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1.
Br J Educ Psychol ; 93 Suppl 2: 287-304, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36282552

RESUMO

BACKGROUND: Self-management of cognitive load is a recent development in cognitive load theory. Finger pointing has been shown to be a potential self-management strategy to support learning from spatially separated, but mutually referring text and pictures (i.e., split-attention examples). AIMS: The present study aimed to extend the prior research on the pointing strategy and investigated the effects of finger pointing on learning from online split-attention examples. Moreover, we examined an alternative pointing strategy using the computer mouse, and a combination of finger pointing and computer-mouse pointing. SAMPLE: One-hundred and forty-five university students participated in the present study. METHOD: All participants studied an online split-attention example about the human nervous system and were randomly allocated to one of four conditions: (1) pointing with the index finger, (2) pointing with the computer mouse, (3) pointing with the index finger and the computer mouse and (4) no pointing. RESULTS: Results confirmed our main hypothesis, indicating that finger pointing led to higher retention performance than no pointing. However, the mouse pointing strategy and the combined finger and mouse pointing strategy did not show supportive effects. CONCLUSIONS: Finger pointing can be used as a simple and convenient self-management strategy in online learning environments. Mouse pointing may not be as effective as finger pointing.


Assuntos
Atenção , Cognição , Humanos , Atenção/fisiologia , Dedos , Periféricos de Computador
2.
Acad Radiol ; 29(9): 1387-1393, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-34953728

RESUMO

RATIONALE AND OBJECTIVES: To determine if ergonomic improvements in a radiology department can decrease repetitive stress injuries (RSIs), advance ergonomics knowledge, and improve well-being. MATERIALS AND METHODS: Radiologists in an academic institution were surveyed regarding physician wellness, workstations, RSIs, and ergonomics knowledge before and after interventions over 1 year. Interventions included committee formation, education, wrist pads and wireless mice, broken table and chair replacement, and cord organization. Mann-Whitney U test was used for analysis. RESULTS: Survey response was 40% preinterventions (59/147), and 42% (66/157) postinterventions. Preinterventions, of radiologists with RSI history, 17/40 (42%) reported the RSI caused symptoms which can lead to burnout, and 15/40 (37%) responded their RSI made them think about leaving their job. Twenty-three of 59 (39%) radiologists had an active RSI preinterventions. Postinterventions, 9/25 (36%) RSI resolved, 13/25 (52%) RSI improved, and 3/25 (12%) RSI did not improve. RSI improvements were attributed to ergonomic interventions in 19/25 (76%) and therapy in 2/25 (8%). Radiologists who thought their workstation was designed with well-being in mind increased from 9/59 (15%) to 52/64 (81%). The percentage of radiologists knowing little or nothing about ergonomics decreased from 15/59 (25%) to 5/64 (8%). After ergonomics interventions, more radiologists thought the administration cared about safety and ergonomics, equipment was distributed fairly, and radiologists had the ability to ask for equipment (p < .01). Fifty-three of 64 (83%) of radiologists after interventions said improving workstation ergonomic design contributed to well-being. CONCLUSION: Ergonomic improvements in radiology can decrease RSIs, advance ergonomics knowledge, and improve well-being.


Assuntos
Transtornos Traumáticos Cumulativos/prevenção & controle , Ergonomia/normas , Doenças Musculoesqueléticas/complicações , Radiologistas/psicologia , Radiologia , Periféricos de Computador/classificação , Periféricos de Computador/normas , Transtornos Traumáticos Cumulativos/etiologia , Ergonomia/métodos , Humanos , Doenças Musculoesqueléticas/etiologia , Radiologia/métodos , Radiologia/normas , Inquéritos e Questionários
3.
Int J Occup Saf Ergon ; 28(1): 333-342, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32270750

RESUMO

Purpose. Vertical and slanted mouse models have been developed to reduce forearm pronation. Discomfort, performance and stresses have been analyzed with these mice in previous studies but not learning during the familiarization phase. Methods. Eighteen females performed repeated pointing-clicking tasks with a standard mouse used as a reference followed by a slanted mouse and a vertical mouse in a randomized order. The duration of each task was measured. For each participant-mouse combination, changes in duration upon repeating the task were analyzed using a statistical model including a log-linear slope followed by a plateau. We consider that when the plateau is reached, the participant is familiar with the task. Results. For both the slanted mouse and the vertical mouse, the plateau is reached after about 30 repetitions of the task. The duration of the plateau was similar for these two mouse models. For the vertical mouse only, the slope increased significantly when used second versus when used first. Conclusion. Learning speed appeared slower with the vertical mouse than with the slanted mouse. In light of these findings and those of previous studies, decision-makers and employees should consider the slanted mouse rather than the vertical mouse.


