scholarly journals RELIABILITY OF IMPEDENCE AND PAD TRANSDUCER METHODS IN LONG TERM RESPIRATORY WAVE FORM RECORDINGS IN INFANTS

1977 ◽  
Vol 11 (4) ◽  
pp. 569-569
Author(s):  
J J Decamilla ◽  
R A Hoekelman ◽  
R S Cooper
Keyword(s):  
Wave Form ◽  
Respiratory Wave

Changes in ERG Wave form of the Isolated Bovine Eye during Long Term Perfusion

1978 ◽  
pp. 243-249
Author(s):  
Y. Tazawa ◽  
H. Imaizumi ◽  
H. Mera ◽  
T. Otsuka ◽  
Y. Takahashi ◽  
...  
Keyword(s):  
Wave Form

‘Crackle’: an annoying component of jet noise

1975 ◽  
Vol 71 (2) ◽  
pp. 251-271 ◽  
Author(s):  
J. E. Ffowcs Williams ◽  
J. Simson ◽  
V. J. Virchis
Keyword(s):  
High Speed ◽  
Angular Position ◽  
Jet Noise ◽  
Wide Frequency Range ◽  
Nonlinear Propagation ◽  
Wave Form ◽  
Long Term Effects ◽  
Recorded Sound ◽  
Recording Process

The paper describes an investigation of a subjectively distinguishable element of high speed jet noise known as ‘crackle’. ‘Crackle’ cannot be characterized by the normal spectral description of noise. It is shown to be due to intense spasmodic short-duration compressive elements of the wave form. These elements have low energy spread over a wide frequency range. The crackling of a large jet engine is caused by groups of sharp compressions in association with gradual expansions. The groups occur at random and persist for some 10−1s, each group containing about 10 compressions, typically of strength 5 × 10−3 atmos at a distance of 50 m. The skewness of the amplitude probability distribution of the recorded sound quantifies crackle, though the recording process probably changes the skewness level. Skewness values in excess of unity have been measured; noises with skewness less than 0·3 seem to be crackle free. Crackle is uninfluenced by the jet scale, but varies strongly with jet velocity and angular position. The jet temperature does not affect crackle, neither does combustion. Supersonic jets crackle strongly whether or not they are ideally expanded through convergent-divergent nozzles. Crackle is formed (we think) because of local shock formation due to nonlinear wave steepening at the source and not from long-term nonlinear propagation. Such long-term effects are important in flight, where they are additive. Some jet noise suppressors inhibit crackle.

Long-term outcome of successful percutaneous transluminal angioplasty of the fibular artery in diabetic foot syndrome and single-vessel calf perfusion depends on doppler wave pattern at the forefoot

VASA ◽  
2010 ◽  
Vol 39 (1) ◽  
pp. 67-75 ◽  
Author(s):  
Hering ◽  
Angelkort ◽  
Keck ◽  
Wilde ◽  
Amann
Keyword(s):  
Wound Healing ◽  
Diabetic Foot ◽  
Wave Pattern ◽  
Transluminal Angioplasty ◽  
Diabetic Foot Syndrome ◽  
Wave Form ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Wave Patterns

Background: In the diabetic foot syndrome (DFS) due to peripheral artery disease, the fibular artery is often the only vessel which can be revascularised. Because the fibular artery does not have a direct connection to the plantar arch, the clinical result of fibular artery PTA is dependent upon the extent of collateralization at the ankle. Therefore, successful PTA of the fibular artery with resulting biphasic doppler waves at the ankle can lead to either biphasic or monophasic post-occlusive doppler wave patterns at the forefoot. We evaluated prospectively the association of the forefoot doppler wave form on long-term clinical outcome in patients with DFS after successful PTA of the fibular artery. Patients and methods: 44 patients with occluded calf vessels and DFS Wagner 2-4 underwent primary successful fibular artery PTA resulting in biphasic ankle doppler wave. According to doppler wave form at the forefoot, patients were divided into 1) a biphasic or 2) a monophasic group. Up to 45 months, we documented doppler wave forms, clinical course, restenosis, reinterventions, wound healing, major- and minor amputations. Results: PTA resulted in a biphasic doppler wave at the forefoot in 26 (59 %), in 18 (41 %) in a monophasic wave pattern. Biphasic forefoot doppler wave was strongly correlated with longer event-free survival (35 bi- vs. 5.5 months monophasic, p = 0.0018) and complete wound healing (69 % s bi- vs. 44 % vs. monophasic p = 0.0309). Major amputations: 2 / 26 (8 %) in the biphasic and in 3 / 18 (17 %) in the monophasic group. Second revascularisation procedures were more often necessary in the monophasic group (7 / 18 (39 % vs. 2 / 26 (8 %)). Conclusion: After successful PTA of the fibular artery, monophasic doppler wave patterns at the forefoot denote insufficient collateralization and are associated with poor outcome. If successful fibular artery PTA results only in monophasic forefoot doppler, additional crural or pedal bypass should be strongly contemplated.

