Showing papers by "California State University, Long Beach published in 1979"

Method of fabricating metallic sandwich structure

Abstract: The structure and the process for making a metallic sandwich structure in which metal worksheets, preferably made from titanium alloy, are joined in a preselected pattern by an intermittent or discontinuous weld. The joined sheets are sealed by a continuous weld to form an expandable envelope. Application of inert gas pressure to the envelope in a limiting fixture superplastically produces the sandwich structure as the expanded structure diffusion bonds to itself or other worksheets. Core configuration of the structure is determined by the intermittent weld pattern. Face sheets of the sandwich structure may be formed from one sheet of the envelope or may be inserted in the limiting fixture and the envelope expanded against the face sheets. Additionally, the face sheets may be preformed or formed concurrently with the core to produce the desired core and sandwich shape in a single operation.

Inhibitory effects of a new oral gold compound on HeLa cells.

Abstract: Auranofin (AF), a recently introduced oral antirheumatic coordinated gold compound, was investigated for its antitumor potential. Due to certain similarities with the antitumor-coordinated compound, cis-Diamminedichloroplatinum II, we studied the effects of AF on cell proliferation. These studies included assessing DNA, RNA, and protein synthesis as measured by incorporation of 3H-thymidine, 3H-uridine, and 3H-leucine, respectively, into HeLa cells. AF was shown to exert a dose-dependent inhibition on DNA synthesis and to inhibit 3H-thymidine uptake more rapidly and persistently than 3H-uridine or 3H-leucine uptake at a gold concentration of 75--100 micrograms/dl. These three parameters were inhibited with a 24-hour exposure to 100 micrograms/dl. The inhibition of 3H-thymidine uptake in HeLa pretreated for 6 hours with 50 or 100 micrograms/dl of gold was found to be irreversible. No change in tracer uptake was observed in the acid-soluble pool or in the uptake of 3H-2-deoxy-D-glucose in these cells. Furthermore, HeLa cells demonstrated marked reductions in viability and oxygen uptake after exposure to AF. Dose-dependent surface morphological changes, e.g., blebbing, pitting, were noted in these cells after a brief treatment period. These results suggest this coordinated gold compount exerts a significant inhibitory effect on essential biological processes and functions.

Close-up imaging of documents and displays with lens arrays.

Abstract: An unusually short close-up imaging system about 8.5 cm (3⅜ in.) long has been developed for document copiers, oscilloscope cameras, and computer peripheral hard-copy cameras. Arrays of simple lenses are molded in rows and columns on two parallel plastic lens plates. Each lens on the first lens plate forms a demagnified, inverted, intermediate image of a small area of the object in the space between lens plates. Each lens in the second plate erects and magnifies an intermediate image and places the resulting final image in partially overlapped registration with adjacent images, forming an erect uniform composite image of the whole object.

Comparison of Marlex mesh and microporous teflon sheets when used for hernia repair in the experimental animal.

Abstract: A new prosthetic material, microporous expanded Teflon (PTFE) was compared with Marlex mesh in the experimental animal. Triangular pieces of each material were placed beneath the transversalis fascia in the right and left groins of seven white New Zealand rabbits (mean weight, 8 kg). The animals were sacrificed are two week intervals. PTFE was found to retain its position and shape without local or peritoneal reaction. By contrast, Marlex mesh showed marked inflammatory reaction and scarring with complete distortion of the graft. Microscopically, PTFE was completely invaded by fibroblast at eight weeks, with flat orientation of graft to the fibrous tissue forming a "neofascia". In contrast, Marlex mesh lacked fibroblastic incorporation of the graft with marked scarring and distortion. These findings suggest that PTFE could be a useful fascial buttress in inguinal hernia repair where Marlex mesh is now used.

Antibacterial Susceptibility of Plaque Bacteria

Abstract: Selected anaerobic, capnophilic and facultative bacteria isolated from patients with various forms of periodontal health and disease were tested for their susceptibility to antibiotics and antimicrobial agents. Specific bactericidal and minimum inhibitory concentrations were compared to disc zone diameters, thereby generating new standards for the potential selection of antimicrobial agents.

Chronotropic incompetence in exercise testing.

Abstract: Patients with chronotropic incompetence, defined as a failure of the heart rate response to exercise to rise to within two standard deviations of the expected increase with exercise, where studied and compared to patients with known coronary disease by angiogram with and without ST segment depression. 72% of the patients with chronotropic incompetence but without ST depression had significant coronary heart disease. The demonstration of chronotropic incompetence in exercise testing has important predictive implications and should be looked upon as carefully as ST segment changes. There was no evidence of SA node ischemia in these patients. Intrinsic heart rate measurements done in this study suggest autonomic dysfunction as a possible pathophysiologic mechanism for chronotropic incompetence. The heart rate response to exercise may be a useful predictor of the presence and severity of coronary disease. Therefore, a predicted heart rate response with standard deviation for age and sex should be included as part of the stress test protocol.

