HardwareX最新文献_第5页

Open-source CNC workstation for paper-based diagnostic assay assembly 开源CNC工作站，用于纸质诊断分析组件

IF 2.1

HardwareX Pub Date : 2026-03-01 Epub Date: 2025-12-30 DOI: 10.1016/j.ohx.2025.e00739

Lucy Tecle , Shannon Riegle , Andrew Piepho , Jacqueline Linnes

{"title":"Open-source CNC workstation for paper-based diagnostic assay assembly","authors":"Lucy Tecle , Shannon Riegle , Andrew Piepho , Jacqueline Linnes","doi":"10.1016/j.ohx.2025.e00739","DOIUrl":"10.1016/j.ohx.2025.e00739","url":null,"abstract":"<div><div>Paper-based diagnostics are promising for point-of-care testing, but their assembly is often manual and can introduce alignment variability. To address this, we developed a low-cost, open-source workstation that repurposes a three-axis computer numerical control (CNC) machine for automated pick-and-place assembly of paper-based assays. The system integrates an Arduino-based controller with GRBL firmware, a custom vacuum end effector, and component holders to handle delicate assay components. This design eliminates reliance on proprietary CNC controls, reducing the costs to under $900 while enabling machine-agnostic adaptability. Performance was validated across dipstick, lateral flow immunoassay, and custom duplex immunoassay formats. Linear placement accuracy averaged ∼0.5–0.6 mm (within functional tolerance for diagnostic readability), while angular deviations (1–3°) remained acceptable for sample flow. Control line intensity in CNC-assembled assays were statistically indistinguishable from hand-assembled assays, confirming preserved diagnostic performance. By lowering the barrier to automated fabrication, this workstation provides an accessible platform for academic labs, startups, and decentralized environments to prototype and scale paper-based diagnostics. The open-source hardware and design files expand opportunities for reproducible, affordable diagnostic assembly in early-stage research and development.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"25 ","pages":"Article e00739"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A method for designing birdcage coils based on a simplified magnetic field model, validated experimentally at 4 T, 7 T, and 15.2 T 基于简化磁场模型的鸟笼线圈设计方法，在4 T、7 T和15.2 T下进行了实验验证

IF 2.1

HardwareX Pub Date : 2026-03-01 Epub Date: 2025-12-13 DOI: 10.1016/j.ohx.2025.e00729

A. Villarreal , J. Lazovic , S.E. Solis-Najera , R. Martin , R. Ruiz , L. Medina , A.O. Rodriguez

{"title":"A method for designing birdcage coils based on a simplified magnetic field model, validated experimentally at 4 T, 7 T, and 15.2 T","authors":"A. Villarreal , J. Lazovic , S.E. Solis-Najera , R. Martin , R. Ruiz , L. Medina , A.O. Rodriguez","doi":"10.1016/j.ohx.2025.e00729","DOIUrl":"10.1016/j.ohx.2025.e00729","url":null,"abstract":"<div><div>Magnetic resonance imaging and spectroscopy rely on magnetic fields generated by radiofrequency (RF) volume coils for high-quality data acquisition. Understanding electromagnetic field behavior in these coils is key to optimizing imaging and designing advanced coils. This paper presents an alternative tool to validate experimental and simulated results from traditional bridge coils using a theoretical approach to derive the magnetic field B1 expression for a BC coil. The formula will be used for: (a) assessing RF coil performance for high-quality images with optimal SNR and accurate anatomical representation, and (b) guiding the development of BC coils for specific applications. To validate the model, phantom images were acquired at different resonant frequencies, and the results were compared with experimental data. The findings confirm the accuracy and effectiveness of the model, offering insights into electromagnetic field behavior and providing a framework for advancing RF coil design in MR imaging and MR spectroscopy.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"25 ","pages":"Article e00729"},"PeriodicalIF":2.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146037792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lensless light guide-coupled LED illumination for low-cost microscopy 用于低成本显微镜的无透镜光导耦合LED照明

