bluuebunny/crossref_metadata_2025_split huggingface dataset:
Considerations for dynamic temperature compensation of wideband ladder‐type SAW filter
Authors: Nakamura Nobuyuki , Komatsu Tomoya , Omori Tatsuya , Hashimoto Ken‐Ya , Yamaguchi Masatsune 
Published: March 2013

AbstractBecause of their excellent features such as small size, wide bandwidth, and low insertion loss, ladder‐type filters based on surface acoustic wave (SAW) technology have been widely used as radio‐frequency (RF) filters in mobile communications. We can realize wide bandwidth and low insertion loss in ladder‐type SAW filters on a Cu‐grating/15°LiNbO3 substrate structure. On the other hand, it is said that wide‐bandwidth filters have poor temperature characteristics. Therefore, this paper discusses dynamic temperature compensation for wideband ladder‐type SAW filters. First, we investigate how wide tunability is achievable using variable capacitors connected in parallel and/or series to SAW resonators in the filter configuration. Second, we measured the temperature characteristics of the resonator. Finally, we simulated temperature compensation in wideband ladder‐type SAW filters. As a result, we were able to compensate the change of the characteristics with the ladder‐type SAW filter connected using variable capacitors. © 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 96(4): 61–66, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10420
Fabrication of a Zn ferrite thick film planar power inductor for DC‐DC converter LSI package
Authors: Okazaki Shinya , Takeuchi Asako , Takeshima Akihrio , Sonehara Makoto , Sato Toshiro , Matsushita Nobuhiro 
Published: March 2013

AbstractIn order to realize a point of load (POL) DC‐DC converter for LSIs, a Zn ferrite thick film power inductor embedded in an LSI package has been fabricated and evaluated in this study. A 10‐µm‐thick spin‐sprayed Zn ferrite film with a high saturation magnetization of 0.57 T was introduced to the magnetic core for a planar power inductor consisting of a 20‐µm‐thick, 650‐µm‐square, two‐turn inner copper spiral coil sandwiched between top and bottom magnetic cores. The Zn ferrite film had a natural resonant frequency of 500 MHz and a static relative permeability of 80. The planar power inductor with a footprint of 850 × 850 µm exhibited a 10‐nH inductance and a quality factor of 20 at 100 MHz. The degradation of inductance owing to the superimposed DC current of 2 A was 17%. The planar power inductor will be applied to a low‐voltage converter with a switching operation at hundreds of megahertz in the future. © 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 96(4): 53–60, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10425
Design technology of stacked NAND‐type FeRAM with two‐transistor‐type memory cell
Authors: Sugano Koichi , Watanabe Shigeyoshi 
Published: March 2013

AbstractA design method for stacked NAND‐type FeRAM with a two‐transistor‐type memory cell is newly proposed. With the newly introduced WL voltage generator, which allows compensation of the drain current variations caused by misalignment of the ferroelectric film removal mask, 4F2 small cell size has been successfully realized. Thirty‐two‐stage stacked NAND‐type FeRAM is a promising candidate for realizing higher reliability than the conventional stacked NAND‐type one‐transistor FeRAM. © 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 96(4): 41–52, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10428 22
Hybrid Polyfunctional Systems Based on Nickel(II) Isonicotinate
Authors: Cortijo Miguel , Herrero Santiago , Jiménez‐Aparicio Reyes , Perles Josefina , Priego José L. , Torralvo M. José , Torroba Javier 
Published: March 2013

