bluuebunny/crossref_metadata_2025_split huggingface dataset:
Speech and language adverse effects after thalamotomy and deep brain stimulation in patients with movement disorders: A meta‐analysis
Authors: Alomar Soha , King Nicolas K.K. , Tam Joseph , Bari Ausaf A. , Hamani Clement , Lozano Andres M. 
Published: January 2017

ABSTRACTBackground: The thalamus has been a surgical target for the treatment of various movement disorders. Commonly used therapeutic modalities include ablative and nonablative procedures. A major clinical side effect of thalamic surgery is the appearance of speech problems.Objective:This review summarizes the data on the development of speech problems after thalamic surgery.Methods: A systematic review and meta‐analysis was performed using nine databases, including Medline, Web of Science, and Cochrane Library. We also checked for articles by searching citing and cited articles. We retrieved studies between 1960 and September 2014.Results: Of a total of 2,320 patients, 19.8% (confidence interval: 14.8–25.9) had speech difficulty after thalamotomy. Speech difficulty occurred in 15% (confidence interval: 9.8–22.2) of those treated with a unilaterally and 40.6% (confidence interval: 29.5–52.8) of those treated bilaterally. Speech impairment was noticed 2‐ to 3‐fold more commonly after left‐sided procedures (40.7% vs. 15.2%). Of the 572 patients that underwent DBS, 19.4% (confidence interval: 13.1–27.8) experienced speech difficulty. Subgroup analysis revealed that this complication occurs in 10.2% (confidence interval: 7.4–13.9) of patients treated unilaterally and 34.6% (confidence interval: 21.6–50.4) treated bilaterally. After thalamotomy, the risk was higher in Parkinson's patients compared to patients with essential tremor: 19.8% versus 4.5% in the unilateral group and 42.5% versus 13.9% in the bilateral group. After DBS, this rate was higher in essential tremor patients.Conclusion: Both lesioning and stimulation thalamic surgery produce adverse effects on speech. Left‐sided and bilateral procedures are approximately 3‐fold more likely to cause speech difficulty. This effect was higher after thalamotomy compared to DBS. In the thalamotomy group, the risk was higher in Parkinson's patients, whereas in the DBS group it was higher in patients with essential tremor. Understanding the pathophysiology of speech disturbance after thalamic procedures is a priority. © 2017 International Parkinson and Movement Disorder Society
Compact dual‐band bandpass filter based on dual‐mode modified star shaped resonator
Authors: Avinash K.G. , Srinivasa Rao I. 
Published: January 2017

ABSTRACTIn this article, a compact dual‐mode dual‐band bandpass filter with adjustable second passband using a star shaped resonator is proposed. It is loaded with two T‐shaped stepped impedance stubs inside the resonator and these stubs introduce a transmission zero on the upper side of the first passband. A small triangular perturbation element attached to the star loop resonator excites dual degenerate modes and is responsible for the first passband with two transmission poles. Two U‐shaped slots etched on the ground plane control second passband frequency which is derived from the first harmonic. It also helps in attaining two transmission poles in the second passband. Unlike, the conventional orthogonal feed used for dual mode filters, the proposed filter is fed by two arrow shaped feed lines oriented along the straight line and are parallel coupled to the resonator. Finally, a dual‐mode dual‐band bandpass filter is designed and fabricated for WLAN application and the dimensions of proposed filter are 16 mm × 17.32 mm. Measured results of the filter show good agreement with the Full‐Wave simulated results. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:505–511, 2017
Phase correction of the electric field for a dielectric loaded substrate integrated waveguide H‐plane horn antenna
Authors: Gong Liang , Chan King Yuk , Ramer Rodica 
Published: January 2017

ABSTRACTThis article presents a simple graphical method for introducing phase correction in the electric field for a dielectric loaded substrate integrated waveguide H‐plane sectorial horn antenna. An additional pair of rectangular patches with the dielectric loading to the horn antenna provides significant reduction of sidelobe level while maintaining similar gains and beamwidths. Phase plots generated by CAD help explaining the phase correction mechanism and designing. Our studies demonstrated that the reduction of the sidelobe bandwidth is up to 20% of the center frequency. The fabricated antenna operates at 22.7 GHz, and the measured radiation patterns are in good agreement with the simulation results. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:584–588, 2017
An ultra‐slow‐wave transmission line on CMOS technology
Authors: Arigong Bayaner , Ren Han , Ding Jun , Chung Hoon‐Ju , Jung Sungyong , Kim Hyoungsoo , Zhang Hualiang 
Published: January 2017

