the concept of fuzzy soft γ-ring is introduced; and some properties of fuzzy soft γ-rings are given. then the definitions of fuzzy soft γ-ideals are proposed and some of their theories are considered.

Natural rubber (cis-1,4-polyisoprene) is an isoprenoid compound produced exclusively in plants by the action of rubber transferase. Despite a keen interest in revealing the mechanisms of rubber chain elongation and chain length determination, the molecular nature of rubber transferase has not yet been identified. A recent report has revealed that a 24 kDa protein tightly associated with the sma...

Rubber is the most widespread smallholder tree crop in South-East Asia. Although initially large estates planted the bulk of the region’s rubber, smallholders soon captured most of the production. Currently, Indonesia’s rubber plantations cover 3.4 million ha, of which smallholders account for more than 75% (BPS, 1999). In peninsular Malaysia, the area in rubber has declined since the 1970s, bu...

Rubber dams are inflatable and deflatable hydraulic structures. Thousands of rubber dams have been installed worldwide for various purposes: irrigation, water supply, power generation, tidal barrier, flood control, environmental improvement, and recreation. Furthermore, rubber dams have been used in cold areas where the temperature is as low as –40°C. The simplicity and flexibility of the rubbe...

A non-atopic 74-year-old man complained of itching vesicular dermatitis on the left side of his thorax, which had flared up 8 days earlier, after a prolonged ECG monitoring. On inspection, many tense erythematous vesicular lesions, strictly arranged in a ring-shape, were observed at every site of application of the electrodes (Fig. 1). Due to the particular shape of the dermatitis a suction rea...

The leakage prediction calculation method for dynamic seal rings in underground equipment is presented this paper. framework of the given. model built. non-Newtonian fluid interface element brought in. was developed based on thermal–structural coupled and fluid–structural method. A test performed to validate proposed It proved that film thickness an O-ring made nitrile rubber pulling-in travel ...

In this study, ultrasound has been developed and applied for a rubber O-ring subjected to reciprocating sliding. Under varying speeds (2–8 Hz) normal loads (10–20 N), ultrasonic reflection from the sealing contact was measured analyzing oil film formation. Central thickness measurements were found be in range of 1.8–7 µm, which comparable modelling results. addition, along path using an array s...

Rubber dam is considered an ideal device for tooth isolation. Nevertheless, its usage is quite rare in the Czech Republic. The aim of this study was: firstly, to gather and evaluate information regarding the use of rubber dam by dentists in the Czech Republic and to compare it with other countries; secondly to find out whether there are any influencing factors as to rubber dam usage; and finall...

Dynamic balance has frequently been evaluated by using center of pressure (COP) during stepping movement. COP sway may be greater during stepping on foam rubber, which is a kind of external load. This study aimed to examine the effect of leg-joint angles and COP sway during stepping on a spot in 13 young male adults (mean age 25.6 ± 4.8 years, mean height 170.6 ± 5.2 cm, mean mass 69.1 ± 8.2 kg...

A prediction method for rubber curing process has historically received considerable attention in manufacturing process for rubber article with relatively large size. In recent years, there exists increasing demand for simulation driven design which will cut down the cost and time required for product development. In case of the rubber with relatively large dimensions, low thermal conductivity ...