Therapy and prevention for mental health: What if mental diseases are mostly not brain disorders?

2019 ◽  
Vol 42 ◽  
Author(s):  
John P. A. Ioannidis
Keyword(s):  
Mental Health ◽  
Mental Disease ◽  
Brain Disorders ◽  
Social Stressors ◽  
Labor Education ◽  
Mental Diseases ◽  
Long Term Follow Up ◽  
Political Decisions

AbstractNeurobiology-based interventions for mental diseases and searches for useful biomarkers of treatment response have largely failed. Clinical trials should assess interventions related to environmental and social stressors, with long-term follow-up; social rather than biological endpoints; personalized outcomes; and suitable cluster, adaptive, and n-of-1 designs. Labor, education, financial, and other social/political decisions should be evaluated for their impacts on mental disease.

Conceptual short-term memory (CSTM) supports core claims of Christiansen and Chater

2016 ◽  
Vol 39 ◽  
Author(s):  
Mary C. Potter
Keyword(s):  
Working Memory ◽  
Rapid Serial Visual Presentation ◽  
Language Comprehension ◽  
Short Term Memory ◽  
Visual Presentation ◽  
Long Term Memory ◽  
Short Term ◽  
Term Memory ◽  
Use Of Knowledge

AbstractRapid serial visual presentation (RSVP) of words or pictured scenes provides evidence for a large-capacity conceptual short-term memory (CSTM) that momentarily provides rich associated material from long-term memory, permitting rapid chunking (Potter 1993; 2009; 2012). In perception of scenes as well as language comprehension, we make use of knowledge that briefly exceeds the supposed limits of working memory.

Brief summary of Kleť photographic search programme for minor planets

1999 ◽  
Vol 173 ◽  
pp. 189-192
Author(s):  
J. Tichá ◽  
M. Tichý ◽  
Z. Moravec
Keyword(s):  
Ccd Camera ◽  
Minor Planet ◽  
Minor Planets ◽  
Main Belt

AbstractA long-term photographic search programme for minor planets was begun at the Kleť Observatory at the end of seventies using a 0.63-m Maksutov telescope, but with insufficient respect for long-arc follow-up astrometry. More than two thousand provisional designations were given to new Kleť discoveries. Since 1993 targeted follow-up astrometry of Kleť candidates has been performed with a 0.57-m reflector equipped with a CCD camera, and reliable orbits for many previous Kleť discoveries have been determined. The photographic programme results in more than 350 numbered minor planets credited to Kleť, one of the world's most prolific discovery sites. Nearly 50 per cent of them were numbered as a consequence of CCD follow-up observations since 1994.This brief summary describes the results of this Kleť photographic minor planet survey between 1977 and 1996. The majority of the Kleť photographic discoveries are main belt asteroids, but two Amor type asteroids and one Trojan have been found.

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

Long-term Cyclic Variations of Prominences, Green and Red Coronae over Solar Cycles

2000 ◽  
Vol 179 ◽  
pp. 201-204
Author(s):  
Vojtech Rušin ◽  
Milan Minarovjech ◽  
Milan Rybanský
Keyword(s):  
Emission Lines ◽  
High Latitudes ◽  
Green Line ◽  
Solar Cycles ◽  
The South ◽  
Coronal Emission ◽  
Local Maxima ◽  
The North ◽  
Cyclic Variations

AbstractLong-term cyclic variations in the distribution of prominences and intensities of green (530.3 nm) and red (637.4 nm) coronal emission lines over solar cycles 18–23 are presented. Polar prominence branches will reach the poles at different epochs in cycle 23: the north branch at the beginning in 2002 and the south branch a year later (2003), respectively. The local maxima of intensities in the green line show both poleward- and equatorward-migrating branches. The poleward branches will reach the poles around cycle maxima like prominences, while the equatorward branches show a duration of 18 years and will end in cycle minima (2007). The red corona shows mostly equatorward branches. The possibility that these branches begin to develop at high latitudes in the preceding cycles cannot be excluded.

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