ABSTRACTIn this letter, utilizing multimetal layers in the CMOS process, an ultra‐slow‐wave on‐chip coplanar waveguide (CPW) transmission line with interdigital loaded stubs and floating strips is proposed. From the full‐wave 3D EM simulation and measurement results, it is found that the proposed on‐chip transmission line features smaller size and lower loss comparing to traditional on‐chip CPW transmission lines. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:604–606, 2017
A compact frequency reconfigurable CPS‐like metamaterial‐inspired antenna
Authors: Nasir Usman , Afzal Athar S. , Ijaz Bilal , Alimgeer Khurram S. , Farhan Shafique Muhammad , Saeed Khan Muhammad 
Published: January 2017

ABSTRACTA compact frequency reconfigurable coplanar stripline (CPS)‐like metamaterial antenna for WLAN and GSM applications is proposed in this article. A unique CPS structure is used to exploit the properties of metamaterial and it is being inspired from an epsilon‐negative transmission line (ENG‐TL). The main objective of using this structure is to simplify the geometry and to achieve frequency reconfigurable operation. The proposed antenna of size 40 × 40 × 1.524 mm3 with acceptable gain and radiation pattern will operate at two switching frequencies 1.8 GHz for GSM and 2.4 GHz for WLAN, respectively. Parametric analysis of the proposed antenna unit cell is performed using ADS in which by tuning the unit cell parameters WLAN band is achieved. To achieve the frequency reconfigurable property, RF PIN diode model is implemented on the antenna structure. Results of the prototype of antenna are compared with the simulated results. A close agreement is found between the measured and the simulated results. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:596–601, 2017
Electrical properties of niobium pentoxide (NB2O5) for application in microstrip antenna substrate
Authors: de Souza Danilo , de Almeida Silveira Jorge Henrique , da Silva Isaac Barros Tavares , de Sousa Queiroz Júnior Idalmir , Nogueira Fraga Francisco Edson , de Andrade Humberto Dionísio , da Silva Rodolfo Bezerra , Travassos Junior Xisto Lucas 
Published: January 2017

ABSTRACTThis article presents a parameters investigation of microstrip antenna substrate produced by niobium pentoxide (Nb2O5) powder metallurgy. Theoretical studies and experimental measurements of the substrate electrical properties were performed. The niobium pentoxide compaction pressure and the sintering temperature were studied in order to determine a relationship between pressure, temperature and electrical properties, aiming to apply to a microstrip patch antenna. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:641–645, 2017
Design and analysis of compact BPF with dual notch bands based on stepped‐impedance resonator for UWB applications
Authors: Nouri Sh. , Nourinia J. , Ghobadi Ch. , Alizadeh F. , Mohammadi B. 
Published: January 2017

ABSTRACTIn this study, a compact ultra‐wide band (UWB) bandpass filter (BPF) with improved out‐of‐band performance and dual notch bands operation is suggested and its design and analysis procedure is discussed. In the suggested BPF, etching slot in the ground plane is employ to meliorate the out‐of band efficiency of the filter. In addition, four short‐circuited folded stubs are used to enhance the selectivity of the BPF at its cutoff frequencies. The upper stop‐band with more than 20dB attenuation level extends to 20 GHz. Dual notch bands function is added to the performance of the filter by coupling two stepped‐impedance resonator (SIR) to the filter primary resonator. It is shown that the frequency locations of the notch bands can be adjusted by varying the impedance ratio of the embedded SIR. The constructed prototype has a small size and is able to coverage frequency band of 2.97–11.18 GHz with dual notch bands function at 5.5–6.3 and 7.84–9.06 GHz, which suppresses the interference between UWB spectrum with WLAN and satellite communication frequency bands, respectively. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:672–674, 2017
Bidirectional same‐sense circularly polarized antenna using slot‐coupled back‐to‐back patches
Authors: Hou Yuefeng , Li Yue , Chang Le , Zhang Zhijun , Feng Zhenghe 
Published: January 2017

