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We present the joint maximum likelihood (ML) symbol-time and carrier-frequency offset estimator in orthogonal frequency-division multiplexing (OFDM) systems. Redundant information contained within the cyclic prefix enables this estimation without additional pilots. Simulations show that the frequency estimator may be used in a tracking mode and the time estimator in an acquisition mode.
Popular Abstract in Swedish Ortnamn utgör en särskild del av kulturarvet; under århundraden har de muntligen traderats från generation till generation på den plats där de skapats, där de minner om tidigare händelser, aktiviteter och kunskaper. I synnerhet på de håll skriftlig dokumentation är relativt sentida ger ortnamn en möjlighet att nå insikter om den mer avlägsna historien. Detta gäller särsAs a special part of our cultural heritage, toponyms have been handed down orally from generation to generation for centuries or more at the place where they were coined, recalling events, activities and knowledge. Especially where written documentation is relatively young, place names offer a way to reach further back into the past. This is particularly true of many dialectal cultures, in which o
Utsagor från vittnen är ett väsentligt inslag i en effektiv rättskipning. Hot och våld mot vittnen utgör därför ett stort hinder i det brottsbekämpande ar-betet. Om det allmänna inte kan erbjuda vittnen ett tillräckligt skydd vid så-dana angrepp, finns det risk att vittnen väljer att inte samarbeta med polisen, vilket i sin tur kan få till följd att grova brott förblir ouppklarade. I denna studie Statements by witnesses are an essential element of the efficient administra-tion of justice. The occurrence of serious forms of threats and violence to-wards witnesses and their relatives therefore constitutes a major impediment to the work in combating crime. If the public cannot offer witnesses suffi-cient protection from attacks, there is a risk that they will choose not to co-operate with the
Det skatterättsliga arbetstagarbegreppet bygger i stor utsträckning på det arbetsrättsliga arbetstagarbegreppet. Den gränsdragning som görs beträffande arbetstagare respektive uppdragstagare i arbetsrätten är dock inte tillräcklig i skatterätten. Detta beror på att inkomster från verksamhet som i arbetsrättslig mening är att hänföra till uppdragsverksamhet, i skatterätten kan utgöra såväl inkomst
För bara ett par år sedan var tvister om domännamn på Internet ett hett ämne. Det fanns ingen lagstiftning på området som reglerade frågan om vem som hade bättre rätt till ett domännamn. Inte ens i USA där Internet har sitt ursprung fanns någon lagstiftning som angrep detta problemområde. I dag är domännamnsstöld en sämre affärsidé. Sen år 2000 dömer FN-organet World Intellectual Property Organisa
Cavum septum pellucidum (CSP) is commonly observed upon neuroimaging examination in individuals exposed to repetitive head impacts (RHI) and post-mortem in cases with chronic traumatic encephalopathy. Consequently, CSP has been proposed as a potential biomarker for RHI-related neurodegeneration, yet prevalence estimates of CSP across other neurodegenerative diseases and its clinical implications a
BACKGROUND: Oesophagectomy, a corner stone in curative treatment of oesophageal cancer, is a complex procedure with high complication rates. Postoperative gastric tube decompression is debated and some centres are abandoning routine nasogastric (NG) tube use. We hypothesised that postoperative NG tube removal is non-inferior to five days of NG tube decompression, with regard to the risk of anastom
Mini-Symposium Duration: 55 Minutes Contemporary evidence-based models support the early use of electric cars as mobility aids in children with motor disabilities. Monitoring how each child learns to interact with the car, and the learning progression is the key to adjusting the intervention strategies. The ALP 2.0 tool is a qualitative assessment that offers therapists and families a classificati
Out-of-plane nuclear motion stimulated in the core-excited state and symmetry breaking due to this nuclear motion have been investigated for B Is excitation in the BF3 molecule by a combination of three different experimental methods: angle-resolved ion-yield spectroscopy, vibrationally resolved resonant Auger electron spectroscopy and quadruple-ion coincidence momentum-imaging technique. (C) 2002
