bluuebunny/crossref_metadata_2025 huggingface dataset:
Equivalent Circuit Model for Convoluted Meander Line Frequency Selective Surface for Multi-frequency Applications
Authors: Jeyaraman Deepa , Santhanam Suganthi
Published: December 2024

This research investigates a multi-resonant frequency selective surface (FSS) structure with convoluted meander line. An equivalent circuit analysis was conducted in three different 10×10 array structures having 200 mm × 200 mm size with 10 mm × 10 mm unit cell. The simple plus structure achieved a single resonant frequency of 10 GHz at −27 dB, dual frequencies of 4.6 GHz at −22 dB and 11.6 GHz at −28 dB while increasing the length of meander lines to three turns. By adding an extra six turns for a total of nine turns, the structure achieved three resonant frequencies of 3.4G Hz at −28 dB, 10.6 GHz at −22 dB and 16 GHz at −20 dB. The polarization insensitivity and transmission coefficient in transverse electric (TE) and transverse magnetic (TM) modes has been validated with the equivalent circuit model (ECM) and tested with measurement also. The result demonstrates that the proposed FSS can be applied for WiMax, X and Ka-band wireless communication and radar systems applications.
Novani Brindes: Novo Público, Nova Estratégia de Marketing Digital
Authors: Corrêa Stela Cristina Hott , De Oliveira Santos Naiara , Soares da Silva Roberta , Esmeralda Rodrigues Miguel Karen
Published: December 2024

A Novani é uma empresa de brindes que atua no mercado corporativo. Ela possui extensa linha de produtos personalizados e seu marketing digital é o seu trunfo para a geração de novas vendas. Porém, as pessoas físicas começam a demandar presentes personalizados e a gerente de marketing resolve interagir com elas por meio das estratégias digitais utilizadas com o público corporativo. A princípio o novo segmento responde positivamente, no entanto, rapidamente nota-se que a estratégia de marketing digital que é adequada para o público de brindes corporativos parece não ser propícia para o mercado B2C. A gestora de marketing se depara, então, com a queda das métricas do marketing digital como a diminuição da taxa de engajamento nas postagens, do tempo médio em que os visitantes ficam no e-commerce, e do número de páginas abertas por visita no e-commerce. Diante dessas quedas, ela deve reformular a estratégia de marketing digital para o novo segmento. Para subsidiar a sua decisão, ela contrata uma pesquisa de marketing que identifica o perfil do novo público-alvo, o valor percebido pelos clientes nos presentes personalizados e a descrição da jornada do cliente de presentes personalizados. Os alunos são convidados a se colocarem no lugar da tomadora de decisão para propor uma estratégia de marketing digital para o público do mercado B2C da Novani.
Enhancing Single Cell Phase Contrast Imaging: Intracellular Specificity via Advanced Flow Tomography
Authors: Ferraro Pietro
Published: December 2024

We show that flow-tomography could enhance intracellular specificity in Single Cell Phase-Contrast Imaging filling the gap toward fluorescent microscopy. Strategies and techniques for precise cellular extraction and 3Dv-isualization are investigated promising insights into cellular biology.

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Exploring Laser-Induced Fluorescence as a Process Analytics Method for Dissolved Oxygen
Authors: Kosterev Anatoliy A.
Published: December 2024

Laser-induced fluorescence of oxygen in organic solvents is considered for a contactless process analytics method. Neither a photosensitizer nor singlet oxygen traps were added to solvents. Singlet oxygen self-quenching and solvent contamination effects reported.
In-Situ Characterization of Combustion in Methane Flares Using Standoff Infrared Laser Spectroscopy
Authors: Phillips Mark
Published: December 2024

A broadband swept-wavelength external cavity quantum cascade laser measures CO, CO2, H2O, and temperature, while a tunable diode laser measures CH4, providing standoff and in-situ measurements of combustion efficiency within methane flares.

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Rapid identification of microplastics through spectral reconstruction from RGB images
Authors: Li Yuxing , Huang Jianqing , Chen Jingyan , Lam Edmund Y.
Published: December 2024

We propose a method to generate hyperspectral bands and extract spectral signatures from RGB images. Experimental results validate its efficacy in streamlining microplastic identification through comprehensive spectroscopic analysis and reducing imaging time requirements.
Structured Light from Structured Plasma: Manipulating Extreme Lasers with Plasma Optics
Authors: Edwards M. R. , Fasano N. M. , Perez-Ramirez V. M. , Wang M. M. , Ou K. , Cao S. , Seyler D. , Giakas A. , Michel P. , Mikhailova J. M.
Published: December 2024

Plasma volume diffraction optics enable the holographic manipulation of high-intensity beams of light. By varying plasma density with micron precision, high-damage-threshold gratings, lenses, and holograms can be created for compact ultra-high-power laser systems.
Dephasingless Laser Wakefield Acceleration in the Bubble Regime
Authors: Miller Kyle G. , Pierce Jacob R. , Ambat Manfred V. , Shaw Jessica L. , Weichman Kale , Mori Warren B. , Froula Dustin H. , Palastro John P.
Published: December 2024

An ultrashort flying-focus pulse created by an axiparabola and radial echelon drives a dephasingless laser wakefield accelerator in the bubble regime. Simulations show that 25 pC of ionization-injected electrons gain 2.1 GeV over 20 dephasing lengths (1.3 cm), with projected energy gains of 125 GeV over <1 m.
Breaking the Beachfront Limitations with Silicon Photonics
Authors: Totovic Angelina , Abhyankar Abhijit , Aggarwal Ankur , Bamiedakis Nikos , Bekker Zoltan , Benromdhane Mohamed , Bergstein Nadav , Bos Ties , Davies Christopher , Gimlett Andrew , Han Xiaoping , Mahadevaiah Kavya , Ozguc Hakki , Park Kevin , Ramachandra Sujit , Redgrave Jason , Sahni Subal , Singh Ajmer , Staffaroni Matteo , Vats Saurabh , Winterbottom Phil , Woodhouse Darren , Younis Waleed , Yu Shifeng , Lazovsky David
Published: December 2024

