Modelling And Development Of An Improved Sorting System In The Plywood Grading Line

The main focus of this study is on the sorting method of graded plywood in the grading line. The plywood grading line is the final process in the production line. Due to the inefficiency of the sorting method, this line has low productivity, high labor usage and defectives due to improper sorting of the plywood by the operator. The collected statistics were analyzed and the output analysis deals with drawing the comparison between the existing grading line and the built model. This study has eight aspects measured in order to achieve the objectives. They are; time study, production rate, labor cost, labor productivity, capacity utilization, defective rate, investment cost and downtime. Overall comparison for sorting graded plywood between existing system and proposed systems (pneumatic and hydraulic systems), shows that, the sorting time was reduced to 20.3% using pneumatic sorting system whereas 10.9 % using hydraulic sorting system. Hence increasing the production rate by 38.9% and 32.5% accordingly

Model Production System for Laminated Wood Products

The purpose of this research was to investigate and experiment with the use of a designed model production system in comparison to a traditional system. It was the intent of this study to develop an efficient model production system for producing laminated wood products. This research included: (l) review of the literature pertinent to wood lamination, (2) survey of companies and individuals involved with wood lamination, (3) design and testing of a model lamination system, and (4) comparison of the designed system to the traditional method of laminating a wood product The variables and procedures relating to wood lamination were identified through the review of literature and returned surveys. The variables and procedures deemed important were used to design the schematic, mathematical, and physical models of a lamination system. The designed model system was compared to the traditional method of producing a laminated wood product. This was done through a comparison of production times, process charts, process layout diagrams, and cost analysis The primary conclusions obtained from this study were: (1) the designed model layout resulted in less material movement than the traditional layout, (2) the designed model process required fewer production activities than the traditional process, (3) the designed model process required less production time than the traditional method, (4) the designed model proved to be more economical in producing the same quantity of products than the traditional method, and (5) the quality of the laminated wood product proved higher using the designed model system in comparison to the traditional method It is recommended that: (1) a designed layout be used in lamination production runs, (2) a designed process should be incorporated in lamination production runs, (3) break-even analysis should be used to compare the economics of two production methods, and (4) models should be used to compare two or more competing system

New Solut

Pneumatic nail guns are ubiquitous at residential construction sites across the United States. These tools are noted for the traumatic injuries that can occur from their operation. Different trigger mechanisms on these tools are associated with different levels of risk. Residential building subcontractors and workers, both native-born and immigrant, were brought together in focus groups to discuss their attitudes and beliefs regarding risk factors for nail gun injury as well as barriers to the adoption of safer technology. Participants' comments are organized first by influences on traumatic injury occurrence or prevention and later by sociotechnical system category. Participants attributed influences on injury risk to personal and external causation factors in all sociotechnical system categories; however, participants more frequently described influences on injury prevention as related to workers' behaviors, rather than to external factors. A discussion of these influences with respect to attribution theory and sociotechnical models of injury causation is presented.CC999999/Intramural CDC HHS/United States2015-11-20T00:00:00Z24704813PMC465372

Water supply for country homes

"June, 1910.""Reprinted, October, 1913.

"Product Complexity and Economic Development"

We rank 5,107 products and 124 countries according to the Hidalgo and Hausmann (2009) measures of complexity. We find that: (1) the most complex products are in machinery, chemicals, and metals, while the least complex products are raw materials and commodities, wood, textiles, and agricultural products; (2) the most complex economies in the world are Japan, Germany, and Sweden, and the least complex, Cambodia, Papua New Guinea, and Nigeria; (3) the major exporters of the more complex products are the high-income countries, while the major exporters of the less complex products are the low-income countries; and (4) export shares of the more complex products increase with income, while export shares of the less complex products decrease with income. Finally, we relate the measure of product complexity with the concept of Complex Products and Systems, and find a high degree of conformity between them.Capabilities; Development; Economic Complexity; Diversification; Method of Reflections; Product Complexity; Ubiquity

Home Depot Foundation - 2006 Annual Report

Contains CEO's message, program information, grantee profiles, corporate donors list, grant list, and list of board members and staff

Volume 73 - Issue 1 - October, 1961

https://scholar.rose-hulman.edu/technic/1050/thumbnail.jp

Pultruded Textile Reinforced Concrete Structural Sections

abstract: Pultrusion manufacturing technique stands at the forefront for efficient production of continuous, uniform concrete composites for use in large scale structural applications. High volume and low labor, among other benefits such as improved impregnation and better sample consistency, stand as some of the crucial advances found in automated pultrusion. These advantages introduce textile reinforced concrete (TRC) composites as a potential surrogate for wood, light gauge steel, and other common structural materials into an ever changing and broadening market of industrial grade structural sections. With the potential modifications of textile geometry, textile type, section geometry, and connection type, the options presented by TRC sections seem nearly boundless. Automated pultrusion presents the ability to manufacture many different TRC composite types in at a quickened rate opening up a new field of study of structural materials. The objective of this study centered on two studies including the development of an automated pultrusion system for the manufacturing of TRC composites and ultimately the assessment of composites created with the pultrusion technique and their viability as a relevant structural construction material. Upon planning, fabrication, and continued use of an automated pultrusion system in Arizona State University’s Structures Lab, an initial, comparative study of polypropylene microfiber composites was conducted to assess fiber reinforced concrete composites, manufactured with Filament Winding Technique, and textile reinforced concrete composites, manufactured with Automated Pultrusion Technique, in tensile and flexural mechanical response at similar reinforcement dosages. A secondary study was then conducted to measure the mechanical behavior of carbon, polypropylene, and alkali-resistant glass TRC composites and explore the response of full scale TRC structural shapes, including angle and channel sections. Finally, a study was conducted on the connection type for large scale TRC composite structural sections in tension and compression testing.Dissertation/ThesisMasters Thesis Civil Engineering 201