Laboratory Observations of Ultra-low-frequency Analog Waves Driven by the Right-hand Resonant Ion Beam Instability

Abstract. In this work we use ion and magnetic field data from the AMPTE-UKS mission to study the characteristics of low frequency (ωr « Ωp) waves observed upstream of the Earth's bow shock. We test the application of various plasma-field correlations and magnetic ratios derived from linear Vlasov theory to identify the modes in this region. We evaluate (for a parameter space consistent with the ion foreshock) the Alfvén ratio, the parallel compressibility, the cross-helicity, the noncoplanar ratio, the magnetic compression and the polarization for the two kinetic instabilities that can be generated in the foreshock by the interaction of hot diffuse ions with the solar wind: the left-hand resonant and the right-hand resonant ion beam instabilities. Comparison of these quantities with the observed plasma-field correlations and various magnetic properties of the waves observed during 10 intervals on 30 October 1984, where the waves are associated with diffuse ions, allows us to identify regions with Alfvénic waves and regions where the predominant mode is the right-hand resonant instability. In all the cases the waves are transverse, propagating at angles ≤ 33° and are elliptically polarized. Our results suggest that while the observed Alfvén waves are generated locally by hot diffuse ions, the right-handed waves may result from the superposition of waves generated by two different types of beam distribution (i.e. cold beam and diffuse ions). Even when there was good agreement between the values of observed transport ratios and the values given by the theory, some discrepancies were found. This shows that the observed waves are different from the theoretical modes and that mode identification based only on polarization quantities does not give a complete picture of the waves' characteristics and can lead to mode identification of waves whose polarization may agree with theoretical predictions even when other properties can diverge from those of the theoretical modes.

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An analytical approach to the low-frequency breakdown of the right hand side and scattered field computation in EFIE

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI) ◽

10.1109/aps.2013.6710695 ◽

2013 ◽

Cited By ~ 2

Author(s):

Saad Omar ◽

Dan Jiao

Keyword(s):

Scattered Field ◽

Analytical Approach ◽

Low Frequency ◽

Field Computation ◽

Right Hand ◽

The Right

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Editorial Note

Journal of Speech Disorders ◽

10.1044/jshd.1101.02 ◽

1946 ◽

Vol 11 (1) ◽

pp. 2-2

Keyword(s):

Editorial Note ◽

Speech Sounds ◽

Left Hand ◽

Hand Column ◽

Right Hand ◽

Infant Speech ◽

The Right

In the article “Infant Speech Sounds and Intelligence” by Orvis C. Irwin and Han Piao Chen, in the December 1945 issue of the Journal, the paragraph which begins at the bottom of the left hand column on page 295 should have been placed immediately below the first paragraph at the top of the right hand column on page 296. To the authors we express our sincere apologies.

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The Occlusion Effect in Unilateral Functional Hearing Loss

Journal of Speech and Hearing Research ◽

10.1044/jshr.1301.37 ◽

1970 ◽

Vol 13 (1) ◽

pp. 37-40

Author(s):

Gary Thompson ◽

Marie Denman

Keyword(s):

Hearing Loss ◽

Bone Conduction ◽

Low Frequency ◽

Clinical Implications ◽

The Right ◽

Occlusion Effect

Bone-conduction tests were administered to subjects who feigned a hearing loss in the right ear. The tests were conducted under two conditions: With and without occlusion of the non-test ear. It was anticipated that the occlusion effect, a well-known audiological principle, would operate to draw low frequency bone-conducted signals to the occluded side in a predictable manner. Results supported this expectation and are discussed in terms of their clinical implications.

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Eosinophilic vasculitis: an inhabitual and resistant manifestation of a vasculitis

VASA ◽

10.1024/0301-1526/a000060 ◽

2010 ◽

Vol 39 (4) ◽

pp. 344-348 ◽

Cited By ~ 3

Author(s):

Jandus ◽

Bianda ◽

Alerci ◽

Gallino ◽

Marone

Keyword(s):

