Navigation Research Articles

Farklı Nesnelere Göre Navigasyon Yolunun Revizyonu

Bu calisma bir mobil robot navigasyonu ile ilgilidir. Mobil robotlari hareket ettirmek icin navigasyon algoritmalarina ihtiyac duyulur. Bu algoritmalar sayesinde robotlarin belirlenen baslangic noktasindan hedef noktasina hareketi saglanir. Bununla birlikte, robot navigasyonu sirasinda engellerden kacinma iyi bir navigasyon algoritmasinin ihtiyac duydugu gereksinimlerden birisidir. Engellerden kacinma icin bilinen bir haritadaki engeller goz onune alinarak navigasyon yolu olusturulur. Bir diger yontem ise navigasyon sirasinda aktif bir sekilde tarama yapilarak engellerin olmadigi yollarin tercih edilmesidir. Ote yandan klasik engel belirleme veya engelden kacinma algoritmalari nesnelerin canli veya cansiz olmasini goz ardi eder. Boylece butun engeller ayni gorulur ve robot bu engellerden kacinarak yolunu takip eder. Gunumuz yasantisinda robotlarin insanlarin oldugu ortamlarda kullanimi giderek yayginlasmaktadir. Robotlar insanlarin oldugu ortamlarda da kendilerine atanan gorevleri icra etmelidir. Ote yandan insanlara klasik bir engel gibi davranilmasi mevcut navigasyon algoritmalarinin en onemli eksikliklerinden birisidir. Bu tip bir durumda insanlarin robotlarin varligindan rahatsiz olabilmektedir. Bu sebeple, klasik navigasyon algoritmalarinda karsilasilan engelden kacinma algoritmalari insanlara yaklasim mesafesini baz alarak revize edilmesi daha iyi bir navigasyon semasi olusturacaktir. Bu kapsamda bu calisma icerisinde insan ve diger nesneler arasi bir ayrim yapilmistir. Robot, insanlara proxemics teorisini baz alacak sekilde bir sosyal mesafe koyarak navigasyon yollarini guncellemektedir. Boylece insanlarin ihtiyac duydugu sosyal mesafe saglanarak insanlari daha konforlu hissettirecek bir navigasyon olusturabilmistir.

Book Review: Boys & Sex: Young Men on Hookups, Love, Porn, Consent, and Navigating the New Masculinity

Book Review: Boys & Sex: Young Men on Hookups, Love, Porn, Consent, and Navigating the New Masculinity

Análises dos motivos da rejeição da ferramenta Remarketing

Objetivo: O objetivo deste estudo foi analisar os motivos que suscitam a rejeição dos consumidores à ferramenta de coleta e uso de dados de navegação denominada remarketing.Método: Este artigo apresentou uma abordagem pluralística por meio de etapa exploratória e etapa conclusivo descritiva, baseada em três modelos teóricos de rejeição a publicidade. Homens e mulheres responderam a perguntas relacionadas a sua percepção sobre o uso de dados de navegação e o remarketing.Originalidade: Pela primeira vez, foi testado empiricamente a síntese dos modelos desenvolvidos por Cho; Cheon (2004), Kelly; Kerr; Drennan (2010) e Yaakop (2013) para analisar a possibilidade de rejeição dos consumidores com relação a um tipo relativamente novo de propaganda, o remarketing.Resultados: Os resultados apontaram um grande poder explicativo - 85%, sendo os constructos Desordem, Relevância, Invasão e Credibilidade os principais preditores do comportamento de rejeição.Contribuições: Devido a carência de trabalhos empíricos que versem sobre o assunto no contexto brasileiro, e as crescentes possibilidades de utilização de dados de navegação o presente estudo aprofunda os conhecimentos existente e dá suporte empírico para estudos subsequentes.

