Stability of Edwards Personal Preference Schedule need scale scores and profiles over a seven-week interval /

Seven-week test-retest correlations were obtained for need scale scores and individual need profiles for a sample of pre-flight students. The coefficients for need scales were in the 50's and 60's (2 of 15 were below .50). Mean scores on 7 of the need scales changed significantly over the seven-week intertest interval. Of the 74 individual profile correlations, 64 were significant; the median value was .75. There was some evidence that low profile stability was related to a low consistency score on one or both administrations. The test-retest data were compared with other reliability studies of the Personal Preference Schedule. (Author)."18 October 1967.""Bureau of Medicine and Surgery, MF022.01.02-5001.55."--title page.Includes bibliographical references (page 5)Seven-week test-retest correlations were obtained for need scale scores and individual need profiles for a sample of pre-flight students. The coefficients for need scales were in the 50's and 60's (2 of 15 were below .50). Mean scores on 7 of the need scales changed significantly over the seven-week intertest interval. Of the 74 individual profile correlations, 64 were significant; the median value was .75. There was some evidence that low profile stability was related to a low consistency score on one or both administrations. The test-retest data were compared with other reliability studies of the Personal Preference Schedule. (Author).Mode of access: Internet

A refined thermodilution cardiac output catheter /

A quantitative method for rapid repeated measurements of the right ventricular minute and stroke volumes is described. Based on thermodilution principles, a special cardiac catheter with an upstream heating coil and a downstream resistance thermometer is utilized to measure these parameters. Several new refined features were introduced into the present model of the catheter. These included: (a) the use of a plastic coating which provides optimal durability, flexibility, and resistance to heat; (b) bifilar winding the heating coil; (c) a refined pattern of winding the sensing element wire. (Author)."Bureau of Medicine and Surgery, MR011.01.6."--title page."19 August 1968."Includes bibliographical references (page 18)A quantitative method for rapid repeated measurements of the right ventricular minute and stroke volumes is described. Based on thermodilution principles, a special cardiac catheter with an upstream heating coil and a downstream resistance thermometer is utilized to measure these parameters. Several new refined features were introduced into the present model of the catheter. These included: (a) the use of a plastic coating which provides optimal durability, flexibility, and resistance to heat; (b) bifilar winding the heating coil; (c) a refined pattern of winding the sensing element wire. (Author).Mode of access: Internet

Preliminary report on a test of mechanical comprehension /

Discrepancies between mechanical comprehension test scores and later performance by aviators suggested that paper-pencil tests do not measure the type of mechanical comprehension required of the aviator. The problem was to devise a mechanical task that would include more of the specific elements required in the pilot's job. (Author)."Bureau of Medicine and Surgery, MF 12.524.002.5001D."--title page."18 March 1970."Discrepancies between mechanical comprehension test scores and later performance by aviators suggested that paper-pencil tests do not measure the type of mechanical comprehension required of the aviator. The problem was to devise a mechanical task that would include more of the specific elements required in the pilot's job. (Author).Mode of access: Internet

A simple method for percutaneous introduction of cardiac catheters /

The purpose of this study was to discover a simple method for the percutaneous insertion of cardiac catheters. A special slotted needle has been designed that has significantly reduced the time and number of manipulations required for percutaneous insertion of cardiac catheters. Other advantages of the needle include minimal amount of blood loss and little or no risk of subsequent thrombosis. (Author)."Bureau of Medicine and Surgery, MR011.01.5."--title page."29 March 1968."Includes bibliographical references (page 4)The purpose of this study was to discover a simple method for the percutaneous insertion of cardiac catheters. A special slotted needle has been designed that has significantly reduced the time and number of manipulations required for percutaneous insertion of cardiac catheters. Other advantages of the needle include minimal amount of blood loss and little or no risk of subsequent thrombosis. (Author).Mode of access: Internet

Kinematics nomenclature for physiological accelerations with special reference to vestibular applications /

"This research was sponsored in part by the Office of Advanced Research and Technology, National Aeronautics and Space Administration, NASA R-93."Includes bibliographical references (page 78).Mode of access: Internet

