The purpose of this qualitative study was to investigate
the thought processes of secondary level novice programmers
engaged in computer programming for the purpose of
generating hypotheses for consideration in future research
on the relationship between computer programming and problem
solving. A high school BASIC programming course with
14 students...
At its peak, Oregon produced 21 percent of the nation's
total commercial strawberry production. However, since
1971, Oregon's share of strawberry production has been
declining steadily. In fact, for the last three years
strawberry production in Oregon constitutes only 8 percent
of the nation's total production, which is the lowest...
Experiments were done to determine pathogenic variability
and pathogenic adaptation of Septoria tritici to different
wheat cultivars. Fifteen S. tritici isolates from
California, Oregon, and Texas were evaluated on seedlings of
two sets of geographically diverse wheat cultivars under
greenhouse conditions. Significant isolate effects, cultivar
effects, and isolate X cultivar...
Role of temperature and photoperiod on development of the filbert leafroller, Archips rosanus L., (Lepidoptera: Tortricidae) from the Willamette Valley, Oregon was studied in the laboratory and in the field. Both temperature and photoperiod had a significant influence on the developmental rate of this species from neonate larva to adult...
Cranberries are processed mainly for the production of jelly,
sauce and juice. The content of pectic substances in the cranberry
gives the fruit a desirable property for processing such products.
Pectic enzymes which catalyze the hydrolysis of pectic substances
may affect the consistency of these products.
The concern of this...
By studying the linker histone/DNA complex in vitro, our goal was to
gain further insight into the interaction of these histones in chromatin structure,
which, in turn, helps us in better understanding critical biological processes such
as replication, transcription, and recombination. In direct competition
experiments, we have confirmed previous results...
This contribution employs a „fish chain‟ approach or ocean to plate analysis to examine key market drivers affecting Northern Gulf cod fisheries recovery since their collapse in the early 1990s. Drawing upon the backward bending supply model of fisheries; secondary data was compiled and analyzed for the pre- and post-collapse...
This is an interactive, self explanatory computer
program on real roots of polynomials with real
coefficients. This program called POLYROOT has the double
feature of tutoring and problem solving. It allows the user
to enter on one line any polynomial with real coefficients.
Then, the user can find :
1....
A complete analytical model of radiative and convective heat
transfer to a horizontal tube in small and large particle gas fluidized
beds has been developed. In the model the bed of particles
consists of an emulsion phase and a bubble phase. The emulsion phase
is approximated by a series of...
The potassium status of selected soils from central and eastern Oregon, that have shown a wide range in response from potassium was investigated. The silt and clay minerals were identified using X-ray crystallography. The potassium extracted by water, NH₄OAc, and HNO₃ was evaluated on the total soil and on the...
Pasteurization radiation offers a new means of extending the
refrigerated storage life of foods. This procedure avoids many of
the undesirable changes which result when sterilization radiation is
used and still eliminates most of the spoilage organisms.
Shrimp was treated with 5 ppm chlortetracycline and subjected
to pasteurization levels of...
The properties of linear active coupled lines consisting of
electrically long GaAs MESFET structures are investigated for possible
applications as traveling-wave broad-band amplifiers. In addition,
the nonlinear coupled Schottky lines are studied for applications as
voltage tunable circuit elements.
The analysis of the general active asymmetric coupled transmission
lines in...
This thesis describes evaluation of a gastric retention device (GRD) developed at Oregon State University. The device was originally fabricated from Xanthan gum and Locust bean gum. A modified gastric retention device containing other additives was developed and investigated in this work. The modified device was evaluated in vitro for...
This paper examines the roles of non-Government Organizations (NGOs) in improving the status of open water fisheries resources in Bangladesh. NGOs are traditionally involved mostly in micro-credit operations as they are highly experienced and skilled in this area, but they have not been working for improving the natural resources management...
Progenies of two bean crosses were studied for inheritance of resistance to dry root rot caused by Fusarium solani f. phaseoli. O.S.C. 22 (P. vulgaris) was used in both crosses as the susceptible parent. A Mexican line (P. vulgaris) and a line 2014 of the runner bean (P. coccineus) were...
Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko),
is a widely distributed species in western north America,
and a major economic pest of wheat (Triticum aestivum L.)
and barley (Hordeum vulgare L.). The objectives of this
study were to : 1) determine the inheritance of seedling and
adult plant resistances in...