Eficacia de un programa de formación en competencias digitales aplicado a estudiantes del grado de magisterio en educación primaria basado en el modelo Affective elearning+

Introducción. El presente estudio analiza las diferencias estadísticamente significativas existentes en el grado de dominio de la competencia digital, contemplada desde 4 dimensiones y criterios de desempeño (navegación y resolución de problemas; disposiciones legales, derechos de autor y licencias; desarrollo y creación de contenido e interacción y gestión de la identidad digital), existente entre los estudiantes del grupo que participó en un programa de formación online basado en el modelo Affective eLearning+, y aquellos que actuaron de control. El plan formativo evaluado se llevó a cabo durante el desarrollo del proyecto I+D+i denominado Evaluación y desarrollo de dos competencias genéricas en estudiantes de primer año del grado de maestro en educación primaria, que finalizaron algo más de un centenar de estudiantes del Grado de Magisterio de Educación Primaria de las Facultades de Educación de la Universidad de Oviedo, la Universidad de Jaén y en el Centro Universitario SAFA (adscrito a la Universidad de Jaén). Método. Se aplicó un cuestionario de creación propia pretest-postest tanto al grupo experimental como control y se analizaron los resultados con las pruebas estadísticas de Kolmogorov-Smirnov, Levene y t de Student. Resultados. Las diferencias significativas obtenidas tras aplicar el programa entre los grupos experimental y control presentan un balance claramente favorable en 9 de los 13 desempeños competenciales trabajados es decir del 70% de las competencias evaluadas. Discusión. Ello subraya que el modelo Affective eLearnig+ es eficaz para desarrollar competencias profesionales digitales en un clima de bienestar y satisfacción en las personas a las que se aplica. Introduction. This study analyzes the statistically significant differences in the degree of mastery of digital competence, contemplated from 4 dimensions and performance criteria (navigation and resolution of problems, legal provisions, copyrights and licenses, development and creation of content and interaction and management of digital identity), existing among students of the group that participated in an online training program based on the Affective eLearning+ model, and those who acted as control. The training plan evaluated was carried out during the development of the R + D + i project called Evaluation and development of two generic competences in first year students of the grade of teacher in primary education, which ended something more than a hundred of students of the Degree of Teaching of Primary Education of the Faculties of Education of the University of Oviedo, the University of Jaén and in the University Center SAFA (attached to the University of Jaén). Method. A pre-test-posttest self-created questionnaire was applied to both the experimental and control groups and the results were analyzed with the Kolmogorov-Smirnov, Levene and t-Student statistical tests. Results. The significant differences obtained after applying the program between the experimental and control groups present a clearly favorable balance in 9 of the 13 competences performed, that is, 70% of the evaluated competences. Discussion. This emphasizes that the Affective eLearning+ model is effective in developing digital professional skills in a climate of well-being and satisfaction of the people to whom it applies.

200. Comparison of freehand, fluoro-guided, CT navigation, and robot-guided TLIF and ALIF

BACKGROUND CONTEXT Screw placement in transforaminal interbody fusion (TLIF) and anterior lumbar interbody fusion (ALIF) can be done with open free hand (FH), fluoroscopy-guided (FG), spinal navigation (NAV), or robotic guided (RG) techniques. Varied techniques may affect perioperative (periop) outcomes. Few studies compare all four guidance techniques. PURPOSE Compare the perioperative outcomes between FH, FG, NAV, and RG TLIF and ALIF. STUDY DESIGN/SETTING Single center retrospective cohort study PATIENT SAMPLE A total of 1,646 patients who underwent 1-2 level TLIF or 1-3 level ALIF from 2012-2019. OUTCOME MEASURES Outcomes: registration failure, operative time (OT), radiation dosage (RD), estimated blood loss (EBL), length of stay (LOS), and periop complications, and retursn to OR up to 90 days. METHODS Patients undergoing 1-2 level TLIF or 1-3 level ALIF were included. Analysis of variance (ANOVA) and χ2test were used to analyze differences in outcomes with significance set at p RESULTS A total of 1,202 1-2 level TLIFs were included (843 FH, 175 FG, 40 NAV, 144 RG) TLIFS. 444 1-3 level ALIFs were included: 337 FH, 25 FG, and 80 RG ALIFs. Demographics were similar amongst ALIF cohorts except significantly more FH-ALIF smokers and TLIF cohorts after propensity matching for levels fused. Amongst the TLIF Cohorts: OT and LOS longest in NAV (291.67±89.85 min; p CONCLUSIONS NAV-TLIF had significantly differences in EBL, RD, periop complications, and return to OR 30 days. PSM for levels fused show postop complications rate remain significant with other factors and radiographic dosage remaining significant. RG TLIF and RG ALIF had the worst perioperative complications. FDA DEVICE/DRUG STATUS This abstract does not discuss or include any applicable devices or drugs.

