Difference between aftershocks and foreshocks in the relationship of magnitude to frequency of occurrence for the great Chilean earthquake of 1960

1966 ◽  
Vol 56 (1) ◽  
pp. 185-200
Author(s):  
Shigeji Suyehiro
Keyword(s):  
Main Shock ◽  
High Sensitivity ◽  
Frequency Equation ◽  
Frequency Of Occurrence ◽  
South Pole ◽  
Central Japan ◽  
Similar Investigation ◽  
Relationship Of ◽  
The Relationship ◽  
Chilean Earthquake

abstract When a relatively small perceptible earthquake occurred near a tripartite net of high sensitivity in central Japan, a substantial difference was found between its 25 foreshocks and 173 aftershocks in the relation of frequency of occurrence and magnitude. For that study the coefficient “b” in the magnitude versus frequency equation is 0.35 for the former and 0.76 for the latter. A similar investigation has been carried out on the great Chilean earthquake of 1960, also accompanied by many foreshocks and aftershocks. Using four sensitive and suitably located U.S.C.G.S. stations, Eureka, Tucson, South Pole, and Byrd, foreshocks and aftershocks were located in addition to those reported by U.S.C.G.S. or B.C.I.S. Forty-five foreshocks and 250 aftershocks were found in a period of 33 hours before and 33 hours after the main shock. The same characteristic found for the Japanese earthquake was also found for the Chilean earthquake; i.e. the foreshocks showed a different picture from the aftershocks for the frequency of occurrence, and an appreciably smaller value seems to be valid for “b” of the foreshocks.

The relationship of plasma creatinine (as eGFR) and high-sensitivity cardiac troponin and NT-proBNP concentrations in a hospital and community outpatient population

2017 ◽  
Vol 50 (15) ◽  
pp. 813-815 ◽  
Author(s):  
Julia M. Potter ◽  
Aaron J. Simpson ◽  
Jennifer Kerrigan ◽  
Emma Southcott ◽  
Marie M. Salib ◽  
...  
Keyword(s):  
Cardiac Troponin ◽  
High Sensitivity ◽  
Plasma Creatinine ◽  
Relationship Of ◽  
The Relationship

Autism Symptom Topography and Maternal Socioemotional Functioning

2010 ◽  
Vol 115 (3) ◽  
pp. 234-249 ◽  
Author(s):  
Naomi Ekas ◽  
Thomas L. Whitman
Keyword(s):  
Social Impact ◽  
Maternal Outcomes ◽  
Frequency Of Occurrence ◽  
Substantial Portion ◽  
Symptom Dimensions ◽  
Socioemotional Functioning ◽  
Autism Symptomatology ◽  
Relationship Of ◽  
The Relationship ◽  
Symptom Type

Abstract Researchers examining the relationship of autism symptomatology and maternal stress have defined symptomatology in terms of level of severity, frequency of occurrence, or symptom type. In the present study, the relationship of maternal perceptions of these dimensions, along with a fourth, symptom diversity, and negative and positive indices of maternal socioemotional functioning was evaluated. Results indicate that each of these symptom dimensions was correlated with most of the measures of negative socioemotional status, together accounting for a substantial portion of the variance in these outcomes. The dimensions were especially robust predictors of negative but not positive maternal outcomes. The need for a systematic multidimensional assessment to evaluate autism symptomatology and its social impact was discussed.

Ground Distance Algorithm for Single-Phase Grounding Fault of Four-Parallel Transmission Lines Based on Twelve-Sequence Component

2014 ◽  
Vol 945-949 ◽  
pp. 2873-2879
Author(s):  
Zhong An Yu ◽  
Ming Zhao Cheng ◽  
Pei Yu Guo ◽  
Neng Ling Tai
Keyword(s):  
Transmission Lines ◽  
Mutual Coupling ◽  
Single Phase ◽  
High Sensitivity ◽  
Parallel Transmission ◽  
Measured Impedance ◽  
Ground Distance ◽  
Impedance Calculation ◽  
Relationship Of ◽  
The Relationship

The application of traditional distance relay for four-parallel transmission lines is adversely affected by the mutual coupling between the lines. The result will lead to not achieved measured impedance calculation. And it has an effect on the operation of ground protection. In this paper, A new ground distance algorithm is proposed for single-phase grounding fault of four-parallel transmission lines. Based on the case of single-phase grounding fault, The first the relationship between fault point voltage and the voltage at protection installed location is presented by twelve-sequence component method. In the basis, According to the relationship of phase corner between the fault voltage and the fault current to eliminate the effect of fault voltage. The simulation results show that the new scheme has high sensitivity and reliability under different single-phase grounding fault of four-parallel transmission lines.

Abstract 16921: Relationship Between Biomarkers and Different Types of Myocardial Fibrosis in Severe Aortic Valvular Heart Disease

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Lucas J Pires ◽  
Vitor E Rosa ◽  
THAMARA C MORAIS ◽  
Antonio S de Santis ◽  
Joao Ricardo C Fernandes ◽  
...  
Keyword(s):  
Heart Disease ◽  
Myocardial Fibrosis ◽  
Valvular Heart Disease ◽  
Extracellular Volume ◽  
High Sensitivity ◽  
Conventional Tests ◽  
Different Types ◽  
Study Population ◽  
Relationship Of ◽  
The Relationship

