Production planning of a furniture manufacturing company with random demand and production capacity using stochastic programming.

In this article two multi-stage stochastic linear programming models are developed, one applying the stochastic programming solver integrated by Lingo 17.0 optimization software that utilizes an approximation using an identical conditional sampling and Latin-hyper-square techniques to reduce the sample variance, associating the probability distributions to normal distributions with defined mean and standard deviation; and a second proposed model with a discrete distribution with 3 values and their respective probabilities of occurrence. In both cases, a scenario tree is generated. The models developed are applied to an aggregate production plan (APP) for a furniture manufacturing company located in the state of Hidalgo, Mexico, which has important clients throughout the country. Production capacity and demand are defined as random variables of the model. The main purpose of this research is to determine a feasible solution to the aggregate production plan in a reasonable computational time. The developed models were compared and analyzed. Moreover, this work was complemented with a sensitivity analysis; varying the percentage of service level, also, varying the stochastic parameters (mean and standard deviation) to test how these variations impact in the solution and decision variables.

Improved privacy preserving method for periodical SRS publishing.

Spontaneous reporting systems (SRSs) are used to collect adverse drug events (ADEs) for their evaluation and analysis. Periodical SRS data publication gives rise to a problem where sensitive, private data can be discovered through various attacks. The existing SRS data publishing methods are vulnerable to Medicine Discontinuation Attack(MD-attack) and Substantial symptoms-attack(SS-attack). To remedy this problem, an improved periodical SRS data publishing-PPMS(k, θ, ɑ)-bounding is proposed. This new method can recognize MD-attack by ensuring that each equivalence group contains at least k new medicine discontinuation records. The SS-attack can be thwarted using a heuristic algorithm. Theoretical analysis indicates that PPMS(k, θ, ɑ)-bounding can thwart the above-mentioned attacks. The experimental results also demonstrate that PPMS(k, θ, ɑ)-bounding can provide much better protection for privacy than the existing method and the new method dose not increase the information loss. PPMS(k, θ, ɑ)-bounding can improve the privacy, guaranteeing the information usability of the released tables.

Interior design in cancer care: simple structural solutions in storey houses improve patients' quality of life, mood and performance.

Storey duplex houses are today one of the fastest growing housing market. The key of success is that this kind of house architecture presents esthetic and practical advantages in the average family daily life, but its narrow indoor staircase connecting the ground floor (floor of family activities) to the "bedroom floor" may constitute a potential detriment for the care and quality of life of patients with advanced cancer. Due to cancer cachexia, cancer pain and asthenia, the patients' incapacity to use narrow stairs will become soon an impassable barrier. Alone at the bedroom floor in solitude, depression, months /years exclusion from family daily life, and incapacity to reach medical care services harm not only their quality of life but also the same survival outcome. Creation of a provisional functional room at the ground floor (by low cost easily-removable aluminum door and aluminum panels) enambles patients to return to family life, improve their mood, quality of life and likely survival. Concluding, in the era of storey houses housing markets, homify and interior architecture design interventions may represent a new cost-effective horizon in cancer care.

The work environment pilot: An experiment to determine the optimal office design for a technology company.

Over the past few decades many corporate organisations have moved to open-plan office designs, mostly due to financial and logistical benefits. However, recent studies have found significant drawbacks to open plan offices and it is unclear how office designs can facilitate the best work output and company culture. Current design practice aims to optimise efficiency of space, but no previous research has tested the effect of office design experimentally in a working office. This paper describes an experiment comparing four different office designs (Open-plan, Zoned open-plan, Activity based, and Team offices) against a suite of wellbeing and productivity metrics in a real world technology company. Results suggest that two very different designs (Zoned open-plan and Team offices) perform well compared to Open-plan office designs. Zoned open-plan and Team office designs improved employee satisfaction, enjoyment, flow, and productivity, while Activity based and Open-plan designs performed poorly by comparison. The Open-plan office design was rated more poorly by employees, had higher levels of unsafe noise, and once employees no longer had to be in the Open-plan office design of the experiment, they spent more time at their desks.

Simulation-Based Mock-Up Evaluation of a Universal Operating Room.

