bluuebunny/crossref_metadata_2025_split huggingface dataset:
Interannual Variation of the Late Fall Rainfall in Central Vietnam
Authors: Chen Tsing-Chang , Tsay Jenq-Dar , Yen Ming-Cheng , Matsumoto Jun 
Published: July 2011

AbstractThe heavy rainfall/flood (HRF) event in central Vietnam usually occurs in October–November, the maximum rainfall season. This rainfall maximum undergoes a distinct interannual variation, opposite the interannual variation of sea surface temperature (SST) anomalies averaged over the NOAA Niño-3.4 area—ΔSST(Niño-3.4)—but coincident with the intensification (weakening) of the low-level easterlies at 15°N and westerlies at 5°N. The changes of low-level zonal winds reflect the strengthening (weakening) of the tropical cyclonic shear flow in tropical South/Southeast Asia in response to the tropical Pacific SST anomalies. Because the rainfall maximum in central Vietnam is primarily produced by the HRF cyclone, the interannual rainfall variation in this region should be attributed to the HRF cyclone activity—a new perspective of the climate change in precipitation. On average, one HRF cyclone occurs in each cold late fall. The population of the HRF cyclone may not be an important factor causing the interannual rainfall variation in central Vietnam. During the cold late fall, the rain-producing efficiency of the individual HRF cyclone is statistically almost twice those during warm and normal late falls and the most crucial factor leading to the interannual rainfall variation in central Vietnam. It is shown by further hydrological analysis that the increase (decrease) of the HRF cyclone’s rain-producing efficiency is determined by the large-scale environmental flow through the enhancement (weakening) of the regional convergence of water vapor flux.
A Strong Atlantic Meridional Mode Event in 2009: The Role of Mixed Layer Dynamics*
Authors: Foltz Gregory R. , McPhaden Michael J. , Lumpkin Rick 
Published: July 2011

Abstract
In the first half of 2009, anomalous cooling of sea surface temperatures (SSTs) in the equatorial North Atlantic (ENA; 2°–12°N) triggered a strong Atlantic meridional mode event. During its peak in April–May, SSTs in the ENA were 1°C colder than normal and SSTs in the equatorial South Atlantic (5°S–0°) were 0.5°C warmer than normal. Associated with the SST gradient were anomalous northerly winds, an anomalous southward shift of the intertropical convergence zone, and severe flooding in Northeast Brazil. This study uses in situ and satellite observations to examine the mechanisms responsible for the anomalous cooling in the ENA during boreal winter and spring of 2009. It is found that the cooling was initiated by stronger than normal trade winds during January and February 2009 associated with an anomalous strengthening of the subtropical North Atlantic high pressure system. Between 6° and 12°N, unusually strong trade winds cooled the ocean through wind-induced evaporation and deepened the mixed layer anomalously by 5–20 m. Closer to the equator, surface equatorial winds responded to the anomalous interhemispheric SST gradient, becoming northwesterly between the equator and 6°N. The anomalous winds drove upwelling of 0.5–1 m day−1 during March–April, a period when there is normally weak downwelling. The associated vertical turbulent heat flux at the base of the mixed layer led to unusually cool SSTs in the central basin, further strengthening the anomalous interhemispheric SST gradient. These results emphasize the importance of mixed layer dynamics in the evolution of the meridional mode event of 2009 and the potential for positive coupled feedbacks between wind-induced upwelling and SST in the ENA.
A Dynamically Consistent Closure for Zonally Averaged Ocean Models
Authors: Brüggemann Nils , Eden Carsten , Olbers Dirk 
Published: July 2011