AbstractSeveral metal–organic frameworks of nickel(II) were obtained starting from the molecular complex 1, [Ni(OH2)4(4‐pyc)2] (4‐pyc = 4‐pyridinecarboxylate or isonicotinate). By using different reaction conditions, two polymorphs of the anhydrous complex [Ni(4‐pyc)2]n (2a and 2b) and the polynuclear compound [Ni5(OH2)3(4‐pyc)10]n (3) were obtained in very high yield. All of the compounds were characterized by elemental analysis and spectroscopic data. The crystal structure determination of compounds 2b and 3 was also carried out. Structural and topological analysis of these new structural types and other related ones were performed. It was found that compounds 2a and 2b are a rare case of coordination framework isomers. Thermogravimetric studies indicate that compounds 2b and 3 lose the pore‐allocated solvent molecules at moderate temperatures without any significant structural change, and at higher temperatures, compounds 1 and 3 are transformed into 2a. Textural parameters that characterize the microporous networks for 2b and 3 were obtained by nitrogen‐adsorption measurements. For both samples, the micropore size distribution indicates cylindrical pores with diameters of 0.85 (2b) and 0.90 nm (3). The values of Brunauer–Emmett–Teller and Langmuir surface areas are 178 and 185 m2 g–1 for compound 2b, and 995 and 982 m2 g–1 for compound 3. Micropore volumes are 0.065 and 0.350 cm3 g–1 for 2b and 3, respectively. The magnetic properties of compounds 1, 2a, and 2b are consistent with the presence of zero‐field splitting and a small antiferromagnetic coupling between the metal atoms. The magnetic properties of the pentanuclear compound 3 were analyzed by considering one monomer with zero‐field splitting caused by axially distorted NiII octahedral compounds, and two dimeric fragments with magnetic interactions within each dimetallic unit.
Organogold(I) Phosphanes in Palladium‐Catalyzed Cross‐Coupling Reactions in Aqueous Media
Authors: Peña‐López Miguel , Sarandeses Luis A. , Pérez Sestelo José 
Published: March 2013

AbstractCross‐coupling reaction of organogold(I) phosphanes with organic electrophiles in aqueous media has been investigated. Reactions between isolated aryl‐, alkenyl‐, or alkynylgold(I) phosphanes and aryl halides or triflates, alkenyl halides, and allyl acetates proceed under palladium catalysis conditions at room temperature or 80 °C in water with THF as a co‐solvent. The coupling reactions give good yields and are highly versatile and chemoselective, allowing the presence of free amino or hydroxy groups in the electrophile. This methodology was applied to the preparation of substituted phenylalanine esters in a demonstration that gold(I) organometallics are suitable reagents for metal‐catalyzed cross‐coupling reactions under protic conditions.
Impact of p16, p53, smoking, and alcohol on survival in patients with oropharyngeal squamous cell carcinoma treated with primary intensity‐modulated chemoradiation
Authors: Broglie Martina A. , Soltermann Alex , Rohrbach David , Haile Sarah R. , Pawlita Michael , Studer Gabriela , Huber Gerard F. , Moch Holger , Stoeckli Sandro J. 
Published: March 2013

BackgroundAnalysis of the impact of risk factors on survival in patients with oropharyngeal squamous cell carcinoma (OPSCC) treated by primary intensity‐modulated radiotherapy (IMRT).MethodsOne hundred forty patients were included with tissue microarray (TMA) construction and immunohistochemical analysis in 124 patients (87%).ResultsSurvival analysis of patients classified into 3 risk categories according to an algorithm based on p16, smoking, T classification, and N classification revealed significant differences with a low, intermediate, and high‐risk group. There was a significant impact of p53 expression as surrogate marker for smoking on outcome. In multivariate analysis, p16‐positivity was a positive predictor and alcohol as well as N classification was a negative predictor for survival. The algorithm was modified based on alcohol instead of smoking with even more significant differences between the groups.ConclusionsA risk model based on multiple factors instead of p16 as single marker can define different risk groups to select patients for treatment deintensification in future prospective clinical trials. © 2013 Wiley Periodicals, Inc. Head Neck 35: 1698–1706, 2013
Factors predicting the prognosis of oral alendronate‐related osteonecrosis of the jaws: A 4‐year cohort study
Authors: Lee Jang‐Jaer , Cheng Shih‐Jung , Wang Jai‐Jen , Chiang Chun‐Pin , Chang Hao‐Hueng , Chen Hsin‐Ming , Kok Sang‐Heng 
Published: March 2013

BackgroundStudies concerning prognostic factors specific for alendronate‐related osteonecrosis of the jaws (ONJ) are rare.MethodsWe surveyed a cohort of 100 osteoporotic patients with 111 alendronate‐related ONJ lesions treated during a 4‐year period. Prognostic values of clinical variables and serum markers of bone turnover were assessed by univariate and multivariate analyses.ResultsThe cumulative complete response rate at 6 months was 48.65%. Serum bone‐specific alkaline phosphatase (BSAP) level >10 μg/L, lesion depth ≦ 10 mm, and lesions in anterior regions denoted a better chance of healing within 6 months and the adjusted hazard ratios were 2.48 (95% confidence interval [CI], 1.41–4.37), 2.71 (95% CI, 1.57–4.70), and 3.94 (95% CI, 1.87–8.30), respectively.ConclusionsEarly discovery of lesions and prevention of their deeper extension are crucial for improving the prognosis of alendronate‐related ONJ. A higher pretreatment level of BSAP indicates a better prognosis. © 2013 Wiley Periodicals, Inc. Head Neck 35: 1787–1795, 2013
Extracapsular spread in hypopharyngeal squamous cell carcinoma: Diagnostic value of FDG PET/CT
Authors: Joo Young‐Hoon , Yoo Ie‐Ryung , Cho Kwang‐Jae , Park Jun‐Ook , Nam In‐Chul , Kim Min‐Sik 
Published: March 2013

