Digital Video Recording Research Articles

Exploring Characteristics and Contributory Factors of Road Crashes and Near Misses Recorded via Dashboard Camera


 
 
 The use of dashboard camera (dashcam), or also known as digital video recorder (DVR) is increasingly becoming popular among personal vehicle owners nowadays due to affordable prices and higher video qualities. Many road-related incidents including vehicle crashes and near-misses can be recorded using dashboard cameras and shared via social media as lessons learned to others. Recorded videos of the incidents in real-time can be observed and used for a variety of purposes, including as supportive evidence for investigation. This paper explores the potential use of recorded dashcam videos in determining the characteristics and factors contributing to road crashes and near-misses under different situations. Selected video records of road crashes and near-misses were obtained from the internet thru social media and were used for analysis. The findings concluded that a dashboard camera is an effective digital video technology for traffic and accident monitoring systems. It has a high potential in providing supportive evidence of many frequently occurring factors and understanding the causes of road crashes and near-miss incidents.
 
 

Forensic Analysis of Time Markers of Digital Recordings

The article presents the results of summarizing expert practice on the examination of the features of digital video and sound recordings, which make it possible to determine the time of file creation and date of the recorded events. The author introduces the concept of “time marker” and proposes the classification of time markers in the file name, time attributes, and metadata by form and source of origin. The basic principles of time representation by various file systems are stated. The relationships between different time markers for original records and records made in other ways are analyzed. The article provides examples of using time markers to diagnose the method of making a record.Various types of time markers that are part of the recorded signal are considered. It is shown which of the recorded events can act as time markers. The author also analyses the possibility of dating using astronomical events. Differences between absolute and relative dating are considered concerning the study of audio and video files. Conclusions are drawn about the significance of the study of time markers for diagnosing the method of making a signalogram, performing relative or absolute dating of recorded events, or technological processes of making a signalogram.

A study on behaviour of Deccani lambs reared on different flooring material

A study was conducted to evaluate the behaviour of Deccani lambs on different flooring material. Behaviour is the important indicator of animal welfare. Eighteen growing Deccani lambs of either sex with uniform body weight of 12.61±0.04 kg and aged between 3 to 6 months were selected from the Sheep and Goat unit of Livestock Farm complex. These lambs were randomly allotted to three flooring types viz., Mud floor (control, T1), Concrete floor (T2) and mud floor with rubber mats (black, rubber material, 8 mm thick (T3). The behaviour of lambs was recorded with help of Video cameras and digital video recorder (model: DS – 7B04HQHI-K1). The data on standing time (min) and percentage of standing was significantly (P

Construct social-behavioral association network to study management impact on waterbirds community ecology using digital video recording cameras.

Studying social‐behavior and species associations in ecological communities is challenging because it is difficult to observe the interactions in the field. Animal behavior is especially difficult to observe when selection of habitat and activities are linked to energy costs of long‐distance movement. Migrating communities tend to be resource specific and prefer environments that offer more suitability for coexisting in a shared space and time. Given the recent advances in digital technologies, digital video recording systems are gaining popularity in wildlife research and management. We used digital video recording cameras to study social interactions and species–habitat linkages for wintering waterbirds communities in shared habitats. Examining over 8,640 hr of video footages, we built tetrapartite social‐behavioral association network of wintering waterbirds over habitat (n = 5) selection events in sites with distinct management regimes. We analyzed these networks to identify hub species and species role in activity persistence, and to explore the effects of hydrological regime on these network characteristics. Although the differences in network attributes were not significant at treatment level (p = .297) in terms of network composition and keystone species composition, our results indicated that network attributes were significantly different (p = .000, r 2 = .278) at habitat level. There were evidences suggesting that the habitat quality was better at the managed sites, where the formed networks had more species, more network nodes and edges, higher edge density, and stronger intra‐ and inter‐species interactions. In addition, we also calculated the species interaction preference scores (SIPS) and behavioral interaction preference scores (BIPS) of each network. The results showed that species synchronize activities in shared space for temporal niche partitioning in order to avoid or minimize any potential competition for shared space. Our social network analysis (SNA) approach is likely to provide a practical use for ecosystem management and biodiversity conservation.

