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Cocina solar parabólica para vendedores ambulantes + (Deseamos trabajar con AES El Salvador, FUS … Deseamos trabajar con AES El Salvador, FUSADES, Unidad Ecológica Salvadoreña (UNES), EcoCasa, Mónica Taher y la Fundación Vida para reducir los costos de los pequeños negocios a base de energía solar, y que de esta manera los vendedores de comida en la calle puedan obtener más ganancias, gastar menos y cuidar al planeta.nancias, gastar menos y cuidar al planeta.)
Desertification + (Desertification is the degradation of arid land in which this arid land becomes even more drier, losing any fauna and flora in the process.)
Sun-dried/Revisión bibliográfica + (Deshidratador solar de alimentos (2008). Transferencia de tecnología y divulgación sobre técnicas para el desarrollo humano. Recuperado de https://ecotec.unam.mx/wp-content/uploads/Manual-para-la-construccion-de-Deshidratador-Solar.pdf)
Design for Human Scale + (Design for Human Scale (1983) by Victor Papanek[[Wikipedia:Victor Papanek|W]] is a book about design with a focus on what is appropriate and needed by humans.)
Additively Manufactured Parametric Universal Clip-System: An Open Source Approach for Aiding Personal Exposure Measurement in the Breathing Zone + (Design for additive manufacturing is adopt … Design for additive manufacturing is adopted to help solve problems inherent to attaching active personal sampler systems to workers for monitoring their breathing zone. A novel and parametric 3D printable clip system was designed with an open source Computer-aided design (CAD) system and was additively manufactured. The concept was first tested with a simple clip design, and when it was found to be functional, the ability of the innovative and open source design to be extended to other applications was demonstrated by designing another tooling system. The clip system was tested for mechanical stress test to establish a minimum lifetime of 5000 openings, a cleaning test, and a supply chain test. The designs were also tested three times in field conditions. The design cost and functionalities of the clip system were compared to commercial systems. This study presents an innovative custom-designed clip system that can aid in attaching different tools for personal exposure measurement to a worker's harness without hindering the operation of the worker. The customizable clip system opens new possibilities for occupational health professionals since the basic design can be altered to hold different kinds of samplers and tools. The solution is shared using an open source methodology.s shared using an open source methodology.)
Design that matters + (Design that Matters (DtM), a 501c3 nonprof … Design that Matters (DtM), a 501c3 nonprofit based in Cambridge, Massachusetts, creates new products that allow social enterprises in developing countries to offer improved services and scale more quickly. DtM has built a collaborative design process through which hundreds of volunteers in academia and industry donate their skills and expertise to the creation of breakthrough products for communities in need.kthrough products for communities in need.)
215 Solar for low power medical equipment + (Designed and constructed in Spring of 2022, the low-power/high-value PV system was built to provide power to low-end medical equipment such as glucometers and Continuous Positive Airway Pressure (CPAPs) in the event of a power outage or "brown out.")
OSAT Wind Turbine + (Designed by Michigan Tech students, this project aims to make renewable energy more accessible.)
Medical Tweezers + (Designed in response to a request for Medi … Designed in response to a request for Medical Tweezers from Field Ready. This is a versatile design for Medical Tweezers as it's designed in openSCAD to be customized to the user's desire, such as number or teeth, grip points, space between each grip, size of the tip, and etc. Designed to print without supports.d etc. Designed to print without supports.)
Herb garden designs + (Designing a herb garden is a part of the j … Designing a herb garden is a part of the joy of growing herbs. There are many ways to put together a herb garden, from orderly to random and everything in between. This article intends to help growers with a range of ideas for designing herb gardens by outlining the various possible herb garden designs and grow tents, and you are encouraged to build on existing suggestions or add more of your own ideas here.stions or add more of your own ideas here.)
Open source nanotechnology + (Despite being an extremely active area for … Despite being an extremely active area for academic research, publishing and patent applications, nanotechnology development is being hindered by current intellectual property (IP) law. Patenting of basic science and entire classes of nanotechnologies is leading to higher transaction costs, slower technical development and the removal of obvious knowledge from the public domain. This effectively hamstrings the current primal nanotechnology development, in contrast to the history of other emerging technical fields (e.g. software).emerging technical fields (e.g. software).)