Assuntos
Desenho de Equipamento , Desempenho Psicomotor , Análise e Desempenho de Tarefas , Interface Usuário-Computador , Periféricos de Computador , Feminino , Humanos
4.
Clin Orthop Surg ; 13(3): 436-446, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34484637

RESUMO

BACKGROUND: The advancement of computer information technology would maximize its potential in operating rooms with touchless input devices. A picture archiving and communication system (PACS) was compared with a touchless input device (LMC-GW), relaying to another person to control a mouse through verbal guidance, and directly controlling a mouse. METHODS: Participants (n = 34; mean age, 29.6 years) were prospectively enrolled and given nine scenarios to compare the three methods. Each scenario consisted of eight tasks, which required 6 essential functions of PACS. Time elapsed and measurement values were recorded for objective evaluation, while subjective evaluation was conducted with a questionnaire. RESULTS: In all 8 tasks, manipulation using the mouse took significantly less time than the other methods (all p < 0.05). Study selection, panning, zooming, scrolling, distance measuring, and leg length measurement took significantly less time when LMC-GW was used compared to relaying to another person (all p < 0.01), whereas there were no significant differences in time required for measuring the angles and windowing. Although the touchless input device provided higher accessibility and lower contamination risk, it was more difficult to handle than the other input methods (all p < 0.01). CONCLUSIONS: The touchless input device provided superior or equal performance to the method of verbal instruction in the environment of operating room. Surgeons agreed that the device would be helpful for manipulating PACS in operating rooms with less contamination risk and disturbance of workflow. The touchless input device can be an alternative option for direct manipulation of a mouse in operation rooms in the future.


Assuntos
Periféricos de Computador , Sistemas Computacionais , Salas Cirúrgicas , Sistemas de Informação em Radiologia , Interface Usuário-Computador , Adulto , Feminino , Humanos , Masculino , Estudos Prospectivos
5.
Work ; 68(4): 981-992, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33867366

RESUMO

BACKGROUND: As millions of workers have shifted to telework, special accommodations for workers with respect to ergonomics may be required to ensure the workforce remains healthy. METHODS: A survey about home office ergonomics and discomfort was sent to faculty, staff, and administrators by email and was completed by 843 individuals. RESULTS: Over 40%of the participants reported moderate to severe discomfort (severe low/middle back pain, moderate discomfort in eyes/neck/head, and discomfort in the upper back/shoulders). Laptops (always and often) were widely used (85%) with most using the laptop monitor (55%) of all respondents. Further, less than 45%of the seating conditions were reported as having adjustable arm rests. CONCLUSION: As teleworking in makeshift offices becomes more common, the risk of significant discomfort and potentially more serious musculoskeletal disorders may result from poor static postures. Companies may need to accommodate workers by allowing them to take home office chairs, external monitors, keyboards, and mice as laptops are insufficient, ergonomically.


Assuntos
COVID-19 , Ergonomia , Doenças Musculoesqueléticas/prevenção & controle , Doenças Profissionais/prevenção & controle , Teletrabalho , Adulto , Periféricos de Computador , Humanos , Pandemias , SARS-CoV-2 , Universidades
6.
ACS Appl Mater Interfaces ; 13(9): 11369-11384, 2021 Mar 10.
Artigo em Inglês | MEDLINE | ID: mdl-33625223