RETRACTED ARTICLE: Investigation of automotive digital mirrors ergonomics through laser shadowgraphy and driver’s real-road test questionnaire

This paper studied the effect of replacing automotive reflection mirrors with digital mirrors (DM) on the driver’s safety and comfort. In this perspective, a new classification for DMs was proposed in appendance with a brief overview of driver’s visual ergonomics, associated with comparison and criticism of automotive DM design causality. Automotive laser shadowgraphy from car interior was performed to measure the obscuration in the driver’s direct field of view, due to the presence of DM displays at nine different obscuration positions. The driver’s off-road glances time toward DM displays was measured using a digital video recorder system. The eye glances of thirty drivers of different ages during different traffic conditions and their opinion about each display position through a simple questionnaire were statistically analyzed. Some pilot solutions were also proposed to reduce the expected drawbacks of such technology.

HDFTL: An On-Demand Flash Translation Layer Algorithm for Hybrid Solid State Drives

NAND flash-based solid-state drives (SSDs) have been widely used in consumer electronic products such as smartphones, digital video recorders, and laptops. The flash translation layer (FTL) is crucial to the performance of SSDs. In this article, an on-demand FTL, briefly as HDFTL, is proposed for hybrid SSDs built with SLC+MLC flash memory. HDFTL divides the SLC into data blocks and translation blocks and uses all MLC as data blocks. All mapping items are stored in the translation block of the SLC, and partial mapping items are loaded into the cached mapping table of the FTL as needed. The contributions of HDFTL are as follows: (1) Unify the address mapping method of SLC and MLC areas to simplify the FTL design of hybrid SSDs; (2) Split the cached mapping table into a hot-write mapping table and a normal mapping table and use time locality to solve hot-write identification problem in hybrid SSDs; (3) According to the relative wear rate of SLC and MLC areas, adaptively adjust the size of the hot-write mapping table and the normal mapping table. Experimental results show that the performance of HDFTL is better than that of the existing FTLs for hybrid SSDs.

ЗАСТОСУВАННЯ СОЦІАЛЬНИХ ІНТЕРНЕТ-МЕРЕЖ ТА ІНТЕРНЕТ-БЛОГІВ У ПРОФЕСІЙНІЙ ПІДГОТОВЦІ МАЙБУТНІХ ТУРИСТІВ

The aim of the study is a practical analysis of social network services as a place to store multimedia resources that allow you to store and share digital photos, audio and video recordings, text files, presentations, and organize resource discussions for free. They can be used as educational materials (educational videos, photos on various topics, audio and video recordings of scientists' speeches, eyewitnesses of events, etc.), as well as means to store student video, photo, audio files and creative works. Method. Theoretical materials of the research are the best practices of foreign and domestic scientists in the field of network communications and their impact on the future specialists preparing in geography and tourism, namely articles, monographs, abstracts, dissertations. The study uses the method of theoretical materials analysis, as well as methods of observation, abstraction in identifying the qualification characteristics of social Internet networks. Content analysis (analysis of the social networks community messages content); statistical and comparative information analysis was carried out. Empirical research on the social Internet networks lies in creating and filling a community on the social Internet network, as well as engaging students in that community. Results. In the research it was found out that social networks can be used to solve the following tasks: to organize the collective work of students in the classroom (and outside it), which will be favourable to the communication, to gain the team experience; to ensure the development of the students personalized learning environment; to promote students independent learning, as everyone works in his own rhythm; to promote informal communication between the tutor and the students; to change the tutor's role, who will become an assistant, friend, mentor; to create digital educational content of the disciplines. The scientific novelty of the obtained results lies in the fact that on the comprehensive analysis of social internet networks, internet blogs, tourist internet resources basis, their place and role in the information and educational environment of higher education institutions are determined, in particular: the specifics of the content, prospects and mechanisms of the development of the social Internet networks from the point of view of training future tourists are determined; the dependence of the functions of the Social Internet Network, Internet blogs on their structural elements is established. Practical significance. The obtained scientific results are used in the educational process of future specialists in the field of training "Tourism", with the educational qualification "tourism expert, organizer of excursion and animation activities" when teaching the disciplines "study of local lore and tourism", "tourist work", "recreational geography", "geography of Ukraine", "professional competencies in tourism business", "organization of tourist activities". The research practices can be used to conduct tourist, museum, local history, excursion and other types of student's practice.