We present a 2.5D integrated photonics platform for optical connectivity to the point-of-compute in high-power ASICs. Relying on electro-absorption modulators, the platform features exceptional temperature stability, low latency, and high bandwidth density.
Anterior Eye Optical Imaging and Correction
Authors: Marcos Susana
Published: December 2024

Future eye corrections will focus on customizing treatments based on patient-specific optomechanical eye models derived from 3D Quantitative Anterior Segment Optical Coherence and Elastography. This approach enhances understanding and optimization of treatments for myopia, presbyopia, and keratoconu

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3D-Printed Glass Micro-Optics for Biomedical Imaging Applications
Authors: Liang Rongguang
Published: December 2024

This presentation will highlight advances in 3D-printed glass optics, showcasing their impact on biomedical imaging technologies like microscopes and endoscopes, while addressing challenges and future developments in 3D printing optics.

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Adiabaticity Engineering in Guided Wave Optics
Authors: Chung Hung-Ching , Chen Chih-Hsien , Hung Yung-Jr , Tseng Shuo-Yen
Published: December 2024

Adiabatic mode evolution is an important concept in guided wave optics. We describe various approaches to engineer device adiabaticity, including fast quasiadiabatic dynamics, adiabaticity engineering, and adiabaticity map, leading to robust devices with small footprints.

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Nano-Mechanical Photonic Integrated Circuits with Quantum Dots
Authors: Midolo Leonardo
Published: December 2024

I will present recent advances in generating and routing single photons on-chip using quantum dots and reconfigurable photonic devices based on nano-mechanical motion and discuss the challenges in scaling up the technology further.

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Non-reciprocal devices for in-memory photonic computing
Authors: Youngblood Nathan , Pintus Paolo , Dumont Mario , Shah Vivswan , Murai Toshiya , Shoji Yuya , Huang Duanni , Bowers John
Published: December 2024

Non-reciprocal platforms can offer several key advantages for scalable and efficient photonic computing. In this talk, I will present our recent experimental work validating the use of non-reciprocal materials to implement high-endurance memory for photonic computing.

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3D Diffuser Encoded Imaging and Physics-Informed Neural Network Reconstruction
Authors: Glosemeyer Tom , Lich Julian , Kuschmierz Robert , Czarske Juergen
Published: December 2024

Minimally invasive fiber endoscopy offers a high potential for biomedical imaging applications. By utilizing a diffuser for encoding and a coherent fiber bundle in conjunction with neural networks for reconstruction, single-shot 3D imaging enabled.

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Single-Molecule Localization Microscopy and Molecular Diffusion in the Brain Tissue Complexity
Authors: Cognet Laurent
Published: December 2024

By combining single particle tracking of near-infrared-emitting carbon nanotubes with analytical methods derived from single-molecule localization microscopy, we reveal the nanoscale organization of the extracellular space of living brain tissue in healthy and pathological conditions.

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Fast rotating blade temperature imaging using a submicrosecond thermographic phosphor
Authors: Kasapis Georgios , Nicolas Francois , Delva Jerome , Dalipi Linda , Fond Benoît
Published: December 2024

Blur-free temperature imaging of a fast rotating propeller blade is performed using an interframe camera in dual frame mode and a thermographic phosphor (CaS:Eu2+) paint with a temperature-sensitive lifetime in the sub-microsecond range.
Integrated Mid-Infrared System for Concurrent Open-path Gas Sensing and Optical Communication
Authors: Elkhazraji Ali , Sait Mohammed , Farooq Aamir
Published: December 2024

This paper demonstrates the first simultaneous open-path optical communication and gas concentration (H2S) sensing using a single 8-µm quantum cascade laser. The dynamics between communication and sensing using the same optical path are investigated.
Hybrid fs/ps CARS thermometry of CO2 in nanosecond-pulsed discharges
Authors: Thompson Ryan J. , Elkowitz Laurie , Dedic Chloe E.
Published: December 2024

Hybrid fs/ps CARS temperature measurements of CO2, N2, and CO were performed in an atmospheric-pressure nanosecond repetitively pulsed dielectric barrier discharge. The time- and concentration-dependence of the discharge temperature is presented.
Spatio-temporal Mapping of Nanosecond-pulsed High-frequency Discharges for Ignition Applications
Authors: Ombrello Timothy
Published: December 2024

Diagnostic strategies of emission spectroscopy, infrared imaging thermometry, and O and OH laser-induced fluorescence were used to characterize the spatio-temporal processes of energy deposition and ignition kernel development when using nanosecond-pulsed high-frequency discharges.
Resonantly Ionized Photoelectron Thermometry (RIPT)
Authors: Zhang Zhili , McCord Walker , Gragston Mark , Clark Aleksander
Published: December 2024

One-dimensional (1D) Oxygen-tagging and Nitrogen-tagging Resonantly Ionized Photoelectron Thermometry technique was developed and used to characterize linewise thermal gradients present within ambient air, high-speed flows, and large-scale Mach 4 Ludwieg tube.
Mid-infrared Dual-comb Spectroscopy using Difference Frequency Generation for SO2 Gas Detection
Authors: Ahmad Syed Tajammul , Moretti Luca , Walsh Mathieu , Gatti Davide , Genest Jerome , Marangoni Marco , Farooq Aamir
Published: December 2024