Designing or renovating a physical environment for healthcare is a complex process and is critical for both the staff and the patients who rely on the environment to support and facilitate patient care. Conducting a simulation-based mock-up evaluation as part of the design process can enhance patient safety, staff efficiency, as well as user experience, and can yield financial returns. A large urban tertiary care center located in Vancouver, Canada followed a framework to evaluate the proposed design template for 28 universal operating rooms (ORs) included within the OR Renewal Project scope. Simulation scenarios were enacted by nursing staff, surgeons, anesthesiologists, residents, radiology techs, and anesthesia assistants. Video and debriefing data were used to conduct link analyses, as well as analyses of observed behaviors including congestions and bumps to generate recommendations for evidence-based design changes that were presented to the project team. Recommendations incorporated into the design included relocating doors, booms, equipment, and supplies, as well as reconfigurations to workstations. These recommendations were also incorporated into the mock-up and retested to iteratively develop and evaluate the design. Findings suggest that incorporating the recommended design changes resulted in better room utilization, decreased congestion, and enhanced access to equipment.

Decentralized Nurse Stations: A Methodology for Using Research to Guide Design Decisions.

PURPOSE: The purpose of this methodology is to define a process for facility planning teams to use to ensure research findings are used to guide decision making in the design process. BACKGROUND: Over the past decade and a half, research in health facility design has developed and the body of knowledge has grown significantly, but at the same time, the process for incorporating these findings into the design process has been less defined. This methodology evolved out of the desire to develop a structured process to integrate recent research findings into the planning and programming process at the user group and planning team level. METHOD: This two-phase methodology consists of, first, reviewing recent, relevant research on the topic, classifying the findings into positive and negative attributes and, then, summarizing the attributes by category on a summary table and in a brief narrative. The second phase consists of reviewing the research to identify operational and facility strategies that can be used to mitigate the inconsistent and negative attributes identified. RESULTS: In the case study, as a result of this process, one inconsistent attribute and three negative attributes were identified. In the second phase, potential research-based operational and facility strategies were identified to mitigate the inconsistent and negative attributes identified. This information served as the basis for making design decisions. CONCLUSIONS: This methodology presents an organized, efficient process for organizing and providing relevant research findings to a facility planning team to use in evaluating a new healthcare design concept and making research-based design decisions.

Functional Workspace Optimization via Learning Personal Preferences from Virtual Experiences.

The functionality of a workspace is one of the most important considerations in both virtual world design and interior design. To offer appropriate functionality to the user, designers usually take some general rules into account, e.g., general workflow and average stature of users, which are summarized from the population statistics. Yet, such general rules cannot reflect the personal preferences of a single individual, which vary from person to person. In this paper, we intend to optimize a functional workspace according to the personal preferences of the specific individual who will use it. We come up with an approach to learn the individual's personal preferences from his activities while using a virtual version of the workspace via virtual reality devices. Then, we construct a cost function, which incorporates personal preferences, spatial constraints, pose assessments, and visual field. At last, the cost function is optimized to achieve an optimal layout. To evaluate the approach, we experimented with different settings. The results of the user study show that the workspaces updated in this way better fit the users.

The reachable 3-D workspace volume is a measure of payload and body-mass-index: A quasi-static kinetic assessment.

An experimental protocol with five tasks is proposed for a low-cost empirical assessment of the reachable 3-D workspace (RWS), including both close-to-torso and far-from-torso regions. Ten participants repeated the protocol for four distinct hand payloads. The RWS expressed as a point cloud and its non-convex alpha-shape were obtained for each case. Moreover, individual strength surrogates for glenohumeral flexion and abduction, and elbow flexion were collected using a dynamometer. The RWS volume was statistically modelled using payload, body-mass-index and the strength surrogates as predictors. For increasing payload, a significant (r = -0.736,p < 0.001) decrease in RWS volume was found for distinct payload cases across all subjects. The only significant predictors found for the RWS volume were normalized payload (F = 73.740,p < 0.001) and body-mass-index (F = 11.008,p = 0.003). No significant interactions were found. The consequent regression model (F(2,27) = 41.11, p < 0.001, Radj2 = 0.7345) explained around 73% of the variation in the data. The RWS volume is a function of payload and body-mass-index.

The office changes leading to sit-to-stand ergonomics.