Endoscopic Transorbital Approach to the Cavernous Sinus Lateral Compartment (Anatomical Cadaver Study).

To determine whether the endoscopic transorbital (ETO) approach could be an alternative and a safer route to access the cavernous sinus (CS) lateral compartment. ETO technique was studied on 3 cadavers and 6 CSes of these cadavers. Endoscopic dissection was visualized with a 0-degree angle endoscope and recorded with fiberoptic cable, light source and camera system and digital video recording system. Superior orbital fissure (SOF), optic canal (OC), anterior ethmoidal artery (AEA) and posterior ethmoidal artery (PEA) foramens were visualized with periorbital dissection. Anterior wall of CS was reached after drilling the optic strut (OS). When the wall was opened, CS lateral and anteroinferior compartments were visualized. Internal carotid artery (ICA) were visualized from proximal ring to the last 2 cm of paraclival carotid artery. Cranial nerves (CNs) within the CS and the course of the interclinoid ligament were revealed. The transorbital endoscopic method is an alternative approach to other techniques for accessing the lateral and anteroinferior compartments of CS. The advantages, disadvantages and limitations of the technique have been determined.

ПЕДАГОГИЧЕСКИЙ ЭКСПЕРИМЕНТ ПО ПРИВНЕСЕНИЮ ДИСЦИПЛИНАРНЫХ КОНЦЕПЦИЙ В ИГРУ: РЕШЕНИЕ ТЕОРЕТИЧЕСКОЙ ПРОБЛЕМЫ СТАНОВИТСЯ ИСТОЧНИКОМ РАЗВИТИЯ ДЛЯ ПЕДАГОГА

Relevant to the development of cultural-historical theory is the contemporary understanding that teacher development was never the focus of Vygotsky’s research. Yet researchers who are studying teacher professional development have increasingly drawn on concepts from cultural-historical theory. Concepts relevant to child development are being used to explain how teachers in schools (Edwards et al., 2019; Ellis, 2007) and preschools (Nuttall et al., 2015) are developing their professional practices. But the question of what is developing for teachers remains unanswered. Th e goal of this paper is to present a study of teacher development over two years. Th e method was an educational experiment (Hedegaard, 2008) where teachers and researchers collaborated on a theoretical problem of how to bring into their play programs discipline concepts. Th e data gathered for the educational experiment included 152 hours of digital video recordings of practices, planning documentation, and 32 hours of weekly interviews. Th e sample included two early childhood teachers over two years from two classrooms. Th e Vygotskian concepts of crisis and Hedegaard’s dialectical concepts of motives and motivation were used to analyze the data. Th e results show how the ongoing small crises experienced over time, when successfully resolved, bring developmental conditions for teachers. Th e conclusion was that development could be theorized as a change in teacher positioning as an outsider of children’s play, to a play position which brought forward a change in teacher motives.

Exploring the structure and content of discourse in remote, rural South African classrooms

The nature of discourse within classrooms strongly predicts students’ ability to think about, around, and with text and content (i.e. comprehension and critical-analytic thinking). However, little is known about the nature of classroom discourse in remote, rural South African schools, a context in which students face well-documented language challenges. The central aim of the present study was to explore the structure and content of discourse in South African classrooms using the 4 components of the Quality Talk model as a frame for our exploration (i.e. instructional frame, discourse elements, teacher moves and pedagogical principles). Grade 8 student participants from 3 classes and their teacher were sampled. Data sources included individual student language assessments, digital video recordings of classroom literacy practices and field notes. Findings revealed that discourse was predominantly characterised by an efferent stance toward text, and the discussions were primarily teacher controlled and directed. There was little, if any, evidence of students’ critical-analytic thinking. Observations in terms of resilience and narratability as well as implications for research and practice are forwarded.

