bluuebunny/crossref_metadata_2025_split huggingface dataset:
SEA99: A revised ground motion prediction relation for use in extensional tectonic regimes
Authors: Spudich P. , Joyner W. B. , Lindh A. G. , Boore D. M. , Margaris B. M. , Fletcher J. B. 
Published: August 2021

AbstractWe present SEA99, a revised predictive relation for geometric mean horizontal peak ground acceleration and 5%-damped pseudovelocity response spectrum, appropriate for estimating earthquake ground motions in extensional tectonic regimes, which we demonstrate to have lower ground motions than other tectonic regimes. SEA99 replaces SEA96, a relation originally derived by Spudich et al. (1996, 1997). The data set used to develop SEA99 is larger than that for SEA96, and minor errors in the SEA96 data set have been corrected. In addition, a one-step regression method described by Joyner and Boore (1993, 1994) was used rather than the two-step method of Joyner and Boore (1981). SEA99 has motions that are as much as 20% higher than those of SEA96 at short distances (5-30 km), and SEA99's motions are about 20% lower than SEA96 at longer periods (1.0-2.0 sec) and larger distance (40-100 km). SEA99 dispersions are significantly less than those of SEA96. SEA99 rock motions are on the average 20% lower than motions predicted by Boore et al. (1994) except for short distances at periods around 1.0 sec, where SEA99 motions exceed those predicted by Boore et al. (1994) by as much as 10%. Comparison of ground motions from normal-faulting and strike-slip events in our data set indicates that normal-faulting horizontal ground motions are not significantly different from extensional regime strike-slip ground motions.
Defining the scalar moment of a seismic source with a general moment tensor
Authors: Bowers David , Hudson John A. 
Published: August 2021

Abstract
We compare several published definitions of the scalar moment M0, a measure of the size of a seismic disturbance derived from the second-order seismic moment tensor M (with eigenvalues m1 ≥ m3 ≥ m2). While arbitrary, a useful definition is in terms of a total moment, MT0 = MI + MD, where MI = |M|, with M = (m1 + m2 + m3)/3, is the isotropic moment, and MD = max(|mj − M|; j = 1, 2, 3), is the deviatoric moment. This definition is consistent with other definitions of M0 if M is a double couple. This definition also gives physically appealing and simple results for the explosion and crack sources. Furthermore, our definitions of MT0, MI and MD are in accord with the parameterization of the moment tensor into a deviatoric part (represented by T which lies in [−1,1]) and a volumetric part (represented by k which lies in [−1, 1]) proposed by Hudson et al. (1989).
Coseismic fluid-pressure response estimated from prediction-error filtering of tidal-band loading
Authors: Masterlark Timothy L. , Wang Herbert F. , Chan Lung S. , Yongtai Che 
Published: August 2021

AbstractA methodology combining prediction-error filters (PEFs) and transfer functions was developed to identify the quasi-static fluid-pressure response observed in wells due to coseismic strain. Water levels in confined aquifers respond to long-term and seasonal trends, recharge events, barometric and ocean tide loading, tidal strain, and tectonic strain. Low-frequency features can be neglected from the quasistatic coseismic response estimation. Transfer functions were constructed to deconvolve the fluid-pressure response due to measured barometric loading. Because direct tidal strain and ocean tide loading measurements are rarely available, theoretical tidal loading is often calculated from astronomical data. However, the calculations are subject to many assumptions. Because tidal driving processes are cyclic, PEFs are a natural choice for removing the fluid-pressure response without assuming a theoretical forcing function in the tidal band. The method was applied to hourly fluid pressure data collected over a 3-year period from two wells in the villages of Gaocun and Tayuan, China. Results of this analysis yielded coseismic fluid pressure heads of −1.6 × 10−2 and +7.6 × 10−2 m for the respective wells in response to the Datong-Yanggao earthquake swarm mainshock (Ms 6.1), 18-24 October 1989. Epicentral distances to the wells were about 200 km. The coseismic fluid-pressure response for each well was also predicted from dislocation model strain scaled by material-dependent volumetric strain sensitivity parameters. These parameters were determined from the static confined response to O1 and M2 earth-tide strain constituents. The predicted response was −2.9 × 10−3 m for the Gaocun well and +2.1 × 10−3 m for the Tayuan well. Although predicted and observed response phases were consistent, both predictions underestimated observed response amplitudes, as has been true in other reported instances.
Finite-difference modeling of two aftershocks of the 1994 Northridge, California, earthquake
Authors: Scrivner Craig W. , Helmberger Donald V. 
Published: August 2021

