scholarly journals Earthquake recurrence rate estimates for eastern Washington and the Hanford Site

1989 ◽  
Author(s):  
A.C. Rohay
Keyword(s):  
Recurrence Rate ◽  
Earthquake Recurrence ◽  
Hanford Site ◽  
Eastern Washington

Comparison of earthquake recurrence-rate estimates using the Gumbel and Gutenberg-Richter formulae

1993 ◽  
Vol 83 (6) ◽  
pp. 1902-1909
Author(s):  
B. F. Howel
Keyword(s):  
Recurrence Rate ◽  
Accurate Estimate ◽  
Accurate Estimation ◽  
Earthquake Recurrence ◽  
Recurrence Rates ◽  
Large Earthquakes

Abstract One thousand earthquakes distributed according to Gutenberg and Richter's formula, log N = 6 − M, were assumed to occur during a 50-yr period. Various fractions were assumed to be overlooked, and randomly distributed errors were added to their magnitudes. These data were used to calculate the expected recurrence rates of large earthquakes using methods developed by Gumbel and by Gutenberg and Richter. Although the method of Gutenberg and Richter leads to a more accurate estimation of recurrence rates with ideal data, when the data are incomplete and reported magnitudes contain errors, Gumbel's method sometimes leads to a more accurate estimate.

Bat Activity and Species Occurrence on the Hanford Site in Eastern Washington

2002 ◽  
Vol 83 (2) ◽  
pp. 35
Author(s):  
Robert A. Gitzen ◽  
Janet L. Erickson ◽  
Stephen D. West
Keyword(s):  
Species Occurrence ◽  
Hanford Site ◽  
Bat Activity ◽  
Eastern Washington

scholarly journals Bacterial Productivity in a Ferrocyanide-Contaminated Aquifer at a Nuclear Waste Site

Water ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1072 ◽  
Author(s):  
Andrew Plymale ◽  
Jacqueline Wells ◽  
Emily Graham ◽  
Odeta Qafoku ◽  
Shelby Brooks ◽  
...  
Keyword(s):  
Cell Density ◽  
Nuclear Waste ◽  
Hyporheic Zone ◽  
Washington State ◽  
Epifluorescence Microscopy ◽  
Bacterial Productivity ◽  
Hanford Site ◽  
Contaminated Aquifer ◽  
The Us ◽  
Eastern Washington

This study examined potential microbial impacts of cyanide contamination in an aquifer affected by ferrocyanide disposal from nuclear waste processing at the US Department of Energy’s Hanford Site in south-eastern Washington State (USA). We examined bacterial productivity and microbial cell density in groundwater (GW) from wells with varying levels of recent and historical total cyanide concentrations. We used tritiated leucine (3H-Leu) uptake as a proxy for heterotrophic, aerobic bacterial productivity in the GW, and we measured cell density via nucleic acid staining followed by epifluorescence microscopy. Bacterial productivity varied widely, both among wells that had high historical and recent total cyanide (CN−) concentrations and among wells that had low total CN− values. Standing microbial biomass varied less, and was generally greater than that observed in a similar study of uranium-contaminated hyporheic-zone groundwater at the Hanford Site. Our results showed no correlation between 3H-Leu uptake and recent or historical cyanide concentrations in the wells, consistent with what is known about cyanide toxicity with respect to iron speciation. However, additional sampling of the CN− affected groundwater, both in space and time, would be needed to confirm that the CN− contamination is not affecting the GW biota.