Transformation of Pedagogical Communicative Competence during Creation Digital Online Courses

The purpose of this work is to identify the transformations of communicative functions. These functions are associated with the subjects of communication in both fields: in pedagogical and organizational, also in the instrumental and design once during the process of creating digital video recordings for online courses. Questionnaires, observation, and factor analysis were used as research methods. It helped to formulate a popularity rating of digital tools for future teachers. The study was conducted at the Institute of Psychology and Education of Kazan (Volga region) Federal University. The study involved 120 people: teachers developing online courses and students studying at the pedagogical educational programs. Transforming indicators of pedagogical communicative competence are highlighted. These indicators are needed to be emphasized when improving teacher training. It will help future teachers to be able to effectively carry out their activities in digital educational environment. These indicators are: the ability to organize interactive cooperation during training, the ability to organize mutual exchange and development of students, the ability to create an open environment for analysis and improvement. The methodological aspects of the development of pedagogical communication functions in the dynamic environment of digital education and an interactive environment are disclosed on the basis of work with videos. Some recommendations for future teachers’ skills improving and development of training experience organization in the digital environment are given. These are a clearly-set-goal for educational video materials, adequate video content, skills for digital tools using, also the skill to choose adequate digital tools for a task fulfillment. The tool that can enhance enthusiasm, and stimulate students for productive work in a digital environment. The study allows improving video content and increasing the effectiveness of its use in the educational process. Also, the results of the experiment can become a basis for teacher training programs improving. Especially it can be useful for future teachers’ pedagogical communicative and digital competences development. The tasks developed within the frame of the research will be included in the assignments of pedagogical internship for pedagogical Master’s degree courses at the Institute of Psychology and Education of Kazan Federal University. These tasks for students include development and use of online courses with video materials.

Electronic Evidence: A Necessary Stage in Criminal Justice Development

Digitalization of criminal procedural activity is a complex process that inevitably affects the establishment of evidence procedure. One of the most controversial topics in this direction is the possibility of introducing a new type (source) of evidence: electronic evidence. The paper discusses various scientific approaches that challenge the necessity of its existence. The author expresses his point of view on the possible reasons for this trend. The position of scientists advocating the further development and implementation of electronic evidence is supported. The features of the existence of information in electronic form are described. The influence of the derived nature of the virtual space on the information obtained as a result of cognitive activity is analyzed. The problems of differentiating the information carrier and its content are stated. The specificity of the use of information in electronic form in the context of initial and derivative evidence is investigated. Attention is drawn to the need to develop criteria for electronic evidence in the direction of data authentication, as well as the mandatory involvement at certain stages of persons with special knowledge. The foreign experience of using various electronic devices in the establishment of evidence process is presented. The widespread introduction of digital audio and video recording technologies is emphasized. The concept of "digital evidence" is analyzed.

Some Aspects Related To The Procedural Order Of Fixing Evidence-Based Information In Digital Media

The article analyzes some issues related to the procedural order of collecting, fixing, and consolidating evidence information obtained using digital photography, video recordings and audio recordings.

Capsular tension ring explant complication rate comparison using Miyake-Apple video analysis.

To compare the complication rate and time required to explant standard capsular tension rings (CTRs) vs suture-guided CTRs (SGCTRs). Intermountain Ocular Research Center, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah. Experimental study. Eight cadaver eyes were prepared using standard Miyake-Apple protocol with digital video recording. A 4 clock-hour zonular dialysis was created, followed by a capsulorhexis, hydrodissection, and CTR (n = 4) or SGCTR (n = 4) implantation. With the CTR hidden from view by the overlying iris, ophthalmic surgical instruments were used to remove the CTRs. Time required to remove the CTR and any complications were recorded. A limit of 180 seconds was imposed to determine inability to remove the CTR. In the standard CTR group (n = 4), removal was associated with high rates of complication (100%). Complications included capsular tears (n = 2), dialysis extension (n = 1), and inadvertent intracapsular cataract extraction (n = 1). The SGCTR group had no complications associated with removal (n = 4). Time required to explant a CTR was significantly reduced from 164.5 seconds with standard CTRs to 6.9 seconds with SGCTRs (P = .001). Attempts to remove a standard CTR from the capsular bag was met with a high complication rate. The addition of suture to the leading eyelet of the CTR prior to implantation significantly reduced the time and effort required to remove the CTR and was associated with a significant reduction in complication rates.