BackgroundThe purpose of this study was to evaluate the use of fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT for the identification of extracapsular spread (ECS) with supporting histologic correlation in hypopharyngeal cancer.MethodWe retrospectively reviewed the medical records of 57 patients who underwent FDG PET/CT for hypopharyngeal cancer.ResultsECS was present in 79% dissected necks (45 of 57 patients) and in 64% dissected cervical levels (55 of 86). A significant difference in standardized uptake value maximum (SUVmax) values was found between cervical lymph nodes with and without ECS (6.10 ± 3.51 vs 1.75 ± 1.46, respectively; p < .001). The cutoff value of SUVmax for differentiating with and without ECS was 2.65 with a sensitivity of 80% and a specificity of 74%. The presence of ECS and median SUVmax were found to have a significant adverse effect on 5‐year disease‐specific survival.ConclusionMedian FDG PET/CT SUVmax cutoff values of 2.65 or greater are associated with a greater risk of ECS in cervical lymph node metastasis from hypopharyngeal squamous cell carcinoma (SCC). © 2013 Wiley Periodicals, Inc. Head Neck 35: 1771–1776, 2013
Sex‐dependent regulation of hippocampal neurogenesis under basal and chronic stress conditions in rats
Authors: Hillerer Katharina M. , Neumann Inga D. , Couillard‐Despres Sebastien , Aigner Ludwig , Slattery David A. 
Published: March 2013

AbstractSex differences in basal as well as in stress‐induced hippocampal neurogenesis processes have been reported in the literature. However, studies directly comparing sex differences on multiple neurogenesis processes under such conditions are lacking to date. Therefore, the aim of the present study was to directly compare cell proliferation and survival, neuronal and astroglial differentiation as well as stem cells quiescence in male and female Wistar rats under both basal and chronic stress conditions (12 days of 2 h restraint stress (RS)). In addition, corticosterone (CORT) levels and spatial working memory were assessed. Under baseline conditions, only the number of immature neurons within the hippocampal dentate gyrus was higher in males compared with females. In contrast, chronic stress resulted in a number of sex‐specific alterations. Thus, stress exposure reduced cell proliferation in males with a concurrent increase in stem cell quiescence, while it did not alter either parameter in females but decreased cell survival. Analysis of astroglial and neuronal differentiation patterns revealed that chronic stress specifically diminished the number of mature neurons in females, with no effect in males. Despite the observed sex differences in adult hippocampal neurogenesis, spatial working memory was not altered by stress exposure in either sex. While basal CORT levels were higher, chronic stress exposure did not affect this parameter in either sex across the initial stress period. This study presents the first direct and detailed evaluation of sex‐dependent and chronic stress‐induced changes in adult hippocampal neurogenesis not only showing changes in cell proliferation and survival, but moreover immature neuron production, differentiation patterns, stem cell quiescence and therefore contributes to a better understanding of sex differences in neurogenesis processes. © 2013 Wiley Periodicals, Inc.
Perceptual versus conceptual interference and pattern separation of verbal stimuli in young and older adults
Authors: Ly Maria , Murray Elizabeth , Yassa Michael A. 
Published: March 2013