Alcohol Abuse as Encountered in 51 Instances of Reported Child Abuse

Abstract: seen at a Naval Hospital in California. There were 26 instances (51 per cent) of physical abuse; 20 (39 per cent) of neglect, and 5 (10 per cent) of sexual abuse. Actually, 59 instances of suspected child maltreatment were reported to civilian authorities between August 1976 and January 1978. But of these, 8 could not be surveyed because of inadequate histories and reports and the transient status of their parents. All military ranks were represented, from lower grade enlisted through officers, with the non-commissioned officer status being predominant overall (Table 1). As a group, they portray a cross section from lower to middle class socioeconomic families, with the majority being middle class. Since most of those families resided in the

Mycobacterium avium infection of the skin resembling lepromatous leprosy.

Abstract: SUMMARY A patient on systemic steroid therapy developed a cutaneous papule which histologically resembled lepromatous leprosy. Cultures of this lesion grew Mycobacterium avium. Since there was no evidence of disseminated infection the lesion was excised and the patient continues to do well.

The practice of leaching boron and soluble salts from fly ash-amended soils

Abstract: The leachability of B and salts from two fly ash-amended soils was conducted in a column leaching experiment. Fly ash was applied to the surface 3 cm of a Baywood (acid) sand and an Arizo (calcareous) sandy, loam at 5% by weight; the columns were continously leached with Colorado River water at two different pH's. Boron from fly ash was solubilized more readily in the Baywood than in the Arizo soil. Addition of fly ash increased B levels in the leachates from 0.25 to 2.35 μg ml−1 (Baywood) and 0.93 μg ml−1 (Arizo). Acidified leaching water had no significant effect on B leaching patterns but resulted in leaching higher soluble salts. Approximately 348 and 161 cm of water for the Arizo and the Baywood soils respectively, would be required to reduce the B concentration below a critical limit for B sensitive crops. It is suggested that crops planted when fly ash is applied for disposal/recycling on land should be both salt and B tolerant.

M mode and cross-sectional echocardiographic features of flail posterior mitral leaflets

Abstract: Seventeen patients with accepted M mode echocardiographic criteria for flail mitral leaflet were studied M mode echocardiograms revealed characteristic disordered mitral valve motion: (1) 16 (94 percent) had chaotic diastolic mitral motion; (2) 14 (82 percent) had systolic mitral flutter; (3) 14 (82 percent) had systolic left atrial echoes; and (4) 12 (71 percent) had systolic mitral valve prolapse In 8 patients (47 percent) all four findings were present, with three findings present in 16 (35 percent) and two findings present in 13 (18 percent); none had fewer than two findings Cross-sectional echocardiographic studies in 10 patients revealed a systolic whipping motion of the posterior mitral leaflet into the left atrium in all, abnormal systolic mitral coaptation in all and an abnormal mass of systolic left atrial echoes in 4 None of the first three M mode criteria were observed in 230 patients with uncomplicated "mid systolic click-late systolic murmur" syndrome; cross-sectional echocardiography in 30 of 230 patients revealed normal systolic mitral coaptation and no systolic whipping of the tip of the posterior mitral leaflet into the left atrium

Concave quadratic aircraft attitude reference display system

Abstract: A Heads-Up Display system which displays an attitude reference to pilots in order to provide a reference display system as a primary flight instrument The Heads-up Display system uses a pitch ladder system based on Euler angle data which eliminates the erratic motion or "flip-flop" of the typical pitch ladder which is inherent and unavoidable when pitching near plus or minus 90°, by utilizing a flexible graphics display which presents the pilot with a heads-up view as if he were located inside and at the center of an imaginary sphere which has heading and pitch angle information marked on its inner surface The display of appropriately curved bars as opposed to a straight bar pitch ladder for attitude reference more realistically depicts to the pilot the aircraft situation relative to the outside world This presentation is more easily and more reliably interpreted by the pilot and simplifies the recognition and recovery from unusual attitudes In addition, ground track, yaw rate, turn rate information is available over the entire HUD field-of-view, thus there is no need for the pilot to redirect his attention away from his primary point of interest, the velocity vector, to obtain heading and track information Appropriate equations are evaluated to obtain line-of-sight angles from the aircraft longitudinal axis to the desired pitch and heading points on the pitch ladder display Such equations are solved by computer techniques for a sufficient number of intersecting points to complete the display and the graphics hardware connects the points to form the segments of the pitch ladder which represent the imaginary lines on the sphere and displays the same in the pilot's field-of-view

Remote refueling station

Abstract: A refueling system, for use in a tanker aircraft from a remote location without a direct out-the-window view of the refueling operation, having enhanced three-dimensional viewing of the refueling operation by use of multiple video cameras, polarized video monitors and cross-polarized eye glasses together with controls for movement of the boom tip in elevation and azimuth, as well as controls for extension of the boom tip.