Deixa meu cabelo em paz e outros contos sobre Arqueologia do Racismo à Brasileira

Este texto explora possibilidades a uma arqueologia do racismo à brasileira com base em uma auto-arqueologia do passado contemporâneo para o Brasil. Ressalta questões relacionadas à ausência de reflexões sobre o problema na prática arqueológica. Navega pela materialidade de símbolos de opressão que são sutis e discretos, como o próprio racismo à brasileira, que o sustentam, o reproduzem e o materializam, trazendo dor, humilhação, crueldade e destruição. Sugere que a raiva pela qual passamos na profissão e os projetos arqueológicos em torno de temas que abordem a presença e o legado dos africanos no Brasil dão base material a afirmações que podem nos ajudar a lutar por representações a partir de nossos lugares de fala.

Toward Decolonizing the Black and White A’nger cloth: Culture, Praxis and Hyphenated Spaces

This paper uses the a’nger cloth, a traditional cloth belonging to the Tiv tribe of Benue, Nigeria as a metaphor for framing autoethnographical narratives and undertakings. Through storying and poetizing about lived experiences, culture, migration tales, identity, gender, marginalization, race and silence, stories emerge as praxis for decolonizing the curriculum. As a non-Western feminist, diasporic academic living in Ottawa, Canada, on unceded Algonquin territory, how might I navigate the changing and uncertain spaces of belonging? Through the a'nger cloth, I find ways of sharing generational family stories through poetry. These stories invite alternative and inclusive spaces into the classroom that welcome “other” ways of being and knowing. Key-words: decolonising the curriculum; narratives; spaces.

Navigating Complex Frontiers: International Business Travellers as Global Boundary Spanners in MNEs

This paper explores how international business travellers (IBTs) enact global boundary spanning roles within multinational enterprises (MNEs). Incorporating a boundary spanning lens, and drawing on...

Navigating Grace in the Lockdown Workplace

Navigating Grace in the Lockdown Workplace

Augmented reality for base plate component placement in reverse total shoulder arthroplasty: a feasibility study

BackgroundAccurate glenoid positioning in reverse total shoulder arthroplasty (RSA) is important to achieve satisfying functional outcome and prosthesis longevity. Optimal component placement can be challenging, especially in severe glenoid deformities. The use of patient-specific instruments (PSI) and 3D computer-assisted optical tracking navigation (NAV) are already established methods to improve surgical precision. Augmented reality technology (AR) promises similar results at low cost and ease of use. With AR, the planned component placement can be superimposed to the surgical situs and shown directly in the operating field using a head mounted display. We introduce a new navigation technique using AR via head mounted display for surgical navigation in this feasibility study, aiming to improve and enhance the surgical planning.Methods3D surface models of ten human scapulae were printed from computed tomography (CT) data of cadaver scapulae. Guidewire positioning of the central back of the glenoid baseplate was planned with a dedicated computer software. A hologram of the planned guidewire with dynamic navigation was then projected onto the 3D-created models of the cadaver shoulders. The registration of the plan to the anatomy was realized by digitizing the glenoid surface and the base of the coracoid with optical tracking using a fiducial marker. After navigated placement of the central guidewires, another CT imaging was recorded, and the 3D model was superimposed with the preoperative planning to analyze the deviation from the planned and executed central guides trajectory and entry point.ResultsThe mean deviation of the ten placed guidewires from the planned trajectory was 2.7° ± 1.3° (95% CI 1.9°; 3.6°). The mean deviation to the planned entry point of the ten placed guidewires measured 2.3 mm ± 1.1 mm (95% CI 1.5 mm; 3.1 mm).ConclusionAR may be a promising new technology for highly precise surgical execution of 3D preoperative planning in RSA.

La producción de una etnografía durante la navegación en un buque de guerra de la Armada Argentina: reflexiones sobre el carácter dialógico del conocimiento antropológico

Fil: Soprano Manzo, German Flavio. Consejo Nacional de Investigaciones Cientificas y Tecnicas; Argentina. Universidad Nacional de Quilmes; Argentina. Universidad Nacional de La Plata; Argentina

Retracted: Difference between Mechanical Alignment in Navigation and Scanogram during Total Knee Arthroplasty.

[This retracts the article DOI: 10.1155/2019/4096306.].