AbstractRecently, several studies have strongly suggested that age‐related decline in episodic memory is associated with deficits in hippocampal pattern separation (orthogonalizing overlapping experiences using distinct neural codes). The same studies also link these deficits to neurobiological features such as dentate/CA3 representational rigidity and perforant path loss. This decline in pattern separation is thought to underlie behavioral deficits in discriminating similar stimuli on pictorial tasks. Similar pictorial stimuli invoke interference both in the perceptual and conceptual domains, and do not allow one to be disentangled from another. For example, it is very difficult to design a set of pictorial stimuli that are perceptually similar yet conceptually unrelated. Verbal stimuli, on the other hand, allow experimenters to independently manipulate conceptual and perceptual interference. We tested discrimination on conceptually similar (semantically related) and perceptually similar (phonologically related) verbal stimuli in young (mean age 20) and older adults (mean age 69), and find that older adults are selectively impaired in perceptual pattern separation. This deficit was not secondary to failure in working memory, attention, or visual processing. Based on past studies, we suggest that perceptual discrimination relies on recollection while conceptual discrimination relies more on gist. Our results fit well within the notion that recollection but not familiarity (i.e. gist) is impaired in older adults, and suggests that the impairment observed in pictorial tasks may be driven mostly by failure in perceptual and not conceptual pattern separation. © 2013 Wiley Periodicals, Inc.
Self‐healing, an intrinsic property of biomineralization processes
Authors: Müller Werner E. G. , Wang Xiaohong , Jochum Klaus Peter , Schröder Heinz C. 
Published: March 2013

AbstractThe sponge siliceous spicules are formed enzymatically via silicatein, in contrast to other siliceous biominerals. Originally, silicatein had been described as a major structural protein of the spicules that has the property to allow a specific deposition of silica onto their surface. More recently, it had been unequivocally demonstrated that silicatein displays a genuine enzyme activity, initiating and maintaining silica biopolycondensation at low precursor concentrations (<2 mM). Even more, as silicatein becomes embedded into the biosilica polymer, formed by the enzyme, it retains its functionality to enable a controlled biosilica deposition. The protection of silicatein through the biosilica mantel is so strong that it conserves the functionality of the enzyme for thousands of years. The implication of this finding, the preservation of the enzyme function over such long time periods, is that the intrinsic property of silicatein to display its enzymatic activity remains in the biosilica deposits. This self‐healing property of sponge biosilica can be utilized to engineer novel hybrid materials, with silicatein as a functional template, which are more resistant toward physical stress and fracture. Those hybrid materials can even be used for the fabrication of silica dielectrics coupled to optical nanowires. © 2013 IUBMB Life, 65(5):382–396, 2013.
Growth of river mouth bars in sheltered bays in the presence of frontal waves
Authors: Nardin W. , Mariotti G. , Edmonds D. A. , Guercio R. , Fagherazzi S. 
Published: March 2013

AbstractOne of the key processes for the formation of deltas and their fluvial networks is the deposition of mouth bars in front of prograding distributaries. Waves influence mouth bar growth, but it is not clear how and to what extent. Toward this end, we conduct a modeling study on deltas forming in sheltered bays, where waves are locally generated and both longshore currents and surf zone are absent. We focus on the simplified case of a homopycnal river plume subject to frontal wave attack, and we begin by isolating the effects of waves on jet spreading. An analytical model for the hydrodynamic interaction between incoming waves and a turbulent expanding jet is developed and tested with the numerical model Delft3D coupled to the wave model SWAN. Both the analytical model and Delft3D predict that incoming surface gravity waves increase the spreading of the jet and the interaction between wave and current boundary layers causes an increase in bottom friction. To investigate how waves influence mouth bar morphodynamics, a set of numerical simulations is run with Delft3D‐SWAN utilizing a geometry and wave characteristics typical of sheltered bays. Our numerical results show that in the presence of waves, mouth bars form up to 35% closer to the river mouth and 40% faster when compared to cases without waves. The distance from the river mouth to the stagnated mouth bar decreases with increasing wave height and wave period. The timescale of bar formation is inversely proportional to wave height and directly proportional to wave period. Our modeling study suggests that wave influence on mouth bar growth is complex. Small waves, like the ones modeled here, promote mouth bar formation via increased jet spreading and faster formation time, which in turn should create deltas with more distributary channels. On the other hand, large waves suppress mouth bar formation, as seen in other studies, leading to fewer distributary channels.
Perceived control and sleep in hospitalized older adults: A sound hypothesis?
Authors: Adachi Marie , Staisiunas Paul G. , Knutson Kristen L. , Beveridge Claire , Meltzer David O. , Arora Vineet M. 
Published: March 2013