Introduction: Aortic stenosis (AS) and aortic regurgitation (AR) patients develop both myocardial hypertrophia and fibrosis. B-type natriuretic peptide (BNP) and troponin are biomarkers whose value in aortic valvular heart disease (VHD) remains controversial. Cardiac magnetic resonance (CMR) imaging can detect replacement myocardial fibrosis (MF) by using late gadolinium enhancement (LGE), and diffuse MF by using extracellular volume (ECV) based measures (relative - ECV fraction - and absolute - indexed ECV) calculated from T1 mapping. Data evaluating the relationship of these biomarkers with both types of MF are scarce in AS, and are missing in AR patients. Hypothesis: There is an association between preoperative BNP and troponin and preoperative MF measures in severe aortic VHD patients. Methods: Patients with isolated severe AS or AR were prospectively recruited to be submitted to CMR before surgery, including LGE and ECV measures quantifications. They also collected blood samples for quantification of BNP and high sensitivity T troponin. The relationship between biomarkers and MF parameters was evaluated using linear regression and nonparametric conventional tests. Results: The study population included 99 patients, 67 with AS and 32 with AR. BNP median was 63 (39-103) pg/mL and troponin median was 17 (5-34) ng/L, no difference between AS and AR (p=0.31 and p=0.88, respectively). BNP and troponin were associated with presence of LGE. BNP median was 47 (32-87) pg/mL without LGE vs. 87 (47-190) pg/mL with LGE (p=0.002). Troponin median was 13 (5-25) ng/L without LGE vs. 30 (10-71) ng/L with LGE (p=0.001). Regarding ECV measures, patients with ECV fraction higher than 28.25% had higher BNP levels (p<0.001) and patients with indexed ECV higher than 24.21mL/m 2 had higher troponin levels (p=0.015) (Figure 1). Conclusions: BNP and troponin are associated with quantity of MF in patients with severe aortic VHD with indication of intervention.

Relationship of Stressful Life Events and Adolescents' Employment

1980 ◽  
Vol 47 (3_suppl) ◽  
pp. 1195-1198
Author(s):  
Iliana M. Castillo
Keyword(s):  
Life Events ◽  
Stressful Life Events ◽  
Psychiatric Patients ◽  
Stressful Life ◽  
Frequency Of Occurrence ◽  
Work Study ◽  
Occupational Programs ◽  
Study Programs ◽  
Relationship Of ◽  
The Relationship

The relationship between stressful life events and adolescents' employment was studied using Coddington's Social Readjustment Rating Questionnaire for Adolescents. The amount of stress reported by those 52 health care and industrial work-study occupational programs was significantly greater than that of 31 unemployed students and 43 students in other work-study programs. The results are compared with data from previous studies of adolescent normal and psychiatric patients. Frequency of occurrence and positive and negative connotations of the life events are also discussed.

Research about a High-Sensitivity Automatic Liquid Manometer

2012 ◽  
Vol 241-244 ◽  
pp. 186-189
Author(s):  
Xiang Jun Li ◽  
Wei Wang ◽  
Zhan Jun Ma
Keyword(s):  
Glass Tube ◽  
High Sensitivity ◽  
External Pressure ◽  
Original Position ◽  
Sensitive Detector ◽  
Control Rules ◽  
Position Sensitive ◽  
Relationship Of ◽  
The Relationship ◽  
Liquid Manometer

An automatic liquid manometer which operates on the basis of a position-detecting system is described. A slanting laser beam is directed to the meniscus of liquid in a glass tube manometer without a float and is reflected by the meniscus. The reflected spotlight is focused on a position-sensitive detector (PSD) through a lens. The application of external pressure to the manometer causes the position of the meniscus to change, and the pressure can be gotten indirectly by this position. The relationship of the output of PSD to the displacement of meniscus was investigated, and the fuzzy control rules were determined to make the meniscus back to its original position fast and stable. The system has been tested with good results.

scholarly journals Faecal immunochemical testing in bowel cancer screening: Estimating outcomes for different diagnostic policies

2020 ◽  
pp. 096914132098050
Author(s):  
Shuping J Li ◽  
Linda D Sharples ◽  
Sally C Benton ◽  
Oleg Blyuss ◽  
Christopher Mathews ◽  
...  
Keyword(s):  
Cancer Screening ◽  
Haemoglobin Concentration ◽  
High Sensitivity ◽  
Occult Blood ◽  
Bowel Cancer ◽  
Truncated Regression ◽  
Cancer Screening Programme ◽  
Bowel Cancer Screening ◽  
Relationship Of ◽  
The Relationship

Objectives The National Health Service Bowel Cancer Screening Programme (NHS BCSP) in England has replaced guaiac faecal occult blood testing by faecal immunochemical testing (FIT). There is interest in fully exploiting FIT measures to improve bowel cancer (CRC) screening strategies. In this paper, we estimate the relationship of the quantitative haemoglobin concentration provided by FIT in faecal samples with underlying pathology. From this we estimate thresholds required for given levels of sensitivity to CRC and high-risk adenomas (HRA). Methods Data were collected from a pilot study of FIT in England in 2014, in which 27,238 participants completed a FIT. Those with a faecal haemoglobin concentration (f-Hb) of at least 20 µg/g were referred for further investigation, usually colonoscopy. Truncated regression models were used to explore the relationship between bowel pathology and FIT results. Regression results were applied to estimate sensitivity to different abnormalities for a number of thresholds. Results Participants with CRC and HRA had significantly higher f-Hb, and this remained unchanged after adjusting for age and sex. While a threshold of 20 μg/g was estimated to capture 82.2% of CRC and 64.0% of HRA, this would refer 7.8% of participants for colonoscopy. The current programme threshold used in England of 120 μg/g was estimated to identify 47.8% of CRC and 25.0% of HRA. Conclusions Under the current diagnostic policy of dichotomising FIT results, a very low threshold would be required to achieve high sensitivity to CRC and HRA, which would place further strain on colonoscopy resources. The NHS BCSP in England might benefit from a diagnostic policy that makes greater use of the quantitative nature of FIT.

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