The objective of this research is to propose and investigate a new design of the Cylindrical Automated Storage and Retrieval System (C-AS/RS) and provide a performance comparison of the two types of Storage/Retrieval Mechanisms (SRM I and SRM II) for the system configurations with different input/output location numbers and positions. Although the better performance is expected from of the system with SRM II, because it contains the vertically independent moving load handling devices (LHDs) compared to the interconnected LHDs used in SRM I, the vertically independent movement requires more sophisticated equipment which should be considered by the system designers. Hence, the performance investigation is required to identify the differences between the two types of the SRMs for different C-AS/RS configurations. For this purpose, the detailed simulation model of the C-AS/RS was developed, investigated for various combinations of system parameters and the multiple regression models for predicting system performance measures were developed (adjusted R-square greater than 0.83 for all models). The differences of the performance measures were evaluated and showed that SRM II achieved 7÷20% higher load retrieval rates compared to SRM I for all investigated parameter combinations. The investigation also showed that the number and position of the input/output locations had a significant impact on the system performance. Keywords: cylindrical automated storage and retrieval system, order picking system, automated warehouse, simulation, regression analysis. Reference to this paper should be made as follows: Janilionis, V.; Bazaras, Ž. 2013. The design and investigation of two storage/retrieval mechanisms of the cylindrical automated storage and retrieval system, Transport 28(4): 352-360. http://dx.

InTernaTIonal JoUrnal of sTraTeGIC ProPerTy manaGemenT Issn 1648-715X print / Issn 1648-9179 online 2011 Volume 15(4): 393-415 http://dx.ABstrACt. The built heritage began to be seen not only as a real estate property and an object of cultural value but also as a multifaceted and multidimensional cultural good in the second half of the 20 th century. It has increasingly attracted the interests of economists, who attempted to measure not only its economic impact, but also the total economic value. The spectrum of the categories of the economic value of the built heritage and the valuation methods applied has expanded in the course of time. Currently it encompasses market and nonmarket economic values and numerous valuation techniques based on the stated and revealed data, including the Contingent Valuation method (CVm). The number of contingent valuation (CV) studies aimed at valuing the non-market benefits of the built heritage in developed and developing countries is growing. However, the post-communist transition countries are quite an exception. The applications of the CVm in the developing countries have demonstrated that the sociocultural context must be taken into account and the special measures must be applied in order to get the reliable results. This sensitivity of the CVm to the sociocultural context encourages analyzing the peculiarities of its application in the post-communist transition countries. The main aim of the article is to determine the peculiarities of the social environment of the post-communist transition countries and their possible influence on the CV results. The findings of the research can be useful not only to the fields of CV survey design and benefit transfer, but also to the broad and rapidly developing field of the post-communist studies, for the better understanding the hidden values and potential of the built heritage properties, and the sustainable management of the built environment.

The objective of this research is to propose new routing algorithms for the Storage and Retrieval Mechanism (SRM) in the Cylindrical Automated Storage and Retrieval System (C-AS/RS) and contribute to the system conceptualization by investigating the maximum achievable retrieval request rates for different routing algorithms and system parameters. For this purpose, flexible and detailed simulation model was developed and investigated for 2 SRM types, 3 routing algorithms and a feasible set of system movement and load transfer time parameters. Based on the simulation output, the regression models for different SRM types and routing algorithms were developed for predicting the maximum retrieval request rate. The differences of the average maximum retrieval request rate were evaluated for various system configurations and routing algorithms. The alternative to optimal routing algorithm was proposed, reducing the system performance only by 1.4÷2.4% on average, but requiring significantly less calculations when planning the SRM tour. In addition, the system analysis indicated that SRM vertical velocity and load transfer time have the highest impact on the system performance and for different SRM types the average maximum retrieval request rates differ by 22.2÷31.8%.

Pasaulyje ir Lietuvoje vyksta daug diskusijų, kaip COVID-19 pandemija pakeis ekonomikos vystymąsi, kuriuos sektorius ji palies stipriau, o kuriems tai bus finansinių rezultatų gerėjimo metas. Leidinyje įvairiais aspektais analizuojama problema – kaip įvertinti skirtingų šalies ekonominės veiklos sektorių finansinį atsparumą, nuostolius ir grynąjį ekonominį poveikį, sukeltą COVID-19 pandemijos. Taip pat aptartos rekomendacijos dėl ekonomikos skatinimo priemonių dydžio neigiamiems padariniams šalinti. Mokslo studija bus naudinga vyriausybės ir valdžios įstaigų vadovams, ekonomikos analitikams, ekspertams. Skaitytojai ras reikšmingų rekomendacijų, padėsiančių ekonomikai veikti ypatingo neapibrėžtumo sąlygomis.

During the period of 1980-2004, the mortality trend declined among women only. The period effect contains relevant information for the explanation of increasing mortality rates during 2000-4 among men and women. The Poisson regression models could be applied for the examination and explanation of the different causes of the population mortality.