Zeitschriftenartikel zum Thema „Obtrusive light“

Abstract The use of municipal football fields by a large number of citizens and amateur athletes on a daily basis during evenings is a popular activity. Usually, the aiming of the pitch lighting, without taking into account the dense urban environment in the surroundings, causes light pollution. Obtrusive lighting in most cases is the rule and not the exception. This situation could be justified in football fields of the professional football leagues so as to address the needs of television broadcasts of the matches for two days per month per field. However, in amateur activities due to the lack of rules and the initial incorrect lighting design, the problem of light pollution is deteriorated. The scope of this research is to identify the main issue and the repercussions of obtrusive lighting in the urban fabric, propose a quick method to quantify light pollution in sport fields using IDA-Criteria for Community-Friendly Outdoor Sports Lighting guidelines and to further set some parameters for a method using more calculating surfaces.

Monitoring people's health is useful for enhancing the care provided to them by others or self-management of health. This article is a survey of the latest research on monitoring parameters indicating a person's current health or having potential to affect the person's health in future, using various physical sensors. These sensors include accelerometers, gyroscopes, electromyography sensors, fiber optic sensors, textile electrodes, thermistors, infrared sensors, force sensors, and photo diodes. The health parameters monitored include heart rate, respiration rate, weight, body mass index, calories burnt, pressure distribution, diet, blood pressure, blood glucose, oxygen saturation, posture, duration of sleep, quality of sleep, hand movement, body temperature, skin conductance, exposure to ultraviolet light, adherence to medication-intake schedule, gait characteristics, and steps taken. The population monitored includes elderly people, miners, stroke survivors, osteoarthritis patients, people suffering from anorexia nervosa, obese people, people with Parkinson's disease, people having panic attacks, and wheelchair users.

Division 5 of the CIE deals with the subject of “Exterior and other Lighting Applications” and has since 1991 had a Technical Committee (TC5.12) working on a “Guide on the limitation of the effects of obtrusive light from outdoor lighting installations”. This Committee did much of its work under the chairmanship of Dr. Alec Fisher of Australia, who has now retired and passed on the work to the current author. The present report outlines the content of the proposed Guide and details its relevance to help preserve the astronomical sky. It also highlights the close links with CIE Committee TC4.21, which works directly on the problems of sky glow.

This paper describes the use of a new obtrusive light module of the Illumina v2 model to estimate the light that may enter bedroom windows. We used the following as input to the model: (1) the sources’ flux and spectrum derived from the color images taken by astronauts from the International Space Station (ISS), (2) an association between source spectrum and angular emission, and (3) a per zone inventory of obstacles properties and lamp height. The model calculates the spectral irradiance incident to buildings’ windows taking into account the orientation of the street. By using the color information from an ISS image, we can classify pixels as a function of their spectra. With the same image, it is also possible to determine the upward photopic radiance for each pixel. Both serve as inputs to the model to calculate the spectral irradiance on any window. By having the spectral irradiance, it is possible to determine the Melatonin Suppression Index and the photopic irradiance on the window. Such information can later be used to perform epidemiological studies. The new methodology is applied to the city of Montréal in Canada for a set of houses’ locations. The computations are made for 2013 (pre-LED era).

We led an investigation to decide if hypo fractionated 35-days timetable of entire breast radiation is pretty much as viable. Women who bearing obtrusive breast carcinoma had gone through breast monitoring a medical procedure and resection edges were clean and partially lymph hubs were negatively approached with haphazardly relegated to get entire bosom illumination either at a control portion of 50 Gy in 15 divisions over a time of 45 days or at a portion of 45.5 Gy in 12 parts over a time of 22 days (the hypo fractionated-radiation bunch). The repetition at 36 months were 7.2% among the 301 ladies allocated to standard illumination as contrasted and 7.6% among the 312 ladies allocated to the hypo fractionated routine. At 36 months, 69.5% of ladies in the benchmark group as contrasted and 71.2% of the ladies in the hypo fractionated-radiation bunch had a decent or astounding restorative result. 3 years after therapy, sped up, hypo fractionated entire breast illumination was not sub-par compared to standard radiation therapy in ladies who had gone through breast preserving a medical procedure for obtrusive bosom malignant growth with clear careful edges what's more, negative axillary hubs. The ideal fractionation plan for entire bosom light after bosom rationing medical procedure is obscure.

Muslims has differentiated between new moon and Islamic new moon (hilal). The determination of first day of months based on visibility of Islamic new moon (hilal) i.e. sightings of the first sliver of the waxing moon marking the start of each month. One major issue that has affected hilal visibility for many years is misdirected, excessive and obtrusive artificial light. The objective of this research is to study the impact of light pollution on the visibility of hilal. The data were taken using Sky Quality Meter (SQM) which records the visual magnitudes per square arcsecond (mpsas) to measure sky limiting magnitude. Result showed that reading between 16-22 mpsas, the chances to witness hilal is high. Any lower than 16mpsas, the hilal is not visible. The main result of this research is to find out a vital parameter of hilal observations which leads to propose a new criterion i.e. sky limiting magnitude.

