Motivated by the unexplored potential of in vitro neural systems for computing and by the corresponding need of versatile, scalable interfaces for multimodal interaction, an accurate, modular, fully ...customizable, and portable recording/stimulation solution that can be easily fabricated, robustly operated, and broadly disseminated is presented. This approach entails a reconfigurable platform that works across multiple industry standards and that enables a complete signal chain, from neural substrates sampled through micro‐electrode arrays (MEAs) to data acquisition, downstream analysis, and cloud storage. Built‐in modularity supports the seamless integration of electrical/optical stimulation and fluidic interfaces. Custom MEA fabrication leverages maskless photolithography, favoring the rapid prototyping of a variety of configurations, spatial topologies, and constitutive materials. Through a dedicated analysis and management software suite, the utility and robustness of this system are demonstrated across neural cultures and applications, including embryonic stem cell‐derived and primary neurons, organotypic brain slices, 3D engineered tissue mimics, concurrent calcium imaging, and long‐term recording. Overall, this technology, termed “mind in vitro” to underscore the computing inspiration, provides an end‐to‐end solution that can be widely deployed due to its affordable (>10× cost reduction) and open‐source nature, catering to the expanding needs of both conventional and unconventional electrophysiology.
This article presents an accurate, modular, customizable, and portable in vitro neuron electrophysiology solution that can be easily fabricated, robustly operated, and broadly disseminated. The solution integrates reconfigurable recording platforms, open‐source electronics, and in‐house micro‐electrode arrays. The system's utility is showcased through a comprehensive set of demonstrations involving various culture types and stimulation modalities, concurrent imaging, and long‐term recording.
5G networks are designed to support a variety of services with highly demanding Quality-of-Service (QoS) requirements. This opened the door for novel extended reality (XR) media applications to ...emerge with 5G. However, recent 5G field tests and system-level simulation studies show that further XR enhancements are required to support a massive adoption of XR services in 5G networks. Such enhancements are expected to come into play with 5G-Advanced. In this line, we propose and study an XR loopback mechanism that adapts the XR traffic to the instantaneous 5G network conditions by exploiting an XR application feedback. We propose various XR loopback algorithms, strategies, and parameters' configurations and study their impact on the 5G end-to-end performance. We conduct extensive simulation campaigns by building realistic end-to-end 5G network scenarios with 3GPP mixed XR traffic setups. Results show that the proposed XR loopback mechanism can boost XR performance in 5G networks by adapting to 5G network conditions, while keeping the XR QoS requirements under control. We provide various insights and practical directions on XR loopback design that allow us to take full advantage of the 5G network capabilities and progress toward 5G-Advanced network design.
•Low cost data acquisition system for recording three-component seismic noise.•Suitability of the equipment for the application of the H/V method.•The developed system has been successfully compared ...with commercial systems.•It is an open source and open hardware system.•The low cost is essential for small research groups with reduced economic support.
Earthquake effects are strongly related with the properties of the local geology, amplifying the ground motion, especially in soft soils. This amplification is connected with the resonant frequency, which can be estimated applying the horizontal-to-vertical spectral ratio (H/V) method on seismic noise measurements. In this work, a low-cost user-friendly data acquisition system (Geophonino-3D) has been designed for three-component seismic noise recording. The developed system consists of the signal conditioning circuit and the Arduino Due with an SD Shield for data storage. The suitability of the equipment for the application of the H/V method has been first assessed in the laboratory, according to the experimental sensitivity, the internal noise stability and the channel consistency. Subsequently, experimental verification has been carried out by recording seismic noise at eight different sites along the province of Alicante (southeast Spain), with different soil characteristics. The performance of the developed acquisition system has been evaluated in terms of the power spectral density and the H/V peaks by comparison with the results obtained through a commercial seismic recorder. The obtained results show the applicability of the developed acquisition system to record seismic noise and to apply the H/V method. Geophonino-3D is an open source and open hardware system and the price of its components is much lower than any other commercial equipment, which becomes a significant advance especially for small research groups with reduced economic support.
Due to the industry knowledge barrier, general computer aided design (CAD) software cannot do everything in digital manufacturing by itself, and industry CAD, therefore, occupies a crucial position ...in the CAD industry. To develop industry CAD smoothly, open-source is the best choice. We analyzed recent examples of industry CAD development and divided the development methods into four types: development based on the graphics development environment, development based on geometric modelling kernel, secondary development based on general CAD, and hybrid development. We analyzed the characteristics of various methods and believe that the method based on the hybrid development of the geometric modelling kernel and the graphics development environment is the best open-source industry CAD development method. We proposed a system architecture of open-source industry CAD for reference and conducted a preliminary exploration of the reference architecture to verify its feasibility.
This article is an attempt to answer the question whether and under what conditions it is beneficial to develop an own intelligent building system, when many free open source systems are available. ...The publication presents the characteristics of author's own home automation system - sHome, as well as the open-source system - Domoticz, in a configuration that is as close to the functionality of the author's system as possible. The work ends with a comparative analysis of the systems and conclusions from the analysis.