Fastener means and joint for laminates

Abstract: A galvanically compatible flanged sleeve is inserted within a close fitting hole in a structural joint wherein at least one of the structural members is a composite laminate. The sleeve is then expanded outwardly into a high interference fit by the insertion of a fastener therethrough. The sleeve may be of the split type and when such is used, a washer can be provided underneath the flange to prevent damage to the underlying laminate surface. Teflon coated shims may be placed between the mating surfaces of the adjacent structural members heldtogether by the joint when the stress excursions are to be applied to high levels and/or with frequency. Joints so formed of graphite/epoxy laminate have fatigue strengths approaching the ultimate static strength of the joint.

A Rapid (4-6-hour) Urine-culture System for Direct Identification and Direct Antimicrobial Susceptibility Testing

Abstract: This study evaluates a new direct rapid system for urine cultures, including detection and quantitation of positive specimens by Gram stain, direct identification by 4--6-hour incubation of sediment with reagent strips, and antibiotic susceptibility testing by direct (3--4-hour) disk-elution methods. Of 987 routine urine specimens, 121 had significant (less than or equal to 10(5) colony-forming units/ml) gram-negative bacilluria, of which 89% were detected by the Gram stain. Direct rapid identification was correct in 94%. Results of direct disk-elution antimicrobial tests showed overall agreement with results of standard disk diffusion of 93% of tests, and major discrepancies in 4%. For urine specimens with gram-negative bacilluria, this system permitted detection, quantitation, identification, and antimicrobial susceptibility testing in four to six hours with reasonable, though not complete, accuracy.

Sex-role identity and Leadership style: Different labels for the same concept?

Abstract: This study represents an attempt to show a relationship between leader behavior and sex-role identification. Leadership style is measured by the Leadership Behavior Description Questionnaire (Stogdill, Goode, & Day, 1962) and sex-role identification by the Bem Sex-Role Inventory (Bem, 1974). Subjects register a strong preference for a “masculine team” manager. Results support a connection between masculine characteristics and structuring behavior as a leader, but do not uphold hypotheses for the relationship between sex-role identity and leadership style. It is suggested that research should attempt to study each of the four dimensions of sex-role identity and leadership style as independent concepts.

Field effect transconductance amplifiers

Abstract: The present invention relates to the field of amplifiers comprising one or more field effect devices as the active amplifying element and/or as load devices in amplifier circuits The drawbacks to using prior art techniques are many Very high voltage gains are not possible without power supply voltages which greatly exceed the drain-source voltage Further, prior amplifiers are relatively non-linear, and because the amplifier is unsymmetrical, the distortion of an AC input is also unsymmetrical, giving rise not only to high-third and other odd harmonics, but also high-second and other even harmonics Also, obviously, the output is highly sensitive to power supply fluctuations The present invention overcomes these deficiencies by providing a field effect transconductance amplifier having improved linearity and noise rejection characteristics to provide an amplifier output having excellent temporal coherence with the input signal The amplifiers utilize a series connection of two field effect devices, actual or emulated, preferably appropriately biased in a carrier velocity limited region to maximize linearity of the output A high level of rejection of power supply noise may be achieved by a third series field effect device Various embodiments including high gain and power amplifier embodiments are disclosed

Applications and implications of gold therapy

Abstract: Recent advances in biological, chemical and medical disciplines are now providing a better understanding of the processes whereby the complexes of gold exercise their physiological and pharmacological effects. As a result, exciting new developments in their therapeutic applications are occurring and others appear likely in the future.