In light of our aging population, there is an immediate need for non-obtrusive, continuous, and ubiquitous health monitoring technologies that will enable our population to age with a higher quality of life and independence. Research has demonstrated that gait indicators, such as walking speed, can reflect cognitive and physical functioning. However, gradual changes in such indicators usually go undetected until critical problems arise; being able to detect changes in indicators, such as gait deterioration, of older adults while in their home environments would enable clinicians to tailor more effective and personalized interventions by better understanding user behaviour in real-world settings. Real-world data is essential to enabling our healthcare system to act where patients most need help and to optimize the effect of designed eHealth solutions.

Lighting advertising signs not only play an important role in outdoor lighting environment in Taiwan, but also become the main factor of energy consumption in urban areas at night. Light-emitting diode (LED) has been gradually used in advertising signs due to its advantages. However, in order to be conspicuous and legible in the daytime, signs that are excessively bright may result in considerable light pollution and energy waste at nighttime. Therefore, this research aims to measure the luminance of LED signs and traditional internally lighted signs, and analyze the light trespass from each signage. Based on the research results, the energy consumption from a LED full color screen is 12 times more than a traditional internally lighted sign per day. Statistically, all kinds of LED signs are much higher than traditional internally lighted signs in the percentage of excessive brightness and average luminance value. As for the light trespass, since the vertical illuminance on facade facing the signs increases with the increase of the sign area or the decrease of the distance between the sign and the facade, the vertical illuminance on facade facing the signs would exceed the limit of CIE even if the luminance of the signs achieves the standard of CIE in terms of the general conditions in Taiwan. This happens to LED full color screens in particular and thus results in considerable obtrusive light. To sum up, in order to reduce unnecessary energy consumption and improve the nighttime lighting quality for outdoor environment, this research recommends the luminance limitation for light dimming of LED advertising signs should refer to the zoning, time period, and sign area.

Road lighting uniformity is an essential lighting quality parameter for motorists and pedestrians and varies with lighting design parameters. Increased road lighting uniformity may result in benefits, such as increased reassurance and perceived safety for pedestrians or an increased overall visual perception. However, no previous study has investigated how road lighting uniformity varies with lighting design scenarios or how the uniformity of various lighting design scenarios affects other essential parameters, such as energy performance and obtrusive light. This study aimed to investigate: (I) how uniformity varies with different road lighting design scenarios, and (II) how uniformity correlates with energy performance and risk for increasing spill light. The study is limited to pedestrian roads. We performed photometric calculations in ReluxDesktop for more than 1.5 million cases with single-sided pole arrangements and for various geometries of road width, pole distance, pole height, overhang, and luminaire tilt. The results were analyzed with a set of five relevant metrics that were calculated and analyzed together with uniformity. For the evaluation, we used the minimum luminaire power needed to achieve an average illuminance of 10 lx, the power density indicator (DP), edge illuminance ratio (REI), and we introduced two new indicators for spill light on the ground in the border areas: the extended edge illuminance ratio (extended REI) and the spill flux ratio (RSF). The results show that increased uniformity levels may significantly increase energy consumption and spill light, but that both these impacts can be relatively controlled if uniformity is kept under certain limits. The investigated cases also demonstrated that improper lighting planning significantly increases adverse effects, such as spill light.

Anorexia nervosa (AN) is associated with a wide range of disturbances of the autonomic nervous system. The aim of the present study was to monitor the heart rate (HR) and the heart rate variability (HRV) during light physical activity in a group of adolescent girls with AN and in age-matched controls using a wearable, minimally obtrusive device. For the study, we enrolled a sample of 23 adolescents with AN and 17 controls. After performing a 12-lead electrocardiogram and echocardiography, we used a wearable device to record a one-lead electrocardiogram for 5 min at baseline for 5 min during light physical exercise (Task) and for 5 min during recovery. From the recording, we extracted HR and HRV indices. Among subjects with AN, the HR increased at task and decreased at recovery, whereas among controls it did not change between the test phases. HRV features showed a different trend between the two groups, with an increased low-to-high frequency ratio (LF/HF) in the AN group due to increased LF and decreased HF, differently from controls that, otherwise, slightly increased their standard deviation of NN intervals (SDNN) and the root mean square of successive differences (RMSSD). The response in the AN group during the task as compared to that of healthy adolescents suggests a possible sympathetic activation or parasympathetic withdrawal, differently from controls. This result could be related to the low energy availability associated to the excessive loss of fat and lean mass in subjects with AN, that could drive to autonomic imbalance even during light physical activity.