Purpose
A surge of library activities and technological advances have increased the demand for data accuracy and agility among library clientele. Therefore, novel approaches are needed to extend ...library services. This paper aims to introduce the implementation of a prototype mobile library application (app) designed using an in-house open source system, Koha.
Design/methodology/approach
This paper presents a case study using a metamorphosis process to create mobile apps. This case study is tested based on the library services with a set of activities during the system acceptance test (SAT) and also user acceptance test (UAT). An application programming interface (API) used to support two-way communication, including system-to-component and system-to-system connectivity. The design, features and advantages of this mobile app are discussed, illustrated and analyzed. The case study reports the mobile app version development from the Koha Open Source Library Information System.
Findings
The app was tested using user acceptance test (UAT) and system acceptance test (SAT) by library staffs who found it functional, accessible, appealing and useful. Features such as Online Public Access Catalog search, library collection scanning, patron accounts, patron personal book collection, circulation, librarian chat, QR codes for borrowing books, social media integration and notifications of library activities and events were successfully tested. This process was useful for the creation of a mobile app based on the existing library System-Koha Open Source System.
Research limitations/implications
This study is limited to a case study of a national university in Malaysia.
Practical implications
This study has some practical implications for implementing library mobile applications, e.g. it will encourage librarians to implement library applications in libraries.
Originality/value
This study is useful for mobile developers and libraries that plan to offer mobile library services to their patrons. This paper presents a case study of metamorphosis existing process of library open source System-Koha Open Source System.
In animal behavioral biology, an automated observing/training system may be useful for several reasons: (a) continuous observation of animals for documentation of specific, irregular events, (b) ...long-term intensive training of animals in preparation for behavioral experiments, (c) elimination of potential cues and biases induced by humans during training and testing. Here, we describe an open-source-based system named CATOS (Computer Aided Training/Observing System) developed for such situations. There are several notable features in this system. CATOS is flexible and low cost because it is based on free open-source software libraries, common hardware parts, and open-system electronics based on Arduino. Automated video condensation is applied, leading to significantly reduced video data storage compared to the total active hours of the system. A data-viewing utility program helps a user browse recorded data quickly and more efficiently. With these features, CATOS has the potential to be applied to many different animal species in various environments such as laboratories, zoos, or even private homes. Also, an animal’s free access to the device without constraint, and a gamified learning process, enhance the animal’s welfare and enriches their environment. As a proof of concept, the system was built and tested with two different species. Initially, the system was tested for approximately 10 months with a domesticated cat. The cat was successfully and fully automatically trained to discriminate three different spoken words. Then, in order to test the system’s adaptability to other species and hardware components, we used it to train a laboratory rat for 3 weeks.
This paper reports on a study that explores the requirements and level of acceptance for the Koha open source software implementation in Malaysian academic libraries. This is a qualitative study ...based on interviews with system librarians from library application and system divisions in 5 Malaysian universities. The interviews were conducted to understand the technology acceptance, system quality and system information, beliefs and attitude of librarians and to provide insight into a user and open system relations. These factors can be critical in order to understand what may hinder the acceptance of open source systems in Malaysia academic libraries. The findings disclose that the level of acceptance of the Koha open source system among Malaysian librarians is high as they are satisfied with the information quality, system quality and system platform. They have positive intentions to use this system and believe it meets their current and future information needs. The requirements of its implementation are focused on perceived usefulness (technology), attitude toward using (users), and perceived ease of use (system). The subsequent influencing factors are a reflection of Koha system stability and users' acceptance of this system's information quality, system quality, librarians' awareness, satisfaction, user confidence level, support for library standards, highly integrated modules, a web-based solution, intention to use a system, and actual usage of an open-source system. Practical implications include cost savings, outsourced system maintenance, and accessibility of the system after office hours. The Koha open-source system is a new paradigm in system solutions for libraries in Malaysia. The results of the current study are applicable to other library settings.
The analysis of seismic noise provides a reliable estimation of the soil properties, which supposes the starting point for the assessment of the seismic hazard. The horizontal-to-vertical spectral ...ratio technique calculates the resonant frequency of the soil just by using a single three-component sensor. Array measurements require at least several vertical sensors registering simultaneously and their analysis provides an estimation of the surface waves dispersion curve. Although these methods are relatively cheaper than other geotechnical techniques, the cost of the sensors and the multi-channel data acquisition system means that small research groups cannot afford this kind of equipment. In this work, two prototypes for registering seismic noise have been developed and implemented: a three-channel acquisition system, optimized for working with three-component sensors; and a twelve-channel acquisition system, prepared for working simultaneously with twelve vertical geophones. Both prototypes are characterized by being open-hardware, open-software, easy to implement, and low-cost. The main aim is to provide a data acquisition system that can be reproduced and applied by any research group. Both developed prototypes have been tested and compared with other commercial equipment, showing their suitability to register seismic noise and to estimate the soil characteristics.
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