'S' means stop! Critical examination of capsular tension ring movements with Miyake-Apple video analysis.

To examine capsular tension ring (CTR) implantation to establish whether there are predictable movements of the CTR during deployment, indicating complicated vs uneventful implantation. Intermountain Ocular Research Center, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah. Experimental study. Nine cadaver eyes were prepared using standard Miyake-Apple protocol with digital video recording. A 4 o'clock-hour zonular dialysis was created, followed by a capsulorhexis and hydrodissection. In 4 eyes, a suture-guided CTR (SGCTR) injector and 8-0 nylon suture through the leading eyelet served as a visible tracer for the CTR. In 5 eyes, a standard CTR was used. The movements of the CTR during implantation were observed. In all eyes, SGCTR and CTR movements were predictable during implantation. All CTRs displayed cardinal movements within the injector, initially adjacent to the side of the inner diameter of the CTR. As the CTR made contact with lens or capsule, it shifted first to the center and then to the opposite side of the injector lumen. The appearance of an S-curve in the surgeon's view coincided with an obstruction of the leading eyelet and stress on the zonular fibers, as viewed with Miyake-Apple analysis. Traumatic CTR implantation might be avoided by understanding the characteristics of uneventful insertion vs an insertion complicated by entrapment or entanglement of the CTR. By recognizing the abnormal movements of the CTR associated with an obstruction, a surgeon might avoid iatrogenic complications.

Experimental studies of the evolution of non-stationary natural convective boundary layers at different heat flux densities on a vertical wall

The evolution of convective flow in a layer of ethyl alcohol with a free surface after sudden heating of one of the vertical walls of a rectangular cavity is experimentally studied. The evolution of a non-stationary hydrodynamic boundary layer on a heated vertical wall in time is studied using digital video recording and computer processing of video films. The evolution of the flow along the free surface of the liquid layer is investigated. Using a thermal imager, the time evolution of the temperature field on a thin metal vertical wall after the flow of a heated liquid is investigated.

Digital video recorder for Raspberry PI cameras with multi-camera synchronous acquisition

Video acquisition and analysis have become integral parts of scientific research. Two major components of a video acquisition system are the choice of camera and the acquisition software. A vast variety of cameras are available on the market. Turnkey multi-camera synchronous acquisition software, however, is not as widely available. For prototyping applications, the Raspberry Pi (RPi) has been widely utilized due to many factors, including cost. There are implementations for video acquisition and preview from a single RPi camera, including one implementation released by the RPi organization itself. However, there are no multi-camera acquisition solutions for the RPi. This paper presents an open-source digital video recorder (DVR) system for the popular RPi camera. The DVR is simple to setup and use for acquisition with a single camera or multiple cameras. In the case of multiple cameras, the acquisition is synchronized between cameras. The DVR comes with a graphical user interface (GUI) to allow previewing the camera streams, setting recording parameters, and associating “names” to cameras. The acquisition code as well as the DVR GUI are written in Python. The open-source software also includes a GUI for playback of recorded video. The versatility of the DVR is demonstrated with a life science research application involving high-throughput monitoring of fruit-flies.