Open-source nanotechnology: solutions to a modern intellectual property tragedy + (Despite being an extremely active area for … Despite being an extremely active area for patent applications, nanotechnology development is being impaired by current intellectual property law. In contrast to other emerging fields at their times, nanotechnology was born as the Bayh–Dole Act enabled universities to lock down fundamental research effectively preventing open competition. Both technical complexity and bureaucratic mishandling of nanotechnology patent applications have created a dense patent thicket of overlapping claims and rights. This intellectual property tragedy restricts downstream innovation by preventing development of more complex technologies due to exorbitant transaction costs. This article addresses this tragedy with the application of the free and open-source paradigm from software development as open-source methodologies will both accelerate nanotechnology innovation and improve the social return from public investment in nanotechnology research.lic investment in nanotechnology research.)
Optimal inverter and wire selection for solar photovoltaic fencing applications + (Despite the benefits and the economic adva … Despite the benefits and the economic advantages of agrivoltaics, capital costs limit deployment velocity. One recent potential solution to this challenge is to radically reduce the cost of racking materials by using existing farm fencing as vertical photovoltaic (PV) racking. This type of fenced-based PV system is inherently electrically challenging because of the relatively long distances between individual modules that are not present in more densely packed conventional solar PV farms. This study provides practical insights for inverter selection and wire sizing optimization for fence-based agrivoltaic systems. Numerical simulation sensitivities on the levelized cost of electricity (LCOE) were performed for 1) distance from the fence to the AC electrical panel, 2) inverter costs, and 3) geographic locations. The results showed that microinverters had better performance when the cross-over fence length was under 30 m or when the system was designed with less than seven solar PV modules, whereas string inverters were a better selection for longer fences. The cross-over number of modules depends significantly on the cost of the inverters, which is a parameter that influences the system's design. The capital costs for a fence retrofit are far less than for any form of conventional PV racking. In addition, the LCOE of the vertical fencing solar agrivoltaic system can be competitive with conventional ground-mounted solar PV for the niche of farmers. Especially, when they are located between the latitudes of 10° and 50° in either the northern or southern hemisphere, and coupled with their ancillary benefits they represent a great alternative for conventional PV systems.t alternative for conventional PV systems.)
Decarbonizing the boardroom? Aligning electric utility executive compensation with climate change incentives + (Despite the drastic reversal of decarboniz … Despite the drastic reversal of decarbonization effort by the Trump administration, the majority of U.S. states continue policies aimed at reducing greenhouse gas (GHG) emissions and increasing renewable energy technology (RET) deployment. Although electrical power utilities are required and/or encouraged to comply with these policies, their executives lack direct incentives to do so. In this study, a novel incentive mechanism is evaluated for aligning utility executive compensation with such policies. First, an overview is provided on chief executive officer (CEO) pay and the GHG emissions of utilities. The relationship between GHG emissions, renewable energy diversification, and CEO pay is examined using the case study of three of the largest electric utilities in Michigan. The results show that the regulated utility market is not consistently rewarding CEOs with higher compensation for decreasing GHG emissions and that both an approach incentivizing RETs adoption and an approach encouraging GHG emissions have deficiencies. A combined approach is then analyzed that results in a compensation equation allowing for utility executives to receive incentive pay for reducing overall emissions and increasing renewable generation. The results indicate that by careful calibration of the proposed incentive equations the harmful effects of emissions can be prevented through CEO incentive pay.an be prevented through CEO incentive pay.)
4.3. Comunicación de los productos de conocimiento + (Después de producir los materiales correct … Después de producir los materiales correctos, es importante dar a conocer el trabajo y expandir su alcance. Esto no solo es un medio para dar a conocer el trabajo de las personas involucradas en el trabajo en campo y los equipos que participan del Mapeo de Soluciones, sino también para facilitar la colaboración a escala global. Con esto en mente, a continuación se presentan algunos consejos relacionados con la comunicación de los productos de conocimiento.nicación de los productos de conocimiento.)
Desuku + (Desuku es una mesa minimalista, práctica y funcional, diseñada para satisfacer las necesidades de las familias apoyadas por TECHO.)