ABSTRACTIn this letter, a dual‐patch antenna with bidirectional circular polarization of the same sense is proposed for coal mine and tunnel communications and positioning systems. The proposed antenna consists of two back‐to‐back patches with a common ground plane. We only feed one patch on the front side by microstrip feeding line, and the energy is coupled to the other patch on the back side through a slot, which is etched on the common ground. By properly truncating the corners of the dual patches, bidirectional radiation pattern is achieved with the right‐hand circular polarization on both front and back sides. Compared to previous designs for the same purpose, the proposed antenna is with a compact structure using only two layers of substrate and without using complex feeding networks, benefiting from the merits of small dimension, low cost, and easy fabrication. We have built the antenna prototype and taken the measurement. The measured impedance bandwidth for S11<−10 dB is 90 MHz (2.44–2.53 GHz), and the measured 3‐dB axial‐ratio bandwidth is 20 MHz (2.455–2.475 GHz), agreeing well with the simulated results. The measured peak right hand circularly polarization gains are 3.70 dBic and 3.09 dBic for front and back directions. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:645–648, 2017
An improved parametric analysis of CSRR loaded with microstrip line for ultra wide band frequency range
Authors: Sarkar Dwipjoy , Moyra Tamasi 
Published: January 2017

ABSTRACTIn this letter, an improved electrical parameter extraction scheme for the microstrip line loaded with complementary split ring resonator (CSSR) is proposed. A CSRR loaded with microstrip line behaves as an effective negative permittivity media. The equivalent circuit of CSRR contains four electrical quantities and it needs four different characteristic frequencies for their accurate solution which was neglected in previous studies. In this work, a four variable problem is formulated and solved which accurately gives all the electrical parameters of CSRR equivalent circuit for ultra wide frequency range. The proposed technique is used for a parametric analysis of a rectangular CSRR unit cell. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:661–664, 2017
A modified PiBVD model for LAMB wave resonator
Authors: Wang Yong , Hong Yan , Goh Wang Ling , Mu Xiaojing 
Published: January 2017

ABSTRACTThe advances in semiconductor fabrication technologies have enabled the integration of Lamb‐wave resonator on silicon substrate. But such integration has led to additional parasitic effects to the Lamb‐wave resonators. The availability of an efficient equivalent‐circuit model is thus vital. This paper proposes a modified hybrid π‐type/Butterworth‐Van Dyke (PiBVD) model. Compared with the conventional PiBVD model, the modified PiBVD model accounts for the parasitic inductances of the bonding wires. It therefore provides better accuracy when characterizing Lamb‐wave resonators over a wide frequency range. Experiment results have also verified that the modified PiBVD model has better fitting on Y11 (input reflection factor in Y‐parameter matrix). This improvement is greatly beneficial for resonator analysis and circuit designs © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:703–706, 2017
Developing high performance Q‐band planar filters using the multilayered substrate integrated waveguide technique
Authors: Hao Zhang Cheng , Kong Fang Fang 
Published: January 2017

ABSTRACTIn this article, a novel planar multilayer Q‐band band‐pass filter is presented by cascading a low‐pass filter (LPF)and a high‐pass filter (HPF). The HPF is designed by utilizing the high‐pass behavior of the substrate integrated waveguide, and the LPF is realized by using millimeter‐wave lump‐element resonators. Since the insertion loss resulted by the millimeter‐wave planar resonators, which resonate in‐band and have a limited quality factor, is avoided by using the cascaded high‐/low‐pass architecture, the proposed filter has a small insertion loss. Moreover, a flexible bandwidth can be achieved by properly adjusting the cutoff frequencies of the HPF and LPF. As a demonstration, a band‐pass filter having a center frequency of 42.5 GHz and a fractional bandwidth of 11.76% is designed, fabricated, and measured. Good agreement is obtained between simulated and measured results. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:698–703, 2017
Design and development of wideband RDRA FED with parallel conducting strips chamfered at edges separated by partial matching slab
Authors: Vasisht Parikshit , Chattoraj N. 
Published: January 2017