RESUMO

The inkjet printing of metal electrodes on polymer films is a desirable manufacturing process due to its simplicity but is limited by the lack of thermal stability and serious delaminating flaws in various aqueous and organic solutions. Kapton, adopted worldwide due to its superior thermal durability, allows the high-temperature sintering of nanoparticle-based metal inks. By carefully selecting inks (Ag and Au) and Kapton substrates (Kapton HN films with a thickness of 135 µm and a thermal resistance of up to 400 °C) with optimal printing parameters and simplified post-treatments (sintering), outstanding film integrity, thermal stability, and antidelaminating features were obtained in both aqueous and organic solutions without any pretreatment strategy (surface modification). These films were applied in four novel devices: a solid-state ion-selective (IS) nitrate (NO3-) sensor, a single-stranded DNA (ssDNA)-based mercury (Hg2+) aptasensor, a low-cost protein printed circuit board (PCB) sensor, and a long-lasting organic thin-film transistor (OTFT). The IS NO3- sensor displayed a linear sensitivity range between 10-4.5 and 10-1 M (r2 = 0.9912), with a limit of detection of 2 ppm for NO3-. The Hg2+ sensor exhibited a linear correlation (r2 = 0.8806) between the change in the transfer resistance (RCT) and the increasing concentration of Hg2+. The protein PCB sensor provided a label-free method for protein detection. Finally, the OTFT demonstrated stable performance, with mobility values in the linear (µlin) and saturation (µsat) regimes of 0.0083 ± 0.0026 and 0.0237 ± 0.0079 cm2 V-1 S-1, respectively, and a threshold voltage (Vth) of -6.75 ± 3.89 V.


Assuntos
Imidas/química , Mercúrio/análise , Nitratos/análise , Polímeros/química , Proteínas/análise , Aptâmeros de Nucleotídeos/química , Técnicas Biossensoriais/instrumentação , Técnicas Biossensoriais/métodos , Periféricos de Computador , DNA/química , Técnicas Eletroquímicas/instrumentação , Técnicas Eletroquímicas/métodos , Eletrodos , Ouro/química , Tinta , Limite de Detecção , Prata/química , Transistores Eletrônicos
8.
J Occup Health ; 63(1): e12194, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33534962

RESUMO

OBJECTIVES: Our study aimed to investigate the association between comprehensive workstations and neck and upper-limb pain (NUP) among office workers. METHODS: This cross-sectional study included 307 office workers (median age, 39 years; 88% men). Workstations (presence of armrest, armrest position, number of monitors used, mouse position, mouse usage, keyboard usage, and keyboard position) were investigated in terms of 17 items and judged as "adequate" or "inadequate." NUP was assessed using a numerical rating scale. NUP locations included the neck, shoulder, elbow, and wrist. In the statistical analysis, outcome variables were the presence of pain in each part, while explanatory variables were the number of inadequate workstations. Logistic regression analyses were conducted with adjustment for age, gender, working duration, and exercise habit. RESULTS: The prevalence of neck pain was 47% (n = 143), shoulder pain was 50% (n = 153), elbow pain was 7.2% (n = 22), and wrist pain was 13% (n = 40). In the adjusted model, the number of inadequate workstations had significant positive associations with elbow pain (odds ratio [OR], 1.39; 95% confidence interval [CI], 1.06.1.81) and wrist pain (OR, 1.80; 95% CI, 1.17.2.26). However, the number of inadequate workstations was not significantly associated with neck pain or shoulder pain. CONCLUSIONS: Workstation-related factors (presence of armrest, armrest position, mouse usage, and keyboard usage) were significantly associated with elbow and wrist pain. Our findings suggest that workstations can contribute to elbow and wrist pain in office workers.


Assuntos
Periféricos de Computador/estatística & dados numéricos , Dor Musculoesquelética/epidemiologia , Cervicalgia/epidemiologia , Doenças Profissionais/epidemiologia , Extremidade Superior , Adulto , Computadores , Estudos Transversais , Feminino , Humanos , Japão/epidemiologia , Masculino , Pessoa de Meia-Idade , Doenças Profissionais/etiologia , Inquéritos e Questionários , Trabalho
9.
Hum Factors ; 63(7): 1182-1195, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-32374635

RESUMO

OBJECTIVE: The aim of this study is to examine the interactive effects of display curvature radius and display size on visual search accuracy, visual search speed, and visual fatigue. BACKGROUND: Although the advantages of curved displays have been reported, little is known about the interactive effects of display curvature radius and size. METHOD: Twenty-seven individuals performed visual search tasks at a viewing distance of 50 cm using eight configurations involving four display curvature radii (400R, 600R, 1200R, and flat) and two display sizes (33″ and 50″). To simulate curved screens, five flat display panels were horizontally arranged with their centers concentrically repositioned following each display curvature radius. RESULTS: For accuracy, speed, and fatigue, 33″-600R and 50″-600R provided the best or comparable-to-best results, whereas 50″-flat provided the worst results. For accuracy and fatigue, 33″-flat was the second worst. The changes in the horizontal field of view and viewing angle due to display curvature as well as the association between effective display curvature radii and empirical horopter (loci of perceived equidistance) can explain these results. CONCLUSION: The interactive effects of display curvature radius and size were evident for visual search performance and fatigue. Beneficial effects of curved displays were maintained across 33″ and 50″, whereas increasing flat display size from 33″ to 50″ was detrimental. APPLICATION: For visual search tasks at a viewing distance of 50 cm, 33″-600R and 50″ 600R displays are recommended, as opposed to 33″ and 50″ flat displays. Wide flat displays must be carefully considered for visual display terminal tasks.