Fifty species and subspecies and six varieties in eight genera of
the family Tabanidae are recognized from Oregon. The following genera
are represented in Oregon: Apatolestes Williston, Pilimas Brennan,
Stonemyia Brennan, Silvius Meigen, Chrysops Meigen, Atylotus Osten
Sacken, Hybomitra Enderlein and Tabanus Linnaeus. Adults and larvae
were collected from various...
The preparation of holocellulose accurately and rapidly is very
important to study the nature and relationships of the carbohydrate
components and the substituent groups, acetyl, carboxyl, and methoxyl.
In as much as bromine was thought to be less destructive to
wood than chlorine, it was decided to attempt to isolate...
This study involves the development of a biofilm
reactor that supports growth of a deep biofilm on a gas
permeable membrane. The reactor solution is not aerated,
and oxygen is supplied through the membrane. The reactor
is termed a substratum-aerated-biofilm reactor or SAB.
With adequate concentrations of electron-donors and
electron-acceptors,...
Recent trends in global fish production, consumption and trade reflect several fundamental shifts in the structure of supply of and demand for fish and seafood. Rapid changes in world demand for fish is first discussed. Six panelists discuss the issues derived from considering fisheries—with particular emphasis on aquaculture—as a major...
A study was conducted to understand current practices of commercially important marine fish marketing systems in the Patuakhali area of southern Bangladesh. A total of ten commercially important marine fish were identified such as: 1) hilsa, 2) pomfret, 3) marine catfish, 4) tuna, 5) coral fish, 6) marine eel, 7)...
A study was conducted during 1974 and 1975 to evaluate the impact
of stocking intensity and season of grazing upon carbohydrate
concentration, biomass of storage organs, and total carbohydrate per
plant in the roots and crowns of perennial ryegrass (Lolium perenne L.)
in improved rangelands in Western Oregon. The stocking...
The over-tenderization of irradiated-sterilized meat is one
of the more important adverse effects resulting from the use of
irradiation for the preservation of meat. Although research has
been reported on the activity and effect of the inherent proteolytic
enzymes of irradiated meat, very little work has been directed toward
the...
The paper presents a detailed approach to modeling supply and demand of the Asian fish sector. It discusses the salient features of the fish sector in Asian countries that need to be incorporated in a comprehensive model of fish supply and demand, as well as the usefulness of supply and...
In many of the developing countries fish export is a significant source of foreign exchange earning that helps to stabilize macroeconomic indicators and provides nutrition and food security to the poor people of these countries. However, performance of fish export of these countries depend on, among other things, continued access...
Lake Nasser extends for more than 300 km inside Egypt`s border and has an extensive shoreline of around 7000 km. It is an important source of fish for residents of Aswan and adjacent governorates in Upper Egypt, representing 55% of the total production from inland lakes in Egypt in 2013....
L'objectif majeur de cette étude est de fournir les instruments de base en mesure d'aider à une meilleure gestion des sites récréatifs au Maroc en conformité avec les exigences des utilisateurs, mais aussi en relation avec les considérations publiques liées à l'offre en récréation, à l'activité de l'aquaculture et à...
The incorporation of fisheries commodities into the International Food Policy Research Institute’s (IFPRI) International Model for Policy Analysis of Agricultural Commodities and Trade (IMPACT) model suggests that demand for fisheries products will rise faster than supply over the next two decades, and that fishery commodity prices will rise relative to...
The new world trading order has introduced major liberalization initiatives for developing country fish producers. It has on the other hand raised non-tariff barriers, such as food safety standards. Non-tariff barriers will profoundly shape the sharing of benefits and costs of rising global fish trade. The potential impacts of these...
Published June 1979. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published December 1974. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Climate change and climate-induced changes are expected to increase in the future and are likely to cause adverse impacts, especially on aquatic resources and coastal communities, by affecting the productivity and distribution of fish stocks. This will have serious implications on future demand and supply of fish at the global...
Mutation analysis is a well-known method for measuring the quality of test suites. However, it is computationally intensive compared to other measures, which makes it hard to use in practice. Choosing a smaller subset of mutations to run is a simple approach that can alleviate this problem. Mutation operator selection...
There has been a structural shift in the global supply, demand and trade in fish and fisheries products since the early 1980s that has shattered the traditional dominance of the developed nations. Despite a declining trend in the global exports of primary products, the percentage contribution of fish has been...
Current fisheries management approaches based on centralised government intervention have proven inadequate to deal with the present management and cannot meet its objectives including reverting stock depletion, resolving user group conflicts, increase profitability and prevent social disruption. There is no easy solution to this problem. New institutions enabling fishing communities...