AbstractRecent evidence for nonlinear behavior of strong motions generated by the Northridge, California, earthquake relies explicitly on the analysis of aftershock data. Thus, correcting these observations for propagational and source effects becomes a crucial step in these studies. Here, we demonstrate that the dipping structure near the edges of the San Fernando Valley can strongly alter the local site responses, especially for shallow events.We model two aftershocks with similar epicenters, but with shallow (4 km) and deep (16 km) hypocentral depths. Waveforms from 12 portable instruments deployed across the basin and recording these events were processed and studied in the 0.3-4-Hz bandpass. For the shallow event, distinctive features are a broad direct S phase and large-amplitude surface waves at the basin stations, and high-frequency S phases at stations in the Santa Monica Mountains. The deep event is less strongly affected by the basin but displays strong evidence of the source radiation pattern. An array analysis indicates 2D propagation for most of the strong arrivals. Some of these features are explained by a simple 2D basin model containing a strong shallow contrast, a factor of 2 jump in seismic velocity at a depth of 1 km within the basin, and a moderate deeper gradient.
Long-period seafloor seismology and deformation under ocean waves
Authors: Webb Spahr C. , Crawford Wayne C. 
Published: August 2021

Abstract
The deformation of the seafloor under loading by long-period ocean waves raises vertical component noise levels at the deep seafloor by 20 to 30 dB above noise levels at good continental sites in the band from 0.001 to 0.04 Hz. This noise substantially limits the detection threshold and signal-to-noise ratio for long-period phases of earthquakes observed by seafloor seismometers. Borehole installation significantly improves the signal-to-noise ratio only if the sensor is installed at more than 1 km below the seafloor because the deformation signal decays slowly with depth. However, the vertical-component deformation signal can be predicted and suppressed using seafloor measurements of pressure fluctuations observed by differential pressure gauges. The pressure observations of ocean waves are combined with measurements of the transfer function between vertical acceleration and pressure to predict the vertical component deformation signal. Subtracting the predicted deformation signal from pressure observations can reduce vertical component noise levels near 0.01 Hz by more than 25 dB, significantly improving signal-to-noise ratios for long-period phases. There is also a horizontal-component deformation signal but it is smaller than the vertical-component signal and only significant in shallow water (&lt;1-km deep). The amplitude of the deformation signal depends both on the long-period ocean-wave spectrum and the elastic-wave velocities in the oceanic crust. It is largest at sedimented sites and in shallow water.
A prospective study of laproscopic paravaginal repair of cystocoele: our experience
Authors: Gosavi Amrapali D. , Dhangar Sanjay P. 
Published: August 2021

Background: Cystocele is diagnosed clinically by vaginal examination approaches using the pelvic organ prolapse quantifications system (POP-Q) of classification. Abdominal and laproscopic are now used due to high failure rate involving the transvaginal repair. Laproscopic repair involves approximation of the vaginal sub-epithelial tissue with the Cooper’s ligament using non-absorbable suture.Methods: This was a prospective observational study from June 2016 to May 2020 over women with symptomatic cystocele of grade ≥2. All patients were preoperatively and post-operatively assessed with quality-of-life questionnaires, pelvic organ prolapse distress inventory-6 (POPDI-6) and urinary distress inventory short form. Clinical examination was done with and without Valsalva maneuver. POP classification was used for grading the prolapse. All patients were assessed for any voiding difficulty after surgery, at one week, three months, six months and 12 months.Results: The median age of patient was 55.5 years. 90.9% patients presented with urinary symptoms. 54.5% patients underwent hysterectomy. The mean blood loss was 55 cc. The anatomic cure rate for cystocoele was 100% in our study in 1 week, 3 months and 6 months post-operatively. There was significant improvement in the quality-of-life scores. Overall, symptomatic relief was seen in 90.9% patients at first week, 95.4% at 3 months, 95.4% at 6 and 12 months follow up. Urinary symptoms were relieved in all patients at first follow up after 7 days, and 95.4% patients during 3, 6 and 12 months follow up.Conclusions: Laproscopic paravaginal cystocoele repair is safe, effective and an easy procedure with good results. The procedure is easy to learn and master with low recurrence rates.
Ovarian tumor: a review
Authors: Kashyap Poonam 
Published: August 2021