1903: Long-Term Recurrence Rate After ESWL of Isolated Lower Calyx Stones in Relation to the Collecting System Anatomy

2004 ◽  
Vol 171 (4S) ◽  
pp. 503-503
Author(s):  
Roger M. Mueller ◽  
Bernard Descoeudres ◽  
Werner W. Hochreiter ◽  
Urs E. Studer ◽  
Hansjoerg Danuser
Keyword(s):  
Recurrence Rate ◽  
Collecting System ◽  
Long Term Recurrence Rate

Cystic Bone Lesions in Horses and Humans: A Comparative Review

1998 ◽  
Vol 11 (01) ◽  
pp. 08-18 ◽  
Author(s):  
C. W. McIlwraith ◽  
J. A. Auer ◽  
Brigitte von Rechenberg
Keyword(s):  
Recurrence Rate ◽  
Subchondral Bone ◽  
Fibrous Tissue ◽  
Clinical Signs ◽  
Bone Lesions ◽  
Anatomical Location ◽  
Cystic Lesions ◽  
Bone Cysts ◽  
Biological Behaviour ◽  
Comparative Review

SummaryCases of cystic bone lesions in horses and humans were reviewed in the literature. These lesions are radiolucent areas of bone, recognized as subchondral cystic lesions in the horse (SCL), intra-osseous ganglia (IOG), subchondral bone cysts secondary to osteoarthrosis (OAC), and unicameral bone cysts (UCB) in humans. Their morphology is quite similar, consisting of lesions with a distinct cyst wall, and a cavity filled with fibrous tissue and yellowish mucoid fluid. The lesions are surrounded by sclerotic bone and can be easily diagnosed radiographically. SCL, IOG and OAC occur in the subchondral bone close to the adjacent joint, whereas UCB occur in the metaphysis of long bones. Their aetiology and pathogenesis is still unknown, although primary damage to the subchondral bone, cartilage or local blood supply and growth disturbances are discussed. In this review 703 lesions of SCL in horses, 289 lesions of IOG and 1460 lesions of UCB in humans were compared in their anatomical location and clinical signs. SCL and OAC resembled each other with respect to anatomical location. A correlation of affected bones could not be found for all four groups. Clinical presentation concerning age was most similar for SCL and UCB with both lesions mainly occurring in young individuals. Gender predominance of males was present in SCL, IOG and UCB. Clinical diagnosis was either incidental, or connected with intermittent pain in all lesions except for OAC. Additionally, the lesions were also found in conjunction with degenerative joint disease (SCL, OAC) or pathological fractures (UCB). Cystic bone lesions were either treated conservatively, surgically with curettage alone, curettage in combination with grafting procedures, or intra-lesional application of corticosteroids. SCL and UCB were similar in their biological behaviour concerning their slow response to the therapy and relatively high recurrence rate. None of the cystic bone lesions were comparable, and a common aetiology and pathogenesis could not be found.In a literature review cases of cystic bone lesions in horses and humans were compared with the goal to find a common aetiology and pathogenesis. Cystic bone lesions occur in horses as subchondral cystic lesions (SCL), and in humans as either intra-osseous ganglia (IOG), subchondral cystic lesions secondary to osteoarthrosis (OAC) or unicameral bone cysts (UCB). IOG and OAC compare with SCL mainly in the anatomical location. IOG and SCL resemble each other in size, clinical signs and histology, whereas UCB and SCL show a similar biological behaviour regarding their therapeutic response and recurrence rate. None of the cystic bone lesions in humans were comparable to the SCL in horses in all aspects. A common aetiology and pathogenesis could not be established.

COMPARATIVE STUDY IN BETWEEN INTRALESIONAL VITAMIN D3 AND INTRALESIONAL BLEOMYCIN IN THE TREATMENT OF CUTANEOUS VERRUCAE

2020 ◽  
Vol 4 (8) ◽  
Author(s):  
Shrikant . ◽  
R.D. Mehta ◽  
B.C. Ghiya
Keyword(s):  
Partial Response ◽  
Comparative Study ◽  
Recurrence Rate ◽  
Vitamin D3 ◽  
Complete Response ◽  
Recurrence Rates ◽  
Additional Advantage ◽  
Cost Effective Treatment ◽  
Group A ◽  
Group B