Assuntos
Periféricos de Computador , Apresentação de Dados , Astenopia/epidemiologia , Desenho de Equipamento , Humanos , Análise e Desempenho de Tarefas , Interface Usuário-Computador , Percepção Visual
10.
IEEE Trans Cybern ; 51(9): 4528-4539, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31794415

RESUMO

Text entry aims to provide an effective and efficient pathway for humans to deliver their messages to computers. With the advent of mobile computing, the recent focus of text-entry research has moved from physical keyboards to soft keyboards. Current soft keyboards, however, increase the typo rate due to a lack of tactile feedback and degrade the usability of mobile devices due to their large portion on screens. To tackle these limitations, we propose a fully imaginary keyboard (I-Keyboard) with a deep neural decoder (DND). The invisibility of I-Keyboard maximizes the usability of mobile devices and DND empowered by a deep neural architecture allows users to start typing from any position on the touch screens at any angle. To the best of our knowledge, the eyes-free ten-finger typing scenario of I-Keyboard which does not necessitate both a calibration step and a predefined region for typing is first explored in this article. For the purpose of training DND, we collected the largest user data in the process of developing I-Keyboard. We verified the performance of the proposed I-Keyboard and DND by conducting a series of comprehensive simulations and experiments under various conditions. I-Keyboard showed 18.95% and 4.06% increases in typing speed (45.57 words per minute) and accuracy (95.84%), respectively, over the baseline.


Assuntos
Dedos , Extremidade Superior , Periféricos de Computador , Desenho de Equipamento , Ergonomia , Retroalimentação , Humanos , Interface Usuário-Computador
11.
Appl Ergon ; 90: 103270, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-32920221

RESUMO

With advances in information technology, people spend more time on touchscreen-based virtual keyboards than physical keyboards. However, typing on touchscreens usually lacks informative tactile feedback and anchoring references to locate the right keys, and thus requires more visual attention. Most prior tactile keyboard research used single stimulus pattern, which was not enough to recognize different keys. The purpose of this study was to investigate the usability of multiple vibrotactile feedback patterns in an entire virtual QWERTY keyboard input. A set of highly discriminable vibration patterns was designed and associated with different regions of a virtual keyboard to help users to locate the right keys. However, the number of stimulus patterns might also affect the typing performance. A user study was conducted to evaluate the effectiveness of the multiple vibrotactile feedback. The results showed that an appropriate number of stimulus patterns provided higher typing speed, higher typing efficiency, and lower error rate.


Assuntos
Periféricos de Computador , Vibração , Desenho de Equipamento , Retroalimentação , Humanos , Tecnologia da Informação
12.
Sci Justice ; 61(1): 89-96, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-33357831

RESUMO

Digital devices now play an important role in the lives of many in society. Whilst they are used predominantly for legitimate purposes, instances of digital crime are witnessed, where determining their usage is important to any criminal investigation. Typically, when determining who has used a digital device, digital forensic analysis is utilised, however, biological trace evidence or fingerprints residing on its surfaces may also be of value. This work provides a preliminary study which examines the potential for fingerprint recovery from computer peripherals, namely keyboards and mice. Our implementation methodology is outlined, and results discussed which indicate that print recovery is possible. Findings are intended to support those operating at-scene in an evidence collection capacity.


