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Adaptive phase rotation of OFDM signals for PAPR reduction |
High peak-to-average power ratio (PAPR) of the orthogonal frequency division multiplexing (OFDM) signal causes signal distortion, due to nonlinear high power amplifier at the transmitter, and affects received signal quality at the receiver. To reduce the PAPR, various PAPR reduction schemes have been developed. Of thes... |
Radio Frequency Data Communications (RFDC) technology is rapidly becoming a critical component of many traditional industrial engineering functions including materials tracking, inventory control, warehousing, order processing, shipping and database management. As a means of moving information, RFDC has many attractive... |
A new paradigm for strengthening of corneal tissue as well as permanent correction of refractive errors has been proposed. Ultrafast laser irradiation is confined to the levels below optical breakdown such that tissue damage is avoided while creating an ionization field responsible for subsequent photochemical modifica... |
INTRODUCTION Heterocyclic compounds synthesis always ever green in the field of organic chemistry, due to tho se compounds having broad spectrum of biological applications. In recent years, much attention has been directed towards the synthesis of xanthene, especially benzoxanthene compounds due to the fact that benzox... |
[structure: see text]. A novel linker system has been designed, and its first application to solid-phase oligosaccharide synthesis is described. The use of the highly reactive o-nitro-phenoxyacetate linker allows a fast and quantitative cleavage using mild basic conditions. This method combined with the trichloroacetim... |
The radiation oncology alternative payment model (RO-APM) was developed by the Center for Medicare and Medicaid Innovation, a part of the Centers for Medicare & Medicaid Services, as a vehicle to optimize value for patients undergoing radiation therapy. By shifting reimbursement away from fee-for-service and toward a p... |
Abstract Supplier selection processes generally evaluate several criteria in order to fulfill a demand. But, what if the demand itself could be rethought, spreading the possibilities of acquisition? What are the impacts in cost and utility of buying objectives instead of pre-determined materials? This work tries to exp... |
Alcohol portrayals were analyzed for a 3-week composite sample of prime-time fictional television programs aired in the fall of 1986. Approximately 64% of the 195 episodes contained one or more appearances of alcohol. Alcohol was ingested on 50% of all programs. Overall, there were 8.1 alcohol drinking acts per hour. M... |
Artemisia argyi leaf is a widely used traditional Chinese medicine (TCM). In this work, for the first time, the separation and identification of volatile constituents in Artemisia argyi flowers is performed. Gas chromatography-mass spectrometry (GC-MS) with solid-phase microextraction (SPME) is developed for the fast a... |
A generalized search scheme for automatic registration of level-1 data of multiresolution and multi-sensor remote-sensing data was proposed. The robustness and time efficiency of the automatic registration process is critically dependant on the search scheme for identification of control points. The proposed method con... |
Phosphorus (P) in animal manures is an important P pool for P recycling and reclamation. In recent years, thermochemical techniques have gained much interests for effective waste treatment and P recycling. This study comparatively characterized the transformation of P during two representative thermochemical treatments... |
Microevolutionary studies and natural history suggest that host-specialization has promoted the high diversity of tropical sponge-dwelling snapping shrimps (Decapoda, Alpheidae, S&nu&h). Yet the taxonomic difficulty of this genus has precluded rigorous tests of this hypothesis. S. rathbunue Coutiere is among the most a... |
OBJECTIVE |
To study risk factors for cell types of lung cancer. |
METHODS |
Cohort study of 126,293 persons with 1852 subjects with incident cancer. We performed Cox proportional hazards models (8 covariates) to estimate risk of the 4 most numerous specific cell types: adenocarcinoma, squamous cell carcinoma, small cell carcinoma, and bronchioloalveolar carcinoma. |
RESULTS |
Smoking 1 or more cigarette packs per day was a powerful predictor (p < 0.0001) of all cell types, with hazard ratios ranging from 5.8 for bronchioloalveolar to 62.7 for squamous cell carcinoma. Other hazard ratio ranges included male/female from 0.6 (bronchioloalveolar, p < 0.05) to 2.0 (squamous, p < 0.001); black/wh... |
CONCLUSIONS |
These risk factor disparities for lung cancer cell types presumably reflect biologic differences. Future investigation may contribute to increased understanding of tumorigenesis and optimal treatment.The cell-type specific role of Arabidopsis bZIP59 transcription factor in plant immunity. |
Stomatal movement participates in plant immunity by directly affecting the invasion of bacteria, but the genes that regulate stomatal immunity have not been well identified. Here, we characterized the function of the bZIP59 transcription factor from Arabidopsis thaliana, which is constitutively expressed in guard cells... |
Data derived from the MR-CINE phase-contrast flow measurement of renal arteries correlates well with the angiographically detected degree of stenosis and scintigraphic measurements. MR data permit the quantitative analysis of altered hemodynamics and MR is a non-invasive substitute for angiography preoperatively and du... |
1Neurology Service, Department of Paediatric Medicine, KK Women’s and Children’s Hospital, Singapore, 2SingHealth Polyclinics, 3Care and Health Integration Division, Changi General Hospital, Singapore Correspondence: Dr Lim Yi Xiu Jocelyn, Associate Consultant, Neurology Service, Department of Paediatric Medicine, KK W... |