IF 2.1

HardwareX Pub Date : 2025-12-01 Epub Date: 2025-11-24 DOI: 10.1016/j.ohx.2025.e00725

Fox Avery , Thomas Geer , Dirk Albrecht

引用次数: 0

A cost-effective and open-source near-field electrospinning system with a graphical user interface 具有图形用户界面的成本效益和开源近场静电纺丝系统

IF 2.1

HardwareX Pub Date : 2025-12-01 Epub Date: 2025-09-11 DOI: 10.1016/j.ohx.2025.e00691

Cristian Castillo-Velásquez , Carlos Fuhrhop , Mario E. Flores , Sebastian Brauchi

引用次数: 0

Design of a low-cost microphone array for portable multi-platform applications 便携式多平台应用的低成本麦克风阵列设计

IF 2.1

HardwareX Pub Date : 2025-12-01 Epub Date: 2025-10-01 DOI: 10.1016/j.ohx.2025.e00710

Luis Corral, Pablo E. Román

引用次数: 0

Anaerobic Pyrolysis Chamber: An atmosphere-controlled furnace for controlled-atmosphere thermal decomposition 厌氧热解室：用于可控气氛热分解的常压炉

IF 2.1

HardwareX Pub Date : 2025-12-01 Epub Date: 2025-10-15 DOI: 10.1016/j.ohx.2025.e00716

Ryan T. Chaffer, Joseph Johnson, Matthew J. DiDomizio, Mark B. McKinnon

{"title":"Anaerobic Pyrolysis Chamber: An atmosphere-controlled furnace for controlled-atmosphere thermal decomposition","authors":"Ryan T. Chaffer, Joseph Johnson, Matthew J. DiDomizio, Mark B. McKinnon","doi":"10.1016/j.ohx.2025.e00716","DOIUrl":"10.1016/j.ohx.2025.e00716","url":null,"abstract":"<div><div>As some materials are heated they undergo thermal decomposition, resulting in a change in the material’s physical structure and chemical composition through a process called pyrolysis. During pyrolysis, flammable vapors are driven off the material; if those vapors are released in the presence of oxygen, flaming combustion may occur. Combustion can accelerate the decomposition process, making it difficult to isolate and harvest partially decomposed material samples for subsequent analysis. Due to this difficulty, the thermo-physical changes to materials undergoing pyrolysis have not been extensively studied. A new apparatus, termed the Anaerobic Pyrolysis Chamber (APC), was designed to produce gram-scale samples of partially decomposed materials by pyrolyzing those materials under a defined heating protocol and in an inert atmosphere. The APC consists of a decomposition chamber positioned within a muffle furnace, and an instrumentation package designed to monitor and control the temperature, pressure, and oxygen concentration within the decomposition chamber. The driving purpose of the APC was to produce solid products of pyrolysis for study in other measurement apparatus. The performance of the apparatus has been characterized, and the APC has been used to support property measurement in research studies.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00716"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145362740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FireLog: An open-source, low-cost system for temperature logging during wildland fires with high spatial and temporal resolution FireLog：一个开源、低成本的系统，用于野外火灾期间的温度记录，具有高空间和时间分辨率

IF 2.1

HardwareX Pub Date : 2025-12-01 Epub Date: 2025-11-13 DOI: 10.1016/j.ohx.2025.e00722

