Breathalyzer® tests measure blood alcohol content based on the amount of alcohol in a person’s breath. They are used by law enforcement agencies and are also available for consumer use. The first Breathalyzer® test was invented by Dr. Robert Borkenstein in 1954. Consumer versions exist but are of lower quality. Certain chemicals can interfere with […]
A carbon footprint test calculates the amount of carbon an individual, household, business or organization emits directly or indirectly into the atmosphere. It is important for those interested in environmental issues to take the test to learn how they are contributing to global warming and take effective action to reduce their impact. Non-renewable resources, transportation, […]
The dexamethasone suppression test diagnoses Cushing’s syndrome, caused by excess cortisol production. The test measures dexamethasone’s ability to suppress cortisol production, with a low-dose test used for diagnosis and a high-dose test for pinpointing the cause. The test involves blood and urine samples and has minimal risk. Abnormal cortisol levels can have different causes, so […]
Hardness tests evaluate a material’s resistance to bending, scratching, abrasion, or cutting and can be conducted in various ways depending on the material. The Mohs scale is used in geology to evaluate scratch resistance, while the Rockwell and Vickers tests provide specific numerical data. The scleroscope test measures hardness in terms of elasticity. Converting results […]
When suspected of drink driving, police may administer three types of tests: Field Sobriety Test, Breathalyzer® test, urine test, or blood test. Refusal to take a test can lead to penalties and may be used as evidence in trial. Blood tests are mandatory after arrest due to implied consent laws. A drink driving (DUI) test […]
Infertility tests determine why a woman cannot get pregnant or why a man cannot impregnate a woman. Procedures include physical exams, blood tests, ultrasounds, and laparoscopy. Infertility insurance can help defray costs. The purpose of an infertility test is to determine why a woman is unable to get pregnant or why a man is unable […]
A product test engineer evaluates products against set standards, develops test procedures, and determines acceptable production test platforms and equipment. They must be detail-oriented, organized, and have good communication skills. They work closely with multiple engineering teams to provide technical support and reduce production costs. They play a crucial role in establishing quality and correcting […]
A lie detector test measures a person’s physiological responses to questions to detect deception. It records breathing, sweating, and heart rate, and is used by law enforcement and employers. However, it can be manipulated and lead to erroneous results due to anxiety or subjective interpretation. A lie detector test, also called a polygraph test, is […]
Physical evidence at a crime scene provides valuable clues. Evidence technology, such as cameras and fingerprint equipment, helps document and analyze evidence. Investigators look for hair, fibers, and tire marks, and use alternate light sources and fingerprint technology. Forensic laboratories use scientific evidence technology to test samples, including DNA analysis and material testing. Trained observation […]
Ketosis tests check for ketones produced by the body when burning fat for energy instead of stored sugars. It can be done at home using test strips or in a lab with a blood sample. Ketosis is often diet-induced and can be dangerous for some medical conditions, but it is deliberately induced for some weight-loss […]
The fetal fibronectin test detects the presence of a protein in cervical secretions, indicating the potential for premature birth. It requires a cervical swab and results are usually available within 24 hours. Treatment options may include bed rest, medication, or steroid injections to prevent premature birth. A fetal fibronectin test is done to determine if […]
The HPV DNA test is used to check for high-risk types of human papillomavirus (HPV) that can lead to cervical cancer. It is performed on women after an abnormal Pap smear. Men can also contract HPV, but are not given the test. Treatment is available for cervical cancer, cell changes, and genital warts, and the […]
Acceptance testing is the final stage of testing before a system is delivered to a live environment. User Acceptance Testing (UAT) is performed by the end user, while Factory Acceptance Testing (FAT) is performed by the vendor. Test cases are individually documented scenarios with pass or fail results, and payment may depend on achieving a […]
A test development engineer performs quality assurance testing on software and hardware, troubleshoots and repairs bugs, and may determine company policies and practices related to testing. They collaborate with other employees, departments, and outside organizations and may supervise and train other employees. A test development engineer is a supporting member of an engineering department or […]
Psychological testing assesses an individual’s abilities, behavior, and emotions through responses to interviews or paper tests, including IQ, aptitude, personality, and neuropsychological tests. These tests follow guidelines to ensure equal opportunity and are used in various fields, such as employment screening and brain injury evaluation. Psychological testing, also known as psychometrics, is a broad term […]
The Rockwell hardness test measures the surface strength of materials by indenting them with different weights and measuring the depth of the indentation. The test is quick and convenient, and the measurement is based on small units. Other methods exist, but Rockwell is more popular. The Rockwell hardness test is a way to measure the […]
The urea breath test detects the Helicobacter pylori bacterium, which can cause stomach ulcers, gastritis, and gastric cancers. The test involves analyzing breath samples for carbon dioxide after the patient swallows a capsule or solution containing carbon isotopes. Treatment for a positive result usually involves antibiotics. A urea breath test, sometimes called a carbon urea […]
Nonparametric tests do not assume a normal distribution and are more robust, require smaller samples, and can be applied with fewer assumptions. They are effective for questions involving frequencies and proportions. Nonparametric tests avoid the assumption of normality and examine data by categorizing or sorting it. A common nonparametric test is the Chi-squared test, which […]
The Huhner test evaluates the compatibility of sperm and cervical mucus, which can affect up to 8% of infertility cases. The test examines the clarity, viscosity, pH, and presence of other cells in the mucus. Hormonal medications or artificial insemination may be recommended if the mucus is incompatible. The Huhner test is a type of […]
To ensure you’re getting your money’s worth from your internet service provider, use websites like SpeedTest, AuditMyPC, and CNET Bandwidth Meter Speed Test to test your connection speed. Run multiple tests at different times of day and use different websites for accuracy. Factors like distance from the DSLAM and rogue software can affect speed. Contact […]