The office ergonomic design from the late 1980s to the present has undergone significant changes during the transition from typewriters to the various human computer interfaces that evolved to the present day. Designs to accommodate various sized monitors and pointing devices have posed a challenge for ergonomist and designers of office workstations. Recent research suggesting adverse health effects associated with sedentary work environments have put additional pressure to incorporate the option to stand while working. This article reviews the current available options and suggests approaches to workplace design to meet the desire for employees to vary their work environment and the concern by management for worker health.

New Prototype Screened Doors and Windows for Excluding Mosquitoes from Houses: A Pilot Study in Rural Gambia.

Despite compelling evidence that modern housing protects against malaria, houses in endemic areas are still commonly porous to mosquitoes. The protective efficacy of four prototype screened doors and two windows designs against mosquito house entry, their impact on indoor climate, as well as their use, durability and acceptability was assessed in a Gambian village. A baseline survey collected data on all the houses and discrete household units, each consisting of a front and back room, were selected and randomly allocated to the study arms. Each prototype self-closing screened door and window was installed in six and 12 units, respectively, with six unaltered units serving as controls. All prototype doors reduced the number of house-entering mosquitoes by 59-77% in comparison with the control houses. The indoor climate of houses with screened doors was similar to control houses. Seventy-nine percentage of door openings at night occurred from dusk to midnight, when malaria vectors begin entering houses. Ten weeks after installation the doors and windows were in good condition, although 38% of doors did not fully self-close and latch (snap shut). The new doors and windows were popular with residents. The prototype door with perforated concertinaed screening was the best performing door because it reduced mosquito entry, remained fully functional, and was preferred by the villagers. Screened doors and windows may be useful tools for reducing vector exposure and keeping areas malaria-free after elimination, when investment in routine vector control becomes difficult to maintain.

Mobiliários e instalações sanitárias em unidades de saúde da família: acessibilidade física para pessoas com deficiência / Furniture and sanitary facilities in family health units: accessibility for physical disability

Objetivo: Investigar a acessibilidade física de mobiliários, equipamentos e instalações sanitárias em Unidades de Saúde de Família. Método: Trata-se de pesquisa descritiva exploratória, de base populacional, realizada nas Unidades de Saúde da Família do município de João Pessoa, Paraíba, Brasil. Utilizou-se um checklist fundamentado na Norma Brasileira 9050. Resultados: Dos 90 prédios avaliados, 83,3% dos balcões e das mesas de trabalho e 85,6% dos assentos ambulatoriais estão adequados, como preconizado pela legislação. Entretanto, apenas 24,4% dos bebedouros estão instalados adequadamente. Nenhuma das unidades apresentou textos contendo orientações e instruções escritas em braille; 60,0% não têm sanitários adequados, e 92,2% não estão devidamente sinalizados. Conclusão: Ainda são muitas as barreiras encontradas pelas pessoas com deficiência para o uso dos serviços de atenção básica à saúde. Nesse sentido, se faz necessário, intervenções específicas a esse grupo populacional e a avaliação das políticas públicas, para efetivar tudo o que é garantido por lei

Objective: To investigate the physical accessibility of furniture, equipment and sanitary facilities in Family Health Units. Method: This is an exploratory descriptive research, population-based, carried out in the Family health units of João Pessoa, Paraíba, Brazil. We used a checklist based on the Brazilian Standard 9050. Results: From the 90 assessed buildings, 83.3% of branches and desks and 85.6% of outpatient seats are adequate, as recommended by law. However, only 24.4% of the drinking fountains are installed properly. None of the units presented texts containing guidelines and instructions written in braille; 60.0% do not have adequate sanitation, and 92.2% are not properly signed. Conclusion: There are still many barriers faced by people with disabilities for the use of primary care services to health. In this sense, specific interventions are necessary to this population group and evaluation of public policies, to accomplish all that is guaranteed by law