Assuntos
Crime , Medicina Legal , Periféricos de Computador , Medicina Legal/métodos , Humanos
13.
J Manipulative Physiol Ther ; 43(8): 760-767, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32888701

RESUMO

OBJECTIVE: The purpose of this study was to compare 2 alternative methods, the radiologic Harrison Posterior Tangent Method (HPTM) and the nonradiologic Spinal Mouse (SM), to the Cobb angle for measuring lumbar lordosis. METHODS: Sixteen participants with previously existing lateral lumbopelvic radiographs underwent nonradiographic lordosis assessment with a Spinal Mouse. Then 2 investigators analyzed each radiograph twice using the Harrison Posterior Tangent Method and Cobb angle. Correlations were analyzed between HPTM, the Cobb angle, and SM using the Spearman rank correlation coefficient; intraexaminer and interexaminer agreement were analyzed for HPTM and the Cobb angle using intraclass correlation coefficients. RESULTS: The HPTM correlated highly with the Cobb angle (Spearman ρ = 0.936, P < .001); SM had moderate to strong correlations with the Cobb angle (ρ = 0.737, P = .002) and HPTM (ρ = 0.707, P = .003). Intraexaminer and interexaminer agreement for the Cobb angle and HPTM were excellent (all intraclass correlation coefficients > 0.90). One participant had slight kyphosis according to HPTM and SM analyses (which consider the entire lumbar region), whereas the Cobb angle, based only on L1 and L5, reported mild lordosis for that participant. CONCLUSION: In this sample, HPTM measurements showed high correlation with the commonly used Cobb angle, but this method requires more time and effort, and normal values have not been established. The SM may be an alternative when radiographs are inappropriate, but it measures soft tissue contours rather than lordosis itself.


Assuntos
Diagnóstico por Imagem/métodos , Lordose/diagnóstico por imagem , Vértebras Lombares/diagnóstico por imagem , Região Lombossacral/diagnóstico por imagem , Pesos e Medidas , Adulto , Animais , Periféricos de Computador , Equipamentos para Diagnóstico , Diagnóstico por Imagem/instrumentação , Feminino , Humanos , Cifose/diagnóstico , Cifose/diagnóstico por imagem , Lordose/diagnóstico , Masculino , Pessoa de Meia-Idade , Radiografia , Pesos e Medidas/instrumentação , Adulto Jovem
14.
IEEE Trans Neural Syst Rehabil Eng ; 28(7): 1566-1572, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-32634095

RESUMO

The purpose of this study is to investigate the effects of different cursor click modalities in an alternative computer access device using accelerometry from head tilt to control cursor movement. Eighteen healthy adults performed a target acquisition task using the device with five different cursor click modalities, while maintaining cursor movement control via accelerometry. Three dwell-based click modalities with dwell times of 0.5 s, 1.0 s, and 1.5 s were tested. Two surface electromyography-based click modalities - with the sensor placed next to the eye for a blink and above the eyebrow for a brow raise - were tested. Performance was evaluated using metrics of target selection accuracy, path efficiency, target selection time, and user effort. Surface electromyography-based click modalities were as fast as the shortest dwell time and as accurate as the longest dwell time, and also minimized user effort. Three of the four performance metrics were not affected by sensor location. Future studies will investigate if these results are similar in individuals with neuromuscular disorders.


Assuntos
Periféricos de Computador , Interface Usuário-Computador , Acelerometria , Adulto , Computadores , Eletromiografia , Humanos
15.
Eur Radiol ; 30(9): 5200-5208, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32333147

RESUMO

OBJECTIVE: To evaluate the use of two alternative picture archiving and communication systems (PACS) interface devices (a graphics tablet and a handheld controller) in clinical practice and on task-oriented exercises. MATERIAL AND METHODS: Eleven senior radiologists were prospectively evaluated. The participants used the two tested interface devices for 10 working periods each and answered a questionnaire to evaluate the ergonomics of this experience. The prevalence of work-related musculoskeletal discomfort with the standard PACS interface set (mouse-keyboard-recording device) and these two devices was assessed. Exercises evaluating image scrolling and selection, image zooming and panning, image windowing, performing measurements, and reporting were performed with the standard PACS interface set and with the two tested devices. The sitting posture and hand position were evaluated. RESULTS: The general appreciation of the two alternative interface devices was considered to be similar to that of the standard interface set. The ergonomics of the handheld controller was considered to be slightly better than that of the standard interface set. The prevalence of musculoskeletal discomfort was 81%, 45%, and 18% for the standard interface set, graphics tablet, and handheld controller, respectively. With the graphics tablet and the handheld controller in 45% and 60%, respectively, there was a working posture change with respect to the standard interface set. The mean total exercise completion times of both tested devices were 27% higher than that of the standard interface set. CONCLUSION: Despite the increase in completion time of the task-oriented exercises, the tested devices were well accepted and considered to be more comfortable than the standard set. KEY POINTS: • Alternative PACS interface devices can be used as a substitute for the standard mouse-keyboard-recording device set with a potential improvement in work ergonomics and a reduction in work-related musculoskeletal discomfort.


