Study of the Time Stability of Tides Using a Long Term (1973–2011) Gravity Record at Strasbourg, France

2013 ◽  
pp. 377-381
Author(s):  
M. Calvo ◽  
S. Rosat ◽  
J. Hinderer ◽  
H. Legros ◽  
J.-P. Boy ◽  
...  
Keyword(s):  
Time Stability

scholarly journals MicroGal Gravity Measurements with MGS-6 Micro-g LaCoste Gravimeter

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2592 ◽  
Author(s):  
Marek Przyborski ◽  
Jerzy Pyrchla ◽  
Krzysztof Pyrchla ◽  
Jakub Szulwic
Keyword(s):  
Temporal Stability ◽  
Low Noise ◽  
Reference Source ◽  
Time Stability ◽  
Superconducting Gravimeters ◽  
Gravity Measurements ◽  
Gravity Sensor ◽  
The Impact ◽  
Micro Gravity

The article discusses the registration of micro-gravity changes with the MGS-6 Micro-g LaCoste gravity sensor during static measurements. An experiment was carried out to determine how small changes in gravity can be registered using the MGS-6 system sensor. The tides of the Earth’s crust were chosen as the source of disturbance of the field with small amplitude and long-term changes. The tested sensor was placed in a geophysical observatory on a specially designed tripod. Simultaneously on the nearby concrete pillar, the registration of changes in gravity was carried out using the superconducting iGrav gravimeter. The high temporal stability of the superconducting gravimeters and the low noise combined with leading sensitivity of its reading allow it to be considered as a reliable reference source for MGS-6. The article discusses the impact of non-leveling changes of the MGS-6 gravimetry on the reading and determines the size of its non-linear drift. The obtained differences in indications between devices did not exceed 50 μ Gal for 68% of data. The measurements also showed excellent time stability of the MGS-6 measurement system. The data collected during the experiment allowed determining the level of accuracy that can be sought during real measurements using the MGS-6 system on research vessels. They also give an overview of the dynamics of the drift phenomenon of the analyzed research system.

The Munich 15-year follow-up study (MUFUSSAD) on first-hospitalized patients with schizophrenic or affective disorders: Assessing courses, types and time stability of diagnostic classification

2011 ◽  
Vol 26 (4) ◽  
pp. 231-243 ◽  
Author(s):  
H.J. Möller ◽  
M. Jäger ◽  
M. Riedel ◽  
M. Obermeier ◽  
A. Strauss ◽  
...  
Keyword(s):  
Affective Disorders ◽  
Time Stability ◽  
Diagnostic Systems ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Icd 10 ◽  
Dsm Iv ◽  
Chronic Course

AbstractObjectiveIn the context of the development of DSM-V and ICD-11 it appears to be useful to get further data on the validity of the diagnostic differentiation between schizophrenic and affective disorders. This study investigated the relevance of the main diagnostic groups schizophrenia, schizoaffective psychosis and affective disorder in the context of different diagnostic systems (ICD-9, ICD-10, DSM –IV), assessing their time stability, long-term courses, types and functional outcome.MethodsA total of 323 first hospitalized inpatients of the Psychiatric Department of the University Munich were recruited at index time. The full follow-up evaluation including standardized assessment procedures could be performed in 197 patients.ResultsThe re-diagnosis of the patients’ disorders shows that with the transition from ICD-9 to ICD-10 or DSM-IV, the group of affective disorders increased numerically while the diagnostic groups of schizophrenia and schizoaffective disorders decreased in size. The structured clinical interview for DSM-IV (SCID) analysis showed that altogether ICD-10 and DSM-IV had a relatively high diagnostic stability. Of the patients with an ICD-10 diagnosis of schizophrenia, 57% had a chronic course; 61% of the patients with a DSM-IV diagnosis of schizophrenia. Patients with affective disorders, according either to ICD-10 or DSM-IV, had in more than 90% of the cases an episodic-remitting course. In terms of prediction of long-term outcome regarding the differentiation between chronic and non-chronic course, the ICD-10 diagnoses did give a slightly better predictive result than a dimensional approach based on the key psychopathological syndrome scores.ConclusionsThe differentiation between schizophrenic and affective disorders seems meaningful especially under predictive aspects. A dimensional syndromatological description does not exceed the predictive power of the investigated main diagnostic categories, but might increase the clinically relevant information.

Microwires of nickel, cobalt and copper-based alloys characterized by high level of temperature and time stability

2019 ◽  
pp. 82-88
Author(s):  
B. V. Farmakovsky
Keyword(s):  
Temperature Stability ◽  
Time Stability ◽  
Cobalt Chromium ◽  
Long Term Storage ◽  
Nickel Cobalt ◽  
Glass Insulation ◽  
Temperature Hardening ◽  
High Level ◽  
High Degree

The results of investigations of temperature and time stability of cast microwires in glass insulation from resistive alloys of nickel–chrome, cobalt–chromium and copper–nickel systems are presented. It is established that microwires from the investigated alloys retain their temperature stability at temperatures not lower than 350°C. An investigation of the time stability showed that changes in the electrical resistance during long-term storage of microwires (up to 1 year) do not occur in warehouse conditions, and despite the high degree of nonequilibrium of alloys during high-temperature hardening of the melt, relaxation phenomena are not observed. Consequently, the investigated microwires from alloys based on nickel, cobalt and copper are a very promising material for manufacturing thermostable resistive elements for precision instrumentation.

scholarly journals Hydrophobic Polymeric Additives toward a Long-Term Robust Carbonaceous Mudstone Slope

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 802
Author(s):  
Hongyuan Fu ◽  
Caiying Chen ◽  
Huanyi Zha ◽  
Du Yuan ◽  
Qian-Feng Gao ◽  
...  
Keyword(s):  
Polyvinylidene Fluoride ◽  
Mechanical Stability ◽  
Cost Effective ◽  
Interfacial Interaction ◽  
Time Stability ◽  
Excellent Performance ◽  
Polymeric Additives ◽  
Long Time ◽  
Long Lifetime

Slopes with carbonaceous mudstone (CM) are widely distributed in the southwest of China and have experienced numerous geological disasters in special climate, especially in rainfall conditions. Therefore, novel materials to stabilize CM slopes have attracted increasing interests. However, developing ultra-stable and cost-effective additives for CM slopes is still a great challenge. Herein, a hydrophobic polymeric material (polyvinylidene fluoride, PVDF) is investigated as an additive to enhance the mechanical strength and long-time stability of CM slopes. The PVDF is uniformly dispersed in CM matrix via interfacial interaction. The contact angle of the PVDF-modified carbonaceous mudstone (PVDF-MCM) can reach as high as 103.95°, indicating an excellent hydrophobicity. The unconfined compressive strength (UCS) and tensile strength (TS) of PVDF-MCM have been intensively enhanced to 4.07 MPa and 1.96 MPa, respectively, compared with ~0 MPa of pristine CM. Moreover, the UCS and TS of PVDF-MCM remain at 3.24 MPa and 1.03 MPa even after curing for 28 days in high humidity conditions. Our findings show that the PVDF can improve the hydrophobicity of CM significantly, which leads to super mechanical stability of PVDF-MCM. The excellent performance makes PVDF a promising additive for the development of ultra-stable, long-lifetime and cost-effective carbonaceous mudstone slopes.

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.

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