Objetivo: Investigar la accesibilidad física de los muebles, equipos e instalaciones sanitarias en las Unidades de Salud de la Familia. Método: Se trata de un estudio exploratorio descriptivo, una basada en la población, llevado a cabo en las unidades de salud del município John Familia Pessoa, Paraíba, Brasil. Se utilizó una lista de control basado en el estándar de Brasil 9050. Resultados: 90 edificios evaluados, el 83,3% de las oficinas y los escritorios y el 85,6% de los puestos de consulta externa son adecuados, según lo recomendado por la ley. Sin embargo, sólo el 24,4% de las fuentes de agua potable están instalados correctamente. Ninguna de las unidades presenta textos que contienen directrices e instrucciones escritas en Braille; 60.0% no cuenta com saneamiento adecuado, y el 92,2% no ha iniciado correctamente. Conclusión: Todavía hay muchas barreras que enfrentan las personas con discapacidad a la utilización de los servicios de atención primaria a la salud. En este sentido, es necesario, intervenciones específicas para este grupo de población y la evaluación de políticas públicas, para llevar a cabo todo lo que está garantizado por la ley

Bright paint makes interior-space surfaces appear farther away.

Previous studies have reported that bright ceilings appear higher than dark ceilings, irrespective of the other colorimetric properties of the ceiling color (hue, saturation) and irrespective of the luminance of the remaining room surfaces (walls, floor). In the present study, we expand these findings to width and depth estimates. We presented stereoscopic full-scale room simulations on a head-mounted display and varied the luminance of the side walls, rear wall, and ceiling independently of each other. Participants judged the width and depth of the simulated rooms. Our results show that the perceived spatial layout of a given room is significantly influenced by the luminance of the direct bounding surfaces (e.g., the side walls when judging perceived width) but less affected by the luminance of the other surfaces. In the discussion, we provide an overall picture of effects of surface luminance on the perceived layout of interior spaces and discuss the conclusions in the context of existing interior-design guidelines.

Using an integrative mock-up simulation approach for evidence-based evaluation of operating room design prototypes.

This paper describes the process and tools developed as part of a multidisciplinary collaborative simulation-based approach for iterative design and evaluation of operating room (OR) prototypes. Full-scale physical mock-ups of healthcare spaces offer an opportunity to actively communicate with and to engage multidisciplinary stakeholders in the design process. While mock-ups are increasingly being used in healthcare facility design projects, they are rarely evaluated in a manner to support active user feedback and engagement. Researchers and architecture students worked closely with clinicians and architects to develop OR design prototypes and engaged clinical end-users in simulated scenarios. An evaluation toolkit was developed to compare design prototypes. The mock-up evaluation helped the team make key decisions about room size, location of OR table, intra-room zoning, and doors location. Structured simulation based mock-up evaluations conducted in the design process can help stakeholders visualize their future workspace and provide active feedback.

Exploring the Concept of Healing Spaces.

Evidence-based design (EBD) research has demonstrated the power of environmental design to support improved patient, family, and staff outcomes and to minimize or avoid harm in healthcare settings. While healthcare has primarily focused on fixing the body, there is a growing recognition that our healthcare system could do more by promoting overall wellness, and this requires expanding the focus to healing. This article explores how we can extend what we know from EBD about health impacts of spatial design to the more elusive goal of healing. By breaking the concept of healing into antecedent components (emotional, psychological, social, behavioral, and functional), this review of the literature presents the existing evidence to identify how healthcare spaces can foster healing. The environmental variables found to directly affect or facilitate one or more dimension of healing were organized into six groups of variables-homelike environment, access to views and nature, light, noise control, barrier-free environment, and room layout. While there is limited scientific research confirming design solutions for creating healing spaces, the literature search revealed relationships that provide a basis for a draft definition. Healing spaces evoke a sense of cohesion of the mind, body, and spirit. They support healing intention and foster healing relationships.

Evidence-based practice guidelines for prescribing home modifications for clients with bariatric care needs.