OSHE Cinematography Quadcopter/Detailed Design and Analysis + (Detailed Design and Analysis)
Cold storage of fruits and vegetables + (Deterioration of fruits and vegetables dur … Deterioration of fruits and vegetables during storage depends largely on temperature. One way to slow down this change and so increase the length of time fruits and vegetables can be stored, is by lowering the temperature to an appropriate level. It must be remembered that if the temperature is too low the produce will be damaged and also that as soon as the produce leaves the cold store, deterioration starts again and often at a faster rate.n starts again and often at a faster rate.)
Building with Pumice/2 + (Deutsches Zentrum fï¿½r Entwicklungstechnologien-GATE)
Developing countries + (Developing countries, or Majority World, and/or the inaccurate, out-of-date terms the South and Third world all refer to the countries that rank the lowest on the Human Development Index.)
Culture of nice + (Development and aid work is mired in a cul … Development and aid work is mired in a culture of nice, and that culture keeps bad work from being eliminated and good work from getting better. We're too nice to call a bad project a bad project. When we criticize, we criticize in abstractions. No one has any problem identifying bad products as bad, but no one will ever call a bad program bad. For example, see Alanna Shaikh's blog post on NGOs that do harm, you'll see anonymous comments about unmade projects. We're addicted to nice.t unmade projects. We're addicted to nice.)
The Future We Deserve/Online Open Distance Learning - Anil Prasad + (Development of formal classroom study setu … Development of formal classroom study setups are now in a saturated situation. In most places further development of infrastructure for conventional classroom learning, especially for higher education, is quite difficult. On the administrative side reasons are many like constraints of space, resources, etc. On the learners' and parents' side, nowadays, a majority of people do not have the financial health to spend a lifetime for education alone. In these tightening economic circumstances, work and study is the only principle that can keep higher education accessible to all who seek it.r education accessible to all who seek it.)
ESEN Water Catchment System/Revisión bibliográfica + (Devin. (2010). Sunny Brae rainwater catchment system. Appropedia.)
Diablo Canyon earthquake vulnerability + (Diablo Canyon (Nuclear) Power Plant, locat … Diablo Canyon (Nuclear) Power Plant, located on the water's edge in San Luis Obispo County California, was originally designed to withstand a 6.75 magnitude earthquake from four faults, including the nearby San Andreas and Hosgri faults, but was later upgraded to withstand a 7.5 magnitude quake. It has redundant seismic monitoring and a safety system designed to shut it down promptly in the event of significant ground motion.e event of significant ground motion.)
Diagnostics + (Diagnosing diseases in rural and under-dev … Diagnosing diseases in rural and under-developed area presents several challenges. Patients may need to travel long distances for care and often do not return for test results. Lack of refrigeration limits the type of test that can be stored in a rural clinic. Local expertise in special testing may not be available to the local health care giver. These limitations have led to the development of several low-cost, simple diagnostic tests that give results within a matter of minutes. High incidences in rural areas of infectious diseases like HIV and malaria make these types of tests a key component in treating people sooner and reducing the spread of disease.sooner and reducing the spread of disease.)

(Diagrama de teoría del cambio)

Dialysis water cooler + (Dialysis is delivered in remote communitie … Dialysis is delivered in remote communities in small clinics, usually for one or two patients at a time, with each treatment lasting 5-6 hours. Each treatment uses RO water at about 500 ml/min. To generate RO water at about 50% efficiency, up to 1.0 L/min of town water is needed. Heat needs to be dumped at about 1.2 kW for each treatment chair. This should bring the supply water temperature down from up to 46 C to about 28 C. A suitable operating supply temperature is around 30 C or below.upply temperature is around 30 C or below.)
Diarrhea + (Diarrhea — loose, watery and possibly more-frequent bowel movements — is a common problem. Sometimes, it's the only symptom. At other times, it may be associated with other symptoms, such as nausea, vomiting, abdominal pain or weight loss.)
