On Integral Means for Fractional Calculus Operators of Multivalent Functions

2000 Mathematics Subject Classification: Primary 30C45, Secondary 26A33, 30C80Integral means inequalities are obtained for the fractional derivatives and the fractional integrals of multivalent functions. Relevant connections with various known integral means inequalities are also pointed out

Determination of the recreational park users satisfactions and dissatisfactions factorsRekreasyonel amaçlı park kullanıcılarının memnuniyet ve memnuniyetsizlik faktörlerinin belirlenmesi

The aim of this study was to determine the satisfaction and dissatisfaction factors of the park users. The survey applied on Atatürk Culture Parks, Karaalioğlu Parks and Kepez Urbun Forest which have been selected as the sample areas in three different regions of Antalya. 600 subject were (303 female, 297 male) carried out in this study. Uzun’s (2005) questionnaire which prepared to Dawson, Newman & Watson (1997) and Newman & Dawson’s (1998) studies were used to the determined of user’s satisfaction and dissatisfaction factors in the study. Frequency and percentage analysis were used to analyze participant demographic traits and park user’s characteristics. Independent sample t-test and Oneway Anova tests were used to assess the mean differences in user’s satisfaction and dissatisfaction factors with participant demographic traits and users characteristics. According the findings were park participants’ age range is 26-40, level of education is high school and college, income level is 1000-1500 TL, living time in city is more than 16 years and living place is apartment. According to the results of study the important satisfaction sub-dimensions were accessibility and physical activity, and the important dissatisfaction sub-dimension of park users are maintenance. The findings of the study reveal that participant demographic traits and park user’s characteristics affected the user satisfaction and dissatisfaction level in the park. It’s suggested that when parks designed and being managed with consider these results. ÖzetÇalışmanın amacı, rekreasyonel amaçlı park kullanıcılarının, park kullanımlarına yönelik memnuniyet ve memnuniyetsizlik faktörlerinin belirlenmesidir. Bu çalışmada, Antalya ili merkezinde 3 farklı bölgede bulunan Atatürk Kültür Parkı, Karaalioğlu Parkı ve Kepez Kent Ormanı örneklem alanları olarak seçilmiştir. Her bir alanda 200 olmak üzere toplamda 600 (303 kadın, 297 erkek) kişiye anket uygulaması yapılmıştır. Çalışmada park kullanıcılarının memnuniyet ve memnuniyetsizlik faktörlerini belirlemek amacıyla Uzun’un (2005), Dawson, Newman ve Watson’ın (1997) ve Newman ve Dawson’ın (1998) çalışmalarından yararlanılmıştır. Katılımcıların demografik özellikleri ve park kullanım özelliklerinin analizinde frekans ve yüzde analizi kullanılmıştır. Park alanlarına ait memnuniyet ve memnuniyetsizlik faktörleri ile demografik özellikler ve park kullanım özellikleri arasındaki farkları ortaya koymak için Bağımsız Örneklem t-testi ve Tek Yönlü ANOVA analizi yapılmıştır. Çalışmada park kullanıcılarının, 26-40 yaş aralığında, lise ve üniversite düzeyinde eğitimi olan, çoğunlukla 1000-1500 TL gelire sahip, 16 yıldan uzun süredir kentte ikamet eden, apartman dairesinde ve sitede yaşayan bireyler olduğu görülmektedir. Çalışma sonuçunda, park kullanıcılarının memnuniyetini etkileyen en önemli faktörlerin ulaşılabilirlik ve fiziksel aktivite faktörleri olduğu, memnuniyetsizliği etkileyen en önemli faktörünün ise bakım-onarım faktörü olduğu belirlenmiştir. Katılımcıların demografik özelliklerinin ve park kullanım özelliklerinin memnuniyet ve memnuniyetsizlik fakörlerini etkilediği görülmektedir. Bu doğrultuda yapılacak olan park tasarımlarında ve bu alanların yönetilmesinde bu özelliklerin göz önünde bulundurulması önerilmektedir

Active control of a plasmonic metamaterial for quantum state engineering

We experimentally demonstrate the active control of a plasmonic metamaterial operating in the quantum regime. A two-dimensional metamaterial consisting of unit cells made from gold nanorods is investigated. Using an external laser we control the temperature of the metamaterial and carry out quantum process tomography on single-photon polarization-encoded qubits sent through, characterizing the metamaterial as a variable quantum channel. The overall polarization response can be tuned by up to 33% for particular nanorod dimensions. To explain the results, we develop a theoretical model and find that the experimental results match the predicted behavior well. This work goes beyond the use of simple passive quantum plasmonic systems and shows that external control of plasmonic elements enables a flexible device that can be used for quantum state engineering.Comment: 8 pages, 4 figure

Goos-H\"{a}nchen-like shifts for Dirac fermions in monolayer graphene barrier

We investigate the Goos-H\"{a}nchen-like shifts for Dirac fermions in transmission through a monolayer graphene barrier. The lateral shifts, as the functions of the barrier's width and the incidence angle, can be negative and positive in Klein tunneling and classical motion, respectively. Due to their relations to the transmission gap, the lateral shifts can be enhanced by the transmission resonances when the incidence angle is less than the critical angle for total reflection, while their magnitudes become only the order of Fermi wavelength when the incidence angle is larger than the critical angle. These tunable beam shifts can also be modulated by the height of potential barrier and the induced gap, which gives rise to the applications in graphene-based devices.Comment: 5 pages, 5 figure