Animal feed supplement as a thixotropic stable suspension

Abstract: There is disclosed a stable thixotropic suspension of water insoluble animal feed nutrients in an aqueous sugar solution The method comprises incorporating an ammonium phosphate, sulfate or mixture in an aqueous sugar solution in a sufficient quantity to form a gel, controlling the pH of the gel to a value from about 65 to about 75 and adjusting the water content of the mixture to provide a viscosity to the product from about 4,000 to about 10,000 centipoises The resultant gel is an excellent carrier for the suspension of water insoluble nutrients such as, calcium carbonate, calcium sulfate, or insoluble drugs such as monisan The gel provides a very stable suspension of the water insoluble nutrients, providing shelf life stability in excess of 12 weeks over a wide range of temperature High temperature stability of the suspension can be further enhanced by including in the supplement a dispersing agent such as gellatinized starch, an alkali metal alginate or a montmorillonite or kaolin clay

Interior noise control prediction study for high-speed propeller-driven aircraft

Abstract: An analytical model was developed to predict the noise levels inside propeller-driven aircraft during cruise at M = 0.8. The model was applied to three study aircraft with fuselages of different size (wide body, narrow body and small diameter) in order to determine the noise reductions required to achieve the goal of an A-weighted sound level which does not exceed 80 dB. The model was then used to determine noise control methods which could achieve the required noise reductions. Two classes of noise control treatments were investigated: add-on treatments which can be added to existing structures, and advanced concepts which would require changes to the fuselage primary structure. Only one treatment, a double wall with limp panel, provided the required noise reductions. Weight penalties associated with the treatment were estimated for the three study aircraft.

On the Calculation of Symmetric Wakes I. Two-Dimensional Flows

Abstract: A numerical method is presented for calculating the symmetric wakes of two-dimensional bodies for incompressible laminar and turbulent flows. The appropriate thin shear layer equations are solved by using Keller's two-point finite-difference method. To account for the inner shear layer generated by the change of boundary conditions from no slip on the body to smooth flow on the axis of symmetry, a double-structured numerical scheme is used at the trailing edge. The Reynolds shear stress term is modeled by a modified version of the algebraic eddy viscosity approach of Cebeci and Smith. A comparison of centerline velocities for laminar wake flows with zero pressure gradient indicates excellent agreement with those given by Goldstein. In addition, several laminar temperature profiles past a flat plate are computed for several Prandtl numbers. Similar calculations for turbulent wake flows also indicate excellent agreement with the experimental data of Chevray and Kovasznay and show that the centerline velocit...

Predictive accuracy of Q-XQ-T ratio, Q-Tc interval, S-T depression and R wave amplitude during stress testing☆

Abstract: The sensitivity, specificity and predictive value for Q-X Q-T ratio, Q-Tc interval, S-T segment depression, R wave change and various combinations of these criteria were compared in 50 healthy, normal persons and 50 persons with angiographic coronary artery disease defined as 70 percent or greater stenosis of one or more major coronary vessels. Use of a positive S-T segment response and an increase or no change in R wave amplitude as criteria for coronary artery disease resulted in 84 percent sensitivity and 96 percent specificity levels and a 95 percent predictive value. The Q-X Q-T and Q-Tc criteria offered no improvement in sensitivity, specificity or predictive value over S-T segment depression. When the study group was limited to 74 persons, 36 without and 38 with angiographically significant coronary artery disease, a Q-Tc interval of 1.08 or more in combination with either slowly or rapidly upsloping S-T depression after exercise predicted coronary disease at a sensitivity level of 76 percent compared with 50 percent with use of the S-T segment alone (P 0.05). Use of the R wave response with the presence of upsloping S-T segment depression of 1.5 mm or more 80 msec from the J point improved the sensitivity level from 50 percent for S-T depression alone to 76 percent (P 0.05]). The Q-X Q-T ratio could be measured in only 55 patients (74 percent) and offered no improvement over S-T segment depression. Upsloping S-T segment depression of 1.5 mm or more 80 msec from the J point in the immediate postexercise period is most likely a positive test for ischemia. An increase or no change in R wave amplitude in response to exercise in these patients regardless of the degree of S-T segment depression is probably indicative of coronary artery disease. In patients with upsloping S-T segment depression, a Q-Tc interval of 1.08 or more in the immediate postexercise period is a useful measurement in predicting coronary artery disease.

System and method for reproducing pictures and related audio information

Abstract: System, method and record medium for the reproduction of pictures and related audio information on a television receiver or monitor. Video information for discrete frames of the picture is recorded in spaced apart tracks on the record medium, and extended audio information for each frame is recorded in a plurality of individually transcribable tracks between the video tracks. The information is read simultaneously from one of the video tracks and from all of the audio tracks for one frame, and the information from successive ones of the audio tracks is processed sequentially to provide extended sound during repeated reproduction of the picture.

Tandem hydraulic actuator

Abstract: A linear fluid actuator having two pistons and two cylinder chambers in tandem to provide redundancy when supplied from independent pressure sources. The actuator is balanced in that the actuator output force is equal in extend or retract positions. The two cylinder chambers are made from separate housings to prevent crack propagation between the chambers and dual piston rod construction is provided to enhance redundancy.