Optimization of lighting installations should be a priority in order to reduce energy consumption and obtrusive light while providing optimal visibility conditions for road users. For the design of lighting installations, it is assumed that the road has homogeneous photometric characteristics and only one viewing angle is used. There are often significant differences between the design of lighting installations and their actual performance. In order to examine whether these differences are due to the photometry of the road, this study proposes metrics to assess the influence of road heterogeneity and observation angle. These metrics have been used on many measurements conducted on site and in the laboratory for different pavements. A calculation engine has been developed to realize road lighting design with several r-tables in the same calculation or for different observation angles. Thus, this study shows that a root mean squared deviation (RMSD) calculation, including average luminance and uniformities associated with different r-tables, is directly correlated to a normalized root mean squared deviation (NRMSD) calculation between these r-tables. With these proposed metrics it is possible to optimize lighting installation while taking into account different types of urban surfaces and the diversity of users.

Input methods for interaction in smartphone-based virtual and mixed reality (VR/MR) are currently based on uncomfortable head tracking controlling a pointer on the screen. User fixations are a fast and natural input method for VR/MR interaction. Previously, eye tracking in mobile VR suffered from low accuracy, long processing time, and the need for hardware add-ons such as anti-reflective lens coating and infrared emitters. We present an innovative mobile VR eye tracking methodology utilizing only the eye images from the front-facing (selfie) camera through the headset’s lens, without any modifications. Our system first enhances the low-contrast, poorly lit eye images by applying a pipeline of customised low-level image enhancements suppressing obtrusive lens reflections. We then propose an iris region-of-interest detection algorithm that is run only once. This increases the iris tracking speed by reducing the iris search space in mobile devices. We iteratively fit a customised geometric model to the iris to refine its coordinates. We display a thin bezel of light at the top edge of the screen for constant illumination. A confidence metric calculates the probability of successful iris detection. Calibration and linear gaze mapping between the estimated iris centroid and physical pixels on the screen results in low latency, real-time iris tracking. A formal study confirmed that our system’s accuracy is similar to eye trackers in commercial VR headsets in the central part of the headset’s field-of-view. In a VR game, gaze-driven user completion time was as fast as with head-tracked interaction, without the need for consecutive head motions. In a VR panorama viewer, users could successfully switch between panoramas using gaze.

Abstract Background Wearable technology is a fast developing area. Often, the focus of research is on accuracy, while the practicalities of using the device may be overlooked, despite the fact that this greatly influences utility. This scoping review therefore explored the design and usability preferences of people for wearable technology for health monitoring. Methods A scoping review was conducted of literature evaluating user preferences for the design of wearable technology systems, for people aged >50 years, with good health, or chronic diseases. Results A search of relevant databases yielded 628 potential studies (after duplicates removed). Following title/abstract and then full text screening, 17 papers were included. The most commonly reported theme related to design and user interface (13 studies). Users wanted a small, unobtrusive and light device which doesn’t snag on clothing or affect activities of daily living, but yet has a readable and easy-to-use interface, which may prove challenging for designers! Users were most happy to wear a device on the wrist and/or hip region, being considered the least obtrusive / most discrete. Users were open to the technology aspects of the device, but wanted specific training, or clear and readable instructions. Less commonly reported parameters included issues with privacy and ownership of data (two studies); cost (two studies); reliability and accuracy (three studies), including being accurate overnight and in the shower, etc.; and clinical usefulness, i.e. the data being effectively linked with other healthcare data. Where considered, participants didn’t want to wear a device by night (two studies). Safety of wearable devices was not a theme in any study. Conclusion Overall, user needs seem to be rarely considered in the design of wearable technology for health monitoring. However, the limited studies do highlight important user concerns, which should be considered by the technology designers and prescribers.

Abstract Introduction Individuals with insomnia report poor sleep quality and non-restorative sleep, and often exhibit irregular sleep patterns over days and weeks. First night effects and logistical challenges make it difficult to measure these sleep characteristics in the laboratory. Also, sensitivity to sleep disruption from obtrusive measurement devices confounds sleep measurements in people with insomnia in their naturalistic setting. Non-contact sleep measurement devices have the potential to address these issues and enable ecologically valid, longitudinal characterization of sleep in individuals with insomnia. Here we use a non-contact device – the SleepScore Max (SleepScore Labs) – to assess the sleep of individuals with chronic insomnia, compared to healthy sleeper controls, in their home setting. Methods As part of a larger study, 13 individuals with chronic insomnia (ages 25-60y, 7 males) and 8 healthy sleeper controls (ages 21-46y, 6 females) participated in an at-home sleep monitoring study. Enrollment criteria included an age range of 18-65y and, for the insomnia group, ICSD-3 criteria for chronic insomnia with no other clinically relevant illness. Participants used the non-contact sleep measurement device to record their sleep periods each night for 8 weeks. Sleep measurements were analyzed for group differences in both means (characterizing sleep overall) and within-subject standard deviations (characterizing sleep variability across nights), using mixed-effects regression controlling for systematic between-subject differences. Results Based on the non-contact sleep measurements, individuals with chronic insomnia exhibited greater variability in bedtime, time in bed, total sleep time, sleep latency, total wake time across time in bed, wakefulness after sleep onset, sleep interruptions, and estimated light sleep, compared to healthy sleeper controls (all F>5.7, P<0.05). No significant differences were found for group averages and for variability in estimated deep and REM sleep. Conclusion In this group of individuals with chronic insomnia, a non-contact device used to characterize sleep naturalistically captured enhanced variability across nights in multiple aspects of sleep stereotypical of sleep disturbances in chronic insomnia, differentiating the sample statistically significantly from healthy sleeper controls. Support (if any) NIH grant KL2TR002317; research devices provided by SleepScore Labs.