BACKGROUND/AIM: Home modifications maintain people's functional independence and safety. No literature exists to guide the prescription of home modifications for clients with bariatric care needs. With Australia's increasing obesity rate, more evidence is needed to support home modification prescribers. This study aimed to map Australian home modification prescribing practices for clients with bariatric care needs and to establish and evaluate a clinical resource for this prescription process. METHODS: The study included two phases. Phase 1 conducted a cross-sectional survey of therapists practicing in Australia, and Australian industry partners who prescribe or install home modifications for clients with bariatric care needs. Phase 2 included design, implementation and evaluation of a clinical resource. Data were analysed with means and frequencies; multivariable regression analysis was used to explore prescribing habits. RESULTS: Therapists surveyed (n = 347) reported 11 different bariatric weight definitions. Less than 3% constantly or regularly prescribed home modifications for these clients; rails were most commonly prescribed. Many therapists (n = 171, 58%) 'never' or 'rarely' knew rail load capacity. Therapists' knowledge of rail load capacity was associated with previous experience prescribing home modifications (P = 0.009); rail manufacturer's advice (P = 0.016) and not using advice from builders (P = 0.001). Clinical resources were used by 11% (n = 26) of therapists to support their prescription, and industry sporadically relied on therapists to specify modification design requirements (n = 5, 45%). Post-implementation of a clinical resource increased consensus regarding understanding of the term bariatric and increased consultation with builders and manufacturers. CONCLUSION: There was a lack of consistency in bariatric terminology, uncertainty of rail load capacities and minimal use of clinical practice guidelines. Additional resources will assist with consistency in prescribing practices to maximise occupational performance for clients with bariatric care needs.

The high and low comfort peaks in passengers' flight.

BACKGROUND: Knowing the high and low peaks in comfort during a flight could be useful in prioritizing aircraft interior improvements. OBJECTIVE: The first objective of this study was to identify whether there are differences in comfort experiences during different phases of a flight. The second objective of this study was to identify similarities between recalled and real time reported comfort experiences. METHODS: 149 participants were asked to rate the comfort in the different phases of their last flight on a scale from 1-10. Additionally, a combination of a self-reporting design probe and generative interview was used to investigate the appraisal patterns of emotions in nine passengers. RESULTS: The 149 subjects reported the highest comfort after take-off and arriving at the destination, the lowest while stowing the luggage and during the cruise flight. The qualitative long haul inflight study showed after take-off and while arriving at the destination the most positive emotions and during the cruise flight there is a negative experience phase. CONCLUSIONS: Suggestions are given to improve the cruise flight phase, by for example stimulation of movement or better service.

Feng shui And Emotional Response in the Critical care Environment (FARCE) study.

The aim of this study was to investigate the relationship between nursing staff emotions and their surrounding environment, using the ancient system of feng shui. Two orientations of critical care bed spaces (wind and water groups, respectively) were mapped using a western bagua. Energy or 'chi' scores for nine emotions were calculated based on the positive or negative flow of chi in each of the two groups. During a two-week period, nursing staff were allocated to work in a bed space in either the wind or water groups; nursing staff who were not allocated to a study bed space acted as a control group. Participating nursing staff completed a questionnaire, ranking nine emotional states and their overall inner harmony, using a 11-point chi scale. In total, 108 questionnaires were completed. Critical bed space orientation according to feng shui principles was not related to nurse-reported chi scores or inner harmony (p > 0.05 for all measurements). There was also poor correlation between the bagua-predicted and reported chi scores for both the wind and water groups (R2  = 0.338 and 0.093, respectively). The use of feng shui to guide the layout of critical care bed spaces does not improve the emotional well-being of nursing staff.

Improving Student Commitment to Healthcare-Related Design Practice by Improving the Studio Learning Experience.

OBJECTIVE: This case study explores the influence of the healthcare design studio experience on students' short-term professional goals as measured through rates of healthcare-related certification and internship/employment. BACKGROUND: The value and relevance of interior design is evident in the healthcare design sector. However, interior design students may not perceive this value if it is not communicated through their design education. Students' experience in the design studio plays a crucial role in determining career choices, and students may be more committed to career goals when there is clear connection between major coursework and professional practice. METHOD: The authors compared healthcare-related certification and internship/employment levels between two student cohorts in a capstone undergraduate interior design healthcare design studio course. The first cohort was led by the existing curriculum. The second cohort was led by the revised curriculum that specifically aimed at encouraging students to commit to healthcare-related design practice. RESULTS: When measured at 3 months from graduation, the second cohort, led by the revised curriculum, saw a 30% increase in Evidence-based Design Accreditation and Certification exam pass rates and a 40% increase in healthcare-related internship/employment. CONCLUSION: The challenge of interior design education is to instill in emerging professionals not only professional competence but also those professional attitudes that will make them better prepared to design spaces that improve quality of life, particularly in healthcare environments. The results exceeded the project goals, and so this could be considered a promising practice for courses focused on healthcare design education.