Evaluating the Use of a PRO Questionnaire in Clinical Practice.

Aalborg University Hospital in Farsø uses data from a patient-reported outcome (PRO) questionnaire in order to predict if patients diagnosed with osteoarthritis will benefit from surgery. The purpose of including PRO in the decision-making is to ensure quality and transparency, to include patients in their own treatment, and to make the patients central to both the decision-making and the dialogue. Our evaluation of the use of the PRO questionnaire is based on the observation of patients filling out the questionnaire and interviews with 7 patients and a doctor. We found that there were several usability issues especially for the patients, such as navigation problems and a lack of consistency in the layout of the measurement scales. Furthermore, some questions were difficult for the patients to interpret. The interviewed patients did not report any value from answering the questionnaire. We argue that it may take more than filling out a questionnaire for the patient to feel involved in their own treatment.

Preparing a Health Literate Workforce: The Role of Area Health Education Centers.

Area Health Education Centers (AHEC) play a vital role in creating health literate organizations. In this report, we highlight the work of three AHECs. The Massachusetts AHEC trains oral language healthcare interpreters who can effectively convey complex medical information to patients with limited English proficiency (LEP). The University of Kentucky AHEC trains providers to use the Universal Precautions Health Literacy Toolkit. Finally, the Wisconsin AHEC prepares community health workers (CHWs) to play a vital role in making it easy for people to navigate the healthcare system. These three AHECs serve as models of health literacy's diffusion.

Successfully Navigating Uncharted Waters.

Successfully Navigating Uncharted Waters.

ARDUINO BASED IN-DOOR AUTONOMOUS ROBOT USING BLUETOOTH SENSORS

In door autonomous robots has wide scope in the current world of Industry 4.0. With the advent of low-cost micro controller platforms like Arduino, it is easier to design and deploy inexpensive robotic solutions in Retail environments like physical stores and supply chain nodes like Distribution/Fulfillment centers. The paper discusses a low-cost Arduino based 4 wheeledrobot which can navigate in the given environment with Bluetooth sensors as position nods and obstacle avoidance built-in. Given the diversity and interconnectivity of Bluetooth sensors, we can implement robots moving with centimeter accuracy which is the need in partially closed environments. The robot should navigate its way to the destination which is fed by a remote server with resides on the premise to achieve lowlatency.

“Knowing With”: New Rhodes Board Navigates Collaboration, Intimacy, and Solidarity

“Knowing With”: New Rhodes Board Navigates Collaboration, Intimacy, and Solidarity

Pedagogical foundations to online lectures in health professions education.

Professional and tertiary health professions education (HPE) has been markedly challenged by the current novel coronavirus (COVID-19). Mandates for training organisations to reduce social contact during the global pandemic, and make learning available online, provide an opportunity for regional, rural and remote clinicians and students to more easily access learning and professional development opportunities. Online lectures, while posing an opportunity for regional, rural and remote HPE, entail potential risks. Educators who are familiar with face-to-face pedagogies may find a transition to remote, digital interaction unfamiliar, disarming, and therefore they may not design maximally engaging lectures. The strategies used in a face-to-face lecture cannot be directly transferred into the online environment. This article proposes strategies to ensure the ongoing effectiveness, efficiency and engagement of lectures transitioning from face-to-face to online delivery. Cognitive learning theory, strategies to promote learner engagement and minimise distraction, and examples of software affordances to support active learning during the lecture are proposed. This enables lecturers to navigate the challenges of lecturing in an online environment and plan fruitful online lectures during this disruptive time. These suggestions will therefore enable HPE to better meet the existing and future needs of regional, rural and remote learners who may not be able to easily access face-to-face learning upon the relaxation of social distancing measures. Strategies to provide equitable HPE to learners who cannot access plentiful, fast internet are also discussed.