ABSTRACTIn this article, a compact wideband rectangular dielectric antenna fed using parallel standing strips chamfered at the edges with partial dielectric matching slab is proposed for upper C‐band and X‐band applications. Inclusion of the external conducting strip helps in reducing the size of the DRA, facilitates greater ease of fabrication, and helps in shifting the resonant frequency without varying the size of the DRA. Also chamfering the edges of the conducting strips eradicates the discontinuities in the reactance and thus enhances the bandwidth by 10–12%. Two DRAs with dimensions 4.8 mm × 9.6 mm × 10.6 mm were fabricated. The designed antenna has the broad bandwidth ranging from 6.5 to 13.1 GHz. The proposed antenna has the return loss of −45 dB at 7.0 GHz and the impedance bandwidth up to 75% is achieved. The low value of VSWR suggests that the antenna is broadly lossless. Moreover, a comparison with the DRA fed without the partial conducting strip shows that the size of the DRA is reduced considerably around 25%. A parametric study of the variation with external partial conducting strip and internal conducting strip is also carried out. The measured results and the simulated results of the proposed RDRA (Rectangular Dielectric Resonator Antenna) match considerably well with each other. The proposed antenna has an omni‐directional broadband pattern having the gain of 6.0 dBi. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:695–698, 2017
Low‐profile bowtie antenna with 3D printed substrate
Authors: Mirzaee M. , Noghanian S. , Chang I. 
Published: January 2017

ABSTRACTThis article describes the design and implementation of a compact bowtie antenna with a three‐dimensional (3D) printed substrate and coplanar stripline feed structure. The electrical properties of the 3D printed substrate were measured using a Keysight high performance dielectric probe. The proposed bowtie antenna was designed, simulated, and fabricated at the center frequency of 2.6 GHz. The proposed method provides a cost‐effective manufacturing method with good performance. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:706–710, 2017
Liraglutide causes large and rapid epicardial fat reduction
Authors: Iacobellis Gianluca , Mohseni Mahshid , Bianco Suzy D. , Banga Pritisheel K. 
Published: January 2017

ObjectiveEpicardial adipose tissue (EAT), the visceral fat depot of the heart, is a modifiable cardiovascular risk factor and emerging therapeutic target. Liraglutide, an analog of glucagon‐like peptide‐1, is indicated for the treatment of type 2 diabetes mellitus. Liraglutide has recently been shown to reduce cardiovascular risk. Nevertheless, whether liraglutide could reduce EAT is unknown.MethodsTo test the hypothesis, a 6‐month randomized, open‐label, controlled study was performed in 95 type 2 diabetic subjects with body mass index (BMI) ≥27 kg/m2 and hemoglobinA1c ≤8% on metformin monotherapy. Individuals were randomized in two groups to receive additional liraglutide up to 1.8 mg s.c. once daily (n = 54) or to remain on metformin up to 1,000 mg twice daily (n = 41). Ultrasound‐measured EAT thickness was measured at baseline and at 3‐ and 6‐month follow‐ups.ResultsIn the liraglutide group, EAT decreased from 9.6 ± 2 to 6.8 ± 1.5 and 6.2 ± 1.5 mm (P < 0.001), accounting for a −29% and −36% of reduction at 3 and 6 months, respectively, whereas there was no EAT reduction in the metformin group; BMI and hemoglobinA1c improved only in the liraglutide group after 6 months.ConclusionsLiraglutide causes a substantial and rapid EAT reduction. Liraglutide cardiometabolic effects may be EAT‐mediated.
Depression and religiosity and their correlates in Lebanese breast cancer patients
Authors: Abou Kassm Sandra , Hlais Sani , Khater Christina , Chehade Issam , Haddad Ramzi , Chahine Johnny , Yazbeck Mohammad , Abi Warde Rita , Naja Wadih 
Published: January 2017

AbstractBackgroundBreast cancer bears considerable morbidity and mortality and is well known to increase the risk of major depression, whereas religiosity has been reported to be protective.We searched for an association between depression and religiosity in breast cancer patients. We also sought to find an association between depression and various sociodemographic and disease variables.MethodsOne hundred two patients were interviewed. Sociodemographic, cancer profile, and religiosity questionnaires were administered. We screened for depressive disorders by using the Mini‐International Neuropsychiatric Interview and the Beck Depression Inventory.ResultsMost of our participants (n = 79; 77.4%) had high religiosity score. The prevalences of lifetime major depression, current major depression, and major depression after cancer diagnosis were 50.9%, 30.1%, and 43.1%, respectively.We could not find a correlation between religiosity and current depression, while the association with depression after cancer diagnosis was close to but did not reach statistical significance (P = .055) and in favor of a deleterious role of religiosity. Depression was only linked to marital status and insurance coverage. No association was found with disease‐related variables.ConclusionsReligiosity does not seem to be protective against depression development. The stress of cancer appears to be the main culprit in increasing the risk of depression.
Breast Cancer Risk Assessment at the Time of Screening Mammography: Perceptions and Clinical Management Outcomes for Women at High Risk
Authors: Morman Nichole A. , Byrne Lindsey , Collins Christy , Reynolds Kelly , Bell Jeffrey G. 
Published: January 2017