This study is on a combined effect of window, the daylighting and the thermal effects, in desert houses. It is comprised of two complementary studies. In the introduction a historical review on the development of use daylight has been carried out in order to place the case study in a historical perspective. The first study is comprehensive and contains two main parts. In the first part a study was
In this thesis we focus on four problems in computational geometry: In the first four chapters we consider the problem of covering an arbitrary polygon with simpler polygons, i.e., rectangles. We present several approximation algorithms for this problem, and also some lower bounds on the number of rectangles needed in a covering of a hole-free polygon and on the time-complexity for this and relate
The nucleus Se-70 was studied using the Ca-40(Ca-40, 2alpha2p) reaction at a beam energy of 185 MeV. Gamma rays were measured with the EUROBALL III spectrometer. The known positive-parity bands have been extended and one new band of positive parity and two of negative parity have been identified. These bands are interpreted in terms of the cranked Nilsson-Strutinsky approach. Calculations suggest
Background: Little is known about the heterogeneous etiology of suspected non-Alzheimer’s pathophysiology (SNAP), a group of subjects with neurodegeneration in the absence of β-amyloid. Using antemortem MRI and pathological data, we investigated the etiology of SNAP and the association of neurodegenerative pathologies with structural medial temporal lobe (MTL) measures in β-amyloid-negative subjec
Background: In adults and adolescents with asthma, use of ≥3 short-acting β2-agonist (SABA) canisters/year is associated with increased exacerbation risk. Whether this association is present in younger children remains unknown. In this SABA use IN Asthma (SABINA) Junior study, we assessed the association of SABA collection with exacerbation risk in the general Swedish pediatric asthma population.
Objective: To report methodology and first-year results of a new educational project called Televascular Games,” which took place during coronavirus disease 2019 pandemic. Methods: Complex aneurysmal aortic disease was discussed during a 2-hour competition webinar, according to three modalities. (1) Planning case competition (PCC): Two to four preoperative computed tomography angiography (CTA) sca
Rapid technological improvements are democratizing access to high quality, chromosome-scale genome assemblies. No longer the domain of only the most highly studied model organisms, now non-traditional and emerging model species can be genome-enabled using a combination of sequencing technologies and assembly software. Consequently, old ideas built on sparse sampling across the tree of life have re
Monocytes are key players in innate immunity, with their ability to regulate inflammatory responses and combat invading pathogens. There is a growing body of evidence indicating that long non-coding RNA (lncRNA) participate in various cellular biological processes, including the innate immune response. The immunoregulatory properties of numerous lncRNAs discovered in monocytes remain largely unexp
C4b-binding protein (C4BP) is an important component in the regulation of the complement system and also binds the anticoagulant vitamin K-dependent protein S. These activities are performed by distinct, although structurally related, polypeptides of 70 kDa (alpha chain) and 45 kDa (beta chain), respectively. In this report we have investigated the genetic relationships between these polypeptides.
Activation of the kynurenine pathway (KP) has been reported in patients with pulmonary arterial hypertension (PAH) undergoing PAH therapy. We aimed to determine KP-metabolism in treatment-naïve PAH patients, investigate its prognostic values, evaluate the effect of PAH therapy on KP-metabolites and identify cytokines responsible for altered KP-metabolism. KP-metabolite levels were determined in pl
Tvister gällande kommersiella entreprenader har historiskt sett avgjorts genom skiljeförfaranden och är därtill undantagna från köplagens tillämpningsområde. Under en lång period har entreprenadrätten varit nästintill frikopplad från den allmänna avtalsrätten. Emellertid har andelen tvister som tagits upp i allmän domstol och som sedermera nått ett avgörande i Högsta domstolen ökat under de senastHistorically, construction contract law has been litigated through arbitration, and it is excluded from the scope of the Sale of Goods Act. For a long period of time, construction contact law has nearly been disconnected from general contract law. However, the proportion of litigations raised in general court and subsequently reaching a judicial decision in the supreme court, has increased in rece
