Increased fuel economy in transportation systems by use of energy management. Volume III. Real-time (hybrid computer) simulation program set.

Transportation Department, Washington, D.C.

A letter to the Right Honourable Lord Castlereagh, [etc.] [etc.] [etc.] on the North American export-trade during the War, and during any time the import and use of our manufactures are interdicted in the United States.

Mode of access: Internet.

Investigation into more complete use of structural materials through a study of the stress-temperature-time conditions of a re-entry vehicle

Mode of access: Internet.

The ecclesiastical class book : or, History of the church from the birth of Christ to the present time, adapted to the use of academies and schools /

Questions: p. [207]-236.

A familiar survey of the Christian religion and of history : and of history : as connected with the introduction of Christianity : and with its progress tothe present time : intended primarily for the use of young persons of either sex : during the course of public or private education /

Includes index.

The psalmodist; a choice collection of psalm and hymn tunes, chiefly new; adapted to the very numerous metres now in use, together with chants, anthems, motets and various other pieces; for the use of choirs, congregations, singing schools and musical associations; most of which are now for the first time presented to the American public.

Mode of access: Internet.

Essay on the prize-question, whether the use of distilled liquors, or traffic in them, is compatible, at the present time, with making a profession of Christianity? /

A reply to "questions as originally proposed through the agency of the secretary of the American Temperance Society."--P. [3].

A treatise of all sorts of foods, both animal and vegetable: also of drinkables: giving an account how to chuse the best sort of all kinds; of the good and bad effects they produce; the principles they abound with; the time, age, and constitution they are adapted to. Wherin their nature and use is explain'd according to the sentiments of the most eminent physicians and naturalists, antient and modern ...

Mode of access: Internet.

Tunneling, explosive compounds, and rock drills. Giving the details of practical tunnel work; the constituents and properties of modern explosive compounds; the principles of blasting; the history of ... machine rock-drilling; and detailed descriptions of the various rock-drills and air-compressors in use ... with a history of tunneling from the reign of Rameses II. to the present time.

Plates I and II on one sheet.

Morgan horses : a premium essay on the origin, history, and characteristics of this remarkable American breed of horses; tracing the pedigree from the original Justin Morgan, through the most noted of his progeny, down to the present time. With numerous portraits, to which are added hints for breeding, breaking, and general use and management of horses, with practical directions for training them for exhibition at agricultural fairs /

Publisher's advertisement at end.

An epitome of the homoeopathic healing art, containing the new discoveries and improvements to the present time; designed for the use of families and travelers; and as a pocket companion for the physician.

Mode of access: Internet.

Scripture chronology, digested on a new plan, or, The principal facts of sacred history arranged in the order of time from the creation of the world to the destruction of Jerusalem : for the use of schools and young persons.

Includes bibliographical references.

Use of real-time three-dimensional echocardiography to measure left atrial volume: Comparison with other echocardiographic techniques

Objectives: Left atrial (LA) volume (LAV) is a prognostically important biomarker for diastolic dysfunction, but its reproducibility on repeated testing is not well defined. LA assessment with 3-dimensional. (3D) echocardiography (3DE) has been validated against magnetic resonance imaging, and we sought to assess whether this was superior to existing measurements for sequential echocardiographic follow-up. Methods: Patients (n = 100; 81 men; age 56 +/- 14 years) presenting for LA evaluation were studied with M-mode (MM) echocardiography, 2-dimensional (2D) echocardiography, and 3DE. Test-retest variation was performed by a complete restudy by a separate sonographer within 1 hour without alteration of hemodynamics or therapy. In all, 20 patients were studied for interobserver and intraobserver variation. LAVs were calculated by using M-mode diameter and planimetered atrial area in the apical. 4-chamber view to calculate an assumed sphere, as were prolate ellipsoid, Simpson's biplane, and biplane area-length methods. All were compared with 3DE. Results: The average LAV was 72 +/- 27 mL by 3DE. There was significant underestimation of LAV by M-mode (35 +/- 20 mL, r = 0.66, P < .01). The 3DE and various 2D echocardiographic techniques were well correlated: LA planimetry (85 +/- 38 mL, r = 0.77, P < .01), prolate ellipsoid (73 +/- 36 mL, r = 0.73, P = .04), area-length (64 +/- 30 mL, r = 0.74, P < .01), and Simpson's biplane (69 +/- 31 mL, r = 0.78, P = .06). Test-retest variation for 3DE was most favorable (r = 0.98, P < .01), with the prolate ellipsoid method showing most variation. Interobserver agreement between measurements was best for 3DE (r = 0.99, P < .01), with M-mode the worst (r = 0.89, P < .01). Intraobserver results were similar to interobserver, the best correlation for 3DE (r = 0.99, P < .01), with LA planimetry the worst (r = 0.91, P < .01). Conclusions. The 2D measurements correlate closely with 3DE. Follow-up assessment in daily practice appears feasible and reliable with both 2D and 3D approaches.

Use of pulse transit time to distinguish respiratory events from tidal breathing in sleeping children

Study objectives: Currently, esophageal pressure monitoring is the "gold standard" measure for inspiratory efforts, hut its invasive nature necessitates a better tolerated and noninvasive method to be used on children. Pulse transit time (PTT) has demonstrated its potential as a noninvasive surrogate marker for inspiratory efforts. The principle velocity determinant of PTT is the change in stiffness of the arterial wall and is inversely correlated to BP. Moreover, PTT has been shown to identify changes in inspiratory effort via the BP fluctuations induced by negative pleural pressure swings. In this study, the capability of PTT to classify respiratory, events during sleep as either central or obstructive in nature was investigated. Setting and participants: PTT measure was used in adjunct to routine overnight polysomnographic studies performed on 33 children (26 boys and 7 girls; mean +/- SD age, 6.7 +/- 3.9 years). The accuracy of PTT measurements was then evaluated against scored corresponding respiratory events in the polysomnography recordings. Results: Three hundred thirty-four valid respiratory events occurred and were analyzed. One hundred twelve obstructive events (OEs) showed a decrease in mean PTT over a 10-sample window that had a probability of being correctly ranked below the baseline PTT during tidal breathing of 0.92 (p < 0.005); 222 central events (CEs) showed a decrease in the variance of PTT over a 10-sample window that had a probability of being ranked below the baseline PTT of 0.94 (p < 0.005). This indicates that, at a sensitivity of 0.90, OEs can be detected with a specificity of 0.82 and CEs can be detected with a specificity of 0.80. Conclusions: PTT is able to categorize CEs and OEs accordingly in the absence of motion artifacts, including hypopneas. Hence, PTT shows promise to differentiate respiratory, events accordingly and can be an important diagnostic tool in pediatric respiratory sleep studies.< 0.005); 222 central events (CEs) showed a decrease in the variance of PTT over a 10-sample window that had a probability of being ranked below the baseline PTT of 0.94 (p < 0.005). This indicates that, at a sensitivity of 0.90, OEs can be detected with a specificity of 0.82 and CEs can be detected with a specificity of 0.80. Conclusions: PTT is able to categorize CEs and OEs accordingly in the absence of motion artifacts, including hypopneas. Hence, PTT shows promise to differentiate respiratory, events accordingly and can be an important diagnostic tool in pediatric respiratory sleep studies.');"