Presented is the comb-resolved dual-comb spectroscopy spanning 7.5-11.5 μm, utilizing Erbium-fiber oscillators. SO2 spectral line detection confirms HITRAN line parameters. The scheme offers multispecies detection with high-resolution and rapid-acquisition, vital for environmental monitoring and chemical kinetic applications.
Ammonia-Nitrogen Gas Phase Diagnostics Applying Laser-Induced Electrostrictive and Thermal Gratings
Authors: Hölzer Jonas I. , Kozlov Dimitrii N. , Seeger Thomas
Published: December 2024

Pump-laser absorption of ammonia at 1064nm may generate a thermal contribution to a laser-induced grating (LIG) in ammonia-nitrogen gas mixtures. We demonstrate a simplified approach for simultaneous mixture composition and temperature evaluation in this system using the LIG technique.
Compact Platforms for Cold-Atom Clocks
Authors: Riis Erling , Griffin Paul , Arnold Aidan , McGilligan James
Published: December 2024

We examine solutions for miniaturizing atomic clocks for performance at the 10^-15 level. Microwave and optical interrogation of a rubidium microwave clock are highlighted. MEMS and additively manufactured vacuum and spectroscopy cells will be presented.

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Advancing Toward Scientific Quantum Advantage
Authors: Svore Krysta
Published: December 2024

We’ve entered the era of reliable quantum computing. Hear more about the most reliable logical qubits on record, and the path to scientific quantum advantage through the collective advancement of AI, supercomputing, and quantum.

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Towards a Practical Quantum Repeater
Authors: Namazi Mehdi
Published: December 2024

Abstract not available.

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Sub-Wavelength Spatial Light Modulator Enabling Compact Holographic Augmented Reality
Authors: Kaczorowski Andrzej , Buckley Edward , Stahl Richard , Choutov Dmitri , Marescaux Theodore , Noonen Michael
Published: December 2024

Augmented Reality holds potential to transform our daily lives, but adoption has been limited. Holography overcomes many shortcomings of current AR. We review the history of Holographic Augmented Reality and present recent developments at Swave.

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Reconfigurable Optical Random Neural Network for Large-Scale Optical Data Science
Authors: Xia Fei
Published: December 2024

We will discuss our recent progress on deep optical random neural network design using complex media capable of performing large-scale training and inference in situ.

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Metasurfaces for Future Sensing and Imaging Technologies
Authors: Brongersma Mark
Published: December 2024

I will discuss how metasurface functionalities can start to impact a variety of optical sensing and imaging technologies. I will explain how to make transparent sensors on glass substrates and how to achieve imaging of surface textures.

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Non-Markovian environment induced Schrödinger cat state transfer in an optical Newton’s cradle
Authors: Zhao Xinyu , Xia Yan
Published: December 2024

In this paper, we study the Schrödinger cat state transfer in a quantum optical version of Newton’s cradle in a non-Markovian environment. Based on a non-Markovian master equation, we show that the cat state can be transferred purely through the memory effect of the non-Markovian common environment, even without any direct couplings between neighbor cavities. The mechanism of the environment-induced cat state transfer is analyzed both analytically and numerically to demonstrate that the transfer is a unique phenomenon in a non-Markovian regime. From this example, the non-Markovian environment is shown to be qualitatively different from the Markovian environment, reflected by the finite versus zero residue coherence. Besides, we also show the influence of environmental parameters is crucial for the transfer. We hope the cat state transfer studied in this work may shed more light on the fundamental difference between non-Markovian and Markovian environments.
High precision and low noise demodulation scheme using adaptive fast fourier transform for fiber-optic interferometric sensors
Authors: Liu Zheng , Lou Ruizhe , Zhang Lingling , Feng Lei , Wang Fuyin , Yao Qiong , Wu Weijun , Xia Ji
Published: December 2024

This paper presents an adaptive fast Fourier transform (adaptive FFT) demodulation scheme, aimed at enhancing the precision and noise suppression capability of signal processing in fiber-optic interferometric sensors. By adaptively optimizing the length of the acquired spectrum and dynamically adjusting the frequency domain resolution, the proposed scheme can precisely calculate the eigenfrequency of the reflected spectrum. Therefore, the adaptive FFT demodulation scheme can effectively enhance the extraction ability of phase quadrature demodulation signal. In comparison to traditional FFT demodulation scheme, the proposed scheme demonstrates nearly a tenfold improvement in eigenfrequency calculation accuracy. The experimental results indicate a significant improvement in the stability of the adaptive FFT demodulation scheme. The fluctuations are reduced to approximately 0.03 dB. This value is roughly equivalent to 25% of the fluctuations typically observed in traditional FFT demodulation schemes. Additionally, the adaptive FFT scheme demonstrates superior adaptability to sensors with varying optical path differences (OPDs). It maintains noise levels below -100 dB@1 kHz across sensors with different OPDs, and substantially reduces noise fluctuations compared to traditional FFT scheme. Furthermore, the proposed scheme exhibits notable advantages in crosstalk suppression for multiplexed signal demodulation. The fundamental frequency crosstalk (FFC) is reduced to below -50 dB, which is approximately 10 dB lower than that achieved by traditional FFT methods. The adaptive FFT demodulation scheme shows promising potential for applications in low noise, high precision, and dynamic signal detection within fiber-optic interferometer sensors and multiplexing arrays.
Ultra-low AC Susceptibility Measurement with Quantum Diamond Microscope
Authors: Dasika Shishir , Saha Kasturi
Published: December 2024