Abstract
Simple idealized layered models and primitive equation models show that the meridional gradient of the zonally averaged pressure has no direct relation with the meridional flow. This demonstrates a contradiction in an often-used parameterization in zonally averaged models. The failure of this parameterization reflects the inconsistency between the model of Stommel and Arons and the box model of Stommel, as previously pointed out by Straub.
A new closure is proposed. The ocean is divided in two dynamically different regimes: a narrow western boundary layer and an interior ocean; zonally averaged quantities over these regions are considered. In the averaged equations three unknowns appear: the interior zonal pressure difference Δpi, the zonal pressure difference Δpb of the boundary layer, and the zonal velocity uδ at the interface between the two regions. Here Δpi is parameterized using a frictionless vorticity balance, Δpb by the difference of the mean pressure in the interior and western boundary, and uδ by the mean zonal velocity of the western boundary layer.
Zonally resolved models, a layer model, and a primitive equation model validate the new parameterization by comparing with the respective zonally averaged counterparts. It turns out that the zonally averaged models reproduce well the buoyancy distribution and the meridional flow in the zonally resolved model versions with respect to the mean and time changes.
On the Equivalence between Radiance and Retrieval Assimilation
Authors: Migliorini Stefano 
Published: July 2011

Abstract
The need for consistent assimilation of satellite measurements for numerical weather prediction led operational meteorological centers to assimilate satellite radiances directly using variational data assimilation systems. More recently there has been a renewed interest in assimilating satellite retrievals (e.g., to avoid the use of relatively complicated radiative transfer models as observation operators for data assimilation). The aim of this paper is to provide a rigorous and comprehensive discussion of the conditions for the equivalence between radiance and retrieval assimilation. It is shown that two requirements need to be satisfied for the equivalence: (i) the radiance observation operator needs to be approximately linear in a region of the state space centered at the retrieval and with a radius of the order of the retrieval error; and (ii) any prior information used to constrain the retrieval should not underrepresent the variability of the state, so as to retain the information content of the measurements. Both these requirements can be tested in practice. When these requirements are met, retrievals can be transformed so as to represent only the portion of the state that is well constrained by the original radiance measurements and can be assimilated in a consistent and optimal way, by means of an appropriate observation operator and a unit matrix as error covariance. Finally, specific cases when retrieval assimilation can be more advantageous (e.g., when the estimate sought by the operational assimilation system depends on the first guess) are discussed.
Simple Diagnosis of Tropical Cyclone Structure via Pressure Gradients
Authors: Knaff John A. , Sampson Charles R. , Fitzpatrick Patrick J. , Jin Yi , Hill Christopher M. 
Published: July 2011

Abstract
In 1980 the Holland tropical cyclone (TC) wind profile model was introduced. This simple model was originally intended to estimate the wind profile based on limited surface pressure information alone. For this reason and its relative simplicity, the model has been used in many practical applications. In this paper the potential of a simplified version of the Holland B parameter, which is related to the shape of the tangential wind profile, is explored as a powerful diagnostic tool for monitoring TC structure. The implementation examined is based on the limited information (maximum wind, central pressure, radius and pressure of the outer closed isobar, radii of operationally important wind radii, etc.) that is typically available in operational models and routine analyses of TC structure. This “simplified Holland B” parameter is shown to be sensitive to TC intensity, TC size, and the rate of radial decay of the tangential winds, but relatively insensitive to the radius of maximum winds. A climatology of the simplified Holland B parameter based on historical best-track data is also developed and presented, providing the expected natural ranges of variability. The relative simplicity, predictable variability, and desirable properties of the simplified Holland B parameter make it ideal for a variety of applications. Examples of how the simplified Holland B parameter can be used for improving forecaster guidance, developing TC structure tools, diagnosing TC model output, and understanding and comparing the climatological variations of TC structure are presented.
Empire or Imperialism
Authors: Haug Wolfgang Fritz 
Published: July 2011

