New CMOS Realization of Voltage Differencing Buffered Amplifier and Its Biquad Filter Applications

In this paper, new biquad filter configuration using a recently introduced active element, namely Voltage Differencing Buffered Amplifier (VDBA), is proposed. This block has high impedance input terminals and low impedance output terminal, providing advantages at voltage mode circuits. Besides, VDBA has a transconductance gain, thus the proposed circuits can be employed without using any external resistors. Two new voltage-mode biquad filter configurations are presented for VDBA application. Each proposed filter employs two active elements and two or three passive components. Filters, having three inputs and single output, can realize voltage-mode low-pass, band-pass, high-pass, band-stop, and all-pass filters. The biquad filters have low output impedances that is necessity for cascadability for voltage mode circuits, and no critical component matching conditions are required. For the second biquad, quality factor can be adjusted via resistor independently of the natural frequency. Simulation results are given to, confirming the theoretical analysis. The proposed biquad filters are simulated using TSMC CMOS 0.35 µm technology. LTSPICE simulations of the proposed circuits give results that agree well with the theoretical analysis

Changes in dietary patterns when females engage in a weight management programme and their ability to meet Scientific Advisory Committee on Nutrition's fibre and sugar recommendations

OBJECTIVE: To investigate how dietary patterns (DP) change following engagement in a weight management programme. Using the DP identified, to study their relationship with weight loss achieved and ability to meet the Scientific Advisory Committee on Nutrition's 2015 fibre and sugar recommendations. DESIGN: Secondary analysis of FFQ data, which collected dietary information at two time points: retrospectively before (T0) and presently during (T1) Slimming World's programme, was analysed. Principal component analysis derived the DP present. SETTING: Online FFQ, hosted by Slimming World (SW) in the UK. PARTICIPANTS: Female SW members (n 325; 17-68 years old). RESULTS: At T0, two DP, 'plant based' and 'processed meat and sugar added by the consumer' were identified. At T1, three DP were identified, 'high meat', 'high fat salt and sugar (HFSS) products' and 'nuts and oils'. Participants with a diet low in 'HFSS products' lost significantly more weight (P for trend = 0·001), were more likely to consume breakfast (P = 0·021) and consumed less free sugar compared with high 'HFSS product' consumers. Those initially presenting with a low 'plant based' diet score lost more weight at T1 (P for trend = 0·046). With engagement, mean fibre intake increased from 24·3 to 32·4 g/d (P < 0·001) and free sugar intake decreased from 12·6 to 8·7 % total dietary energy (P < 0·001). CONCLUSIONS: An individual's DP before and with engagement in a weight management programme may indicate their weight loss success. Advising reduced HFSS product intake may aid initial weight loss. SW appears to promote dietary changes towards UK fibre and sugar recommendations

Efecto estacional sobre el perfil de ácidos grasos de lípidos totales, fosfolípidos y triglicéridos de Mastacembelus mastacembelus (Lago Atatürk Dam, Turquía)

The present study investigated the lipid content and FA profiles of total lipids, phospholipids (PL) and triacylglycerols (TAG) of Mastacembelus mastacembelus from the Atatürk Dam Lake (Turkey). The results showed that the total lipid content of the dorsal muscle varied seasonally from 0.50% to 3.59%. Wide ranges of saturated fatty acids (SFAs) (36.21 to 50.52%) and polyunsaturated fatty acids (PUFAs) (25.22 to 42.02%) were found in the PL fraction. However, higher monounsaturated fatty acids (MUFAs) (37.63 to 45.07%) and SFA (34.71 to 38.82%) were found in TAG (triacylglycerol). The ratios of ω-3 to ω-6 PUFA ranged from 0.65 to 1.32 and 1.07 to 3.48 in PL (phospholipid) and TAG fraction, respectively. The results also showed that the major components were palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1ω-9), palmitoleic acid (C16:1ω-7), docosahexaenoic acid (DHA, C22:6ω-3), arachidonic acid (AA, C20:4ω-6) and docosapentaenoic acid (C22:5ω-3) in total lipid, C16:0, C18:1ω-9, AA and DHA in PL, C16:0, C16:1ω-7, C18:1ω-9, linoleic acid (LA, C18:2ω-6), and DHA in TAG extracted from the muscle of M. mastacembelus in all seasons.En el presente estudio se investigó el contenido de lípidos y los perfiles de ácidos grasos (FA) de lípidos totales, fosfolípidos (PL) y trigliceridos (TAG) de Mastacembelus mastacembelus del lago Atatürk Dam (Turquía). Los resultados mostraron que el contenido lipídico total del músculo dorsal varió estacionalmente de 0,50% a 3,59%. Se encontraron amplios rangos de ácidos grasos saturados (SFA) (36,21 a 50,52%) y ácidos grasos poliinsaturados (PUFA) (25,22 a 42,02%) en la fracción PL. Sin embargo, se encontraron ácidos grasos monoinsaturados (MUFA) más altos (37,63 a 45,07%) y SFA (34,71 a 38,82%) en TAG (triacilglicerol). Las relaciones de AGPI ω-3 a ω-6 variaron de 0,65 a 1,32 y de 1,07 a 3,48 en PL (fosfolípido) y fracción de TAG, respectivamente. Los resultados también muestran que los principales componentes fueron ácido palmítico (C16:0), esteárico (C18:0), oleico (C18:1 ω-9), palmitoleico (C16:1 ω-7), ácido docosahexaenoico (DHA), C22:6 ω-3), ácido araquidónico (AA, C20: 4 ?-6) y ácido docosapentaenoico (C22: 5 ω-3) en lípidos totales, C16:0, C18:1 ω-9, AA y DHA en PL, C16:0, C16:1 ω-7, C18:1 ω-9, ácido linoleico (LA, C18:2 ω-6) y DHA en el TAG extraído del músculo de M. mastacembelus en todas las estaciones