Ovarian cancers are the 7th most common cancers in women. It is found more commonly in elderly age group. The survival depends on the stage of diagnosis and many of the patients present in advanced disease when the prognosis becomes dismal. The dilemma is to differentiate them from benign disease so that the unwanted laparotomies could be saved. Biomarkers and radiological classification may play a role in differentiating benign from malignant and deciding on the management. There is no screening method to diagnose ovarian cancers and the patient presents with nonspecific complaints missing them in early stages. Optimal cytoreduction is required for better overall survival, progression free survival and response to adjuvant chemotherapy. Those women having history of breast, ovary, endometrial, colorectal cancers should be screened for malignancies and genetic testing is advised. Surgery is the mainstay of treatment followed by chemotherapy. Risk reducing salpingoophorectomy can be offered to women having BRCA1 and BRCA2 mutation carriers after they complete their family. The area of target therapies is the most recent and promising in treatment of ovarian cancer. They are coming in forefront when chemotherapy toxicity, drug resistance are big hurdles in treatment of ovarian cancer. With recent advances and understanding of the biology of ovarian cancer have led to clinical trials of targeted agents. The angiogenesis inhibitors and polyadenosine diphosphate-ribose polymerase (PARP) inhibitors are the most developed.
Paratuberculosis bovina, revisión de literatura
Authors: Buitrago-López Alejandra , Castro-Forero Sandra , Fernández-Jiménez Mónica , Pulido-Medellín Martín 
Published: August 2021

La paratuberculosis bovina (PTB) es una enfermedad crónica causada por el bacilo Mycobacterium avium subespecie paratuberculosis (MAP). Tiene distribución a nivel mundial y genera pérdidas económicas para los productores por el bajo rendimiento productivo de los animales y el amplio periodo de incubación, en el cual es excretada a través de la materia fecal sin signos clínicos. Así mismo, se reporta que los animales más susceptibles de contraer la enfermedad son los terneros. Entre los métodos de diagnóstico utilizados para la MAP, están PCR, ELISA, cultivo bacteriano de materia fecal, el examen para detección de MAP en muestras de tejido y la prueba de hipersensibilidad cutánea retardada Johnina intradérmica. La MAP es una bacteria con posible potencial zoonótico por su relación con la enfermedad de Crohn. Debido a que no hay tratamiento para la PTB, se deben intensificar los mecanismos de control en las producciones.
Outcomes of Bulk Fresh Osteochondral Allografts for Cartilage Restoration in the Knee
Authors: Daud Anser , Safir Oleg A. , Gross Allan E. , Kuzyk Paul R.T. 
Published: August 2021

Background:
Symptomatic osteochondral defects of the knee in young patients can cause substantial disability and predispose to osteoarthritis. Fresh osteochondral allografts (FOCAs) are a treatment option for such defects. With our institution having one of the longest-running FOCA programs, we investigated the long-term outcomes of bulk FOCA in the knee, focusing on graft survivorship, function, complications, and reoperation.

Methods:
A total of 244 patients underwent bulk FOCA in the knee from 1972 to 2018, with a mean age of 37.8 years (range, 10 to 75 years) and a mean follow-up of 9.0 years (range, 1.0 to 29.8 years). Cartilage defects were very large and uncontained, such that they were not amenable to plug transplantation. Survivorship according to Kaplan-Meier analysis was the primary outcome, and failure was defined as conversion to total knee arthroplasty, repeat allograft, graft removal, knee arthrodesis, or amputation. Functional outcome was evaluated with use of the modified Hospital for Special Surgery (mHSS) score, and radiographic evidence of osteoarthritis was classified with use of the Kellgren-Lawrence grading scale.

