จำนวน Repository ( 65 )

The study of quantum noise of four-wave mixing process of entangled photon generation within a nonlinear fiber optic ring resonator
The study of quantum noise of four-wave mixing process of entangled photon generation within a nonlinear fiber optic ring resonator

The three types of Hamiltonian describing photon-photon and photon-phonon interactions within an optical ring resonator in which quantum noise in fiber optics is generated are given. The Markov-Born approximation and +P representation of photon states in phase space are used in order to eliminate the reservoir state variables by substituting all into the master equation to get the coresponding Fokker-Planck equation. The corresponding Langevin equation describing evolution of quantum states of an entangled photon is analyzed. The optimum results show that the occuring quantum noise can be reduced from the three main parameters where the surviving polarized entangled photon can propagate in the fiber optic system for a long time until photon processings are attained.

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The effects of pulp and fiber crops that affect the printing surface through for packaging
The effects of pulp and fiber crops that affect the printing surface through for packaging

The study researches the effects of pulp and fiber crops that affect the printing surface through For packaging. The purpose of the study of plant fiber pulp.Compare the quality of the pulp fiber of plants that affect the printing surface throughThe data can be used in the design of appropriate packaging. And to compare the effects of the packaging structure of plant fiber pulp. Population and sample used in the study include the printing surface through Pulp and paper plants 5 types of equipment used in fiber research. The pulp and fiber crops. By manufacturers or those with knowledge of print. A uniform test. Clarity and completeness of the printing sector. Spec with a photometer in a satisfactory printing on pulp fibers through the plant by the manufacturers or those with knowledge of print. And the satisfaction of the pulp fiber packaging plant. By manufacturers or those with knowledge of the packaging. The research concluded that. Comparison of pulp fibers from plant samples 40 of them are featured on pulp paper suitable for printing in the most average of 4.6. The analysis compared the print quality of the pulp through a fiber plant. The test is simple and consistent. Clarity and completeness of the printing sector. The colors that appear on printed material including five kinds of color have always been smooth with differences not exceeding 5 shows the results in a value that can be seen as well. Comparison of satisfaction on the pulp paper and printing through the most appropriate. Is satisfactory in most average 4.65. Comparison of satisfaction packaging pulp paper plant fiber 5 and found that the packaging 1 and Type 3 are the scores remained level. The packaging is an average of 4.08 and packaging Type 3 has an average of 4.04. This research concluded that Pulp paper and print quality on the most appropriate.Is satisfactory in most The properties of the pulp. Print quality. As well as satisfaction with the quality printing. While pulp and pineapple pulp the elephant has a surface that is not strong. I withdrew the paper fibers of the time. Should improve the quality of pre-printed paper surface. While pulp and pulp of banana skin healthy grass.

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การใช้กากมะพร้าว ตันข้าวโพดและเปลือกทุเรียนเป็นวัสดุประกอบชีวภาพทดแทนไม้ในแผ่นใยอัดความหนาแน่นปานกลาง
การใช้กากมะพร้าว ตันข้าวโพดและเปลือกทุเรียนเป็นวัสดุประกอบชีวภาพทดแทนไม้ในแผ่นใยอัดความหนาแน่นปานกลาง

This research aims to study the application of coconut meal corn cob and durian peel as wood-substituted biocomposites in medium density fiberboard. The fiber: urea formaldehyde glue: isocyanate glue with polymeric diphenymethane diisocyanate type (pMDI) ratio is equal to 1: 0.13: 0.003. The fibers are taken from coconut meal corn cob and durian peel that 7 ratios are used to all of fiber mixing. The fiberboard production use 130°C of temperature with 20 – 50 kg/sq.cm of compressive pressure with 8 minutes per piece of rate. Their fiberboards have 603 – 856 kg/m of density that was tested follow the TIS 876-2547 standard. Resulting the MM33 ratio (coconut meal fibers: corn cob fibers: durian peel fibers is equal to 0.33: 0.33: 0.33) and the CC50 ratio (coconut meal fibers: corn cob fibers: durian peel fibers is equal to 0.50: 0.25: 0.25) can pass the standard in physical properties and mechanical properties. Moreover their fiberboards have good thermal insulation.

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การเตรียมผ้าไม่ทอจากใบอ้อย
การเตรียมผ้าไม่ทอจากใบอ้อย

This research was concerned with the fiber separation and non-woven preparation form sugar canes leaves. The separation process was carried out by chemical pulping method at 100 degree Celsius. In order to study the suitable condition for separation process the concentration of sodium hydroxide ranging from 0 -20 grams per liter and boiling time 15 30 45 60 75 90 105 and 120 minutes were performed. Web formation process was performed by wet laid method and polyvinyl alcohol was selected as binder in web bonding process. in order to study the suitable amount of binder in bonding process concentration of polyvinyl alcohol ranging from 1 2 4 6 8 and 10 % w/v coated on web surface and cured at 120 degree Celsius. Bursting strength as well as physical properties evaluation of non-woven fabrics was performed. For antimicrobial finishing process was performed by spray method and pad method. The finishing result was evaluated by MTCC test method 147-1998 (Qualitative) and 100 -1999 (Quantitative) The result was found that appropriate condition for fiber separation was recommended as follows: the amount of sodium hydroxide of 10 grams per liter and boiling time 60 minutes. The suitable amount of polyvinyl alcohol for web bonding process was 2 % w/v. Bursting strength of non-woven fabric was 53 kN/m 3 and padding method was a suitable method for antimicrobial finishing (antimicrobial area 0.3 millimeters )

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A Study Analysis of Fibers from Banana Trees in North Thailand for Product Creation
A Study Analysis of Fibers from Banana Trees in North Thailand for Product Creation

This research is the analytical study of fibers from banana trees in northern area. The study has been conducted on planted banana-species areas in 5 northern provinces. There are 9 studied banana species. The objectives of the studies are to utilize these mentioned banana species for product creation. It is also to find out the banana-fiber-extraction process for new materials used as guidelines to design new products which help generate extra revenue for farmers after harvest season. The result from the research indicates that the most appropriate species for the research is Musa acuminata Colla due to its strongest texture in term of thickness. The leftovers of banana (stalk and pseudo stem in dried form) after agricultural process have been extracted into straight fiber ropes. Then they are processed into straight fiber ropes through hand-cutting by northern villagers. As for the 5 types of natural fibers. It is found that banana fibers mixed with hemp fibers at 50% proportion for each yields the highest pull force of 678.71 N. To sum up the manufacturing production and creation is in a good level by average value 4.17 and the product users’ satisfactions is a good level by average value 4.07.

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