Wyniki wyszukiwania - BazTech

1

Contracts’ Performance Measurement in Czech Construction Companies

Trtílek Petr, Hanák Tomáš

Civil and Environmental Engineering Reports

|

2021

|

Vol. 31, no. 4

214--236

EN

Performance measurement of construction contracts belongs to the crucial activities enabling the improvement of processes in a construction company. The main aim of this paper is to evaluate and analyse performance management practices applied by contractors in the Czech construction sector. Original data were collected using a questionnaire survey and quantified through relative frequency of occurrence. These data have been supplemented by interviews with experts in the field in order to assess the importance of the individual criteria and other relevant performance aspects. The main findings illustrate differences in approach with respect to company size, as well as the most frequently used performance indicators and criteria. The study also focused on the performance measurement of subcontractors and the factors influencing contract success. The results show that large companies have already developed elaborate measurement systems and have sufficient staff for this purpose. Companies in the Micro&Small category show worse measurement performance, mainly due to the lack of qualified staff.

2

Hybrydowe konstrukcje ze szkła

Lenk Peter

Świat Szkła

|

2019

|

R. 24, nr 3

10, 12--14, 16

3

Termokinetyczne aspekty prognozowania efektywności domieszek do betonu

Ciak M. J.

Budownictwo i Inżynieria Środowiska

|

2016

|

Vol. 7, no. 3

129--134

PL

Domieszki odgrywają znaczną rolę we współczesnej technologii betonu. Efektywne ich wykorzystanie jest jednak bardzo często utrudnione ze względu na złożony mechanizm oddziaływania na podstawowe stadia, takie jak: adsorpcja, rozpuszczanie, reakcje chemiczne i inne. Badania tych procesów jednoznacznie wskazują, że niezależnie od mechanizmów oddziaływania domieszek, wszystkie one wpływają na zmiany kinetyki przebiegu tych procesów, a tym samym na intensywność i wielkość efektów cieplnych. W oparciu o przeprowadzone badania opracowano podstawowe założenia i kryteria termokinetycznej oceny efektywności domieszek.

EN

Admixtures are significant in modern concrete technology. However, their effective use is very often difficult due to the complex mechanism of their influence on the main stages, such as: adsorption, dissolution, chemical reactions and others. The study of these processes clearly indicates that regardless of the admixture mechanisms of interactions, they all influence the kinetic course of these processes and thereby the intensity and magnitude of the thermal effects. Based on the studies the basic assumptions and criteria for assessing the effectiveness of thermokinetic admixtures have been developed.

4

Model of multimodal transport node functioning

Naumov V., Nagornyi I., Litvinova Y.

Archives of Transport

|

2015

|

Vol. 36, iss. 4

43--54

EN

To increase the efficiency of transport nodes functioning taking into account the logistics management principles it is necessary to optimize the structure and capacity of transport nodes' production resources, and to develop such a method for calculating of joint schedules for vehicles and freight hubs of the transport node, which takes into account stochastic nature of the parameters of material and informational flows. For solving the problems of optimal management of transport nodes functioning processes it is proposed to use the specific efficiency indicator, which is determined as a ratio of total costs of clients servicing in transport node to the costs of production resources used while servicing. According to the used approach for formalization of the transport node internal processes, development of the simulation model was implemented on the base of object-oriented programming principles. TransportNode.dll class library has been used as basic tool for simulations. The model implemented on the base of the library allows to take into account stochastic nature of demand and probabilistic nature of technological processes in transport nodes. Some results of numeric simulations for the loading area “Amur-Gavan” of Dnipropetrovsk River Port have been described in the paper.

5

Efektywność ekonomiczna wytwarzania ciepła z różnych paliw

Kardasz A.

Rynek Energii

|

2003

|

nr 3

18--22

PL

Efektywność ekonomiczna wytwarzania ciepła z różnych paliw jest aktualnym problemem przy podejmowaniu decyzji o budowie, przebudowie, rozbudowie lub wymianie źródeł ciepła. Odpowieć na pytanie, które paliwa powinny być preferowane ze względu na tę efektywność nie jest jednoznaczna. Dlatego starano się wskazać tok rozumowania, który pozwoli zbliżyć się do niej w każdym indiwidualnym przypadku stawiania tego pytania.

EN

Economic effectiveness of producing heat out of various kinds of fuel is a present-day problem at making decisions about building, rebuilding, development of heat sources. An answer to the question; which fuel should be preferred with regard to its effectiveness-is not simple. Therefore, the author makes an attempt to point out the course of reasoning that allows to approach it in every individual case when the mentioned question is asked.