Optics and Vision

2018 ◽  
pp. 480-518
Author(s):  
Colin Webster
Keyword(s):  
Visual Perception ◽  
Color Image ◽  
Holistic Approach ◽  
Geometrical Optics ◽  
Night Vision ◽  
Hellenistic Period ◽  
Image Transfer ◽  
Optical Illusions ◽  
Over Time

The chapter surveys the scope of ancient optics, which varied over time and between authors. No two authors in antiquity agree on precisely which elements should be included in a useful and credible account of visual perception. The chapter adopts a holistic approach that pays attention to how each author functionally defines sight. By the time of Plato, a relatively consistent set of phenomena defined sight, including color, image transfer, reflection, and night vision. Aristotle incorporated sight within a broader metaphysical account of perception and the soul, while the Epicureans fixated on the epistemological consequences of optical illusions. In the Hellenistic period, geometrical optics (and its sibling discipline catoptrics, the study of mirrors) rose to greater prominence, utilizing diagrams to explain and model vision. Ptolemy composed a treatise that systematized and synthesized both the geometrical and philosophical approaches to sight.

Legume production at Cyrene in the Hellenistic period: epigraphic evidence

2018 ◽  
Vol 49 ◽  
pp. 159-169
Author(s):  
Muna H. Haroun Abdelhamed
Keyword(s):  
General Trend ◽  
Production Capacity ◽  
Hellenistic Period ◽  
Human Diet ◽  
Regional Production ◽  
Legume Production ◽  
The Cost ◽  
Epigraphic Evidence ◽  
Over Time

AbstractLegumes seem to have been cultivated and to have formed an essential part of the human diet during the Greek and Roman periods. This paper examines the cultivation of pulses in Cyrenaica during the Hellenistic era. It considers the regional production capacity for legumes to meet local needs and argues the involvement of different kinds of pulses in interregional commerce alongside cereals and other dry grains. This study has been implemented via investigating Hellenistic epigraphic evidence from Cyrene. It has traced the cost of pulses mentioned in inscriptions of the fourth and third/second centuries BC and compared them with that of wheat and barley. Pulses and cereal costs indicated by Diocletian's ‘Edict on Maximum Prices of AD 301’ have also been investigated to assess the general trend of their prices over time. The examination demonstrates that varieties of pulses were produced in Cyrenaica during the Hellenistic era and were likely as significant as wheat and barley. It also indicates that they were probably traded from the region alongside other dry commodities.

scholarly journals THE GUEST’S PREFERENCES OF THREE-STAR HOTEL ROOMS BASED ON VISUAL AND PHYSICAL PERCEPTION

2019 ◽  
Vol 4 (2) ◽  
pp. 60
Author(s):  
Nadya Nilafianty Prasetya ◽  
Maria Immaculata Ririk Winandari
Keyword(s):  
Visual Perception ◽  
Interior Design ◽  
Mixed Method ◽  
Tourism Industry ◽  
Central Bureau ◽  
Occupancy Rate ◽  
Factors Affecting ◽  
Wall Element ◽  
Over Time ◽  
Research Show

ABSTRACT The development of the tourism industry in Indonesia needs to be supported by appropriate facilities and infrastructure. Hotel as one of the supporting tourism in Indonesia has to be properly expanded. According to the data from Central Bureau of Statistics (BPS), the occupancy rate of star-rated hotels continues to increase over time. One of the factors affecting the customer's decision in choosing a hotel is its interior design. Interior elements consist of floor, wall, ceiling, and furniture. The wall element is one of the interior elements that are attractive to visitors. To find out the perception of hotel visitors, the author surveyed five three-star hotels in Jakarta. The five hotels are Maxone hotel in Matraman, Yellow Hotel in Harmoni, Lynt Hotel in Gambir, Park 5 Hotel and Swissbellinn both are located in Simatupang. The method used in this study is a mixed-method with a visual perception approach in the form of direct interviews and distributed questionnaires to 40 respondents. The results of the research show that several wall criteria of the hotel that are suitable for visitors among others are: bright wall colors and walls with soothing color schemes. Keywords: Guest’s preferences, hotel rooms, visual perception, wall design

