A method to define a minimum-phase transfer function within the bounded region of phase-gain specifications

Method to define minimum phase transfer function within bounded region of phase gain specifications at several discrete frequencie

A method to predict the thermal conductance of a bolted joint

Analytical method to predict interface thermal conductance of bolted joint

Welfare Losses from First-Come-First-Serve Course Enrollment: Outcome Estimation and Non-Market Maximization

College course enrollment operates as a market under supply cap. Because of the limited number of seats available for any given course some students who have a higher demand for a course are unable to enroll. The current registration system at the Claremont Colleges functions as a random draw system with added time costs. The lack of price signalling in the markets leads to a loss in overall welfare of the student body. By running data through simulated demand curves I am able to determine, on average, how much welfare is being lost by a random draw system. The percent of maximum welfare achieved compared to maximum possible ranges from forty-nine to eighty percent and largely depends on the proportion of enrolled students to the sum of enrolled + enroll requests as well as the demand function type. With price signalling, the student body would be able to reach the maximum achievable welfare

Counseling parents of retarded children

The purpose of this paper was to review available research, literature and observations concerning: 1. The importance of and the need for continuous counseling of parents of the retardate. 2. Techniques, methods and helpful hints used in different professions in counseling these parents. 3. The effect that parent counseling has on parental attitudes and on the growth and development of the child

The fate of nitrogen in the Marshland Upwelling System

The Marshland Upwelling System (MUS) is an alternative method for coastal dwellers to treat their wastewater. Past studies have dealt with the removal of fecal pathogens from wastewater. However the objectives of this research were to: 1) evaluate the treatment capability of the MUS under high hydraulic loadings and cool temperatures with respect to CBOD5, TKN, TAN, NO2--N, NO3--N, TP, and PO4-P, and 2) determine the ideal flowrate and injection frequency to achieve satisfactory nitrogen removal without hydraulic failure. The artificial wastewater study was performed to evaluate the treatment of CBOD5, TKN, TAN, TP, and PO4-P under high hydraulic loadings and cold temperatures. According to the pressure data, there were no signs of hydraulic dysfunction (clogging and/or channelization) during the study. CBOD5 was reduced from an influent value of 227 mg/l to an effluent value of 19 mg/l. TKN was reduced from 120 to 3 mg/l-N. The concentration of TAN was reduced from 110 to 1.5 mg/l. The influent TP and PO4-P concentrations were 14 and 7.2 mg/l-P, respectively. However, the effluent concentrations of TP and PO4-P were 0.3 and 0.7 mg/l-P. A flow rate of 2.8 L/min injecting for 30 minutes every 3 hours provided effective reduction of nitrogen. The concentrations of TKN in the influent were reduced from 168 to 1.8 mg/l-N. The influent TAN concentrations were reduced from 160 to 1.1 mg/l-N. Laboratory studies demonstrated the importance macrophytes have on the redox potential of the underlying media. By increasing the redox potential, the macrophytes also accelerated the production/reduction of NO2--N

Determinants of the onset of disability in old age

With a rapidly aging population, maximizing independent living among the elderly is a growing concern. The inability to perform normal basic care activities interferes with an older individual\u27s ability to live independently. In this study, I examine the onset of disability among elderly Americans using the 2002 and 2004 waves of the Health and Retirement Survey (HRS). In examining the explanatory power of both the life course perspective and the medical model, I find that the medical model is better able to explain onset of disability for males while the life course perspective prevails when explaining onset of disability among females. I find little support that living arrangements among the elderly have an impact on the probability of experiencing onset of disability. Finally, I find that differences exist in the precursors of individual activities of daily living (ADLs) disability, which suggests that using an aggregate measure of ADL disability may be masking more effective preventive measures and treatments

Softly falls the light of day

Wisps of heaven pushed the waves against the side of our canoe; traveling across lakes and forests, I guided the youngest of scouts through the emerald and sapphire pieces of Minnesota, the oldest Boy Scout in our group by two years. By the adults who accompanied us, I had been given lecture upon lecture about my status as a leader to the boys. We would canoe ten miles a day portaging our canoes over one mile landfalls; our strokes felt heavy but touched lightly upon the surface of the water and our spirits lifted into the clouds. Something happens to someone when they are thrown into the wilderness, willingly or unwillingly. Some people adapt to it, others push away an experience they believe irrelevant to their life, and some find a happiness never matched by any material possession in the world. A few people who find the middle of these things are pushed into a state of solitude and contemplation. In this small corner of the world you could not and would not ever complain of weakness, of being tired, nor show your deepest fear of not being strong enough