1,999 research outputs found
Using Teacher Observation for Diagnosing Reading Problems
This article discusses the values of using teacher observation as a diagnostic technique and illustrates how a teacher can be more effective in the diagnosis of reading problems. The article discusses using cumulative records and several different types of checklists as useful aids to teacher observation. Some of the checklists discussed are extremely valuable in locating a child\u27s specific reading difficulties, but are not widely known by many elementary teachers
Is She Chinese or American? On the Identity Communication Patterns between Caucasian Parents and their Adopted Chinese Daughters in the U.S.
This study explored patterns of identity communication between Caucasian parents and their adopted Chinese daughters. As they grow up in biracial and bicultural families, adoptees must integrate multiple identities of being ethnically Chinese, culturally American, female, abandoned, and adopted. Using qualitative methods, the researchers conducted 1-1 ½ hour in-depth interviews of adoptive parents to identify communication patterns and strategies used to create and manage the bicultural identities of their Chinese daughters
AN EVALUATION OF THE 1981 FARM PROGRAM FOR CROPS: IMPLICATIONS FOR THE 1985 FARM BILL
Agricultural and Food Policy,
Electrical Thermometers for Aircraft
Electrical thermometers commonly used on aircraft are the thermoelectric type for measuring engine-cylinder temperatures, the resistance type for measuring air temperatures, and the superheat meters of thermoelectric and resistance types for use on airships. These instruments are described and their advantages and disadvantages enumerated. Methods of testing these instruments and the performance to be expected from each are discussed. The field testing of engine-cylinder thermometers is treated in detail
Carbon-monoxide Indicators for Aircraft
Several improvements that have been made on commercially available carbon-monoxide indicators to make them more suitable for aircraft use are described. These improvements include an automatic flow regulator, which permits the use of a simplified instrument on aircraft where a source of suction is available, and a more reliable alarm attachment. A field method for testing instruments on standard samples of carbon monoxide is described. Performance data and instructions in operation and maintenance are given
Dynamic Characteristics of a Small Skyline Logging System with a Guyed Tailspar
A series of dynamic loading tests were conducted on a small skyline logging system (15.8 mm [5/8 inch] skyline) operating in a second-growth Douglas fir stand. The tests included free vibration tests and logging tests with turns weighing from 1.5 to 9 kN [340 to 2050 lbs]. Natural frequency and damping were evaluated from free vibration tests, and the free vibration portion of logging tests. Dynamic load magnitude was evaluated for logging tests with natural and artificial breakouts of turns with a range in turn weights, and for a series of logging tests with the same turn. The natural frequencies of the guylines were in good agreement with simple cable theory. However, the presence of the carriage on the skyline resulted in measured natural frequencies significantly lower than simple cable theory would predict. Damping of the tailspar system and the skyline averaged about 10% of critical damping, but was highly variable from test to test. Dynamic load magnitude, whether expressed as the load peak produced by turn break-out, or the maximum cyclic load, was highly variable, with coefficients of variation ranging from 31 to 79%.
Even a series of logging tests with the same two-log turn produced maximum cyclic loads with a coefficient of variation of nearly 40%
Computer Model for Dynamic Skyline Behaviour
The development and experimental verification of a numerical model for the dynamic behavior of a cable logging system skyline is discussed. The model is intended to simulate the skyline behavior after a turn of logs breaks out of a "hang-up" on the ground. Output from the model may be used as a forcing function for a dynamic load on the tailspar or other component of the cable logging system.
The numerical model uses finite difference and Runge-Kutta techniques. Output from the model consists of time-histories of the fluctuations in skyline tensions. From this output the frequencies of the skyline vibrations may be determined. The model was verified by experimental data collected while operating a small cable logging system in Oregon State University's McDonald Research Forest
Atomic-scale tailoring of spin susceptibility via non-magnetic spin-orbit impurities
Following the discovery of topological insulators, there has been a renewed interest in superconducting systems that have strong spin-orbit (SO) coupling. Here we address the fundamental question of how the spin properties of a otherwise spin-singlet superconducting ground state evolve with increasing SO impurity density. We have mapped out the Zeeman critical field phase diagram of superconducting Al films that were deposited over random Pb cluster arrays of varying density. These phase diagrams give a direct measure of the Fermi liquid spin renormalization, as well as the spin orbit scattering rate. We find that the spin renormalization is a linear function of the average Pb cluster -to- cluster separation and that this dependency can be used to tune the spin susceptibility of the Al over a surprisingly wide range from 0.8χ0 to 4.0χ0, where χ0 is the non-interacting Pauli susceptibility
Briefing Paper on the Demand for U.S. Commodity Exports and the Mississippi River: Past and Future
As part of the decision in evaluating the lock and dam upgrade on the Mississippi River, the U.S. Army Corps of Engineers (Corps) has contracted with various agricultural forecasting companies (most recently Sparks Companies, Inc.) to produce long range projections of agricultural exports and the implied demand for Mississippi River transportation services. The future demand for barge transportation services is a key component in evaluating the value of lock and dam upgrades. In this context, it is important to understand the volume of U.S. exports that utilize the river versus other modes of transportation
Towards eco-efficient lean production systems
Lean Production has proved itself a worthwhile production strategy in many
distinct industries across all regions of the planet by achieving higher levels of
production efficiency. Several authors identified that Lean inadvertently has
had significant environmental gains. Such achievements are considered of
special relevance in a global and highly competitive economy which is
progressively both tied-up and driven by an environmental agenda. The main
goal of the present study is to enlighten the contribution of Lean for achieving
a better environmental performance of production systems and identify this as
an emergent business model for supporting eco-efficiency
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