BACKGROUND/OBJECTIVESTo examine the associations between perceived control over sleep, noise levels, sleep duration, and noise complaints in a cohort of hospitalized adults.DESIGNProspective cohort study.SETTINGGeneral medicine ward in an academic medical center.PARTICIPANTSOne hundred eighteen hospitalized patients age 50 years and over (mean age, 65 years; 57% female; 67% African American).MEASUREMENTSSleep duration was measured via wrist actigraphy, and noise levels in patient rooms were measured via sound monitors. Validated questionnaires were used to assess sleep characteristics at baseline and sleep quality for each night. Perceived control over sleep was measured at baseline using the Sleep Self‐Efficacy (SSE) scale (range 9–45).RESULTSThe mean SSE score was 32.1 (standard deviation, 9.4), and the median score was 34 (interquartile range, 24–41). Average sleep duration for patients in the hospital was 333 minutes (5.5 hours). Forty‐two percent of patients complained of noise disrupting their sleep. Linear regression clustered by subject showed that above median SSE was associated with longer sleep duration (+55 minutes 95% confidence interval [CI]: 14, 97; P = 0.010). This association remained significant after controlling for objective noise levels and patient demographics (+50 minutes 95% CI: 11, 90; P = 0.014). In logistic regression controlling for noise level and patient demographics, those patients with high SSE were 51% less likely to complain of noise disruptions (odds ratio: 0.49; 95% CI: 0.25, 0.96; P = 0.039).CONCLUSIONHigher perceived control over sleep is associated with longer sleep duration, better sleep quality, and fewer reports of noise disruptions. In addition to noise control, interventions to boost perceived control may improve in‐hospital sleep. Journal of Hospital Medicine 2013;8:184–190. © 2013 Society of Hospital Medicine
Subdigital and subcaudal microornamentation in chamaeleonidae—A comparative study
Authors: Spinner Marlene , Westhoff Guido , Gorb Stanislav N. 
Published: March 2013

AbstractLocomotion on horizontal and vertical substrates requires effective attachment systems. In three clades of arboreal and rupicolous Iguanidae, Gekkota and Scincidae adhesive systems consisting of microscopic hair‐like structures (setae) have been evolved independently. Also the substrate contacting sites on toes and tails of chameleons (Chamaeleonidae) are covered with setae. In the present comparative scanning electron microscopy study, we show that representatives from the chamaeleonid genera Calumma, Chamaeleo, Furcifer, and Trioceros feature highly developed setae that are species‐specific and similar on their feet and tail. These 10 μm long, unbranched setae rather resemble those in anoline and scincid lizards than the larger and branched setae of certain gecko species. In contrast to the thin triangular tips of other lizards, all examined species of the genera Furcifer and Calumma and one of the five examined species of the genus Trioceros have spatulate tips. All other examined species of genera Trioceros and Chamaeleo bear setae with narrowed, fibrous tips. Unlike the setae of other lizards, chamaeleonid setal tips do not show any orientation along the axis of the toes, but they are flexible to bend in any direction. With these differences, the chameleon's unique microstructures on the zygodactylous feet and prehensile tail rather increase friction for arboreal locomotion than being a shear‐induced adhesive system as setal pads of other lizards. J. Morphol., 2013. © 2013 Wiley Periodicals, Inc.
Human papillomavirus genotypes distribution in cervical samples from Uruguayan women
Authors: Ramas Viviana , Mirazo Santiago , Bonilla Sylvia , Mendoza Laura , Lago Olga , Basiletti Jorge , González Joaquin , Picconi Maria Alejandra , Arbiza Juan 
Published: March 2013

AbstractPersistent infection with high‐risk human papillomavirus (HPV) causes cervical preneoplasic lesions and invasive cervical cancer. This study evaluated the prevalence and distribution of HPV genotypes in cervical exfoliated cells from Uruguayan women. Five hundred sixty‐eight cervical specimens were examined by PCR using MY09/11 primer set, and were genotyped by restriction enzyme digestion (RFLP). Some of the samples which remained undetermined were reanalyzed by PGMY PCR combined with reverse line blot hybridization. Overall, about 42% of samples were positive for HPV; 96% in high‐grade squamous intraepithelial lesion, 66% in low‐grade squamous intraepithelial lesion, 15% in atypical squamous cells of undetermined significance, and 19% in samples negative for intraepithelial lesion or malignancy. HPV 16 was the most commonly found genotype, followed by HPV 68 and 58. Within low risk—HPV genotypes 6, 61, and 11 were the most frequent. This is the first cross‐sectional study, accounting for prevalence and genotype distribution of HPV in Uruguayan women. J. Med. Virol. 85:845–851, 2013. © 2013 Wiley Periodicals, Inc.