PURPOSE |
To determine the roles of intercellular communication in embryonic eye growth and development, mice with a targeted deletion of the Cx43 gene were examined, and mice without both Cx43 and Cx50 were generated and analyzed. |
METHODS |
Embryonic eyes and lenses from wild-type mice, or mice deficient in Cx43, Cx50, or both Cx43 and Cx50 were collected and analyzed structurally by light and electron microscopy, immunohistochemically using connexin-specific antibodies, biochemically by Western blot analysis, and physiologically by measuring patterns of ... |
RESULTS |
Cx50 expression was limited to the ocular lens and was not detected in either the cornea or the retina. Cx43(-/-) embryos showed development of structurally normal lenses and eyes when examined by light and electron microscopy through embryonic day (E)18.5. In addition, Cx43(-/-) lenses synthesized four different marke... |
CONCLUSIONS |
These data indicate that the unique functional properties of both Cx43 and Cx50 are not required for prenatal lens development and that connexin diversity is required for regulation of postnatal growth and homeostasis.Structure of viroid replicative intermediates: physico-chemical studies on SP6 transcripts of cloned o... |
The structure and structural transitions of transcripts of cloned oligomeric viroid were studied in physico-chemical experiments and stability calculations. Transcripts of (+) and (-) polarity, from unit up to sixfold length, were synthesized from DNA clones of the potato spindle tuber viroid (PSTV) with the SP6 transc... |
Homeopathy one of the allied branch of medical science which has shown several miracles in treat-ing various rare cases, was originated from the Greek terminology “Homoios” which means “Similar” and “Pathos” means suffering or sick-ness(1). The basic law of homeopathy is the law of similar (2).Its basic tenets introduc... |
This study was undertaken to evaluate the efficiency of intraosseous endoscopy for the insertion of pedicle screws. Adult sheep served as an animal model. Under general anesthesia, the authors exposed the posterior lumbar elements through a midline spinal approach and cannulated six to eight pedicles in each sheep, wit... |
Recent advances in molecular genetics have expanded our knowledge of renal tumors and enabled a better classification. These studies have revealed that renal tumors with predominantly "eosinophilic/oncocytic" cytoplasm include several novel biological subtypes beyond the traditionally well-recognized renal oncocytoma a... |
Thirty-five patients with mild to moderate hypertension were randomised into a three months' dietary advised and a three months' control group. The diet was of a composition currently considered to be appropriate, and was monitored by a dietitian. Statistically significant decreases in diastolic blood pressure, mean ar... |
Trust management has become an emerging security paradigm in various areas such as ad hoc networks and cloud computing. One core element of trust management is the indirect trust model that evaluates the trustworthiness of a target based on others' recommendations. The research on indirect trust is still at an early st... |
The technology of preparing of a new ready for use diagnosticum for IHAT on the basis of polysaccharide of Rickettsia prowazekii cultivated by the Weight method has been developed. Technological conditions have been worked out, experimental series of the diagnosticum have been made and tested, high stability during the... |
BACKGROUND AND THE AIM OF THE STUDY |
A major feature of aortic stenosis is massive mineralization of the aortic valve, though the mechanism of the process remains unclear. The study aim was to characterize the chemical composition and morphology of inorganic deposits from surgically excised natural aortic valves and to seek similarities to minerals in bon... |
METHODS |
Mineral deposits from 30 surgically excised natural aortic valves were examined. The control group consisted of autopsy samples (aortic valves, vertebral bodies) and teeth obtained after extraction. Micro-computed tomography (micro-CT) was used to describe the morphology and density of the minerals. X-ray fluorescence ... |
RESULTS |
A poorly crystalline, B-type carbonate-containing hydroxyapatite (HAP) was found to constitute the mineral phase of the aortic valve leaflets. No other chemical compounds were identified. The elemental composition of the minerals in aortic valves and bone/tooth did not differ markedly, except that the Mg concentration ... |
CONCLUSION |
The aortic valve deposits were identified as B-type carbonate-containing HAP, and were not identical to those found in bones and teeth, the main difference being a fourfold elevated Mg content. Mg may have been deposited as a separate compound, as micro-CT results suggested that the formation of mineral deposits in aor... |
A detailed history and physical examination can distinguish between key features of a benign primary headache and concerning symptoms that warrant further evaluation for a secondary headache. Most headaches that are diagnosed in the primary care setting are benign. Among primary headache disorders, tension-type headach... |
The Internet of Things (IoT) can help healthcare companies establish Ambient Assisted Living (AAL). It permits innovative solutions to a well‐known problem, notably the real‐time localization and monitoring of patients and clinicians. Yet, there is no method for indoor localization in the healthcare context that delive... |
OBJECTIVES |
Occupational exposures in population-based case-control studies are increasingly being assessed using decision rules that link participants' responses to occupational questionnaires to exposure estimates. We used a hierarchical process that incorporated decision rules and job-by-job expert review to assign occupational... |
METHODS |
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