369 projects whose affiliated fair was here, most recently in 2026.
ISEF records a state or province for some finalists and not others, so these counts do not add up to the country total.
369 projects · showing 331–360
ISEF · 2015
The main purpose of the present research is contributing to the area of number theory. It is focused on the study of properties observed in the set of natural numbers when applied to the cub…
ISEF · 2015
The existence of the prime numbers has being documented since 300 AD when mathematicians like Euclid found this strange and beautiful numbers. If finding a prime number on the naturals is aw…
ISEF · 2015
The purpose of this investigation was to find a natural process to restore water quality parameters when chlorine and pH levels were altered. Using the common household plant Epipremnum aure…
ISEF · 2015
Current passive water heaters are considered effective, but not perfect. Progress can always be continued, by varying small details. Improvements differ in cost, but the ones that surely wil…
ISEF · 2015
This research was done in order to discover whether the use of electricity in plants would achieve a favorable result. The hypothesis consisted in proving that by applying electricity to the…
ISEF · 2015
Biomedical Engineering
People commonly use the leaves extracts of MSN plants as a topical gel to cure "Herpes zoster", a viral disease. They say that this plant can inhibit the growth of this virus. The purpose of…
ISEF · 2015
Energy: Sustainable Materials and Design
There are several types of polymers with chemical additives. These polymers have different molecular structures and different practical uses. The purpose of this research was to determine th…
ISEF · 2015
People are usually aware of their high stress levels only when it is observed by a physician by means of blood pressure measurements or other tests. By this time, stress has turned into a me…
ISEF · 2014
Energy: Physical
This investigation proposes to create a model of a water solar heater which maximizes the usage of available solar radiation in order to reach higher water temperatures. The problem was whic…
ISEF · 2014
Plant Sciences
Biodiesel is a type of alternative environmental fuel that can be made from certain types of vegetable oils or animal fat which is normally used as a replacement for diesel. In this study, b…
ISEF · 2014
Robotics and Intelligent Machines
Pythagorean triples are derived from the Pythagorean Theorem, which states that three positive integer numbers a, b, c, representing the lengths of the sides and hypotenuse of a right triang…
ISEF · 2014
Materials Science
The researcher intends to apply the combination of different types of mathematical concepts such as Linear Algebra, Statistics and Game Theory in economic situations of real life. Game theor…
ISEF · 2014
Materials Science
This research focuses on refining the formula of James Stirling that gives an approximation of the actual value of a factorial (Striling, 1730). A wide interval was selected for the value of…
ISEF · 2014
Materials Science
Biogeochemistry is the study of the relationship between the chemical processes of earth, and life. Understanding these chemical processes also provide further information related to environ…
ISEF · 2014
Engineering Mechanics
A region is arid when it is dry, and frequently infertile. Soil can be arid and dry due to evapotranspiration. Evapotranspiration is the combination of water evaporation from the soil and tr…
ISEF · 2014
Chemistry
Amyloid fibrils are conformations of misfolded proteins with a stable ß-sheet structure. They are believed to be the main cause of neurodegenerative disorders such as Alzheimer’s and Parkins…
ISEF · 2014
Mathematics
Inflammatory Breast Cancer (IBC) has been the most lethal form of breast cancer. Nearly 40% of women with IBC stage III, and 11% in stage IV survive at least 5 years after diagnosis. This st…
ISEF · 2014
Mathematics
This research intends to find a natural, economical, and effective method to treat otitis externa without secondary effects. The extracts of Kalanchoe pinnata leaves have been commonly used…
ISEF · 2014
Robotics and Intelligent Machines
This project has the purpose of finding the amount of average steps that will solve a 3D labyrinth, with multiple floors, using the stochastic method (random process). The initial idea was t…
ISEF · 2014
Environmental Engineering
Enzymes used in the de-inking process detach ink particles from the fibers by partially hydrolyzing the cellulose fibers on the fiber/ink inter-bonding regions. The purpose of this experimen…
ISEF · 2014
Mathematics
The objective of the investigation was to determine if there is an underestimation of the cases of leptospirosis in relation to dengue in Puerto Rico. The need of the availability of the Mic…
ISEF · 2014
Energy: Chemical
In Puerto Rico, geological threats are not taken care of in the context of prevention and disaster management. The purpose of this investigation is to study, design and develop an early warn…
ISEF · 2014
Mathematics
Currently, all commercial treatments to control bacterial populations in milk as well as liquid foods are based on extremely expensive thermal processes. The objective of this research was t…
ISEF · 2014
Environmental Engineering
The growth of population has created problems like increase of fCO2, food shortage and contamination to our water resources. Would it be possible to create a self-sustaining small portable 7…
ISEF · 2014
Mathematics
Used car tires are often stockpiled, due to lack of effective recycling systems, collecting water and providing a prolific breeding site for the Aedes aegypti mosquito, a vector for several…
ISEF · 2014
Engineering Mechanics
Soil contamination by hydrocarbons is a common occurrence in developed countries, showing damaging effects on the environment. There are microorganisms that can degrade toxic substances, red…
ISEF · 2014
Physics and Astronomy
Food shortage is a worldwide problem and it is important to learn how to use the best methods to culture plants for food. Can marine algae be used as fertilizers to increase and strengthen t…
ISEF · 2014
Mathematics
Newborn screening is a vital process that defines the course that a baby’s life could take. Identifying metabolic diseases at early stages gives the opportunity of early treatment, making th…
ISEF · 2014
Engineering Mechanics
Due to the high consumption of gasoline around the world, it becomes a priority to look for alternatives that can reduce its consumption. The research’s purpose is to reduce gasoline consump…
ISEF · 2014
Robotics and Intelligent Machines
Every single branch of science has its origins in math. Of all the mathematical concepts, exponents constitute one of the most fundamental and useful tools. This purpose of this project is t…