Diatomaceous earth + (Diatomaceous earth is a natural soft rock … Diatomaceous earth is a natural soft rock that crumbles into a fine pale-colored powder of small particle size, and is formed by silicon-based skeletons of diatoms settling as sediment. One form, amorphous, is a known cancer hazard, and is commonly used for filtration. Alternatively, food-grade diatomite is used in livestock feeds to control intestinal parasites and, as in foods, to prevent powders from caking. in foods, to prevent powders from caking.)
The Future We Deserve/Seawater into Food - Thomas Bjelkeman + (Did you know that the global population gr … Did you know that the global population grows by 75 million people every year? This means that we will most likely go from 6.8 billion people today to 9 billion by 2040. In turn, this means that we may have to double our food production by 2050, maybe more.e our food production by 2050, maybe more.)
CCAT Waschen und Spülen Toilette + (Die "Waschen & Spülen" ist ein umweltw … Die "Waschen & Spülen" ist ein umweltwissenschaftliches Projekt der Humboldt State Universität, welches durch Jeffrey Steuben, Annie Welbes und Tim Dower realisiert und in der Toilette im Untergeschoss des CCAT umgesetzt wurde. Es handelt sich um eine Modifikation der Toilette, die es dem Benutzer ermöglicht Wasser zu sparen, in dem das Abwasser des Händewasschens zum Spülen der Toilette wieder verwendet wird.zum Spülen der Toilette wieder verwendet wird.)
Was sind einige der natürlichen und grundlegenden Funktionen von Provigil? Wie wird es benutzt? + (Die Genesung des chronischen Müdigkeitssyn … Die Genesung des chronischen Müdigkeitssyndroms umfasst Ernährungsumstellungen, Fitness, Substanzrehabilitation, Ergotherapie und möglicherweise Körperarbeit. Dies ist die traditionelle Behandlung. Den Patienten wird empfohlen, eine gesunde Schlafhygiene aufrechtzuerhalten, sich ausgewogen zu ernähren, wenig Sport zu treiben und sich während der Trainingseinheiten regelmäßig auszuruhen. Traditionell werden Schlaftabletten, Opioide, Stimulanzien, Muskelrelaxantien, Betablocker, Antikonvulsiva und manchmal sogar Vasopressine verwendet, um die Symptome entsprechend anzupassen. Aber wussten Sie andererseits, dass es immer noch neuere Alternativen zur Behandlung des chronischen Müdigkeitssyndroms gibt?g des chronischen Müdigkeitssyndroms gibt?)
Komposthaufenheizung + (Die Komposthaufenheizung ist eine speziell … Die Komposthaufenheizung ist eine spezielle Form der Kompostheizung. Bei diesem Typ wird ein großer Komposthaufen im Freigelände mit einem mehr oder weniger gewundenen Wasserrohr durchzogen. Der Wasserkreislauf leitet die Kompostwärme ab und transportiert sie zu einem Nutzgebäude. Dort kann das durch den Komposthaufen erwärmte Wasser direkt in den Heizkreislauf eingespeist oder seine Wärme über einen Wärmetauscher an den Heizkreislauf abgeben werden.scher an den Heizkreislauf abgeben werden.)
Kompostheizungssilo (Prototyp) + (Dieser Artikel beschreibt den Prototypen eines Kompostheizungssilos. Hierbei handelt es sich um das Herzstück einer hausinternen Kompostheizung im Versuchsstadium.)
Kompostheizungssilo (Beton) + (Dieser Artikel beschreibt die erste Betonausführung eines Kompostheizungssilos. Hierbei handelt es sich um das Herzstück einer hausinternen Kompostheizung im regulären Betrieb.)
Filter für WasserPod-Kahn + (Dieser Artikel ist über den Filter Command … Dieser Artikel ist über den Filter Commander 9000, ein Projekt von den "Pod People," einer Studentenarbeitsgruppe von einem Kurs, Engineering 215, auf der Cal Poly Humboldt. Das Projekt hat als Nachfrage für ein Wasserfiltrationssytem angefangen, und hat einen Entwurfsprozess von fünf Arbeitsgängen durchgemacht, bevor es als Filter Commander 9000 fertiggemacht wurde. Diese Seite zeigt die Entwickung des Projekts von Design bis zum Bau und zur Anwendung, und macht Informationen verfügbar für diejenige, die das System nachbilden möchten.jenige, die das System nachbilden möchten.)
