landscape fragmentation has threatened the landscape continuity of ray which was maintainedfrom prehistoric times until recent decades. from 19th century that tehran sprawl growth affected ray’slandscape as a satellite city of tehran, ray experienced rapid landscape fragmentation and underwent manychanges. in order to cope with the threat, the process of changes from landscape fragmentation sho...

This paper comprehensively reviews ten different delay element architectures for use in CMOS VLSI design. They can be categorized into three separate families: transmission gate based, cascaded inverter based, and voltage-controlled based. Six of these delay elements are already in use and we propose four new ones. We compare these delay elements, both analytically and using simulations, in ter...

In this paper, a sequential design method is proposed for analyses and designs of multivariable feedback control systems. The overall compensator is implemented systematiccally with a cascaded layer-wrapped structure and diagonal compensators. The method can take into consideration of stability, integrity, diagonal dominance and performance in a sequential manner. Roots of stability-equations a...

In this work, a novel signal processing method is proposed to assist the Receiver Autonomous Integrity Monitoring (RAIM) module used in a receiver of Global Navigation Satellite Systems (GNSS) to improve the integrity of the estimated position. The proposed technique represents an evolution of the Multipath Distance Detector (MPDD), thanks to the introduction of a Signal Quality Index (SQI), wh...

the astonishing advance of medical science in recent decades has had endless advantages for humans, including improved level of health, prevention of disease and advances in treatment. these advances depend to a great extent on conducting continuous research. however, besides its enormous advantages, the sole interest of medical science undermines the principles of respect for human vulnerabili...

the aim of this investigation was to assess the effect of different antioxidants on the motility andmembrane integrity of the ram semen during storage at 5ºc for 0, 12, 24, 48 and 72 hrs after collection anddilution. a total of 57 ejaculates from 12 bakhtiary rams was collected by artificial vagina and were extended1 : 3 with egg yolk-citrate buffer, which was containing one of the following an...

in this study, the relationship between components of knowledge management on the basis of m. mc olrvy model and social capital has been studied, statistical population consisted of employees of ministry of energy, who were selected among employees of hamedan regional power and were 420 subjects. research tool is a questionnaire and spss statistical software is used for data analysis and struct...