Skin Biopsy ◽

Intravenous Iron ◽

Small Vessel Vasculitis ◽

High Dose ◽

Raynaud Phenomenon ◽

The Third ◽

Left Elbow ◽

Right Hand ◽

The Right ◽

Trunk Skin

A 55-year-old woman was referred because of diffuse pruritic erythematous lesions and an ischemic process of the third finger of her right hand. She was known to have anaemia secondary to hypermenorrhea. She presented six months before admission with a cutaneous infiltration on the left cubital cavity after a paravenous leakage of intravenous iron substitution. She then reported a progressive pruritic erythematous swelling of her left arm and lower extremities and trunk. Skin biopsy of a lesion on the right leg revealed a fibrillar, small-vessel vasculitis containing many eosinophils.Two months later she reported Raynaud symptoms in both hands, with a persistent violaceous coloration of the skin and cold sensation of her third digit of the right hand. A round 1.5 cm well-delimited swelling on the medial site of the left elbow was noted. The third digit of her right hand was cold and of violet colour. Eosinophilia (19 % of total leucocytes) was present. Doppler-duplex arterial examination of the upper extremities showed an occlusion of the cubital artery down to the palmar arcade on the right arm. Selective angiography of the right subclavian and brachial arteries showed diffuse alteration of the blood flow in the cubital artery and hand, with fine collateral circulation in the carpal region. Neither secondary causes of hypereosinophilia nor a myeloproliferative process was found. Considering the skin biopsy results and having excluded other causes of eosinophilia, we assumed the diagnosis of an eosinophilic vasculitis. Treatment with tacrolimus and high dose steroids was started, the latter tapered within 12 months and then stopped, but a dramatic flare-up of the vasculitis with Raynaud phenomenon occurred. A new immunosupressive approach with steroids and methotrexate was then introduced. This case of aggressive eosinophilic vasculitis is difficult to classify into the usual forms of vasculitis and constitutes a therapeutic challenge given the resistance to current immunosuppressive regimens.

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Detection of Sarcoidosis Based on Subcutaneous Nodules in the Dorsum of the Right Hand

Nishi Nihon Hifuka ◽

10.2336/nishinihonhifu.76.14 ◽

2014 ◽

Vol 76 (1) ◽

pp. 14-17

Author(s):

Yoshiyuki KUWAE ◽

Kunitaka HARUNA ◽

Yasushi SUGA

Keyword(s):

Subcutaneous Nodules ◽

Right Hand ◽

The Right

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Carbon Coating for Electron Beam Testing and Focus Ion Beam Reconfiguration

ISTFA 1996: Conference Proceedings from the 22nd International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa1996p0333 ◽

1996 ◽

Author(s):

P. Perdu ◽

G. Perez ◽

M. Dupire ◽

B. Benteo

Keyword(s):

Electron Beam ◽

Sample Preparation ◽

Carbon Coating ◽

Focused Ion Beam ◽

Sacrificial Layer ◽

Ion Beam ◽

Electrical Characterization ◽

Fault Analysis ◽

Voltage Contrast ◽

The Right

Abstract To debug ASIC we likely use accurate tools such as an electron beam tester (Ebeam tester) and a Focused Ion Beam (FIB). Interactions between ions or electrons and the target device build charge up on its upper glassivation layer. This charge up could trigger several problems. With Ebeam testing, it sharply decreases voltage contrast during Image Fault Analysis and hide static voltage contrast. During ASIC reconfiguration with FIB, it could induce damages in the glassivation layer. Sample preparation is getting a key issue and we show how we can deal with it by optimizing carbon coating of the devices. Coating is done by an evaporator. For focused ion beam reconfiguration, we need a very thick coating. Otherwise the coating could be sputtered away due to imaging. This coating is use either to avoid charge-up on glassivated devices or as a sacrificial layer to avoid short circuits on unglassivated devices. For electron beam Testing, we need a very thin coating, we are now using an electrical characterization method with an insitu control system to obtain the right thin thickness. Carbon coating is a very cheap and useful method for sample preparation. It needs to be tuned according to the tool used.

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Construct Validity

10.1093/oso/9780190661557.003.0008 ◽

2017 ◽

Author(s):

Richard McCleary ◽

David McDowall ◽

Bradley J. Bartos

Keyword(s):

Time Series ◽

Construct Validity ◽

Hypothesis Test ◽

Secondary Data ◽

Time Frame ◽

Primary Data ◽

Optimal Time ◽

Intervention Model ◽

Right Hand ◽

The Right

Chapter 8 focuses on threats to construct validity arising from the left-hand side time series and the right-hand side intervention model. Construct validity is limited to questions of whether an observed effect can be generalized to alternative cause and effect measures. The “talking out” self-injurious behavior time series, shown in Chapter 5, are examples of primary data. Researchers often have no choice but to use secondary data that were collected by third parties for purposes unrelated to any hypothesis test. Even in those less-than-ideal instances, however, an optimal time series can be constructed by limiting the time frame and otherwise paying attention to regime changes. Threats to construct validity that arise from the right-hand side intervention model, such as fuzzy or unclear onset and responses, are controlled by paying close attention to the underlying theory. Even a minimal theory should specify the onset and duration of an impact.

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