Feuchtbiotope der USA + (Dieser Artikel über die Feuchtbiotope pass … Dieser Artikel über die Feuchtbiotope passt nicht nur zu meinem Hauptfach (Ökologischebiologie), sondern es ist auch eine ausgezeichnete Gelegenheit, zu lernen, wie viel die Sümpfe und die Feuchtbiotope für unsere Gesellschaftvon Bedeutung sind. Der meistene überaschende Teil dieses Artikels ist wie wir aßen mit unsere Feuchtbiotop. Diese Flächen sind sehr wichtig für unsere Biotopaufrechterhaltung und wir haben das als annehmen gegeben. Obwohl wir haben zu viel diese Feuchtbiotope kaputtgemacht, wir machen die Entwicklung durch den Oberstes Bundesgericht bei versuchen zu Beschmutzung und Beeinträchtigung die Feuchtbiotope von Amerika halten.gung die Feuchtbiotope von Amerika halten.)
Low-cost air, noise, and light pollution measuring station with wireless communication and tinyML + (Different types of environmental pollution … Different types of environmental pollution cause negative consequences to ecosystems throughout the globe, which humanity is now trying to mitigate. To do this it is necessary to know the level of pollution problems in the immediate environment, to evaluate the impact of human activities, and to ensure habitability. For this reason, in this work, a low-cost pollution measurement station for outdoor or indoor use is proposed and developed that measures air pollution (particulate matter and CO2), noise (level and direction), light pollution (power and multispectral), and also relative humidity and ambient temperature. The system stores the data in an SD memory or transmits them in real-time to the internet via WiFi. The purpose of the system is to be used in environmental studies, to deploy monitoring networks, or to ensure the habitability of a living or working space. The prototype integrates the measurement of the different sources of contamination in a single compact device at USD$ 628.12 without sacrificing measurement accuracy, as corroborated by the validation performed for each variable with reference equipment, obtaining an average error of approximately 2.67% in the measurement of all the variables measured. The system is easy to assemble and has an option for power supply using solar photovoltaic devices and an alternative for connection to 2G/3G mobile networks.n alternative for connection to 2G/3G mobile networks.)
Differential scanning calorimetry procedure: FAST + (Differential scanning calorimetry experiments were conducted to analyze the thermal stability and characteristics of various proteins.)
ICT and climate change + (Digital technologies are currently widespread and increasing in use. However, they are an important source of environmental impact.)
Dill + (Dill (''Anethum graveolens'') is a hardy annual herb. This plant has been appreciated by human beings since ancient times.)
Dimensional analysis + (Dimensional analysis is a basic math skill … Dimensional analysis is a basic math skill used in thermodynamics whereby a measure of something is related in terms of units of something else. It is a method of converting the units of one term into the units of another, knowing that multiplying or dividing the term by a conversion factor does not change the actual value of the term itself.hange the actual value of the term itself.)
Dimethylether + (Dimethyl ether (DME) can be a diesel substitute. Only moderate modifications are needed to convert a diesel engine to burn DME. It is also used as a low-temperature solvent and extraction agent.)
Dipankar Chakraborti + (Dipankar Chakraborti was an early whistleb … Dipankar Chakraborti was an early whistleblower on arsenic in groundwater in Bangladesh[[[:Category:Pages needing verification|verification needed]]] and India. He is harshly critical of the ineffectiveness and even damaging effects of foreign aid.ness and even damaging effects of foreign aid.)
Direct current + (Direct current (DC or "continuous current" … Direct current (DC or "continuous current") is the unidirectional flow of electric charge. Direct current is produced by such sources as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type. Direct current may flow in a conductor such as a wire, but can also be through semiconductors, insulators, or even through a vacuum as in electron or ion beams. In direct current, the electric charges flow in the same direction, distinguishing it from alternating current (AC). A term formerly used for direct current was Galvanic current.d for direct current was Galvanic current.)