Nipuna Chamara , Yufeng Ge , Sabrina Russo

{"title":"FireLog: An open-source, low-cost system for temperature logging during wildland fires with high spatial and temporal resolution","authors":"Nipuna Chamara , Yufeng Ge , Sabrina Russo","doi":"10.1016/j.ohx.2025.e00722","DOIUrl":"10.1016/j.ohx.2025.e00722","url":null,"abstract":"<div><div>Measuring flame, air, and soil temperatures during wildland fires, including wildfires and controlled burns in land management contexts, is crucial for research and applications in fire ecology, safety, and management in a wide array of ecosystems, from grasslands to forests. However, open-source and commercial systems are needed for measuring and logging flame and air temperatures that are user-friendly, economical, modular, and customizable. This paper details the design, development, and validation of the FireLog system. Laboratory validation experiments demonstrated high measurement accuracy, with a minimum coefficient of determination (R2) of 0.98 and the highest observed root mean square error (RMSE) of 29.5 °C when compared with a Campbell Scientific data logger in furnace tests spanning 20–1000 °C. These results confirm the FireLog system’s precision, repeatability, and robustness under controlled conditions. Field deployment during prescribed burns further validated its operational performance, confirming its ability to record temperature dynamics reliably in active fire environments. FireLog represents a practical and scalable tool for researchers and practitioners in fire science and land management.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00722"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145568248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cost-effective and versatile Hardware-in-the-Loop system for DC/DC converter emulation in education and research 用于教育和研究的DC/DC变换器仿真的高性价比和多功能硬件在环系统

IF 2.1

HardwareX Pub Date : 2025-12-01 Epub Date: 2025-09-19 DOI: 10.1016/j.ohx.2025.e00701

Alejandro Gaviria-Cano, Cristian Escudero-Quintero, Jose David López-Suárez, Juan Pablo Villegas-Ceballos, Elkin Edilberto Henao-Bravo, Sergio Ignacio Serna-Garcés

引用次数: 0

Open-source low-cost non-contact ECG monitoring system using active dry electrodes 采用有源干电极的开源低成本非接触式心电监测系统

IF 2.1

HardwareX Pub Date : 2025-12-01 Epub Date: 2025-10-27 DOI: 10.1016/j.ohx.2025.e00718

Siluo Chen , Yu Chen , Jing Huang , Chengyu Liu , Kan Luo

{"title":"Open-source low-cost non-contact ECG monitoring system using active dry electrodes","authors":"Siluo Chen , Yu Chen , Jing Huang , Chengyu Liu , Kan Luo","doi":"10.1016/j.ohx.2025.e00718","DOIUrl":"10.1016/j.ohx.2025.e00718","url":null,"abstract":"<div><div>Continuous electrocardiogram (ECG) monitoring is essential for the early detection of cardiac arrhythmias and other heart conditions. However, conventional wet electrode-based systems often cause skin irritation and signal degradation, making them uncomfortable and unsuitable for long-term daily use. In this study, we present a fully open-source, low-cost (∼$14), miniaturized (∼50 × 35 × 28 mm<sup>3</sup>), and lightweight (∼60 g), wearable ECG monitoring platform that uses non-contact, active, dry electrodes based on capacitive coupling. The system integrates ultra-high input impedance electrode circuitry, an analog front-end integrated circuit, Bluetooth wireless communication, and an Android mobile application for real-time signal visualization and storage. Comprehensive validation shows that the system reliably acquires ECG signals through light to moderate clothing, with clear preservation of key features, such as QRS complexes, and accurate heart rate estimation. Comparative experiments with a commercial, clinical-grade ECG monitor demonstrate excellent agreement in rhythm tracking, and systematic module-level power analysis highlights further opportunities for low-power optimization. All hardware designs, firmware, and software are openly released to accelerate innovation and reproducibility in the field of wearable, non-contact ECG monitoring. The proposed platform provides a practical, extensible, and accessible reference for researchers aiming to advance next-generation cardiac monitoring technologies.</div></div>","PeriodicalId":37503,"journal":{"name":"HardwareX","volume":"24 ","pages":"Article e00718"},"PeriodicalIF":2.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145416973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FreiLaser: Flexible pulse generator for laser control in optogenetic experiments FreiLaser：用于光遗传实验中激光控制的柔性脉冲发生器

IF 2.1

HardwareX Pub Date : 2025-12-01 Epub Date: 2025-10-04 DOI: 10.1016/j.ohx.2025.e00709

Artur Schneider , Ilka Diester

引用次数: 0