Results:
Graft survivorship was 86.6% at 5 years, 73.3% at 10 years, 58.1% at 15 years, 43.7% at 20 years, 31.9% at 25 years, and 22.6% at 30 years. The most common complications were pain (14.8%), malalignment (13.9%), and stiffness (5.8%). A total of 93 grafts (38.1%) failed at a mean of 11.0 years (range, 0.5 to 34.0 years). The mean mHSS score improved significantly, from 68.7 (range, 19 to 91) preoperatively to 80.3 (range, 52 to 100) at the time of the latest follow-up (p < 0.001). Preoperative mHSS score had a negative correlation with Kellgren-Lawrence grade at the time of the latest follow-up. Multivariate analysis revealed that graft location (i.e., medial-sided or multiple grafts) and increased age were significantly negatively associated with survival. Ten-year survival was >80% in patients below 50 years old, but <40% in patients >60 years old.

Conclusions:
Bulk FOCA provided promising long-term graft survival and functional improvement in patients <50 years old. It can delay or prevent the need for total knee arthroplasty in young patients. Older patients and patients with a medial-sided graft, or multiple grafts within the same knee, had a less favorable prognosis.

Level of Evidence:
Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.
Adaptive Immune Response Associated with a Zirconium-Containing, Cemented, Total Knee Arthroplasty
Authors: Tarity T. David , Vigdorchik Jonathan M. , Westrich Geoffrey H. , Gonzalez Della Valle Alejandro , Cerrito Paola , Baral Elexis C. , Bromage Timothy G. , Bauer Thomas W. 
Published: August 2021

Case:
A 69-year-old woman underwent revision total knee arthroplasty for patellar component aseptic loosening. The periprosthetic tissue demonstrated histologic features of an adaptive immune response (aseptic lymphocyte-dominant vasculitis-associated lesion [ALVAL]). No particles of corrosion debris were identified. The inflammation seemed to be associated with zirconium oxide (ZrO2) particles added as a bone cement radio-opacifier.

Conclusion:
The factors responsible for the adaptive immune response cannot be determined with certainty; however, this is the first reported case of ALVAL associated with ZrO2-containing bone cement. Previous reports describing ALVAL around failed total knee prostheses have not included observations about the type of contrast material added to cement.
Comparative Experiment of Wellbore Self-Circulation Heat Mining Capacity with Different Heat-Carrying Fluids
Authors: Zhang Liang , Yang Linchao , Geng Songhe , Ren Shaoran 
Published: August 2021

Abstract
Based on the principle of wellbore self-circulation heat mining, the evaluation experiments of local wellbore self-circulation heat exchange laws and influencing factors were carried out. Water, SCCO2, R134a, and heat transfer oil were screened as the heat-carrying fluids. The heat exchange laws and heat mining capacity of these four heat carrying fluids were analyzed and compared, and their heat mining rates at the field scale were estimated using the similarity criterion method according to the experimental results. The results show that R134a and heat transfer oil can obtain the largest outlet temperature and the largest heat loss ratio, while the water can achieve a higher heat mining rate and a larger convective heat transfer coefficient than the other three fluids. The heat mining capacity of CO2 is significantly affected by the injection pressure. It is necessary to optimize the injection pressure larger than critical point to achieve the best heat mining performance. When the water is selected as the heat-carrying fluid, the heat mining rate can reach more than 1 MW if a horizontal wellbore with a length of 2000 m is applied for wellbore self-circulation at the field scale.
Intelligent Robots for Fruit Harvesting: Recent Developments and Future Challenges
Authors: Zhou Hongyu , Wang Xing , Au Wesley , Kang Hanwen , Chen Chao 
Published: August 2021

Abstract
Intelligent robots for fruit harvesting have been actively developed over the past decades to bridge the increasing gap between feeding a rapidly growing population and limited labour resources. Despite significant advancements in this field, widespread use of harvesting robots in orchards is yet to be seen. To identify the challenges and formulate future research and development directions, this work reviews the state-of-the-art of intelligent fruit harvesting robots by comparing their system architectures, visual perception approaches, fruit detachment methods and system performances. The potential reasons behind the inadequate performance of existing harvesting robots are analysed and a novel map of challenges and potential research directions is created, considering both environmental factors and user requirements.
Assessment of anti-SARS-CoV-2 antibodies post-Coronavac vaccination in the Amazon region of Brazil
Authors: Bichara Carlos David Araújo , Queiroz Maria Alice Freitas , Amoras Ednelza da Silva Graça , Vaz Gergiane Lopes , Vallinoto Izaura Maria Vieira Cayres , Bichara Cléa Nazaré Carneiro , Amaral Isabella Pinheiro Costa , Ishak Ricardo , Vallinoto Antonio Carlos Rosário 
Published: August 2021