Manikin measurements of the noise attenuation provided by flight helmets /

Measurements of the noise attenuation provided by five flight helmets were obtained on a manikin head and compared with attenuation measurements obtained on human subjects according to the USASI Standard for Evaluating Real-Ear Attenuation at Threshold. The two sets of measurements were similar. The manikin method has certain advantages which should be considered in terms of the particular requirements of an evaluation program: (1) a helmet can be optimally fitted with little expenditure of time; (2) variability introduced by human factors is kept at a minimum; (3) high levels of noise can be used as the test stimulus; (4) visual and auditory monitoring of the attenuated noise provides the experimenter with a precise appraisal of the fit as adjustments are made; (5) manikin measurements are particularly useful in revealing improvements in attenuation resulting from minor modifications. (Author)."Bureau of Medicine and Surgery, MF 12.524.005-5020.1, Naval Air Systems Command A34-531-561/69F12524404."--title page."23 August 1968."Measurements of the noise attenuation provided by five flight helmets were obtained on a manikin head and compared with attenuation measurements obtained on human subjects according to the USASI Standard for Evaluating Real-Ear Attenuation at Threshold. The two sets of measurements were similar. The manikin method has certain advantages which should be considered in terms of the particular requirements of an evaluation program: (1) a helmet can be optimally fitted with little expenditure of time; (2) variability introduced by human factors is kept at a minimum; (3) high levels of noise can be used as the test stimulus; (4) visual and auditory monitoring of the attenuated noise provides the experimenter with a precise appraisal of the fit as adjustments are made; (5) manikin measurements are particularly useful in revealing improvements in attenuation resulting from minor modifications. (Author).Mode of access: Internet

Isoniazid prophylaxis as an aviation risk : preliminary report /

The question of the advisability of aviation personnel continuing in duties involving the actual control of aircraft while taking prophylactic isoniazid was studied. Specifically, adverse side effects of the drug were looked for both subjectively and objectively while subject personnel continued aviation duties. Fifteen aviation personnel were studied with clinical, laboratory, and psychometric examinations for a total of 862.5 person-months of drug ingestion. No significant adverse side effects which were thought to constitute a hazard to the safe performance of flying duties were detected. Although the expected incidence of adverse drug effects from isoniazid is small and no significant effects were detected for this small sample, it is suggested that a large number of subjects be studied prior to formulating a statement of policy in this regard. Meanwhile, aviation duties for personnel undergoing 300-mgm isoniazid therapy are judged to be allowable provided the flight surgeon maintains close scrutiny over such men. The long duration of the isoniazid therapy makes it economically desirable to continue personnel in a flight status. (Author)."Bureau of Medicine and Surgery, MF 12.524.005.5015B."--title page."25 November 1969."Includes bibliographical references (page 7)The question of the advisability of aviation personnel continuing in duties involving the actual control of aircraft while taking prophylactic isoniazid was studied. Specifically, adverse side effects of the drug were looked for both subjectively and objectively while subject personnel continued aviation duties. Fifteen aviation personnel were studied with clinical, laboratory, and psychometric examinations for a total of 862.5 person-months of drug ingestion. No significant adverse side effects which were thought to constitute a hazard to the safe performance of flying duties were detected. Although the expected incidence of adverse drug effects from isoniazid is small and no significant effects were detected for this small sample, it is suggested that a large number of subjects be studied prior to formulating a statement of policy in this regard. Meanwhile, aviation duties for personnel undergoing 300-mgm isoniazid therapy are judged to be allowable provided the flight surgeon maintains close scrutiny over such men. The long duration of the isoniazid therapy makes it economically desirable to continue personnel in a flight status. (Author).Mode of access: Internet

The relationship of the Objectively Scoreable Apperception Test (OAT) to success in naval aviation training /

The objectively scoreable apperception test was administered to 725 naval aviation officer candidates during their first week of training to examine the potential of the test as a supplement to the primary selection system. Multiple correlations were first determined by using only the scores from existing primary selection variables; the criterion was completion versus separation from flight training. With a second set of multiple correlations the dimension scores of the OAT combined with those of the primary selection variables were used. The evidence obtained with the experimental sample indicates the feasibility of developing a similar device geared specifically toward a naval aviation population. (Author)."Bureau of Medicine and Surgery, MF 12.524.002.5010.1."--title page."25 June 1969."Includes bibliographical references (page 5)The objectively scoreable apperception test was administered to 725 naval aviation officer candidates during their first week of training to examine the potential of the test as a supplement to the primary selection system. Multiple correlations were first determined by using only the scores from existing primary selection variables; the criterion was completion versus separation from flight training. With a second set of multiple correlations the dimension scores of the OAT combined with those of the primary selection variables were used. The evidence obtained with the experimental sample indicates the feasibility of developing a similar device geared specifically toward a naval aviation population. (Author).Mode of access: Internet

