Wyniki wyszukiwania - Biblioteka Nauki

1

Multi-Criteria Evaluation and Ranking of Suppliers - Case Study Analysis

100%

Galińska B. , Rossi R.

Logistics and Transport

|

2018

|

tom Vol. 39, No. 3

21--30

EN

The article presents a coherent methodology of a multiple criteria evaluation of suppliers in furniture industry covering: the definition of a set of variants - laminated chipboards suppliers, the definition of a consistent family of criteria that allows for their comprehensive evaluation, modelling of decision maker’s (DM’s) preferences (including: the definition of the importance of criteria and the DM’s sensitivity towards changes of criteria values), and finally computational experiments resulting in the final ranking of suppliers. Six suppliers have been taken into consideration. In the family of criteria evaluating the suppliers, 9 measures have been taken into account. These have included, among others: product price, product quality, timeliness and reliability of delivery or cost of delivery. In the computational phase a selected MCDM/A ranking method which is Electre III/IV has been applied.

2

Hot Steam Transfer Through Heat Protective Clothing Layers

80%

Rossi R. , Indelicato E. , Bolli W.

International Journal of Occupational Safety and Ergonomics

|

2004

|

tom Vol. 10, No. 3

239--245

EN

The aim of this study was to analyse the transfer of steam through different types of textile layers as a function of sample parameters such as thickness and permeability. In order to simulate the human body, a cylinder releasing defined amounts of moisture was also used. The influence of sweating on heat and mass transfer was assessed. The results show that in general impermeable materials offer better protection against hot steam than semi-permeable ones. The transfer of steam depended on the water vapour permeability of the samples, but also on their thermal insulation and their thickness. Increasing the thickness of the samples with a spacer gave a larger increase in protection with the impermeable samples compared to semi-permeable materials. Measurements with pre-wetted samples showed a reduction in steam protection in any case. On the other hand, the measurements with a sweating cylinder showed a beneficial effect of sweating.

3

Glycopattern analysis and structure of the egg extra-cellular matrix in the Apennine yellow-bellied toad, Bombina pachypus (Anura: Bombinatoridae)

80%

Scillitani G. , Moramarco A. M. , Rossi R. , Mastrodonato M.

|

nr 2

4

Electrical resistivity tomography to delineate greenhouse soil variability

80%

Rossi R. , Amato M. , Bitella G. , Bochicchio R.

International Agrophysics

|

2013

|

tom 27

|

nr 2

EN

Appropriate management of soil spatial variability is an important tool for optimizing farming inputs, with the result of yield increase and reduction of the environmental impact in field crops. Under greenhouses, several factors such as non-uniform irrigation and localized soil compaction can severely affect yield and quality. Additionally, if soil spatial variability is not taken into account, yield deficiencies are often compensated by extra-volumes of crop inputs; as a result, over-irrigation and overfertilization in some parts of the field may occur. Technology for spatially sound management of greenhouse crops is therefore needed to increase yield and quality and to address sustainability. In this experiment, 2D-electrical resistivity tomography was used as an exploratory tool to characterize greenhouse soil variability and its relations to wild rocket yield. Soil resistivity well matched biomass variation (R2=0.70), and was linked to differences in soil bulk density (R2=0.90), and clay content (R2=0.77). Electrical resistivity tomography shows a great potential in horticulture where there is a growing demand of sustainability coupled with the necessity of stabilizing yield and product quality.

5

Two different forms and levels of CuSO4 in piglet feeding: liver, plasma and faeces copper status

70%

Pastorelli G. , Rossi R. , Zanardi E. , Ghidini S. , Corino C.

Journal of Animal and Feed Sciences

|

2014

|

tom 23

|

nr 1

EN

A 35-d experiment involving 150 crossbred pigs weaned at 26 ± 2 d of age was conducted to evaluate the effect of different forms of CuSO4 on the copper content of liver, plasma and faeces. Piglets were randomly allocated to five dietary groups with increasing supplementation of protected and unprotected Cu in the diet as follows: 0 ppm (CON), 75 ppm Cu unprotected (Cu 75UNP), 75 ppm protected (Cu 75P ), 150 ppm unprotected (Cu 150UNP) and 150 ppm protected (Cu 150P ). After 18 days of the experimental trial, 30 piglets were sacrificed to determine liver and plasma copper status. Faecal samples were taken for determination of copper content at the end of the whole experimental trial on the 35th day. The highest liver Cu concentration (P < 0.001) was found in Cu 150UNP compared with all other groups. The plasma Cu concentration showed a significant (P < 0.05) increase in the Cu 150P vs CON group. Groups Cu 150, either in the protected or unprotected form, showed a higher content in faeces compared with the CON and Cu 75 groups. The protection did not negatively influence bioavailability at Cu 75 ppm integration.