Abstract

The race to develop a vaccine against SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) has raised questions regarding the safety of immunizers, efficacy regarding the production of neutralizing antibodies, and the longevity of the immune response, especially when related to variables such as sex and age. The present study evaluated the frequency of seropositivity for anti-SARS-CoV-2 (S1 and S2) total antibodies and anti-SARS-CoV-2 (receptor binding domain - RBD - S1) neutralizing antibodies in individuals vaccinated with the immunizing agent Coronavac (Sinovac). This was a cross-sectional study involving 358 individuals divided into two groups. Group 1 consisted of 205 volunteers who were tested for anti-SARS-CoV-2 total antibodies (S1 and S2); group 2 consisted of 153 individuals tested for the presence of anti-SARS-CoV-2 neutralizing antibodies (RBD-S1). Seropositivity was greater than 70% in both groups, though approximately 20% of individuals showed no antibody production. The frequency of anti-SARS-CoV-2 total antibodies (S1 and S2) displayed a significantly different distribution between the sexes but not according to age. The frequency of anti-SARS-CoV-2 (RBD-S1) neutralizing antibodies was 93% in the age group from 21 to 40 years, which was significantly lower with advancing age, to 76% (41 to 60 years), 72% (61 to 80 years) and 47% (>80 years). Our results reveal a high prevalence of anti-SARS-CoV-2 total antibodies (S1 and S2) and anti-SARS-CoV-2 (RBD - S1) neutralizing antibodies in individuals who received both doses of the Coronavac vaccine, suggesting a lower efficiency of the humoral immune response among those older than 60 years of age, which might be associated with senescence of the immune system.
Effect of Grazing Management and Land Cover Types on Mineral-Associated Organic Carbon and Particulate Organic Carbon in a Semi-arid Rangelands in Kenya
Authors: Gitau Angela Nduta , Onwonga R.N. , Mbau J. S. , Chepkemoi J. , Mureithi S. M. 
Published: August 2021

Abstract
BackgroundEnhancing soil organic carbon storage in areas under extensive livestock grazing has become a challenge in most arid and semi-arid rangelands in Sub-Saharan Africa. In Kenya for instance, continuous unplanned grazing in community lands has led to overgrazing and degradation of the rangelands. For decades, livestock production has shaped the landscape through various management practices. Grazing can be used to increase soil organic carbon (SOC) content but intensive use of land can lead to its depletion. This study was set out to elucidate the effect of two types of grazing management under varying land cover types on mineral-associated organic carbon (MAOC) and particulate organic carbon (POC) in the soil. The study was carried out in two ranches, Mpala Research Centre (controlled grazing) and Ilmotiok Community Group Ranch (continuous grazing). The experimental design was a completely randomized block design in split-plot arrangement with three replicates. The main plots were the grazing practices; (controlled grazing and continuous grazing); and sub-plots were the land cover types: (bare ground, patches of grasses, and mosaics of trees). These treatments were randomly selected and replicated three times. Three topographical positions (mid-slope, foot slope and bottom land) were used as a blocking factor.ResultsThe interaction had no significant effect on MAOC fraction in any soil depth interval. Controlled grazed zones significantly recorded higher organic carbon content (POC= 0.887% CC SD=0.49) compared to zones under continuous grazing (POC = 0.718% CC SD=0.3). Mosaic of trees (POC =1.15% CC, SD = 0.22) recorded the highest concentration of carbon followed by patches of grass (POC = 0.87% CC, SD= 0.37) and bare ground (POC = 0.38% CC SD = 0.12) had the least.Conclusion﻿This study shows that grazing practices as well as land cover types have a significant effect on POC but not on MAOC. Mosaic of trees under controlled grazing has higher POC whereas bareground under continuous grazing had the least POC. Destocking should be done under continuous grazed zones to reduce further loss of POC and MAOC and allow vegetation recovery.