Conventional AC susceptometers are limited to measuring AC susceptibilities oF the order of nJT−1. In this study, we showcase the application of a diamond quantum magnetometer and dynamical control sequences to assess susceptibilities in Permalloy micro-disks at magnitudes as low as a few fJT−1.
Testbed for Automatized Machine Learning Optimization of Nitrogen Vacancy Center Based Magnetometry
Authors: Pellicer-Guridi Ruben , Mongelos Asier , Francis Jason , Cifuentes Angel , Molina-Terriza Gabriel
Published: December 2024

We present a versatile, robust and inexpensive setup for Nitrogen Vacancy center based sensing that enables automatized generation of large datasets to train machine learning algorithms towards fieldable advanced quantum magnetic field sensors.
Perfectly-aligned diamond quantum sensors to visualize superconducting vortices
Authors: Nishimura Shunsuke , Kobayashi Taku , Ogawa Kensuke , Tsuji Takeyuki , Iwasaki Takayuki , Hatano Mutsuko , Sasaki Kento , Kobayashi Kensuke
Published: December 2024

We present a wide-field imaging technique using perfectly-aligned diamond quantum sensors to accurately visualize superconducting vortices in a thin film. Our results agree with theoretical models, validating our method’s precision and versatility in characterizing superconductors.
Depth-dependent radiative lifetimes in shallow nitrogen-vacancy centers in diamond
Authors: Zahedian Maryam , Vidrio Ricardo , Kolkowitz Shimon , Choy Jennifer T
Published: December 2024

Shallow nitrogen-vacancy (NV) centers in diamond are excellent quantum sensors for magnetic fields and temperature. Limited number of characterization methods exist to determine the depth of the NV center, which is useful for evaluating and optimizing its sensitivity. Here we experimentally demonstrate correlation between the radiative lifetime of NVs and their depth from the diamond interface, which paves the way for using lifetime measurements to estimate NV depth.
Widefield quantum sensing microscopy platform for cellular studies
Authors: Fernández-García Alfonso , Caravaca Eva , Hidalgo Fernando , de Dios Cristina , Acedo Pablo
Published: December 2024

Here, a widefield quantum sensing microscopy platform is described to be used for magnetic field measurements in cellular studies. Preliminary results have shown that the obtained spatial resolution and sensitivity are suitable for such applications
U-bent Fiber Optic Sensor Probe coated with Cobalt-Doped UiO-66 as Cadmium Ion Sensor
Authors: Dutta Sourav , Menon Swetha , Swaminathan Nandini , Madaboosi Narayanan , Sai V V R
Published: December 2024

Cadmium ions are human carcinogenic environmental toxins that demand vigilant monitoring to ensure water quality. Here, a Metal-Organic Framework coated fiber optic sensor is developed for the selective and sensitive detection of Cd(II) ions within its permissible limits.
Phase-sensitive OTDR system based on an improved 3×3 coupler demodulation scheme
Authors: Zhang Jianzhong , Wang Tingyu , Ma Zhe , Zhang Mingjiang
Published: December 2024

We propose an improved 3×3 coupler phase demodulation scheme, which includes a three-port cross-side detection module and demodulation algorithm, enhancing the spatial resolution and phase demodulation quality of the interferometer-based φ-OTDR system.
4D Optical Microresonator for Precise Detection of Persistent Organic Pollutants in Water
Authors: Saetchnikov Anton , Ostendorf Andreas
Published: December 2024

This paper introduces a high performance method for detection of persistent water contaminants utilizing whispering gallery mode technique. An array of self-sensing 4D microcavities, fabricated via two-photon polymerization, enables sensitive detection down to 1 ppb.
Towards Controlling Single-Molecule Enzymes on Optoplasmonic WGM Sensor
Authors: Masuda Koji , Houghton Matthew C. , Vollmer Frank
Published: December 2024

The optoplasmonic single-molecule sensor goes beyond sensing to potentially controlling single-molecule enzyme activities. We present methods for direct control of single-molecule enzyme activities on an optoplasmonic WGM sensor and their applications.
Integrated High-speed Sub-picometer Wavemeter Based on Silicon Carrier-depletion Modulator
Authors: Elaskar J. , Cammarata S. , Samà F. , Di Pasquale F. , Oton C. J.
Published: December 2024

We present a silicon integrated high-speed wavemeter with a range from 1520 to 1580 nm. Experimental results show a standard deviation of 0.16 pm with 150 kHz bandwidth and FBG detection up to 42 kHz.
Integrated Optical Parametric Oscillators for Mid-Infrared Spectroscopy
Authors: Hwang Alexander Y. , Stokowski Hubert S. , Park Taewon , Jankowski Marc , McKenna Timothy P. , Langrock Carsten , Mishra Jatadhari , Ansari Vahid , Fejer Martin M. , Safavi-Naeini Amir H.
Published: December 2024

We present progress on advancing nanophotonic optical parametric oscillators for low-power and broadband mid-infrared spectroscopy.
Intelligent Optical Microresonator-Based Biochip: Bridging the Gap Between Laboratory and Real-World Applications
Authors: Saetchnikov Anton , Ostendorf Andreas
Published: December 2024

This paper proposes an optical microresonator-based biochip designed for immunosensing in complex solutions. It leverages multiplexed microresonator imaging and computational methods to reduce the reliance on chip manufacturing consistency, pushing WGM-based biosensing towards real-world applicability.
Photonic Integrated Circuits with Protein Catalyzed Capture Agents for Biosensing in Complex Media
Authors: Morales Jennifer M. , Bickford Justin R. , Liu Sanchao , Winton Alexander , Coppock Matthew , Cho Pak , Pellegrino Paul M.
Published: December 2024