AbstractThe purpose of this study was to evaluate the utility of a breast cancer risk assessment (BCRA) at the time of screening mammogram. Women whose BCRA indicated a high risk for cancer received a letter with instructions for breast health care and genetic counseling if appropriate. After 6 months this group received surveys to evaluate their risk perception and their recall of, and compliance with, recommendations. We also explored the impact of other variables such as a recommendation for genetic counseling and physician communication with the women. After the BCRA, the majority of high risk women reported no change in their perceived risk of cancer. A woman's perceived risk of cancer after a BCRA was significantly associated with her recall of recommendations for breast health care, but not with compliance. A recommendation for genetic counseling was not significantly related to women's perceived risk of cancer after the BCRA. Ten percent of women who should have obtained genetic counseling actually completed an appointment. Women who discussed their BCRA results with their physicians were more compliant with a six month breast exam with a doctor (53% vs 17%, p = 0.018). Overall, women felt that the BCRA was helpful and did not cause undue stress or anxiety. Although the cohort's compliance with recommendations was suboptimal, physicians’ interactions with their patients may have a positive influence on their compliance.
Psychiatric comorbidity in African patients with epilepsy – Experience from Sierra Leone
Authors: M’bayo Tenema , Tomek Michal , Kamara Clifford , Lisk Durodami 
Published: January 2017

AbstractObjective Epilepsy is associated with a significant burden of psychiatric comorbidity, including depression and anxiety disorders. However, paucity of data exists regarding the impact of epilepsy on mental health of patients in the setting of sub-Saharan Africa, where these comorbidities are under-recognized and under-treated. We carried out a cross-sectional descriptive study to investigate the prevalence and determinants of depression and anxiety among people with epilepsy in Sierra Leone.Method A screening tool previously validated in the primary healthcare setting in Zambia was administered to adult patients in our epilepsy clinics in Freetown and Kenema, Sierra Leone. In addition, various socio-demographic and clinical characteristics were recorded for each patient.Results A total of 142 patients were included. The mean screening score was 16.3 out of 40, with 39 (27.5%) patients scoring above the diagnostic cut-off point for anxiety and/or depression. Variables showing a significant association with the presence of psychiatric comorbidity included female gender (p = 0.015), seizure frequency of >2 per month (p = 0.001), and self-reporting of sedation and/or dizziness as side effects of anti-epileptic medications (p = 0.006).Conclusion Symptoms of anxiety and depression are common in epilepsy patients in Sierra Leone. Given the significant negative impacts of such comorbidity on those affected, primary healthcare workers in sub-Saharan countries should be trained to inquire about anxiety and depression symptoms in epilepsy patients, and implementation of screening programs should be considered.
AN EXPLANATORY CHALLENGE FOR EPISTEMOLOGICAL DISJUNCTIVISM
Authors: Boult Cameron 
Published: January 2017

ABSTRACTEpistemological Disjunctivism is a view about paradigm cases of perceptual knowledge. Duncan Pritchard claims that it is particularly well suited to accounting for internalist and externalist intuitions. A number of authors have disputed this claim, arguing that there are problems for Pritchard's way with internalist intuitions. I share the worry. However, I don't think it has been expressed as effectively as it can be. My aim in this paper is to present a new way of formulating the worry, in terms of an “explanatory challenge”. The explanatory challenge is a simple, yet powerful and illuminating challenge for Epistemological Disjunctivism. It is illuminating in the sense that it shows us why Epistemological Disjunctivism must take on certain internalistically problematic commitments. A secondary aim of this paper is to examine whether the recently much-discussed distinction between justifications and excuses in epistemology can support an adequate response. I will argue that it cannot.