears more efficient when used alone than in association with the anaesthetic agents tested. Procaine administered alone and azaperone seems unsuited to the purpose considered.HIGHLIGHTS Meloxicam used alone is suggested for reducing the expression of pain-related parameters in piglets after surgical castration; When a protocol using procaine is used on the farm during piglets castration, the association with meloxicam reduces some pain-related indicators; Procaine administered alone and azaperone seems unsuited to manage pain after surgical castration of piglets

Assessment of myocardial extracellular volume on body computed tomography in breast cancer patients treated with anthracyclines

Background: Cancer treatment with anthracyclines may lead to an increased incidence of cardiac disease due to cardiotoxicity, as they may cause irreversible myocardial fibrosis. So far, the proposed methods for screening patients for cardiotoxicity have led to only limited success, while the analysis of myocardial extracellular volume (mECV) at cardiac magnetic resonance (CMR) has shown promising results, albeit requiring a dedicated exam. Recent studies have found strong correlations between mECV values obtained through computed tomography (CT), and those derived from CMR. Thus, our purpose was to evaluate the feasibility of estimating mECV on thoracic contrast-enhanced CT performed for staging or follow-up in breast cancer patients treated with anthracyclines, and, if feasible, to assess if a rise in mECV is associated with chemotherapy, and persistent over time. Methods: After ethics committee approval, female patients with breast cancer who had undergone at least 2 staging or follow-up CT examinations at our institution, one before and one shortly after the end of chemotherapy including anthracyclines were retrospectively evaluated. Patients without available haematocrit, with artefacts in CT images, or who had undergone radiation therapy of the left breast were excluded. Follow-up CT examinations at longer time intervals were also analysed, when available. mECV was calculated on scans obtained at 1, and 7 min after contrast injection. Results: Thirty-two female patients (aged 57\ub113 years) with pre-treatment haematocrit 38%\ub14%, and ejection fraction 64%\ub16% were analysed. Pre-treatment mECV was 27.0%\ub12.9% at 1 min, and 26.4%\ub13.8% at 7 min, similar to values reported for normal subjects in the literature. Post-treatment mECV (median interval: 89 days after treatment) was 31.1%\ub14.9%, and 30.0%\ub15.1%, respectively, values significantly higher than pre-treatment values at all times (P<0.005). mECV at follow-up (median interval: 135 days after post-treatment CT) was 31.0%\ub14.5%, and 27.7%\ub13.7%, respectively, without significant differences (P>0.548) when compared to post-treatment values. Conclusions: mECV values from contrast-enhanced CT scans could play a role in the assessment of myocardial condition in breast cancer patients undergoing anthracycline-based chemotherapy. CT-derived ECV could be an imaging biomarker for the monitoring of therapy-related cardiotoxicity, allowing for potential secondary prevention of cardiac damage, using data derived from an examination that could be already part of patients\u2019 clinical workflow

The Development of Sustainable Social Farming in Italy: A Case Studies Analysis

Social Farming (SF) is a rising practice that offers various typologies of initiatives involving different actors. Peculiarities consist of the types of networks organized at the territorial level and in the innovation processes they implement. In this study, through a cross-case analysis, we take into account six Italian social farms as case studies, interviewing them to understand the activities provided and their organization with the aim of highlighting both the strengths and the criticalities that may limit possible further development of Social Farming in Italy. The results of the analysis pointed out the specificities of the services offered by the social farms and the points of view of the farmers in the sector. Reflecting on these cases in light of the innovation system theory, it was possible to understand both the innovation system in which they developed and the enabling and the limiting aspects for Social Farming initiatives, as well as to codify useful lessons regarding the future organization of sustainable Social Farming services

A methodology for the customization of hinged ankle-foot orthoses based on in vivo helical axis calculation with 3D printed rigid shells

This study aims to develop techniques for ankle joint kinematics analysis using motion capture based on stereophotogrammetry. The scope is to design marker attachments on the skin for a most reliable identification of the instantaneous helical axis, to be targeted for the fabrication of customized hinged ankle-foot orthoses. These attachments should limit the effects of the experimental artifacts, in particular the soft-tissue motion artifact, which affect largely the accuracy of any in vivo ankle kinematics analysis. Motion analyses were carried out on two healthy subjects wearing customized rigid shells that were designed through 3D scans of the subjects’ lower limbs and fabricated by additive manufacturing. Starting from stereophotogrammetry data collected during walking and dorsi-plantarflexion motor tasks, the instantaneous and mean helical axes of ankle joint were calculated. The customized shells matched accurately the anatomy of the subjects and allowed for the definition of rigid marker clusters that improved the accuracy of in vivo kinematic analyses. The proposed methodology was able to differentiate between subjects and between the motor tasks analyzed. The observed position and dispersion of the axes were consistent with those reported in the literature. This methodology represents an effective tool for supporting the customization of hinged ankle-foot orthoses or other devices interacting with human joints functionality