Supplier management by distributing orders among new and existing suppliers: the methodology and its application to a fast fashion company

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Betul Acar Alagoz ◽  
Murat Caner Testik ◽  
Derya Dinler
Keyword(s):  
Performance Evaluation ◽  
Business Processes ◽  
Low Cost ◽  
Moving Average ◽  
Holistic Approach ◽  
Supplier Management ◽  
Business Environment ◽  
Content Type ◽  
A Company ◽  
Over Time

PurposeThis study aims to create a reliable, collaborative and sustainable business environment with suppliers of a company for providing high-quality and low-cost products on time. A supplier management system that sustains existing suppliers by sharing work based on systematic performance evaluation while developing the supplier base with potential suppliers is proposed.Design/methodology/approachBuilt on quantitative approaches, supplier management functions are integrated in the designed system. A quantitative strengths, weaknesses, opportunities and threats (SWOT) analysis is adapted for evaluating potential suppliers. A multi-objective integer linear programming (ILP) model is developed for the distribution of orders among selected potential and existing suppliers. A performance evaluation scheme based on an exponentially weighted moving average (EWMA) is proposed to evaluate and monitor suppliers' performance over time.FindingsProposed system develops a supplier base by methodically selecting and approving new suppliers, and a sustainable relationship with both new and existing suppliers is established based on performance over time. Decisions on retaining or removing suppliers from the base are objectively made by quantitative evaluations. Orders are fairly distributed among suppliers under the constraints imposed by the management. Dependence on a certain set of suppliers and its associated risks are reduced while agility in offering goods is enabled.Originality/valueBusiness processes for selecting new suppliers, distributing orders among all suppliers, evaluating and monitoring performance over time are quantitatively integrated to add value in operational decision-making. The proposed system is original in the holistic approach for managing and sustaining multiple suppliers of a company based on performance.

Trying to Go Open

2017 ◽  
pp. 222-250
Author(s):  
Özgün Imre
Keyword(s):  
Knowledge Management ◽  
Open Source ◽  
Management System ◽  
Holistic Approach ◽  
Editorial Team ◽  
Academic Journal ◽  
Study Approach ◽  
Source Journal ◽  
Over Time

Theoretically, open source solutions are a good match with the resource scarce organization such as a young academic journal to make the publication process and the knowledge shared explicit to the participants in the system. This paper uses a case study approach to investigate how the decision to have such a system depends on a myriad of factors, and tracks how the editorial team decided to adopt an open source journal management system for their knowledge management issues. The study argues that these components should not be taken in isolation by showing how the previous decisions can become a hindrance as these components change over time. The results show that some factors, though initially thought to be unimportant, can become major forces as the journal matures, and a more holistic approach could help to side-step the problems faced.

Visual perception: An event over time.

1957 ◽  
Vol 64 (5) ◽  
pp. 306-313 ◽  
Author(s):  
Gudmund Smith
Keyword(s):  
Visual Perception ◽  
Over Time

scholarly journals Hierarchical Visual Perception and Two-Dimensional Compressive Sensing for Effective Content-Based Color Image Retrieval

2016 ◽  
Vol 8 (5) ◽  
pp. 877-889 ◽  
Author(s):  
Yan Zhou ◽  
Fan-Zhi Zeng ◽  
Hui-min Zhao ◽  
Paul Murray ◽  
Jinchang Ren
Keyword(s):  
Visual Perception ◽  
Image Retrieval ◽  
Compressive Sensing ◽  
Color Image ◽  
Two Dimensional