Background Sleep influences moods and mood disorders. Existing methods for tracking the quality of people’s sleep are laborious and obtrusive. If a method were available that would allow effortless and unobtrusive tracking of sleep quality, it would mark a significant step toward obtaining sleep data for research and clinical applications. Objective Our goal was to evaluate the potential of mobile sensing data to obtain information about a person’s sleep quality. For this purpose, we investigated to what extent various automatically gathered mobile sensing features are capable of predicting (1) subjective sleep quality (SSQ), (2) negative affect (NA), and (3) depression; these variables are associated with objective sleep quality. Through a multiverse analysis, we examined how the predictive quality varied as a function of the selected sensor, the extracted feature, various preprocessing options, and the statistical prediction model. Methods We used data from a 2-week trial where we collected mobile sensing and experience sampling data from an initial sample of 60 participants. After data cleaning and removing participants with poor compliance, we retained 50 participants. Mobile sensing data involved the accelerometer, charging status, light sensor, physical activity, screen activity, and Wi-Fi status. Instructions were given to participants to keep their smartphone charged and connected to Wi-Fi at night. We constructed 1 model for every combination of multiverse parameters to evaluate their effects on each of the outcome variables. We evaluated the statistical models by applying them to training, validation, and test sets to prevent overfitting. Results Most models (on either of the outcome variables) were not informative on the validation set (ie, predicted R2≤0). However, our best models achieved R2 values of 0.658, 0.779, and 0.074 for SSQ, NA, and depression, respectively on the training set and R2 values of 0.348, 0.103, and 0.025, respectively on the test set. Conclusions The approach demonstrated in this paper has shown that different choices (eg, preprocessing choices, various statistical models, different features) lead to vastly different results that are bad and relatively good as well. Nevertheless, there were some promising results, particularly for SSQ, which warrant further research on this topic.

Abstract Introduction Individuals with insomnia report poor sleep quality and non-restorative sleep, and often exhibit irregular sleep patterns over time. First night effects and logistical challenges make it difficult to accurately measure these sleep characteristics in the laboratory. Also, sensitivity to sleep disruption from obtrusive devices confounds sleep measurements in people with insomnia in their naturalistic setting. Non-contact devices (NCDs) may address these issues and enable ecologically valid, longitudinal and unobtrusive characterization of sleep in individuals with insomnia. We present results from a NCD, previously validated against polysomnography, – SleepScore Max (SleepScore Labs) – assessing the sleep of individuals with chronic insomnia, compared to healthy sleeper controls, in their home setting. Methods A total of 112 individuals participated in an at-home sleep monitoring study including 83 with chronic insomnia (ages 19-65, 58 females) and 29 healthy sleeper controls (ages 19-54, 21 females). Enrollment criteria included being 18-65 years of age and, for the insomnia group, meeting International Classification of Sleep Disorders (3rd edition; ICSD-3) criteria for chronic insomnia with no other clinically relevant condition contributing to sleep disturbance. Participants used the NCD to record their sleep periods each night for 8 weeks. Sleep measurements were analyzed for group differences in both means (characterizing sleep overall) and within-subject standard deviations (characterizing night-to-night sleep variability), using mixed-effects regression controlling for systematic between-subject differences. Results On average, individuals with chronic insomnia exhibited increased total wake time, wake after sleep onset, and decreased sleep efficiency relative to healthy sleeper controls (F>6.8, p<0.01). Additionally, they demonstrated greater night-to-night variability in time in bed, total sleep time, sleep latency, total wake time, wakefulness after sleep onset, sleep interruptions, sleep efficiency, and light and deep sleep (F>4.4, p<0.05). Conclusion In our sample of individuals with chronic insomnia, a NCD naturalistically detected differences from healthy sleeper controls in multiple sleep parameters, both on average and in terms of night-to-night variability. Capturing night-to-night variability in the home setting adds an important dimension to our understanding of poor sleep and provides a more comprehensive, ecologically valid characterization of chronic insomnia as experienced in daily life. Support (If Any) NIH grant KL2TR002317; research devices provided by SleepScore Labs

Purpose With the increasing instances of malfeasance and frauds coming to light in the financial services industry, trust has become a key concern for customers. Fortunately, in the case of Islamic Finance, trust is a central tenet, and its importance can be seen through the emphasis of Amanah or trustworthiness that should be present in every financial transaction. However, it has been argued that the principle of trust has not been truly realized in Islamic Finance, or that there are still issues of distrust regarding anything which is obtrusively branded as “Islamic”. In this paper, the author will analyze the reasons for gaps between the expectations and reality of the finance industry today by looking at the main factors contributing to distrust among the different stakeholders and the perceived impact of the distrust on the industry and the general public. It then focuses on the past and ongoing efforts by academia to bridge these gaps between the different stake holder groups with the help of illustrative case studies as well as recommends future steps to be taken to ensure a stronger foundation of trust within the Islamic Finance community.