6

Analysis of the melting, burning and flame spread of polymers with the particle finite element method

70%

Oñate E. , Marti J. , Ryzhakov P. , Rossi R. , Idelsohn S. R.

Computer Assisted Methods in Engineering and Science

|

2013

|

tom Vol. 20, no. 3

165--184

EN

A computational procedure for analysis of the melting, burning and flame spread of polymers under fire conditions is presented. The method, termed particle finite element method (PFEM), combines concepts from particle-based techniques with those of the standard finite element method (FEM). The key feature of the PFEM is the use of an updated Lagrangian description to model the motion of nodes (particles) in the thermoplastic material. Nodes are viewed as material points which can freely move and even separate from the main analysis domain representing, for instance, the effect of melting and dripping of polymer particles. A mesh connects the nodes defining the discretized domain where the governing equations are solved using the FEM. An incremental iterative scheme for the solution of the nonlinear transient coupled thermal-flow problem, including radiation, loss of mass by gasification and combustion is used. Examples of the possibilities of the PFEM for the modelling and simulation of the melting, burning and flame spread of polymers under different fire conditions are described.

7

Organic selenium supplementation improves growth parameters, immune and antioxidant status of newly received beef cattle

51%

Sgoifo Rossi C. A. , Compiani R. , Baldi G. , Muraro M. , Marden J. P. , Rossi R. , Pastorelli G. , Corino C. , Dell’Orto V.

Journal of Animal and Feed Sciences

|

2017

|

tom 26

|

nr 2

EN

The effects of dietary supplementation with selenium enriched yeast on growth, immune and antioxidant status were assessed on 228 newly received beef cattle. During the adaptation phase (54 days), the animals were housed in 38 pens (19 pens per treatment) and supplemented with 0.32 mg · kg−1 DM of Se as sodium selenite (CTR) or selenium enriched yeast (SeY). At days 0, 19 and 54 the animals were weighed and blood samples were collected from one healthy animal per pen. During the experimental trial, bovine respiratory disease (BRD) occurrence was monitored. Blood antioxidant status, selenium serum concentration, bovine herpesvirus-1 (BHV-1) antibody titer and serum bactericidal activity were determined. Growth performance was improved (P < 0.05) and BRD occurrence was reduced (P = 0.06) in SeY group. SeY supplementation increased BHV-1 antibody titre after vaccination, highlighting a positive impact of SeY supplementation on immune system functioning. SeY supplementation improved (P < 0.01) selenium serum concentration and positively affected antioxidant status, expressed as Kit Radicaux Libres value, that tended to be higher (P = 0.07) in SeY group, due to Se higher bioavailability. The obtained results suggest that dietary supplementation with organic form of selenium improves growth performance, immune and antioxidant status in newly received beef cattle

8

Dietary supplementation with natural extracts mixture: effects on reproductive performances, blood biochemical and antioxidant parameters in rabbit does

51%

Vizzarri F. , Chiapparini S. , Corino C. , Casamassima D. , Palazzo M. , Parkanyi V. , Ondruska L. , Rossi R.

Annals of Animal Science

|

2020

|

tom 20

|

nr 2

9

Dry and Wet Heat Transfer Through Clothing Dependent on the Clothing Properties Under Cold Conditions

51%

Richards M. G. M. , Rossi R. , Meinander H. , Broede P. , Candas V. , Hartog den E. , Holmer I. , Nocker W. , Havenith G.

International Journal of Occupational Safety and Ergonomics

|

2008

|

tom Vol. 14, No. 1

69--76

EN

The purpose of this study was to investigate the effect of moisture on the heat transfer through clothing in relation to the water vapour resistance, type of underwear, location of the moisture and climate. This forms part of the work performed for work package 2 of the European Union THERMPROTECT project. Thermal manikin results of dry and wet heat loss are presented from different laboratories for a range of 2-layer clothing with similar dry insulations but different water vapour permeabilities and absorptive properties. The results obtained from the different manikins are generally consistent with one another. For each climate, total wet heat loss is predominately dependent on the permeability of the outer layer. At 10 °C, the apparent evaporative heat loss is markedly higher than expected from evaporation alone (measured at 34 °C), which is attributed to condensation within the clothing and to increased conductivity of the wet clothing layers.