Mentoring and Coaching

2017 ◽  
Author(s):  
Fariyal Ross-Sheriff ◽  
Julie Orme
Keyword(s):  
Social Work ◽  
Holistic Approach ◽  
People Of Color ◽  
Mentoring Relationships ◽  
Next Generation ◽  
Theoretical Frameworks ◽  
Traditional Concept ◽  
Social Work Educators ◽  
Practice Recommendations ◽  
Over Time

This article provides a synopsis of mentoring and coaching, with a focus on the importance of mentoring in academia. Although there are considerable differences between mentoring and coaching, both of these processes share similar goals and foundational elements. Over time, the traditional concept of mentoring has evolved to become more relational in nature. Scholars have noted the benefits of this contemporary type of relational mentoring, as well as the challenges of mentoring with select populations (i.e., women and people of color) who have historically experienced barriers to receiving appropriate mentorship. Theoretical frameworks and practice recommendations are presented for understanding and developing mentoring relationships. By using a relational and holistic approach to mentoring, social work educators and practitioners can help to advance the next generation of leadership within the profession.

Psychotherapist/Dramatherapist, 10 years’ experience, Greece

2020 ◽  
pp. 118-120
Author(s):  
Markus Reuber ◽  
Gregg H. Rawlings ◽  
Steven C. Schachter
Keyword(s):  
Epileptic Seizures ◽  
Holistic Approach ◽  
Conversion Disorder ◽  
Eeg Monitoring ◽  
Psychological Method ◽  
The Mind ◽  
First Time ◽  
Video Eeg ◽  
Over Time

This chapter describes the experience of a Psychotherapist/Dramatherapist when working in a Neuropsychiatry department. It was there that the Psychotherapist met patients with Conversion Disorder for the first time and worked with them and others who were undergoing video-EEG monitoring for unexplained attacks, fits, or seizures. These experiences, among many others, have gradually led the Psychotherapist to create “Metamyth,” a psychological method uniquely suitable for the treatment of people with epilepsy. Metamyth for people with Non-Epileptic Seizures (NES) adopts a different approach to that used with epilepsy. As a holistic approach, Metamyth is interested in the mind, body, soul and intuition, and communication. Considerable patience is needed to understand the complexity of each patient with NES and for the diagnosis to reveal itself over time.

Speed and Eccentricity Tuning Reveal a Central Role for the Velocity-Based Cue to 3D Visual Motion

2010 ◽  
Vol 104 (5) ◽  
pp. 2886-2899 ◽  
Author(s):  
Thaddeus B. Czuba ◽  
Bas Rokers ◽  
Alexander C. Huk ◽  
Lawrence K. Cormack
Keyword(s):  
Visual Perception ◽  
Moving Objects ◽  
Visual Motion ◽  
Three Dimensional ◽  
Building Blocks ◽  
3D Motion ◽  
Direction Discrimination ◽  
Retinal Motion ◽  
Wide Range ◽  
Over Time

Two binocular cues are thought to underlie the visual perception of three-dimensional (3D) motion: a disparity-based cue, which relies on changes in disparity over time, and a velocity-based cue, which relies on interocular velocity differences. The respective building blocks of these cues, instantaneous disparity and retinal motion, exhibit very distinct spatial and temporal signatures. Although these two cues are synchronous in naturally moving objects, disparity-based and velocity-based mechanisms can be dissociated experimentally. We therefore investigated how the relative contributions of these two cues change across a range of viewing conditions. We measured direction-discrimination sensitivity for motion though depth across a wide range of eccentricities and speeds for disparity-based stimuli, velocity-based stimuli, and “full cue” stimuli containing both changing disparities and interocular velocity differences. Surprisingly, the pattern of sensitivity for velocity-based stimuli was nearly identical to that for full cue stimuli across the entire extent of the measured spatiotemporal surface and both were clearly distinct from those for the disparity-based stimuli. These results suggest that for direction discrimination outside the fovea, 3D motion perception primarily relies on the velocity-based cue with little, if any, contribution from the disparity-based cue.

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