Illumination is crucial in human activities and in machine vision applications. For indoor surveillance applications, Infrared (IR) Light Emitting Diodes (LEDs) are the common means of providing illumination to the camera to cause no discomfort to human occupants. While IR provides non-obtrusive illumination for the camera, the same energy consumed does not provide the illumination to indoor spaces of the building. This is important if the premises where the camera is installed is not connected to the main power source or electric grid but derives energy from renewable sources. In this work, an illumination controller based on fuzzy logic system is developed and integrated to a vision system and an LED lighting system to provide a constant level of illumination to an object regardless of its distance from the image sensor. The computer vision system performs human object detection and face recognition and outputs fuzzy values representing the inferred distance of detected objects where the fuzzy system generates crisp output of duty cycle settings for the PWM controller for the LED lighting system to provide the required illumination needed by the vision system. Optimum illumination level for the vision system to perform the detection, tracking and face recognition operations must be provided by the system. Using visible Light Emitting Diodes as source of illumination, the system provides illumination both for the proper operation of the camera and human personnel monitoring the premises where the system is installed. This feature is significant in energy-constrained surveillance applications or where there is no power source derived from the electric grid.

At present, the need for crops in fertilizers is determined by an amount of mineral nutrients carried out by the planned crop and by the results of field experiment, taking into account the effective fertility of the soil. Experimental studies were conducted on the eroded slope of steepness 6–7° on the basis of the Rivne Institute of Agricultural Production of the National Academy of Sciences of Ukraine. The soil of the experimental site is dark gray, light-sand, medium-grained, extracted. In order to create cereal-leguminous grass, haymaking, the grass-blend was planted in a non-obtrusive manner, the following grasses were added to the composition: alfalfa sowed (4.4 million pounds per hectare) + long beetroot horned (4.4 million pounds per hectare) + bromus inermis (3.4 million pounds per hectare) + Lolium perenne (3.4 million pounds per hectare). The experiment used double and triple combinations of mineral fertilizers in accordance with the scheme and used growth stimulants (emistom C and fumar). Nitrogen fertilizers were administered in the dose N30 in the spring and after the second slump. Phosphoric and potassium – in the spring. Results of our analysis show that the removal of nutrients and their content in the root remains more depend on the harvest of dry overground mass and accumulation of root residues, than from the chemical composition of cereals and legumes grass mix. In variants where mineral nitrogen was not introduced, the accumulation of this element in the crop occurs at the expense of growth stimulator (fumar) and the symbiotic fixation of nitrogen by bean grasses. We have established that the removal of nitrogen with the harvest was 162.4–240.0 kg/ha, phosphorus 46.5–66.7 kg/ha, potassium – 184.8–240.0 kg/ha. The highest yield was from nitrogen, phosphorus and potassium in variants with full mineral fertilizer in the norm N60P60K90 + growth stimulator fumar and was 240.0 kg/ha, 66.7 kg/ha, 240.0 kg/ha respectively. The results are presented, which confirm that at a low level of mineral nutrition a significant amount of nutrients is removed by the harvest. According to our calculations, a positive balance between nitrogen and phosphorus and negative for potassium was noted on variants of cereal-leguminous grasses of hayfield use (Medicago sativa alfalfa crop, Lotus corniculatus lyadvenets Horned, Promus rump beardless inermis, and Lolium multiflorum) with full mineral fertilizers in a dose of N60P60K90 + fumar. It was established that cereal grasses use nitrogen in the ear staining phase, and fertilizer and root residues are not sufficient to cover its removal with a biological harvest.

Abstract Social scientists have long been interested in how religious beliefs and practices impact and are impacted by socio-political and economic processes. Most recently, scholarly attention has focused on the interplay between religiosity and local actors, events, and institutions. Until now, measures of religiosity have relied heavily on self-reports in surveys, but these cannot always be safely collected and tend to be costly. Even where available, survey-based measures may be too obtrusive and are rarely representative of sub-national units. Here, I propose an inexpensive method that uses satellite imagery to unobtrusively estimate religiosity across small geographic units. I hypothesize that night-lights are affected by the behavior of fasting Muslims during Ramadan, especially in places where daytime activities are otherwise unchanged (i.e., where there is no “day-night inversion”). I explore and confirm the validity of this measurement strategy in the Turkish case, using a series of high-quality surveys and electoral results, representing 973 administrative districts. I conclude with a discussion of the external validity of this method and an overview of the ethical concerns raised by the use of remote sensing to estimate religiosity, in the Muslim world and elsewhere.