Cranial facet joint injuries in percutaneous lumbar pedicle screw placement: a matched-pair analysis comparing intraoperative 3D navigation and conventional fluoroscopy

PurposeThe violation of the cranial adjacent facet is a frequent complication in lumbar instrumentations and can induce local pain and adjacent segment disease. Minimally invasive screw implantation is often stated as risk factor in comparison with open approaches. Percutaneous pedicle screw placement (PPSP) can be performed using single X-ray images (fluoroscopy) or intraoperative 3D navigation. The study compares top-level screws in percutaneous lumbar instrumentations regarding facet violations and screw pedicle position using navigation or fluoroscopy.MethodsPatients after lumbar PPSP were retrospectively separated according to the intraoperative technique: navigation (NAV) or fluoroscopy (FLUORO). Two blinded investigators graded the top-level screws regarding facet violations and pedicle breach in postoperative CT scans. Subsequent matched cohort analysis was performed for comparable groups.ResultsEvaluating 768 screws, we assessed 70 (9.1%) facet violations. Overall, 186 (24.2%) screws were implanted using navigation. There was no significant difference in the rate of facet violations between both imaging groups (NAV 19/186, 10.2%, FLUORO 51/582, 8.8%, p = 0.55). Totally, 728 (94.8%) of all screws showed a correct pedicle position. Most of the 40 unfavorable pedicle positions were placed by fluoroscopy (NAV 4/186, 2.2%, FLUORO 36/582, 6.6%, p = 0.03). The matched cohorts verified these results (facet violations: NAV 19/186, 10.2%, FLUORO 18/186, 9.7%, p = 0.55; pedicle penetrations: NAV 4/186, 2.2%, FLUORO 12/186, 6.9%, p = 0.04).ConclusionsBoth intraoperative imaging techniques allow lumbar PPSP with low rates of cranial facet violations if the surgeon intends to preserve facet integrity. Navigation was superior concerning accurate pedicle screw position, but could not significantly prevent facet violations.

Systemic Work of Carers of Community Dwelling Older People with Complex Care Needs: A Qualitative Study of Carers' Experiences

Informal carers provide the majority of direct care to older Australians and play an essential role in assisting older people with complex care needs to remain living in their own homes. With greater emphasis on the community as a more appropriate site for responding to and managing the needs of older people, carers are increasingly faced with systemic responsibilities, including coordination of fragmented services and providers across multifaceted health and aged care systems and negotiation of treatment and supports. Consequently, this work may be perceived by carers as burdensome. The aim of this qualitative study was to explore the lived experiences of carers of community-dwelling older adults in undertaking the systemic work of caring. Specifically, the aim was to explore their experiences of managing and coordinating treatment and supports across multiple services and systems. The concept of Burden of Treatment was used to understand the work of navigating, negotiating and managing care of the older person, how carers made sense of this, and what personal resources they drew on. A descriptive phenomenological approach was taken to guide the research. Semi-structured interviews were conducted with 16 carers of community-dwelling older adults with complex care needs. Giorgi’s phenomenological data analysis methods (1997) was utilised for the data analysis. Two main themes were derived from the analysis, each comprising three sub-themes. The first theme, Becoming part of the caring system, comprised: (a) Entering the caring system, (b) A sense of obligation and duty, and (c) Work at the nexus of present and future. The second major theme, Mastering the caring system, comprised: (a) Making connections, (b) Activating the management plan, and (c) Voicing and advocating needs in the caring system. Participants felt a sense of expectation and responsibility from others, including family and health and aged care providers to take on the caring work. Many perceived they had no alternative but to respond to systemic demands when seeking to manage the needs of the older person and described the challenge of this work as managing multiple and complex organisational and administrative processes across different systems while locating, accessing and coordinating services for the older person. The findings showed an experience of being adrift and having to piece together disjointed pathways. Participants also described the work of trying to make systems more responsive to the older person for a better outcome. Furthermore, the findings illustrated the varied skills required to master the systemic work, including administrative, communication, advocacy, problem-solving and negotiation abilities. Some carers drew on personal resources, robustness and abilities while others often felt overwhelmed and unsure of how to proceed. The findings indicate that through addressing the systemic work placed on carers, the burden placed on them can be alleviated. From a system perspective, streamlining and reducing duplication of assessments, improving information access, improving communication and targeting partnerships between differing organisations can reduce system complexity which in turn will reduce the demands made on carers. Consideration of models of system navigation, care co-ordination, and case management would support those who struggle to independently master the system. The findings also suggest that there is scope for health care professionals and service providers to better identify carer requirements and assess carer capacity to manage the work. Without investment to assist carers to do the increasingly complex work, there is a risk of disparity between those that are equipped to access services and supports and those that will that continue to flounder and forego appropriate care for the older person and support for themselves.