Overview of integrated photonics sensors and peptides for the recognition of streptavidin and interleukin-6 in 10% fetal bovine serum.
Aerogel-Lined Capillaries as Liquid Core Waveguides for Real-Time Raman Spectroscopy of the Synthesis of Platform Chemicals from Biomass-Derived Feedstocks
Authors: Spiske Felix , Braeuer Andreas S.
Published: December 2024

We present the application of newly developed aerogel-lined capillaries which serve as step-index liquid-core waveguides to enable a signal gain in non-invasive real-time Raman spectroscopy of the synthesis of platform chemicals from biomass-derived feedstocks.
Dynamic Brillouin Sensor in Optical Fibres Using Fast Fourier Analysis and Low-Bandwidth Acquisition
Authors: Chin Sanghoon , Soto Marcelo A.
Published: December 2024

A dynamic Brillouin sensor using spontaneous Brillouin scattering and low bandwidth electronics is developed. The Brillouin frequency is obtained by time-division fast Fourier analysis on Brillouin signals, reaching a temperature resolution of 62mK at 1kHz.
Leptus alberti n. sp. (Trombidiformes: Erythraeidae) parasitizing free-living colonies of Apis mellifera, Partamona peckolti, Paratrigona eutaeniata and Tetragonisca angustula in Totoró and Valle del Cauca, Colombia
Authors: Sanchez-Quilindo Brayan Alexander , Pizo-Barona Harby Leandro , Benavides Montaño Javier Antonio
Published: December 2024

This study examined the ectoparasites in free-living wild bee colonies in Totoró, Cauca Department, and Valle del Cauca, Colombia. Researchers collected 2116 bee specimens: 620 from Cauca (200 Apis mellifera, 320 Partamona peckolti, and 100 Paratrigona eutaeniata) and 1496 from Valle del Cauca (Dagua, Tocota, Buga, Cali, Pradera), including 1498 A. mellifera and 48 Tetragonisca angustula. Using microscopic and stereoscopic techniques and a special taxonomic key, the study identified the first recorded presence of Leptus (Leptus) alberti n. sp. (Acari: Erythraeidae) in colonies of free-living Africanized A. mellifera and stingless bees, including P. peckolti, P. eutaeniata, and T. angustula in Cauca and Valle del Cauca. This finding updates the reported species for South America. The presence of L. (L.) alberti n. sp. was identified in four sample points in the Totoró-Cauca area, with a 75% parasitic prevalence in free-living bee colonies at three of the four localities, specifically in hives located in the wild forest of Totoró. Two Meliponini species were also identified: one in P. peckolti and another in P. eutaeniata. In Cauca, the prevalence was 5% for A. mellifera and 0.3% for Meliponini. In Valle del Cauca, L. alberti n. sp. was observed in five out of 22 localities, resulting in a 23% prevalence in wild A. mellifera. Additionally, a 4.16% prevalence (2/48) of L. alberti n. sp. was found in T. angustula. Six A. mellifera specimens tested positive for L. (L.) alberti n. sp., as did one P. peckolti and one P. eutaeniata specimen. No other external mites were detected in the collected samples.
Comparison of the effects of exergaming and balance training on dynamic postural stability during jump-landing in recreational athletes with chronic ankle instability
Authors: Sepasgozar Sarkhosh Sadaf , Khanmohammadi Roya , Shiravi Zeinab
Published: December 2024

The primary inquiry of this study was to determine if exergaming is more effective than balance training in improving dynamic postural control during jump-landing movements among athletes with chronic ankle instability (CAI). Additionally, the study aimed to compare the effectiveness of these interventions on clinical and psychological outcomes. This study was a randomized, single-blinded, controlled trial in which participants were assigned to either an exergaming group or a balance training group. Outcome measures were assessed before, after, and one month following the intervention. Primary outcomes included the stability index (SI) and time to stabilization (TTS) in the anteroposterior (AP), mediolateral (ML), and vertical (V) directions, the dynamic postural stability index (DPSI), and the resultant vector time to stabilization (RVTTS). Secondary outcomes included performance, fear of movement, and perceived ankle instability, measured using the side-hop test, the Tampa Scale for Kinesiophobia (TSK), and the Cumberland Ankle Instability Tool (CAIT), respectively. Results indicated a significant decrease in ML SI in both groups one month after treatment compared to before and after treatment (P = 0.013 and P<0.001, respectively). Additionally, one-way ANCOVA revealed a significant difference between the groups post-treatment (F(1,31) = 6.011, P = 0.020, η2 = 0.162) and one month post-treatment (F(1,31) = 4.889, P = 0.035, η2 = 0.136), with ML SI being significantly lower in the exergaming group than the balance training group at both time points. In both group, the DPSI also decreased significantly one month post-treatment compared to before and after treatment (P = 0.040 and P = 0.018, respectively). Both groups showed improvements in performance, severity of perceived ankle instability, and fear of movement. Thus, the study concluded that both exergaming and balance training effectively improved postural control during jump-landing, with exergaming showing superior performance in the ML direction both after and one month post-treatment. In terms of clinical and psychological outcomes, both interventions were effective, with neither showing superiority over the other.
Energy-efficient and reliable dual closed-loop DC control system for intelligent electric vehicle charging infrastructure
Authors: Li Jun , Chen Wan , Zhu Xiaoqiong , Zang Baoguo , Zhang Cong , Hu Hengxiao , Zhang Ming , Lei Wenbao
Published: December 2024