Machines that fit the human environment instead of forcing humans to enter theirs will make using a computer as refreshing as taking a walk in the woods. Mark Weiser on ubiquitous computing (21st Century Computer 104) In 2007, a forum entitled HCI 2020: Human Values in a Digital Age sought to address the questions: What will our world be like in 2020? Digital technologies will continue to proliferate, enabling ever more ways of changing how we live. But will such developments improve the quality of life, empower us, and make us feel safer, happier and more connected? Or will living with technology make it more tiresome, frustrating, angst-ridden, and security-driven? What will it mean to be human when everything we do is supported or augmented by technology? (Harper et al. 10) The forum came as a response to, what many call, post-PC technological developments; developments that seek to engulf our lives in digital technologies which in their various forms are meant to support and augment our everyday lives. One of these developments has been the project of ubiquitous computing along with its kin project, tangible computing. Ubiquitous computing (ubicomp) made its appearance in the late 1980s in the labs of Xerox’s Palo Alto Research Center (PARC) as the “third wave” in computing, following those of the mainframe and personal computing (Weiser, Open House 2). Mark Weiser, who coined the term, along with his collaborators at Xerox PARC, envisioned a “new technological paradigm” which would leave behind the traditional one-to-one relationship between human and computer, and spread computation “ubiquitously, but invisibly, throughout the environment” (Weiser, Gold and Brown 693). Since then, the field has grown and now counts several peer-reviewed journals, conferences, and academic and industrial research centres around the world, which have set out to study the new “post-PC computing” under names such as Pervasive Computing, Ambient Intelligence, Tangible Computing, The Internet of Things, etc. Instead of providing a comprehensive account of all the different ubicomp incarnations, this paper seeks to focus on the early projects and writings of some of ubicomp’s most prominent figures and tease out, as a way of critique, the origins of some of its romantic promises. From the outset, ubiquitous computing was heavily informed by a human-centred approach that sought to shift the focus from the personal computer back to its users. On the grounds that the PC has dominated the technological landscape at the expense of its human counterparts, ubiquitous computing promised a different human-machine interaction, with “machines that fit the human environment instead of forcing humans to enter theirs” (104, my italics) placing the two in opposite and antagonistic terrains. The problem comes about in the form of interaction between people and machines … So when the two have to meet, which side should dominate? In the past, it has been the machine that dominates. In the future, it should be the human. (Norman 140) Within these early ubicomp discourses, the computer came to embody a technological menace, the machine that threatened the liberal humanist value of being free and in control. For example, in 1999 in a book that was characterized as “the bible of ‘post-PC’ thinking” by Business Week, Donald Norman exclaimed: we have let ourselves to be trapped. … I don’t want to be controlled by a technology. I just want to get on with my life, … So down with PC’s; down with computers. All they do is complicate our lives. (72) And we read on the website of MIT’s first ubicomp project Oxygen: For over forty years, computation has centered about machines, not people. We have catered to expensive computers, pampering them in air-conditioned rooms or carrying them around with us. Purporting to serve us, they have actually forced us to serve them. Ubiquitous computing then, in its early incarnations, was presented as the solution; the human-centred, somewhat natural approach, which would shift the emphasis away from the machine and bring control back to its legitimate owner, the liberal autonomous human subject, becoming the facilitator of our apparently threatened humanness. Its promise? An early promise of regressive augmentation, I would say, since it promised to augment our lives, not by changing them, but by returning us to a past, better world that the alienating PC has supposedly displaced, enabling us to “have more time to be more fully human” (Weiser and Brown). And it sought to achieve this through the key characteristic of invisibility, which was based on the paradox that while more and more computers will permeate our lives, they will effectively disappear. Ubicomp’s Early Romantic Promises The question of how we can make computers disappear has been addressed in computer research in various ways. One of the earliest and most prominent of these is the approach, which focuses on the physicality of the world seeking to build tangible interfaces. One of the main advocates of this approach is MIT’s Tangible Media Group, led by Professor Hiroshi Ishii. The group has been working on their vision, which they call “Tangible Bits,” for almost two decades now, and in 2009 they were awarded the “Lasting Impact Award” at the ACM Symposium on User Interface Software and Technology (UIST) for their metaDesk platform, presented in 1997 (fig.1), which explores the coupling of everyday physical objects with digital information (Ullmer and Ishii). Also, in 2004 in a special paper titled “Bottles: A Transparent Interface as a Tribute to Mark Weiser”, Ishii presented once again an early project he and his group developed in 1999, and for which they were personally commented by Weiser himself. According to Ishii, bottles (fig. 2)—a system which comprises three glass bottles “filled with music” each representing a different musical instrument, placed on a Plexiglas “stage” and controlled by their physical manipulation (moving, opening or closing them)—no less, “illustrates Mark Weiser’s vision of the transparent (or invisible) interface that weaves itself into the fabric of everyday life” (1299). Figure 1: metaDesk platform (MIT Tangible Media