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THE EFFECTIVENESS OF AN INTEREST-MOTIVATED METHOD OF INSTRUCTION IN REMEDIAL ENGLISH WAS EVALUATED. ALL STUDENTS INVOLVED IN THE PROJECT WERE PERSONS WHO HAD GRADUATED FROM HIGH SCHOOLS IN THE LOWER 40 PERCENT OF THEIR CLASSES. THEY WERE ADMITTED TO COLLEGE ON A PROBATIONARY BASIS. EIGHT GROUPS OF STUDENTS WERE INVOLVED. FOUR GROUPS WERE DESIGNATED AS EXPERIMENTAL, AND THEIR CLASS PROCEDURE FOLLOWED THE INTEREST-MOTIVATED METHOD OF INSTRUCTION. THE REMAINING GROUPS FOLLOWED A TRADITIONAL METHOD. THE COURSES RAN CONCURRENTLY AND COVERED TWO 15-WEEK SEMESTERS. THE PRIMARY STUDY MATERIALS EMPLOYED IN THE FOUR EXPERIMENTAL GROUPS WERE "NEWSWEEK" MAGAZINE AND SELECTED NEWSPAPERS. STUDENTS PRE- AND POST-EXPERIMENTAL ESSAYS WERE JUDGED ON THE ELEMENTS OF MECHANICS, ORGANIZATION, AND INTELLECTUAL CONTENT. ANALYSES OF VARIANCE WAS RUN ON THE SCORES. THE EXPERIMENTAL METHOD WAS NO MORE EFFECTIVE IN TEACHING THAN THE TRADITIONAL APPROACH. IT WAS CONCLUDED, ALSO, THAT REMEDIAL ENGLISH COURSES SHOULD BE OF NO GREATER DURATION THAN ONE SEMESTER. MEANINGFUL OBJECTIVE CRITERIA WERE DEVELOPED FOR SCORING STUDENT ESSAYS. (JC)

Small oscillations of a beam-column with finite electrical conductivity in a transverse magnetic field are examined. The frequency equation is derived for a beam-column. The effects of the magnetic field on the natural frequencies and the elastic stability of a conducting beam-column are investigated. Numerical results are presented which indicate that the effect of the dynamic electro-magnetic forces is negligible except at extremely high frequencies of vibration.

It is now possible to provide communications with high reliability factors in geographical areas which are resistant to the more conventional high-frequency radio. For the past two years, the US Air Force has been operating an ionospheric scatter system (FPIS) between Loring AFB, Maine, USA, and Thule AFB, Greenland. Relay stations in this system are located at Goose Bay, Labrador, Canada and Sondrestrom, Greenland. The US Air Force tropospheric scatter system (FPTS) has been in operation since May, 1955, along the Labrador coast in support of a chain of radar stations. Practical considerations in the application of either of these scatter systems include but are not limited to such factors as cost, reliability, channel capacity, geography, topography, path length, interference, manpower requirements (both as to skill and number) and logistics support. Although tropospheric and ionospheric scatter systems are linked in the similarity of nomenclature, the characteristics and practical considerations are quite different. Accordingly the FPIS and FPTS systems are discussed separately.

Mitosis in zoosporangia of the chytrid Phlyctochytrium irregulare is described from electron microscope observations and also from light microscope observations of both living and haematoxylin-stained thalli. At the onset of prophase the centriole complex replicates, and the complexes migrate to polar positions. The semi-persistent nucleolus is appressed to the nuclear envelope as the nuclear pockets invaginate, finally rupturing to create polar fenestrae, through which spindle microtubules penetrate the nucleus from the region of the centrioles at prometaphase. Metaphase chromosomes form an equatorial plate. Initial separation at anaphase seems to be accomplished mainly by shortening of chromosome-to-pole microtubules; additional anaphase and telophase separation is accomplished by elongation of the nucleus. A system of perinuclear endoplasmic reticulum is formed during prophase and is completed by metaphase. It persists during all division stages after its formation. Features of this mitotic apparatus are discussed with reference to earlier light microscope studies of chytrid mitosis. The ultrastructure of P. irregulare's mitotic apparatus is similar to that of certain unicellular green algae.

Published procedures for the operation and administration of the Naval Postgraduate School that are not otherwise established. Approved for public release; distribution is unlimited.

Uraniferous rock was discovered in the Phillips mine-Camp Smith area in 1953. Precambrian rocks of the Hudson Highlands of the New England physiographic province underlie the area.

Serial and individual micrographs of centrioles in developing sporangia of the aquatic phycomycete,Phlyctochytrium irregulare Koch, are presented. The A-C linker, the foot, and the hub of the cartwheel are composed of subunits morphologically similar to those of the triplet tubules. It is suggested that the A-C linker is a locus of microtubule nucleation, and as such, it forms the inner part of a microtubular profile located at the A-C linker. Similar profiles are seen on other parts of the triplet blades. Longitudinal sections of centrioles with spindle and astral microtubules emanating from their walls support the suggestion, and diagrammatic models for microtubule nucleation are presented. A stellate granule with ninefold rotational symmetry is present in the lumen of the cartwheel's hub. The hub shows thirteenfold rotational symmetry and is probably a microtubular structure. The possible role of these components in centriole replication is discussed.

Three sibling pairs of six-month old boars of each of four breeding groups (Yorkshire, Poland, China and the reciprocal crosses) were maintained in an area held at or below 21.5°C with a 12-hour daily light cycle. After a three month acclimation period, a randomly selected boar of each pair was subjected to 33°C, 50% RH for 72 hours. Semen was collected from each boar once during the treatment and every fourth day for 64 days post-treatment (PT). There were significant (p < 0.05) decreases in sperm concentration per ml, and total sperm number. The inverse of the methylene blue reduction time and the per cent motile sperm and total motile sperm in the ejaculate were significantly decreased (p < 0.01). The percentages of primary and secondary morphologically abnormal spermatozoa were increased significantly (p < 0.01). Maximal pair differences occurred at days 28 to 32 PT; all had returned to pretreatment levels by day 64 PT.

Proceedings of the 1996 Command and Control Research and Technology Symposium: Command and Control in the Information Age

Originally published in The Classmate Magazine (1961-2001), initially a publication of the Naval Postgraduate School's Officer Students' Wives' Club.