Haug pursues two objectives in this essay. First, he wants to develop a better understanding of the global conflicts at the beginning of the twenty-first century. To reach that understanding, it is, he argues, necessary to get beyond the crude empiricist language of the mainstream. Secondly, therefore, he elaborates and further develops certain key aspects of Antonio Gramsci's theory of hegemony (consensual leadership through multilateralism vs. mere supremacy, “hegemonic sacrifice,” etc.) in order better to grasp the lines of conflicts in national as well as international politics.
Haug takes as his starting point the guiding question of a 2006 conference in Athens, namely whether the current political conjuncture should be interpreted as one of imperialism or, in Hardt and Negri's sense, as empire. He recasts this question from one of interpretation to one of history, and in so doing he rearticulates the concepts of empire vs. imperialism. He sees transnational high-tech capitalism as having arrived at a crossroads. One path from this crossroads, he argues, leads to rival imperialisms; and the other path leads to the formation of a regulated world market flanked by world ecological and social politics, to, in short, an “empire” of transnational capitalism.
The big question underlying Haug's project is this: Will the United States succeed, after the political, military, and economic debacle of the phase of the unilateral “imperialist” politics of George W. Bush, in recovering a political leadership role in the world? The effort of the United States under President Obama to do so must contend with the Bush legacy, consisting of two unwinnable wars, a deep economic crisis that began as a financial crisis, and a politically and culturally divided nation. Haug's essay does not pretend to answer this larger question; its more modest purpose is foundational, that is, to articulate the question more clearly and to establish the prerequisites and criteria for a proper answer.
Polyaniline as a Functional Binder for LiFePO4 Cathodes in Lithium Batteries
Authors: Tamura Takashi , Aoki Yosuke , Ohsawa Toshiyuki , Dokko Kaoru 
Published: July 2011

Abstract
Chemically synthesized polyaniline (PANI) can be used as a functional binder in the manufacture of the LiFePO4 cathode of lithium batteries, and it provides LiFePO4 particles with effective conduction paths, leading to a very low resistance electrode.
Rectus abdominis myocutaneous flaps for perineal reconstruction: modifications to the technique based on a large single-centre experience
Authors: McMenamin DM , Clements D , Edwards TJ , Fitton AR , Douie WJP 
Published: July 2011

INTRODUCTION Perineal wound breakdown with delayed wound healing represents a significant cause of morbidity following surgery and radiotherapy to the perineum. The rectus abdominis myocutaneous (RAM) flap has been used increasingly to reconstruct the perineum with good effect. We describe our six-year experience of reconstruction of the perineum with the RAM flap and share some surgical adjuncts we believe are useful. METHODS We conducted a retrospective case note review of all patients who underwent a reconstruction of the perineum using the RAM flap between August 2003 and October 2009. Indications for the flap, complication rates and outcomes were all observed. RESULTS We conducted 16 RAM flap procedures, 15 of which (94%) were primary repairs and 1 (6%) a secondary repair. Three (19%) developed donor site hernias, two (12.5%) developed minor perineal wound infections, eight (50%) developed minor perineal wound breakdown and in one (6%) flap failure was observed. No perineal hernias were observed. There were no surgical mortalities. CONCLUSIONS The RAM flap has a high success rate and an acceptable morbidity rate and is a useful tool in the reconstruction of complex perineal wounds. Modifications to the standard surgical technique may reduce complications and improve the versatility of this flap.
Peritonsillar abscess after tonsillectomy: a review of the literature
Authors: Farmer SEJ , Khatwa MA , Zeitoun HMM 
Published: July 2011

INTRODUCTIONPeritonsillar abscess (PTA) is a common condition with a complicated aetiology. PTA after tonsillectomy is rare. This literature review of PTA in the absence of tonsil tissue aims to collate experience of these cases and examine the wider implications for understanding the aetiology of PTA formation.METHODSA structured literature review was performed using Ovid MEDLINE®. Keywords ‘quinsy’ or ‘peritonsillar abscess’ were combined with ‘tonsillectomy’.RESULTSThe search resulted in 212 citations and the identification of 11 cases of PTA formation in the absence of tonsil tissue. The most common indication for tonsillectomy was recurrent tonsillitis or PTA. Nine patients had no interval peritonsillar infection (ie a peritonsillar infection after a tonsillectomy) prior to presenting with the PTA. The mean interval between tonsillectomy and PTA was 16 years. All patients were managed either by incision and drainage or by needle aspiration with or without antibiotics.CONCLUSIONSPTA in the absence of tonsil tissue is rare. Potential sources of infection include congenital branchial fistulas, Weber's glands and dental disease. These alternatives should also be considered in patients presenting with PTA formation in the absence of concurrent tonsillitis and may influence management decisions.
Intraoperative cell salvage versus postoperative autologous blood transfusion in hip arthroplasty: a retrospective service evaluation
Authors: Mason L , Fitzgerald C , Powell-Tuck J , Rice R 
Published: July 2011