Group) Figure 2: musicBottles (MIT Tangible Media Group) Tangible computing was based on the premise that we inhabit two worlds: the physical world and cyberspace, or as Ishii and Ullmer put it, the world of atoms and the world of bits claiming that there is gap between these two worlds that left us “torn between these parallel but disjoint spaces” (1). This agreed with Weiser’s argument that cyberspace, and specifically the computer, has taken centre stage leaving the real world—the real people, the real interactions—in the background and neglected. Tangible computing then sought to address this problem by "bridging the gaps between both cyberspace and the physical environment" (1). As Ishii and Ullmer wrote in 1997: The aim of our research is to show concrete ways to move beyond the current dominant model of GUI [Graphic User Interface] bound to computers with a flat rectangular display, windows, a mouse, and a keyboard. To make computing truly ubiquitous and invisible, we seek to establish a new type of HCI that we call "Tangible User Interfaces" (TUIs). TUIs will augment the real physical world by coupling digital information to everyday physical objects and environments. (2) “Our intention is to take advantage of natural physical affordances to achieve a heightened legibility and seamlessness of interaction between people and information” (2). In his earlier work computer scientist Paul Dourish turned to phenomenology and the concept of embodiment in order to develop an understanding of interaction as embodied. This was prior to his recent work with cultural anthropologist Bell where they examined the motivating mythology of ubiquitous computing along with the messiness of its lived experience (Dourish and Bell). Dourish, in this earlier work observed that one of the common critical features early tangible and ubiquitous computing shared is that “they both attempt to exploit our natural familiarity with the everyday environment and our highly developed spatial and physical skills to specialize and control how computation can be used in concert with naturalistic activities” (Context-Aware Computing 232). They then sought to exploit this familiarity in order to build natural computational interfaces that fit seamlessly within our everyday, real world (Where the Action Is 17). This idea of an existing set of natural tactile skills appears to come hand-in-hand with a nostalgic, romantic view of an innocent, simple, and long gone world that the early projects of tangible and ubiquitous computing sought to revive; a world where the personal computer not only did not fit, an innocent world in fact displaced by the personal computer. In 1997, Ishii and Ullmer wrote about their decision to start their investigations about the “future of HCI” in the museum of the Collection of Historic Scientific Instruments at Harvard University in their efforts to get inspired by “the aesthetics and rich affordances of these historical scientific instruments” concerned that, “alas, much of this richness has been lost to the rapid flood of digital technologies” (1). Elsewhere Ishii explained that the origin of his idea to design a bottle interface began with the concept of a “weather forecast bottle;” an idea he intended to develop as a present for his mother. “Upon opening the weather bottle, she would be greeted by the sound of singing birds if the next day’s weather was forecasted to be clear” (1300). Here, we are introduced to a nice elderly lady who has opened thousands of bottles while cooking for her family in her kitchen. This senior lady; who is made to embody the symbolic alignment between woman, the domestic and nature (see Soper, Rose, Plumwood); “has never clicked a mouse, typed a URL, nor booted a computer in her life” (Ishii 1300). Instead, “my mother simply wanted to know the following day’s weather forecast. Why should this be so complicated?” (1300, my italics). Weiser also mobilised nostalgic sentiments in order to paint a picture of what it would be to live with ubiquitous computing. So, for example, when seeking a metaphor for ubiquitous computing, he proposed “childhood – playful, a building of foundations, constant learning, a bit mysterious and quickly forgotten by adults” (Not a Desktop 8). He viewed the ubicomp home as the ideal retreat to a state of childhood; playfully reaching out to the unknown, while being securely protected and safely “at home” (Open House). These early ideas of a direct experience of the world through our bodily senses along with the romantic view of a past, simple, and better world that the computer threatened and that future technological developments promised, could point towards what Leo Marx has described as America’s “pastoral ideal”, a force that, according to Marx, is ingrained in the American view of life. Balancing between primitivism and civilisation, nature and culture, the pastoral ideal “is an embodiment of what Lovejoy calls ‘semi-primitivism’; it is located in a middle ground somewhere ‘between’, yet in a transcendent relation to, the opposing forces of civilisation and nature” (Marx 23). It appears that the early advocates of tangible and ubiquitous computing sought to strike a similar balance to the American pastoral ideal; a precarious position that managed to reconcile the disfavour and fear of Europe’s “satanic mills” with an admiration for the technological power of the Industrial Revolution, the admiration for technological development with the bucolic ideal of an unspoiled and pure nature. But how was such a balance to be achieved? How could the ideal middle state be achieved balancing the opposing forces of technological development and the dream of the return to a serene pastoral existence? According to Leo Marx, for the European colonisers, the New World was to provide the answer to this exact question (101). The American landscape was to become the terrain where old and new, nature and technology harmonically meet to form a libertarian utopia. Technology was seen as “‘naturally arising’ from the landscape as another natural ‘means of happiness’ decreed by the Creator in his design of the continent. So, far from conceding that there might be anything alien or ‘artificial’ about mechanization, technology was seen as inherent in ‘nature’; both geographic and human” (160). Since then, according to Marx, the idea of the “return” to a new Golden Age has been engrained in the American culture and it appears that it informs ubiquitous computing’s own early visions. The idea of a “naturally arising” technology which would facilitate our return to the once lost garden of security and nostalgia appears to have become a common theme within ubiquitous computing discourses making appearances across time and borders. So, for example, while in 1991 Weiser envisioned that ubiquitous technologies will make “using a computer as refreshing as taking a walk in the woods” (21st Century Computer 11), twelve years later Marzano writing about Philip’s vision of Ambient Intelligence promised that “the living space of the future could look more like that of the past than that of today” (9). While the pastoral defined nature in terms of the geographical landscape, early ubiquitous computing appeared to define nature in terms of the objects, tools and technologies that surround us and our interactions with them. While pastoral America defined itself in contradistinction to the European industrial sites and the dirty, smoky and alienating cityscapes, within those early ubiquitous computing discourses the role of the alienating force was assigned to the personal computer. And whereas the personal computer with its “grey box” was early on rejected as the modern embodiment of the European satanic mills, computation was welcomed as a “naturally arising” technological solution which would infuse the objects which, “through the ages, … are most relevant to human life—chairs, tables and beds, for instance, … the objects we can’t do without” (Marzano 9). Or else, it would infuse the—newly constructed—natural landscape fulfilling the promise that when the “world of bits” and the “world of atoms” are finally bridged, the balance will be restored. But how did these two worlds come into existence? How did bits and atoms come to occupy different and separate ontological spheres? Far from being obvious or commonsensical, the idea of the separation between bits and atoms has a history that grounds it to specific times and places, and consequently makes those early ubiquitous and tangible computing discourses part of a bigger story that, as documented (Hayles) and argued (Agre), started some time ago. The view that we inhabit the two worlds of atoms and bits (Ishii and Ullmer) was endorsed by both early ubiquitous and tangible computing, it was based on the idea of the separation of computation from its material instantiation, presenting the former as a free floating entity able to infuse our world. As we saw earlier, tangible computing took the idea of this separation as an unquestionable fact, which then served as the basis for its research goals. As we read in the home page of the Tangible Media Group’s website: Where the sea of bits meets the land of atoms, we are now facing the challenge of reconciling our dual citizenship in the physical and digital worlds. "Tangible Bits" is our vision of Human Computer Interaction (HCI): we seek a seamless coupling of bits and atoms by giving physical form to digital information and computation (my italics). The idea that digital information does not have to have a physical form, but is given one in order to achieve a coupling of the two worlds, not only reinforces the view of digital information as an immaterial entity, but also places it in a privileged position against the material world. Under this light, those early ideas of augmentation or of “awakening” the physical world (Ishii and Ullmer 3) appear to be based on the idea of a passive material world that can be brought to life and become worthy and meaningful through computation, making ubiquitous computing part of a bigger and more familiar story. Restaging the dominant Cartesian dualism between the “ensouled” subject and the “soulless” material object, the latter is rendered passive, manipulable, and void of agency and, just like Ishii’s old bottles, it is performed as a mute, docile “empty vessel” ready to carry out any of its creator’s wishes; hold perfumes and beverages, play music, or tell the weather. At the same time, computation was presented as the force that could breathe life to a mundane and passive world; a free floating, somewhat natural, immaterial entity, like oxygen (hence the name of MIT’s first ubicomp project), like the air we breathe that could travel unobstructed through any medium, our everyday objects and our environment. But it is interesting to see that in those early ubicomp discourses computation’s power did not extend too far. While computation appeared to be foregrounded as a powerful, almost magic, entity able to give life and soul to a soulless material world, at the same time it was presented as controlled and muted. The computational power that would fill our lives, according to Weiser’s ubiquitous computing, would be invisible, it wouldn’t “intrude on our consciousness” (Weiser Not a Desktop 7), it would leave no traces and bring no radical changes. If anything, it would enable us to re-establish our humanness and return us to our past, natural state promising not to change us, or our lives, by introducing something new and unfamiliar, but to enable us to “remain serene and in control” (Weiser and Brown). In other words, ubiquitous computing, as this early story goes, would not be alienating, complex, obtrusive, or even noticeable, for that matter, and so, at the end of this paper, we come full circle to ubicomp’s early goals of invisibility with its underpinnings of the precarious pastoral ideal. This short paper focused on some of ubicomp’s early stories and projects and specifically on its promise to return us to a past and implicitly better world that the PC has arguably displaced. By reading these early promises of, what I call, regressive augmentation through Marx’s work on the “pastoral ideal,” this paper sought to tease out, in order to unsettle, the origins of some of ubicomp’s romantic promises. References Agre, P. E. 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