All articles starting with I
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Impact of the Asian giant hornet on beekeeping and hive defenses
The Asian giant hornet (Vespa mandarinia) can destroy whole honey bee colonies within hours, so beekeepers protect hives with entrance screens and traps instead of relying on the bees' defenses.
Impact of the COVID-19 lockdowns on education
Impact of the COVID-19 lockdowns on education: global school closures from 2020 affecting over 1.6 billion learners, causing measured learning deficits (Cohen's d = −0.14), unequal losses, and projected long-run economic costs.
Impact of the COVID-19 pandemic on cinema
The COVID-19 pandemic closed most of the world's movie theaters in 2020, costing about $50 billion in box office and shortening the theatrical window to about 45 days.
Impact of the COVID-19 pandemic on multisport events
The COVID-19 pandemic forced the Tokyo 2020 Olympics to 2021 and postponed the World Games, Asian Games, and Universiade, while Beijing 2022 went ahead under biosecurity.
Impact of the COVID-19 pandemic on record labels
The impact of COVID-19 on record labels was mixed: several independent labels and record stores closed in 2020 and 2021, often for reasons unrelated to the pandemic.
Impact of the COVID-19 pandemic on the environment
The COVID-19 pandemic caused a 6.4% drop in global carbon dioxide emissions in 2020, alongside air quality changes, rising plastic waste, and mostly negative effects on conservation.
Impact of the COVID-19 pandemic on the food industry
COVID-19's impact on the food industry: simultaneous supply and demand shocks to food supply chains, meat plant closures, food-service collapse, transport disruption, and hunger risk from lost income.
Impact of the COVID-19 pandemic on video game industry events
The COVID-19 pandemic canceled video game trade shows including E3 and GDC between 2020 and 2023, shifting game announcements to livestreamed digital showcases like Summer Game Fest.
Impact of the privatisation of British Rail
The impact of the privatization of British Rail, also called rail privatization in the United Kingdom, was contested: passenger growth rose sharply while costs, subsidies, and fares increased.
Impact play
Impact play is a consensual BDSM activity of striking a partner with hands or implements (paddles, floggers, canes) for sensation and power exchange; risks concentrate on head, neck, kidneys, and genitals.
IMPACT study (NCT03831490)
IMPACT (NCT03831490), Study for Improving Maternal, Pregnancy and Child Outcomes: Swedish prospective multicentre cohort by Uppsala University, 2018-2022, 13,000 first-trimester pregnancies, building preeclampsia prediction models and a national biobank.
Impact test
An impact test strikes a material or component with a sudden single load and measures the energy absorbed in fracturing it, gauging toughness and resistance to brittle fracture.
IMPACT Therapeutics (英派药业)
IMPACT Therapeutics (英派药业) is a Chinese biotechnology company, founded in 2009, that develops precision anti-cancer therapies based on synthetic lethality; its PARP inhibitor senaparib was approved in China in 2025.
IMPACT trial (NCT07420426)
IMPACT (NCT07420426, IMPACT2025) is a University of Hong Kong randomized trial testing 9 weeks of automated instant message-delivered acceptance and commitment therapy against general mental health messages for neuropsychiatric symptoms in adults aged 50+ with mild cognitive impairment; 160 participants, recruiting, completion expected December 2026.
Impact wear
Impact wear is wear of a solid surface caused by percussion, that is, repetitive dynamic contact by another body, driven mainly by surface fatigue and plastic deformation.
Impact welding
Impact welding is a solid-state joining method that bonds similar or dissimilar metals by driving a flyer plate into a target at several hundred meters per second.
Impact wrench
An impact wrench, also called an impact gun, is a power tool that tightens or loosens threaded fasteners by delivering torque in short hammer blows through a square socket drive.
Impact Wrestling
Impact Wrestling, also known as TNA or Total Nonstop Action, is an American professional wrestling promotion founded in 2002 that used the Impact name from 2011 to 2024.
Impact-based warnings
Impact-based warnings describe the expected consequences of weather events and the actions people should take, rather than stating only hazard characteristics such as wind speed or rainfall depth.
Impact, N-terminal
Impact, N-terminal (Impact_N) is an InterPro/Pfam protein domain annotation for the IMPACT family of RWD-domain proteins; in human IMPACT (Q9P2X3) it is mapped to residues 182-289, next to a ribosomal protein uS5 domain 2-type region.
Impacted cerumen
Impacted cerumen (earwax blockage, ICD-11 AA42, ICD-10 H61.2): wax accumulation causing symptoms or blocking ear examination; affects 10% of children, 5% of adults; treated with cerumenolytics, irrigation, or manual removal.
Impacted teeth
Impacted teeth (dental impaction, ICD-11 DA07.8) are teeth unable to erupt properly, most often lower third molars; about 37% of people have an impacted third molar, with removal recommended only when pathology exists.
Impacted wisdom teeth
Impacted wisdom teeth are third molars blocked by bone or soft tissue from fully erupting, usually ages 18-24. Also third molar impaction; causes pericoronitis, caries, cysts; removal versus watchful waiting debated.
IMPACTonIMT trial
IMPACTonIMT (NCT01291641) trial: randomized Korean-Chinese study of probucol, or probucol plus cilostazol, added to statins in coronary artery disease; no carotid IMT benefit at 3 years.
Impacts of tourism
Impacts of tourism are the economic, socio-cultural, and environmental changes that visitor activity produces in destination economies and communities, spanning jobs, growth, leakage, emissions, and housing costs.
ImPAcTT trial
ImPAcTT (Improving Palliative Care Access Through Technology), NCT04969484, is a University of Utah telehealth palliative care pilot for nursing home residents led by Caroline Stephens; non-randomized, 3 nursing homes, enrollment 81, status suspended after COVID-19 disruptions. Distinct from the IMPACTT team-based RCT and the Australian IMPART trial.
Impaired abstract thinking
Impaired abstract thinking (ICD-11 MB21.6) is a cognitive clinical sign of concrete, non-figurative reasoning, assessed in the mental status examination and WAIS Similarities, seen in dementias and schizophrenia.
Impaired fasting glucose
Impaired fasting glucose (IFG), impaired fasting glycaemia, is prediabetes defined by fasting plasma glucose of 100–125 mg/dL (ADA) or 6.1–6.9 mmol/L (WHO), introduced in 1997, driven by hepatic insulin resistance.
Impaired glucose tolerance
Impaired glucose tolerance (IGT), a prediabetes state defined by 2-hour plasma glucose 140–199 mg/dL on a 75-g OGTT; risk factor for type 2 diabetes and cardiovascular disease; preventable by lifestyle intervention or metformin.
Impairment (accounting)
Impairment is the accounting recognition that an asset's carrying amount exceeds the economic benefit recoverable from it, recorded as a loss under IAS 36 and US GAAP.