This study presents an innovative dual closed-loop DC control system for intelligent electric vehicle (EV) charging infrastructure, designed to address the challenges of high power factor, low harmonic pollution, and high efficiency in EV charging applications. The research implements a three-level Pulse Width Modulation (PWM) rectifier with a diode-clamped topology and Insulated-Gate Bipolar Transistors (IGBTs), achieving a power factor of 0.99, a total harmonic distortion (THD) of 1.12%, and an efficiency of 95% through rigorous simulation. These results surpass those of wireless charging technology and bidirectional DC–DC converters, demonstrating the system’s superiority in key performance metrics. The dual closed-loop strategy, integrating a current inner loop and a voltage outer loop, ensures rapid response and high steady-state accuracy, with the PI regulator effectively managing phase coupling for balanced power flow. The voltage outer loop’s stability is critical for the system’s reliable operation. The study also discusses the challenges in the dynamic variation of midpoint source current and proposes future work to increase the system’s switching frequency, improve anti-interference capabilities, and enhance the accuracy of the sampling process. Advanced computational intelligence and optimization techniques are highlighted as essential for tackling the complex challenges of modern EV charging systems. The study contributes to the development of efficient, secure technology for the next generation of wireless networks and power systems, providing a robust empirical basis for the proposed control strategies through MATLAB/Simulink simulations. This research sets a solid foundation for the performance assessment of EV charging systems, offering high-performance, environmentally friendly, and economically viable solutions for sustainable transportation.
High-performance liquid chromatographic method for determination of voriconazole in pure and gel formulation
Authors: Sheikh Samina , Beg Anwar Ejaz , Baig Mirza Tasawer , Ibrahim Sadaf , Huma Ambreen , Jabeen Aisha , Anwar Zubair
Published: December 2024

For routine measurement of Voriconazole (VZ) in a pure and gel formulation, a quick and accurate RP-HPLC technique with UV detection (254 nm) was developed. With a flow rate of 1.0 ml/min using a mobile phase that contained acetonitrile and water mixed 50:50, v/v. Internal standard approach was used for quantification. The method shows good linearity (correlation coefficient = 0.9999) with acceptable accuracy, precision and robustness. Three elements were taken into account to measure robustness. Flow rate, mobile phase composition, and pH all have an impact on the response, but only the flow rate which causes a reduction in the concentration of the drug—has a significant impact on the response. Analyst, equipment, and days were taken into consideration for a precision measurement. The analytical procedure had good precision, as seen by the %RSD which is found to be less than 2.0. The proposed method was straightforward, extremely sensitive, exact, and accurate, and it had a retention time of less than 4 minutes, indicating that it is appropriate for daily quality control.
Hizketa-interfaze isilak: ahotsaren sorrera bioseinaleetatik. Seinale elektromiografikoen bidezko azterketa
Authors: Del Blanco Sierra Eder , Salomons Inge , De Zuazo Xabier , Sanchez de la Fuente Jon , Saratxaga Couceiro Ibon , Navas Cordón Eva , Hernaez Rioja Inma
Published: December 2024

Hizketa-interfaze isilak (SSI) mintzamena deskodetu dezaketen gailuak dira, bioseinale ez-akustikoetatik abiatuta. Gailu horiek aplikazio ugari dituzte, eta horietako bat hizketarako ezintasunak dituzten pertsonen komunikazio-laguntza da. Hainbat SSI mota daude, erabilitako bioseinale motaren arabera: ahots-traktuaren irudiak, elektromiografia (EMG), ultrasoinuak, elektroentzefalografia (EEG) eta magnetoentzefalografia (MEG). Lan honetan, EMG seinaleetan oinarritutako SSI bat diseinatzeko egindako esperimentuak deskribatzen dira. Artikuluan erabilitako metodologia deskribatzen da, EMG seinaleak, audioa eta bideoa barne hartzen dituen datu-base baten diseinua eta azken garapena barne. EMG hizketa bihurtzeko esperimentuetan lortutako emaitzak erakusten dira esatari bakar batentzat, eta ingelesezko erreferentziazko datu-base batekin lortutakoekin alderatzen dira. Lortutako emaitzek sendotasuna erakusten dute saioarekiko, saio desberdinetarako seinaleak lortzeko jarraitutako estrategiari esker. Gainera, emaitzak erreferentziako datu-basearekin lortutakoen baliokideak dira entrenamenduko datu-baseen tamainak parekoak direnean.
Cadernos de Geografia – O percurso de uma revista na publicação do seu número 50
Authors: Cunha Lúcio , Figueiredo Albano , Padeiro Miguel
Published: December 2024

A periodicidade semestral, o reforço do número de textos em língua inglesa, a indexação em plataformasinternacionais e a grande diversidade de contextos geográficos explorados nos artigos publicados são alguns dos aspetos que marcam a atualidade da revista Cadernos de Geografia aquando da publicação do número 50.Num contexto de grandes desafios, promovido pela valorização da publicação a nível internacional e procura centrada em revistas indexadas com elevado impact factor, faz-se um balanço da trajetória de publicação desta revista 40 anos volvidos desde o primeiro volume publicado. Os indicadores analisados para esta revista, e aqui apresentados, ilustram não só o seu percurso, como traduzem, de alguma forma, a evolução da Geografia Portuguesa.
Variabilidade climática e adaptação humana durante o último período glaciar: um projeto multidisciplinar na região do Vale do Côa (nordeste de Portugal)
Authors: Dimuccio Luca Antonio , Aubry Thierry , Rodrigues Nelson , Cunha Lúcio
Published: December 2024