Ultrasonographic and computed tomography findings in retroperitoneal cystic lymphangioma

Retroperitoneal kistik lenfanjioma hayatın erken yıllarında, nadir görülen benign lenfatik sistem tümörüdür. Bu sunumda, radyolojik verilerle retroperitoneal kistik lenfanjioma düşünülen ve histopatolojik bulgularla doğrulanan bir olgunun, ultrasonografi ve bilgisayarlı tomografi bulguları tartışılmaktadır.Retroperitoneal lymphangiomas are uncommon benign tumors usually presenting in early life. In this report the ultrasonographic and computed tomographic findings suggestive of a case of retroperitoneal cystic lymphangioma are presented and discussed along with confirmatory histopathology

Interpratation and adaptation of dermoscopic terminology to our language: Consensus report of the Turkish society of dermatology dermoscopy working group

"Dermoscopic Terminology Consensus Meeting" was held at Ege University Medical Faculty Dermatology Department on the 24th of February in 2012 with the aim of establishing a common language in the translation of the dermoscopic terminology in English literature into Turkish. In this article, the Turkish terminology in which the consensus was reached at that meeting is presented together with the definitions and representative images as a dictionary. © 2013 by Turkish Society of Dermatology

Exploring Vitreous Haze as a Potential Biomarker for Accelerated Glymphatic Outflow and Neurodegeneration in Multiple Sclerosis: A Cross-Sectional Study

Background: The glymphatic system removes neurodegenerative debris. The ocular glymphatic outflow is from the eye to the proximal optic nerve. In multiple sclerosis (MS), atrophy of the optic nerve increases the glymphatic outflow space. Here, we tested whether vitreous haze (VH) can provide novel insights into the relationship between neurodegeneration and the ocular glymphatic system in MS. Methods: This cross-sectional study comprised 315 persons with MS and 87 healthy controls (HCs). VH was quantified from optical coherence tomography (OCT) volume scans. Neurodegeneration was determined on three-dimensional T1 (3DT1) MRI, lesion detection on fluid-attenuated inversion (FLAIR), and layer thickness on OCT. Generalized estimating equations, corrected for age, were used to analyze associations between VH and metrics for neurodegeneration, demographics, and clinical scales. Group differences were determined between mild, moderate, and severe disability. Results: On the group level, VH scores were comparable between MS and control (p = 0.629). In MS, VH scores declined with disease duration (β = −0.009, p = 0.004) and age (β = −0.007, p = 0.001). There was no relation between VH scores and higher age in HCs. In MS patients, VH was related to normalized gray (NGMV, β = 0.001, p = 0.011) and white matter volume (NWMV, β = 0.001, p = 0.003), macular ganglion cell–inner plexiform layer thickness (mGCIPL, β = 0.006, p &lt; 0.001), and peripapillary retinal nerve fiber layer thickness (pRNFL, β = 0.004, p = 0.008). VH was significantly lower in severe compared to mild disability (mean difference −28.86%, p = 0.058). Conclusions: There is a correlation between VH on OCT and disease duration, more severe disability and lower brain volumes in MS. Biologically, these relationships suggest accelerated glymphatic clearance with disease-related atrophy

A novel four-wing chaotic system with multiple equilibriums: Dynamical analysis, multistability, circuit simulation and pseudo random number generator (PRNG) based on the voice encryption

Recently, there has been tremendous interest worldwide in the possibility of using chaos in communication systems. Many different chaos-based secure communication schemes have been proposed up until now. However, systems with strong chaoticity are more suitable for chaos-based secure communication. From the viewpoint of Lyapunov exponents, a chaotic system with a larger positive Lyapunov exponent is said to be more complex. This paper constructing a multistable chaotic system that can produce coexisting attractors is an attractive field of research due to its theoretical and practical usefulness. An innovative 3D dynamical system is presented in this research. It can display various coexisting attractors for the same values of parameters. The new system is more suitable for chaos-based applications than recently reported systems since it exhibits strong multistable chaotic behavior, as proved by its large positive Lyapunov exponent. Furthermore, the accuracy of the numerical calculation and the system's physical implementations are confirmed by analog circuit simulation. Finally, implementing the proposed voice encryption is done using a four-wing chaotic system based on the PRNG

Dermoscopic evaluation of nodular melanoma

Importance: Nodular melanoma (NM) is a rapidly progressing potentially lethal skin tumor for which early diagnosis is critical