Background: Verruca is one of the common dermatopathologies which has multiple therapeutic options but with variable success rates, refractory cases and high recurrence rates. Nowadays, treatment with intralesional injections has gained recognition due to its effectiveness in clearing verrucae. These act by stimulating the cell-mediated immunity. Out of scores of options available for intralesional therapeutics, Vitamin D3 appears to be more promising but least evaluated. Therefore, we planned to evaluate the efficacy of intralesional Vitamin D3 in various types of cutaneous verrucae. Simultaneously the results were compared with intralesional bleomycin, also. Methods: A total of 200 patients of cutaneous verrucae with varying size and duration were included in the experimental randomized comparative study. We divided them into two groups. Group A, comprising of 100 patients, received 0.2-0.5 ml intralesional Vitamin D3 (600,000 IU, 15mg/ml) and Group B, also of hundred subjects, received intralesional Bleomycin (1 mg/ml) into the base of verrucae. A maximum of 5 verrucae were injected per session at 3 weeks interval until resolution or for a maximum of 4 sessions. Patients were followed up for 6 months after the last injection to assess the clearance status and detect any recurrence. Results: In Group A (Vitamin D3), 'Complete response', 'Partial response' and 'No response' were observed in 85.07%, 6.74% and 8.17% respectively after 4 sessions. Recurrence rate was 0.81% after 6 months. In Group B (Bleomycin), 'Complete response', 'Partial response' and 'No response' were found in 77.99%, 10.47% and 11.53% in the series. Recurrence rate was 1.71%, comparatively higher in group B. Conclusion: The efficacy of intralesional Vitamin D3 was found significantly higher as compared to intralesional Bleomycin in the treatment of cutaneous verrucae with less recurrence rates. Vitamin D3 has an additional advantage of cost-effective treatment over Bleomycin. We purpose its use, as a primary mode of treatment in various types of cutaneous verrucae. Keywords: Bleomycin, Vitamin D3, Verrucae.

Early complications in surgery of umbilical and epigastric hernias

2020 ◽  
Vol 99 (5) ◽  
pp. 207-211
Keyword(s):  
Type 2 Diabetes ◽  
Recurrence Rate ◽  
Mesh Repair ◽  
Early Complications ◽  
Recurrence Rates ◽  
Fascial Defect ◽  
Epigastric Hernia ◽  
Mesh Implantation ◽  
Hernial Sac

ntroduction: Repairs of umbilical and epigastric hernias are common surgical procedures; the choice of the surgical method generally depends on the size of the hernial sac and fascial defect. Methods: Data of patients operated on for umbilical or epigastric hernias in our hospital during two years were assessed retrospectively. The study group included 264 patients; 212 had an umbilical hernia and 52 had an epigastric hernia. We assessed epidemiologic and clinical parameters and their correlation with the occurrence of early postoperative complications. We also looked for the recurrence rate, although during only a short follow-up period. Results: In the case of umbilical hernias, early complications occurred in 6.7% (11/165) after surgery with a simple suture and in 4.3% (2/47) with mesh repair, and the recurrence rates were 3% (5/165) and 21.3% (10/47), respectively. The risk of early complications was significantly higher in larger hernias. The recurrence rate increased with older age, an increased size of the hernial sac and fascial defect, and in patients with type 2 diabetes. In epigastric hernias, early complications occurred in 5.3% (1/19) after surgery with a simple suture and in 6.1% (2/33) with mesh repair. Recurrences only occurred in operations with mesh repair, in 9% (3/33). The risk of early complications was significantly higher in type 2 diabetes patients. Conclusion: Early complications were slightly more frequent in epigastric hernia repairs with mesh implantation, but this was not the case of umbilical hernias. We recommend mesh implantation in larger and borderline sized hernias to reduce the risk of recurrence.

Recurrence rate of hyperprolactinemia after dopamine agonists withdrawal in macroprolactinoma patients

2017 ◽  
Author(s):  
Raluca Trifanescu ◽  
Iuliana Baranga ◽  
Andra Caragheorgheopol ◽  
Anda Dumitrascu ◽  
Monica Gheorghiu ◽  
...  
Keyword(s):  
Recurrence Rate ◽  
Dopamine Agonists
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