INTRODUCTION A number of ways of reducing blood loss in arthroplasty have been explored, including preoperative autologous transfusion, intraoperative cell salvage and postoperative autologous transfusions. Both intraoperative blood salvage and postoperative retransfusion drains have been shown to be effective in reducing blood loss in total hip arthroplasty. In our department there was a change in practice from using postoperative retransfusion drains to intraoperative cell salvage. To our knowledge no study has directly compared using intraoperative blood salvage and postoperative retransfusion drains alone in total hip arthroplasty. METHODS This was a retrospective service evaluation including all primary hip arthroplasty performed under our care between January 2006 and December 2008. Patients were divided into two groups: Group A used a postoperative autologous blood transfusion (ABT) drain and Group B used intraoperative cell salvage. RESULTS A total of 144 patients were included in this study: 84 in Group A and 60 in Group B. The mean haemoglobin difference for Group A was 3.96g/dl (standard deviation [SD]: 1.52) and for Group B it was 3.46g/dl (SD: 1.42). The mean haematocrit difference for Group A was 0.12% (SD: 0.05) and for Group B it was 0.10% (SD: 0.04). Using an independent t-test for the comparison of means, a significant difference was found between Group A and B both in regards to haemoglobin difference (p=0.009) and haematocrit difference (p=0.046). CONCLUSIONS We feel that intraoperative cell salvage provides a more efficient method of reducing blood loss than postoperative retransfusion in primary total hip replacement. A prospective randomised study would be useful to ascertain any clinical difference between the two methods.
A single institution experience with skin sparing mastectomy and immediate breast reconstruction
Authors: Doddi S , Singhal T , Kasem A , Desai A 
Published: July 2011

INTRODUCTION Skin sparing mastectomies (SSMs) represent a surgical approach that preserves the natural skin envelope of the breast and, when combined with immediate reconstruction, offers a good cosmetic outcome. The aim of this retrospective study was to compare the risk of local recurrence (LR) in this series with the known rate of recurrence following a conventional mastectomy. METHODS A total of 108 patients with breast cancer who underwent an SSM and immediate breast reconstruction over a 6-year period were reviewed. RESULTS A follow-up of more than eight years showed that three patients (2.78%) had developed LR. CONCLUSIONS The rate of LR is low with SSMs and is comparable to that seen with conventional mastectomies.
Pancreatic and peripancreatic somatostatinomas
Authors: Williamson JML , Thorn CC , Spalding D , Williamson RCN 
Published: July 2011

BACKGROUND Somatostatinomas are rare neuroendocrine tumours with an annual incidence of 1 in 40 million. They arise in the pancreas or periampullary duodenum. Most are clinically non-secretory and do not cause the somatostatinoma syndrome. Many are metastatic at presentation and their management is typically multimodal. CASE HISTORIES Four cases of somatostatinoma are described. Two patients with periampullary disease presented with biliary obstruction, one with frank jaundice and one with incidental bile duct obstruction on investigation of hepatitis B. Each patient had type 1 neurofibromatosis and resection of the somatostatinoma by means of a pylorus-preserving proximal pancreaticoduodenectomy has resulted in long-term survival. Another two patients with metastatic pancreatic somatostatinomas presented with abdominal pain. Contrasting management illustrates current treatment strategies that are dependent in part on the distribution of the disease. DISCUSSION The pathophysiology, presentation, clinical associations and role of diagnostic imaging are discussed for periampullary and pancreatic neuroendocrine tumours. Operative treatment has an important role in both the curative and palliative settings in conjunction with appropriate medical treatments and these are described. Management options depend on the extent of the disease and the cases are used to illustrate the rationale of such strategies.
Native nephrectomy in transplant patients with autosomal dominant polycystic kidney disease
Authors: Patel P , Horsfield C , Compton F , Taylor J , Koffman G , Olsburgh J 
Published: July 2011