O Projeto «CLIMATE@COA - COA/CAC/0031/2019» propõe uma abordagem integrada multidisciplinar baseada em análises estratigráficas, sedimentológicas, geoquímicas, geomorfológicas, arqueológicas, zoo-arqueológicas e geocronológicas de vários arquivos terrestres (formas e depósitos) a partir de um conjunto de sítios ao ar-livre distribuídos ao longo do vale fluvial do Rio Côa e nas áreas de planalto adjacentes (nordeste de Portugal). A maioria destas formas e depósitos contém informações relevantes sobre a evolução climática do Último Período Glaciar, bem como vestígios arqueológicos que nos permitem compreender os comportamentos humanos coevos. A investigação proposta tem como objetivo desenvolver um modelo evolutivo da região do Vale do Côa e deduzir os fatores ambientais condicionantes para essa evolução, nomeadamente o clima e as mudanças nos ecossistemas. Pretende-se caraterizar a ocupação humana do Plistocénico final e reconstituir a distribuição geográfica das fontes de matérias-primas e escolhas técnicas. A variabilidade tipo-tecnológica da produção lítica do Neandertal e do Homem Anatomicamente Moderno (HAM) será utilizada para avaliar os sistemas e as estratégias de exploração no tempo e assim compreender as sociedades e os comportamentos das populações humanas de caçadores-coletores paleolíticos. Os dados do projeto permitirão definir melhor a cronologia da transição entre os neandertais e o HAM e inferir sobre a sua territorialidade e organização social no contexto ambiental em que viviam. O conhecimento produzido pode trazer dados científicos originais e valiosos úteis para apoiar o planeamento territorial, a gestão ambiental e o turismo (e.g., através da exploração do património natural/cultural e da diversificação das ofertas turísticas), a fim de contribuir para a definição das estratégias a adotar para um desenvolvimento local e regional mais integrado e sustentável.
O papel dos espaços verdes e azuis na regulação climática urbana. Um estudo de caso na cidade de Coimbra (Portugal)
Authors: Silva Márcia Inês Losa , Cordeiro A. M. Rochette
Published: December 2024

O rápido processo de urbanização tem causado drásticas mudanças no uso do solo em espaços urbanos. Em consequência deste processo tem-se observado o aumento das temperaturas no interior das cidades – as ilhas de calor urbano. Assim, a procura de soluções no mitigar deste aumento das temperaturas passa pela implementação de espaços verdes e azuis, uma vez que estes têm uma grande importância na amenização das temperaturas e na qualidade de vida do cidadão. É neste sentido que se desenvolve o artigo, com o objetivo de compreender o contributo dos espaços verdes e azuis no planeamento urbano, tendo por base uma gestão territorial mais sustentável e resiliente às alterações climáticas. Através da utilização de data loggers realizou-se o levantamento de dados de temperaturas, com intuito de comparar três diferentes estações do ano (inverno, primavera e verão), e três momentos do dia (manhã, tarde e noite). Desta forma, foram selecionados quatro espaços verdes nas margens do plano de água do Mondego na cidade de Coimbra - Parque Verde do Mondego (margem esquerda e direita); Parque Dr. Manuel Braga; e Parque da Canção, bem como o próprio lençol de água. Os resultados revelam a influência da vegetação e do espaço azul na amenização do clima urbano, verificando-se diferentes temperaturas entre os espaços verdes (habitualmente com temperaturas mais frescas) e espaços com pouca vegetação – Parque da Canção -, assim como se constata o papel do arbóreo caducifólio na regulação térmica deste setor da cidade. No lençol aquático, verifica-se, em vários momentos do dia, a influência das infraestruturas envolventes (parede de betão), fazendo com que o setor a jusante registe assim temperaturas mais elevadas do que a montante. É ainda visível a influência que este possui na amenização das temperaturas nas suas margens.
Una propuesta de multimetodología osteoarqueológica para reconstruir la salud, dieta y crecimiento infantil Medieval
Authors: Mangas-Carrasco Elvira , López‑Costas Olalla
Published: December 2024

Presentamos el planteamiento multimetodológico de una investigación doctoral, previa al análisis y obtención de datos. Desde hace dos décadas los estudios dedicados a los individuos no adultos del pasado se han consolidado en Antropología Biológica y Arqueología. Ambas disciplinas estudian los restos esqueléticos ya que son una evidencia directa de su existencia. Además de su importancia en la sociedad, son sujetos muy susceptibles a los cambios ambientales e históricos/culturales. El objetivo del proyecto doctoral es ahondar en las condiciones de vida (salud, dieta y crecimiento) de los individuos no adultos de comunidades medievales de la Península Ibérica, estudiando los restos esqueléticos, con la finalidad última de, siempre que sea posible, aproximarnos a la identidad social infantil en estas comunidades. Como caso de estudio proponemos una muestra de 7 necrópolis de dos zonas de la Península Ibérica: Noroeste (Adro Vello, Santa María, San Bartolomé y A Capela do Pilar) y Centro (Cadalso de los Vidrios, Uceda y Arroyo Lagunillas) de España; que suman un total de 432 individuos de todas las edades, esqueletos no adultos y adultos, con un rango cronológico del siglo X al XV d.C. Se incluyen individuos adultos (“niños que sobrevivieron”) para ofrecer una visión más contextualizada y completa de la infancia en estas comunidades. Las fases de estudio que se pretende desarrollar son: 1) salud/estrés: estudio de lesiones poróticas; 2) alimentación: reconstrucción de la dieta mediante análisis multi-isotópicos; 3) crecimiento: estudios métricos y caracterización espectroscópica. Los datos obtenidos serán interpretados dentro del marco teórico de la Arqueología de la Infancia.
Presentamos una combinación metodológica para ahondar en las condiciones de vida, ambientales y sociales, de no-adultos del Noroeste (4 necrópolis, Galicia) y Centro (3 necrópolis, Madrid, Castilla la Mancha) de Iberia de cronología medieval. Se desarrollan tres fases: 1) salud/estrés: estudio de marcadores inespecíficos de estrés biológico; 2) alimentación: reconstrucción de la dieta mediante análisis multi-isotópicos; 3) crecimiento: basado en métrica y caracterización espectroscópica. Este trabajo pretende presentar un modelo para conocer las identidades de los no-adultos, en base el comportamiento nutricional y las prácticas culturales específicas de la zona y periodo reconstruidas a través de las características físicas/biológicas preservadas en sus esqueletos.
A Criança como Barómetro Social e Biológico da Alta Idade Media
Authors: Casimiro Silvia
Published: December 2024