Practivistas Chiapas rainwater catchment + (Directing and capturing rainwater is an an … Directing and capturing rainwater is an ancient science that is still in practice today. In regions where water is scarce during a few or all seasons, maximizing the collection and storage of rainwater is useful. Rainwater catchment systems can replace or supplement municipal water sources which can be expensive, unsafe and/or unreliable. Our group was contacted by Otros Mundos, a local sustainability organization, to design and build three different water collection systems in Chiapas, Mexico. The first location is an appropriate technology demonstration house in San Cristobal de las Casas, the other two systems are in a rural indigenous community. are in a rural indigenous community. )
FAST method for shipping outside of Canada:FAST + (Directions from Western University: https://www.uwo.ca/finance/procurement/customs/exporting_goods.html)
Making your own window cleaner + (Dirty windows make it hard to appreciate the wonderful world outside. Fortunately, there are various ways to make your own window cleaner to fix this problem in a jiffy (just add elbow grease!).)
Low-cost Assistive Technologies for Disabled People Using Open-Source Hardware and Software: A Systematic Literature Review + (Disabled People deal with a series of barr … Disabled People deal with a series of barriers that limit their inclusion, empowerment, wellbeing, and role in society with a special emphasis in low and medium-income countries. One of these barriers is concerning the accessibility and affordability of assistive technologies (ATs) that help to enhance the quality of life of these persons. In this context, this systematic literature review (SLR) analyzes and describes how free and open-source hardware (OSHW) and open software (OSS) are employed in the design, development, and deployment of low-cost ATs. In the SLR process, different ATs were analyzed for disabilities such as visual, mobility, upper body, prostheses, hearing & speaking, daily living, and participation in society. The ATs were designed with diverse OSHW and OSS technologies such as Arduino, Raspberry Pi, NVidia Jeston, OpenCV, YOLO, MobileNet, EEG and EMG signal conditioning devices, actuators, and sensors such as ultrasonic, LiDar, or flex. 809 studies were collected and analyzed from the database Web of Science, GitHub, and the specialized journals in OSHW HardwareX and the Journal of Open Hardware during the years 2013-2022. In the first part of the SLR, the bibliometric trends and topic clusters regarding the selected studies are described. Secondly, the ATs identified with open source technologies, e.g., sensor-based or computer vision-based, are described along with a complete state-of-art about these based on each disability recognized. Finally, the issues and challenges to this approach are explored including technical factors, documentation, government policies, and the inclusion of disabled people in open source co-creation. The purpose of this study is to inform practitioners, designers, or stakeholders about low-cost (frugal) ATs with OSHW and OSS, and thus promote their development, accessibility, and affordability, contributing to benefit the community of disabled people.g to benefit the community of disabled people.)
Original environment rehabilitation manual 3.369/Disaster Nursery + (Disaster Nursery: After storms, ship groun … Disaster Nursery: After storms, ship groundings, anchor drops and other disasters, there is often a significant amount of damaged coral and no practical way to re-attach them. In these cases, concerned divers can create a short-term disaster nursery to preserve the coral genetics impacted by the disaster. These nurseries must be able to keep the coral alive long enough to build and deploy the chosen artificial substrate and to activate a Coral Team. A Disaster Nursery is designed hold coral up to a maximum of about one year.Dissolved Oxygen (DO) Test Kit: There are many inexpensive and effective DO test kits on the market. We have found that the Lamotte kit is easy to use, accurate enough, and priced under US$50. Be sure to follow the instructions carefully to get an accurate measurement. Testing DO at the site of the coral table is critical when first setting the table up and on particularly hot or stagnant days, or days following a heavy rainfall. If testing indicates that DO levels are over 4.5 mg/l, it is safe to conduct coral fragmenting and coral table operations.Dry hand dipper and placer: The person at the coral propagation table who handles dry fragmented coral; receiving the frags from the wet hands helper, dipping them into RBF antiseptic, shaking off any water on the fragments (water or antiseptic will prevent the frags from setting into the cement properly), and then placing them in the correct orientation in the wet cement in medicine cup molds. Some high-speed tables operate with 2 dry hand dippers and placers.erate with 2 dry hand dippers and placers.)
Disaster preparedness + (Disaster preparedness is the set of actions and measures an individual, family, household, group or an organization takes in order to prevent and mitigate a disaster or an emergency. Disasters can be classified according to their cause:)