INTRODUCTION This study examined the clinical indications and timing for native nephrectomy (NN), together with the associated pathological findings in transplant patients with autosomal dominant polycystic kidney disease (ADPKD) at our institute over a period of 20 years. METHODS A retrospective review was performed of ADPKD patients who had undergone both kidney transplantation and NN. Patients were identified from the kidney transplant database between 1988 and 2008 at Guy's and St Thomas' Hospital and the notes reviewed. All NN specimens were re-reviewed and reported according to current guidelines. RESULTS There were 157 kidney transplants performed for ADPKD (114 cadaveric and 43 living donor). Of these, 31 required NN (28 bilateral). The timing of NN was pre-transplant in 10 cases, at the time of the transplant in 1 case and post-transplant in 20 cases. The indications for NN were urinary tract infection (n=14, 45%), pain (n=12, 39%), tumour suspicion (n=3, 10%), haematuria (n=1, 3%) and space (n=1, 3%). Mortality in this NN series was 3%, with a 65% surgical morbidity rate. The length of hospital stay post-NN was significantly longer with open compared with laparoscopic techniques (p=0.003). There were two renal cell carcinomas (RCCs) in this series. Both patients presented with macroscopic haematuria (bilateral pT1a papillary RCCs in one case and a pT3b clear cell RCC in the other case). The incidence of RCC in this series of ADPKD transplant patients was 1.3%. CONCLUSIONS We have demonstrated that the majority of ADPKD patients do not require NN, with only 20% of our series undergoing this procedure. The timing of NN is variable and dictated by indication. NN was only required to make space for transplantation in one case (combined kidney and pancreas transplant). The main indications for NN were recurrent infection and pain, where NN can provide a successful outcome. Laparoscopic NN can be performed safely in patients with ADPKD. Haematuria in such patients should not be assumed to be of benign origin and requires exclusion of urinary tract malignancy as the incidence of RCC in this population is at least as common as in the general population.
The use and effectiveness of cadaveric workshops in higher surgical training: a systematic review
Authors: Gilbody J , Prasthofer AW , Ho K , Costa ML 
Published: July 2011

INTRODUCTION The aim of this systematic review is to describe the use of cadavers in postgraduate surgical training, to determine the effect of cadaveric training sessions on surgical trainees' technical skills performance and to determine how trainees perceive the use of cadaveric workshops as a training tool. METHODS An electronic literature search was performed, restricted to the English language, of MEDLINE®, Embase™, the Cumulative Index to Nursing and Allied Health Literature (CINAHL®), Centre for Agricultural Bioscience (CAB) Abstracts, the Educational Resources Information Center (ERIC™) database, the British Education Index, the Australian Education Index, the Cochrane Library and the Best Evidence in Medical Education website. Studies that were eligible for review included primary studies evaluating the use of human cadaveric surgical workshops for surgical skills training in postgraduate surgical trainees and those that included a formal assessment of skills performance or trainee satisfaction after the training session. RESULTS Eight studies were identified as satisfying the eligibility criteria. One study showed a benefit from cadaveric workshop training with regard to the ability of trainees to perform relatively simple emergency procedures and one showed weak evidence of a benefit in performing more complex surgical procedures. Three studies showed that trainees valued the experience of cadaveric training. CONCLUSIONS Evidence for the effectiveness of cadaveric workshops in surgical training is currently limited. In particular, there is little research into how these workshops improve the performance of surgical trainees during subsequent live surgery. However, both trainees and assessors hold them in high regard and feel they help to improve operative skills. Further research into the role of cadaveric workshops is required.
Cultivating Reputations: The Social Goal of Western Australian Primary School Bullies
Authors: Nathan Elijah , Houghton Stephen , Tan Carol , Carroll Annemaree 
Published: July 2011

AbstractAim: This research sought to determine the significance of reputation in the lives of bullies particularly in relation to the social purposes it serves and the goals that are met through its enhancement. Method: One hundred and thirty-two (62 males and 70 females) Western Australian Grades 5, 6 and 7 primary school children completed the Reputation Enhancement scale. Of these students, 38 had official records of suspension from school for bullying peers. Major Findings: A multivariate analysis of variance revealed significant differences between bullies and nonbullies in their reputational orientations. Bullies admired peers involved in nonconforming activities and believed that peers of the same age held similar views. Furthermore, these bullies believed that others perceived them as nonconforming and as breaking the rules, and they (i.e., the bullies) ideally wished to be perceived in this way. These findings are discussed in the light of reputation enhancement theory as a motivator for bullying and the approaches that schools might take to address it.