Investigation of Successful Eyedrop Instillation Rates and Analysis of Drop Positions Using High-speed Digital Video Recording System

We investigated the success rates of eyedrop instillation and the distance between the cornea and the dropper tip in 100 volunteers using high-speed digital video recording. Past eyedrop adherence studies assumed that instillation occurred without failure. The ideal distance between the cornea and dropper tip remained unclear, although the general estimate was approximately 2.54 cm (1 inch). This study was approved by the Institutional Review Boards of all participating medical institutions, and all volunteers provided written, informed consent. Successful instillation was defined as when 1 drop fell accurately into the eye on the first attempt. The instillation of ≥2 drops or drops delivered outside the eye was considered a failure. The distance between the eye and dropper tip was measured using still images from a paused digital video camera and a digital ruler. Forty percent of the volunteers instilled eyedrops without instructions from ophthalmologists, pharmacists, or other healthcare workers. When the images were analyzed, the success rate of the first instillation was 70.1%. When the eye was arbitrarily divided into 9 sections, most of the drop sites were the iris or the center of the eye. The distance between the dropper tip and cornea was 2.62±1.75 (median 2.20) cm. These results indicate that the generally recommended distance is usually followed. The successful instillation rate based on the distance from the dropper tip to the cornea was 77% at 1.6±0.88 cm and 54.9% at 4.8±1.25 cm.

A highly sensitive colorimetric assessment of hexavalent chromium using a digital camera.

Simple, low-cost, and sensitive methods for the assessment of hexavalent chromium as an important environmental pollutant are highly desirable, especially under resource-limited settings. Therefore, herein we propose an original approach for the simple, low-cost, selective, and extremely sensitive assessment of Cr(VI) utilizing its catalysis of the micellar sensitized o-dianisidine (DA)-hydrogen peroxide reaction. The initial rate of the amended reaction is monitored by tracing the oxidation product, either by a digital camera video recording or spectrophotometrically at 440 nm, for 120 s from mixing the reactants. The optimized reaction conditions were 5 mmol L-1 DA, 0.6 mol L-1 H2O2, 2.0 v/v% Tween 20, and 10 mmol L-1 chloroacetate buffer (pH 4.5 ± 0.1), at 30 °C. The linear calibration graph extends to 90.0 ng mL-1 Cr(VI) with detection limits (3Sb) of 0.8 and 1.0 ng mL-1, for the video recording and spectrophotometric procedures, respectively. The amended method was successfully applied to the assessment of Cr(IV) in natural and polluted industrial wastewaters. The analytical data were in excellent statistical harmony with those of the standard ETAAS method. The proposed method is two orders of magnitude more sensitive than the diphenylcarbazide standard spectrophotometric method.Graphical abstract.

Burrow ambient temperature influences Helice crab activity and availability for migratory Red-crowned cranes Grus japonensis.

For migratory birds that specialize on particular benthic macroinvertebrate species, the timing of migration is critical since prey availability may be temporally limited and a function of local ambient temperature. Hence, variation in local ambient temperature can influence the diet composition of migrant birds, and, consequently, they may be constrained by which stopover and wintering sites they are able to utilize during periods of colder temperatures. Here, we use fecal analysis, observer‐based population counts, digital video recordings, and temperature data to test five predictions regarding the influence of local ambient temperature on the activity and availability of mudflat crabs—a key prey resource at three staging/wintering sites in eastern China, for migratory Red‐crowned cranes (Grus japonensis) and how this subsequently influences crane diet and use of wetland sites. Pearson's correlations and generalized linear models revealed that mudflat crabs became significantly more surface active with increasing burrow ambient temperature. Piecewise regression analysis revealed that crab surface activity was largely limited to a burrow ambient temperature threshold between 12 and 13℃ after which activity significantly increased. Crab activity declining temporally during the crane's autumn migration period but increased during spring migration. Crabs accounted for a significant proportion of crane diet at two of three sites; however, the frequency of crab remains was significantly different between sites, and between autumn and spring migration. Analyses of crane count data revealed a degree of congruence between the migration timing of Red‐crowned cranes with periods of warmer ambient temperature, and a significant, positive correlation between the percentage of crab remains in crane feces and site ambient temperature. Collectively, our data suggest that temperature‐related mudflat crab activity may provide an important time window for migratory Red‐crowned cranes to utilize critical stopover sites and the crabs’ food resources.