Development of an aviation combat criterion : preliminary report /

A preliminary report is presented on the development of a combat criterion for naval aviators and flight officers. Interviews with veteran combat aviators, flight officers, and flight surgeons indicated that the flight surgeon was the single best individual capable of identifying unsatisfactory combat personnel. The criteria for identifying a man as unsatisfactory were: 'turned in wings, ' 'had wings taken away, ' 'transferred due to poor performance, ' 'given nonflying duties, ' or 'nominated as person others refuse to fly with.' Questionnaires were sent to all combat deployed flight surgeons, and 57% were completed and returned at the time of this analysis. Results indicate that the flight surgeon identified as combat unsatisfactory that group of officers whose aviation training performance had been below average. Frequency distributions of 17 selection and training variables indicated that only Peer Rating has possible value as a screening device to prevent potentially inadequate performers from reaching the fleet. (Author).See errata for page 4 at end of item."6 August 1968.""Bureau of Medicine and Surgery, M4305.09-3002.1."--title page.Includes bibliographical references (page 6)A preliminary report is presented on the development of a combat criterion for naval aviators and flight officers. Interviews with veteran combat aviators, flight officers, and flight surgeons indicated that the flight surgeon was the single best individual capable of identifying unsatisfactory combat personnel. The criteria for identifying a man as unsatisfactory were: 'turned in wings, ' 'had wings taken away, ' 'transferred due to poor performance, ' 'given nonflying duties, ' or 'nominated as person others refuse to fly with.' Questionnaires were sent to all combat deployed flight surgeons, and 57% were completed and returned at the time of this analysis. Results indicate that the flight surgeon identified as combat unsatisfactory that group of officers whose aviation training performance had been below average. Frequency distributions of 17 selection and training variables indicated that only Peer Rating has possible value as a screening device to prevent potentially inadequate performers from reaching the fleet. (Author).Mode of access: Internet

A study of blood pH, serum potassium concentration, and stress in the squirrel monkey (Saimiri sciureus) /

Serum potassium concentration in the squirrel monkey is elevated as compared to that of other commonly used laboratory animals. This study was designed to determine if the levels observed for the potassium ion are related to a change in pH. Related parameters of serum CO2 and pCO2 are reported. Data accumulated from the study of biochemical parameters in the squirrel monkey cannot be rationalized in terms of in vivo buffer systems. Serum potassium and CO2 appear to be related to altered pH, since low pH values were found in conjunction with low CO2 and high potassium. Stress brought about by restraint during blood collection was found to significantly alter the pH and potassium when these values were compared with those from tranquilized and anesthetized squirrel monkeys which were used as controls. The squirrel monkey appears to present an extreme stress response and thus may be a highly desirable biological system in which to elucidate those in vivo changes associated with stress. (Author)."Bureau of Medicine and Surgery, MR011.01.07."--title page."1 December 1968."Includes bibliographical references (page 8)Serum potassium concentration in the squirrel monkey is elevated as compared to that of other commonly used laboratory animals. This study was designed to determine if the levels observed for the potassium ion are related to a change in pH. Related parameters of serum CO2 and pCO2 are reported. Data accumulated from the study of biochemical parameters in the squirrel monkey cannot be rationalized in terms of in vivo buffer systems. Serum potassium and CO2 appear to be related to altered pH, since low pH values were found in conjunction with low CO2 and high potassium. Stress brought about by restraint during blood collection was found to significantly alter the pH and potassium when these values were compared with those from tranquilized and anesthetized squirrel monkeys which were used as controls. The squirrel monkey appears to present an extreme stress response and thus may be a highly desirable biological system in which to elucidate those in vivo changes associated with stress. (Author).Mode of access: Internet