De acordo com a UNICEF, nos países onde se regista maior instabilidade político-administrativa, observa-se uma expressiva indiferença ou invisibilidade relativamente às crianças, inscrevendo-se os índices mais baixos da sua saúde e desenvolvimento biológico. Considerando a criança como um barómetro sensível, suscetível aos efeitos do ambiente em que se desenvolve, este projecto explora as especificidades dos fluxos de instabilidade e respectivo impacto em termos sociais e biológicos na Infância, sendo esta entendida como um processo fluido, dinamizado por aspectos biológicos e socioculturais, variáveis no tempo e no espaço. Para o efeito, selecionou-se a Península de Lisboa no período compreendido entre os séculos III e XIII, durante o qual ocorrem eventos históricos marcantes com implicações significativas no modo de vida das populações. Recorrendo a metodologias, sobretudo, do âmbito da arqueologia e da bioantropologia, pretende-se contribuir para o conhecimento das comunidades alto-medievais e, a par, para a identificação de práticas e políticas de intervenção a aplicar em comunidades contemporâneas.
A possible case of Crouzon syndrome in a female figurine from Bracara Augusta from the 2nd century CE
Authors: Barroso Maria do Sameiro
Published: December 2024

Artworks are not just objects of beauty but also historical documents that can reveal diseases unknown to ancient physicians, such as congenital disorders. A bronze female figurine from the 2nd century AD, unearthed during excavations in the Roman city of Bracara Augusta, currently the city of Braga, presents intriguing facial features, strongly indicating an underlying medical condition. The abnormal facial traits point to craniofacial dysostosis and, more precisely, Crouzon Syndrome. The portrayed figure wears the walled crown of the city’s patron goddesses, Tyche/Fortuna, the earlier Greek goddess of Fate (or Chance), the patron goddess of Greek and Roman cities. The attribute of the tutelary goddesses is the cornucopia of abundance, symbolizing fertility, wealth and well-being. However, instead of this attribute, the young lady carries a serpent entwined on a rod under her right arm, an attribute related to the cult of health deities like Asclepius (the Roman Aesculapius) and the Latin goddess Fortuna. This essay will discuss the features of this figurine, relating her possible medical condition with the symbology of the walled crown and entwined serpent and her social-cultural and religious status.
Valor(es) em Contextos Globalizados
Authors: Olival Luís Filipe
Published: December 2024

Além de constituir uma recensão crítica das obras Towards an Anthropological Theory of Value: The False Coin of Our Own Dreams, de David Graeber, e Anthropologies of Value: Cultures of Accumulation Across the Global North and South, editado por Luis Fernando Angosto-Ferrández e Geir Henning Presterudstuen, este texto procura introduzir bases teóricas sólidas para lidar com a pluralidade de formas de valorizar a atividade humana e os produtos que dela derivam. Desta forma, pretende contribuir para estimular o diálogo antropológico sobre os mecanismos sociais que guiam a atividade humana e que, portanto, estão na base de todas as relações de poder que estruturam a nossa sociedade.
Distant cousins and weak interdisciplinarity: funerary landscapes, identities, material culture, and social practices
Authors: Quirós Castillo Juan Antonio
Published: December 2024

The aim of this work is twofold. Firstly, it seeks to reflect on the recent evolution of projects dedicated to the materiality of death in the Early Middle Ages in the Iberian Peninsula from the dual perspective of funerary archaeology and bioarchaeology’s, arguing that both lines of work maintain a form of partial interaction, which could be defined in terms of weak interdisciplinarity. This, in turn, limits the scope of research on the funerary record. As a result, the second part of this presentation advocates for a form of deep interdisciplinarity and the creation of new theoretical and methodological frameworks. To this end, several proposals and suggestions are made aimed at building a shared work agenda based on the analysis of four key topics.
À sombra do castelo repousam os de Mós: as práticas funerárias e os mortos da necrópole Medieval de Mós (Torre de Moncorvo, Bragança, Portugal)
Authors: Tereso Sofia , Perpétuo João , Silva Ana Maria
Published: December 2024

Mós terá sido fundada entre o final do século IX e o início do X. Integrada no processo de reconquista cristã, fazia parte do conjunto de castelos e de sítios amuralhados beneficiados por uma posição estratégica na linha defensiva do rio Douro.
Na sequência dos trabalhos de construção de um muro em pedra, para sustentação do adro da igreja paroquial de Mós, foram identificadas em corte 39 sepulturas escavadas no substrato rochoso xistoso, que poderão recuar ao período de fundação do sítio. Do conjunto registado, apenas vinte e três foram escavadas, exumando-se do seu interior quinze indivíduos em posição primária, cinco ossários e um pequeno conjunto de ossos dispersos.
Pretende-se com este artigo a apresentação dos dados da antropologia funerária e dos resultados da análise paleobiológica da amostra exumada. Esta amostra populacional faz parte de um projeto de investigação interdisciplinar mais alargado, que permitirá obter um conhecimento mais aprofundado das comunidades alto-medievais do nordeste Transmontano.