Assuntos
Ergonomia , Postura , Radiologistas , Sistemas de Informação em Radiologia , Adulto , Atitude do Pessoal de Saúde , Periféricos de Computador , Computadores de Mão , Feminino , Humanos , Masculino , Dor Musculoesquelética , Saúde Ocupacional , Fatores de Tempo , Interface Usuário-Computador
18.
Comput Methods Programs Biomed ; 192: 105402, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32208301

RESUMO

One in every 200 people worldwide cannot express orally because of cognitive, motor, neurological, or emotional problems. Assistive technologies can help people with impairments to use computers to perform their daily life activities independently and to communicate with others. This paper presents a Hidden Markov Model-based word prediction method that allows keyboard emulation software to predict words so that children with disabilities can type texts more quickly. The proposed system involved the development of a keyboard emulator, the construction and processing of a corpus, as well as a word prediction algorithm. Children with different cognitive profiles had to produce a text and type it twice: first with free typing, second using the virtual keyboard's word prediction. Results indicated the word prediction of the keyboard emulator software reduced typing efforts. However, the software initially increased the typing time when the corpus was not well adapted to users. The total amount of clicks with word prediction decreased by around 26.2%. Regarding execution time using prediction, 61% typed the text in less time. The tests performed with literate volunteers indicated a reduction in the number of clicks by up to 51.3%. This result surpasses the 15% achieved in the previous study by Free Virtual Keyboard with word prediction based on pure statistics. Moreover, all volunteers required fewer clicks to perform the task. People with impairments, especially children, could use the system and demonstrate their knowledge and abilities. The entire system is available on the Internet and users have unrestricted and free access to it.


Assuntos
Paralisia Cerebral , Comunicação , Periféricos de Computador , Tecnologia Assistiva , Algoritmos , Criança , Humanos , Interface Usuário-Computador
19.
PLoS One ; 15(3): e0229645, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32119705

RESUMO

Solid-state drives (SSDs) that do not have internal dynamic random-access memory (DRAM) are being widely spread for client SSD and embedded SSD markets in recent years because they are cheap and consume less power. Obviously, their performance is lower than conventional SSDs because they cannot exploit advantages of DRAM in the controller. However, this problem can be alleviated by using host memory buffer (HMB) feature of Non-Volatile Memory Express (NVMe), which allows SSDs to utilize the DRAM of host. In this paper, we show that commercial DRAM-less SSDs clearly exhibit worse I/O performance than SSDs with internal DRAM, but this can be improved by using the HMB feature. We also present methods that reveal how the host memory buffer is used in commercial DRAM-less SSDs to improve I/O performance. Through extensive experiments, we conclude that DRAM-less SSDs evaluated in this study mainly exploit the host memory buffer as an address mapping table cache rather than a read cache or write buffer to improve I/O performance.


Assuntos
Periféricos de Computador/tendências , Dispositivos de Armazenamento em Computador/tendências , Computadores/tendências , Algoritmos , Periféricos de Computador/economia , Periféricos de Computador/estatística & dados numéricos , Dispositivos de Armazenamento em Computador/estatística & dados numéricos
20.
Sci Justice ; 60(2): 99-107, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32111294

RESUMO

The purpose of this review paper is to highlight various geomatic techniques that crime scene reconstructionists or forensic practitioners can use to document different kinds of scenes, highlighting the advantages, disadvantages, and when best to use each technology. This paper explores geomatic techniques such as a total station, photogrammetry, laser scanners and structured light scanners and how they can be used to reconstruct crime scenes. The goal of this paper is not to discredit manual methods, as they are long standing and reliable, but instead to shed light on alternative methods that may produce equally or more accurate results with a more visually appealing final product. It is important for law enforcement and forensic professionals to understand the advantages and disadvantages of each technique, knowing when certain techniques should be used (and when they should not), and being able to revert to traditional methods if required.


Assuntos
Documentação/métodos , Ciências Forenses/instrumentação , Imageamento Tridimensional , Fotogrametria , Periféricos de Computador , Software
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