‘The Use of Social Media to Foster Trust, Mentorship, and Collaboration in Scientific Organizations

Many domains are well known for their resistance to social media. Currently, there is a dearth of literature that explores social media use in these contexts. This study seeks to help address this gap by evaluating the use of social media within a scientific organization (anonymized as SciCity) that has a strong virtual presence and quarterly face-to-face meet-ups. We evaluated SciCity’s use of social media to foster trust, collaboration, and mentorship. We found that the prominent social media platform Twitter fosters trust among organizational members and plays a role in creating and maintaining lightweight collaborative relationships. Additionally, Twitter-based relationships often act as precursors to collaborations that occur face-to-face. However, Twitter, by itself, was not found to be successful in promoting formal collaborations. Though the medium did facilitate sporadic mentoring, supplementary non-social media-based communication was needed to form mentorship relationships. Twitter was also found to serve as a “social lubricant,” making contact easier and faster, thereby helping foster a scientific social network. Though minor in its role in specifically fostering scientific collaboration, the use of social media by SciCity indicates a shift toward acceptable uses of social media for scientific organizations that have traditionally been hesitant to use social media

Video-Based Hand Movement Analysis of Parkinson Patients before and after Medication Using High-Frame-Rate Videos and MediaPipe

Tremor is one of the common symptoms of Parkinson’s disease (PD). Thanks to the recent evolution of digital technologies, monitoring of PD patients’ hand movements employing contactless methods gained momentum. Objective: We aimed to quantitatively assess hand movements in patients suffering from PD using the artificial intelligence (AI)-based hand-tracking technologies of MediaPipe. Method: High-frame-rate videos and accelerometer data were recorded from 11 PD patients, two of whom showed classical Parkinsonian-type tremor. In the OFF-state and 30 Minutes after taking their standard oral medication (ON-state), video recordings were obtained. First, we investigated the frequency and amplitude relationship between the video and accelerometer data. Then, we focused on quantifying the effect of taking standard oral treatments. Results: The data extracted from the video correlated well with the accelerometer-based measurement system. Our video-based approach identified the tremor frequency with a small error rate (mean absolute error 0.229 (±0.174) Hz) and an amplitude with a high correlation. The frequency and amplitude of the hand movement before and after medication in PD patients undergoing medication differ. PD Patients experienced a decrease in the mean value for frequency from 2.012 (±1.385) Hz to 1.526 (±1.007) Hz and in the mean value for amplitude from 8.167 (±15.687) a.u. to 4.033 (±5.671) a.u. Conclusions: Our work achieved an automatic estimation of the movement frequency, including the tremor frequency with a low error rate, and to the best of our knowledge, this is the first paper that presents automated tremor analysis before/after medication in PD, in particular using high-frame-rate video data

SaFiDe: detection of saccade and fixation periods based on eye-movement attributes from video-oculography, scleral coil or electrooculography data

In this work, we present SaFiDe, a deterministic method to detect eye movements (saccades and fixations) from eye-trace data. We developed this method for human and nonhuman primate data from video- and coil-recorded eye traces and further applied the algorithm to eye traces computed from electrooculograms. All the data analyzed were from free-exploration paradigms, where the main challenge was to detect periods of saccades and fixations that were uncued by the task. The method uses velocity and acceleration thresholds, calculated from the eye trace, to detect saccade and fixation periods. We show that our fully deterministic method detects saccades and fixations from eye traces during free visual exploration. The algorithm was implemented in MATLAB, and the code is publicly available on a GitHub repository. The algorithm presented is entirely deterministic, simplifying the comparison between subjects and tasks. Thus far, the algorithm presented can operate over video-based eye tracker data, human electrooculogram records, or monkey scleral eye coil data

Electrochemical degradation of Diclofenac on catalysts based on CNT and M/CNT modified electrodes

Diclofenac (DCF) - a nonsteroidal anti-inflammatory drug - is one of the most frequently detected pharmaceutical compounds in the aquatic environment. Because of its negative effects on public health and environment, this emerging pollutant monitoring and removal from wastewater are of high importance. Electrochemical oxidation has attracted growing interest in the last years, due to its versatility, high efficiency and environment compatibility.Electrochemical oxidation of DCF has been studied using multiwalled carbon nanotubes (CNT) and monometallic catalysts based on carbon nanotubes (M/CNT), at different pH media. The electroreactivity of DCF on modified electrodes and the kinetic parameters of the redox reactions were determined using cyclic voltammetry. Electrodegradation of DCF in aqueous medium was carried out using long-term electrolyses. The products of these electrolyses were identified and quantified by HPLC-MS, GC-MS, HPLC-UV-RID and IC.BioTecNorte (operation NORTE-01-0145-FEDER-000004) and “AIProcMat@N2020 -Advanced Industrial Processes and Materials for a Sustainable Northern Region of Portugal 2020”, NORTE-01-0145-FEDER- 000006, supported by the Northern Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF). This work also has been funded by national funds (FCT, Fundação para a Ciência e a Tecnologia), through the projects: PTDC/AAGTEC/5269/2014, Centre of Chemistry (UID/QUI/00686/2013 and UID/QUI/0686/2016) and LSRE-LCM (POCI-01-0145-FEDER-006984)info:eu-repo/semantics/publishedVersio