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IND

An Investigational New Drug (IND) application is a formal request submitted to the (FDA) by a sponsor, such as a pharmaceutical company or researcher, to obtain permission for testing an unapproved drug or biological product in human s. The process mandates submission of preclinical data demonstrating the product's safety in animal studies, detailed manufacturing information to ensure quality and consistency, and proposed clinical trial protocols outlining study design, dosing, and risk mitigation strategies. The IND framework, established under the Federal Food, Drug, and Cosmetic Act as amended by the Kefauver-Harris Amendments of 1962, prioritizes by requiring evidence that the drug is reasonably safe for initial human testing before Phase 1 trials can commence. Sponsors must also commit to procedures and oversight for ethical conduct. The FDA reviews submissions within 30 days, issuing a clinical hold if deficiencies pose unacceptable risks, such as inadequate data or potential ; otherwise, trials may proceed unless later issues arise. Types of INDs include commercial applications for market-bound products, investigator-initiated INDs for academic or non-commercial studies, and emergency INDs for urgent, life-threatening situations bypassing standard timelines. This regulatory mechanism has facilitated the advancement of thousands of therapies since its , underpinning the transition from laboratory discovery to approved treatments while enforcing rigorous evidence-based safeguards against . requirements emphasize causal between preclinical findings and applicability, with ongoing of adverse events to enable real-time . Although the process demands substantial investment in data generation—often spanning , , and biodistribution studies—it remains a cornerstone of causal realism in , ensuring interventions are grounded in empirical validation rather than speculation.

Places

Geographic Locations

India, officially the Republic of , is a country in with the alpha-3 code IND. Covering approximately 3.287 million square kilometers, it is the seventh-largest country by land area and the most populous, with over 1.4 billion people as of 2023. Bordered by to the west, , , and to the north, and to the east, and the to the south, its geography includes the Himalayan mountain range, the , the , and diverse coastal regions along the and . Indiana is a state in the , historically abbreviated as IND or Ind. in postal and traditional usage prior to 1963, when the standardized it to IN to avoid confusion with and other terms. Spanning 94,321 square kilometers, it ranks 38th in area among U.S. states and had a population of about 6.8 million in 2020. Geographically, Indiana features flat to gently rolling plains in the north transitioning to more varied terrain in the south, including the valley, lowlands, and forested hills of ; it borders to the northwest, providing access to shipping. The state capital is , located centrally.

Airports and Codes

, designated by the IATA code IND, ICAO code KIND, and FAA location identifier IND, serves as the principal airport for , , and the surrounding region. Located 7 miles (11 km) southwest of , it operates under the management of the and accommodates commercial passenger flights, cargo operations (including a major hub), and . The facility features three runways: 05L/23R (9,000 ft), 05R/23L (10,750 ft), and 14/32 (11,200 ft), with the longest supporting large . Elevation at the airport is 797 feet (243 m) above . In 2023, the airport handled approximately 9.5 million passengers, reflecting its role as a medium-hub facility with nonstop service to over 50 domestic and international destinations via major carriers such as , , , and Southwest. Daily operations include around 145 departures, facilitating connectivity across the , , , and the . Cargo throughput is significant, bolstered by its status as the second-largest hub globally after . The IND code is uniquely assigned to this airport by the (IATA) for commercial scheduling and ticketing purposes, while the ICAO and FAA identifiers support international and domestic regulatory functions, respectively. No other airports utilize the IND designation, ensuring unambiguous global reference. The airport has received accolades, including recognition as the Best Airport in by for multiple years, attributed to its facilities like the award-winning civilian military museum and efficient passenger processing.

Transportation

Rail and Subway Systems

The Independent Subway System (IND), constructed and operated by the City of , represented a municipal effort to address overcrowding on the privately held Interborough Rapid Transit (IRT) and Brooklyn-Manhattan Transit (BMT) lines through publicly funded expansion. Planning originated in the early 1920s amid capacity shortages, culminating in the Board of Transportation's adoption of a route plan on December 9, 1924, emphasizing trunk lines along Eighth and Sixth Avenues with provisions for express-local operations. Construction commenced on April 3, 1925, for the Eighth Avenue Line, reflecting a design philosophy prioritizing higher throughput via standardized infrastructure. The IND's inaugural segment, the Eighth Avenue Line, opened on September 10, 1932, extending 17.1 miles from Inwood-207th Street in to Chambers Street, with immediate extensions planned to Brooklyn's Jay Street via the Ninth Avenue Elevated. IND featured cars 60 feet 6 inches long and 9 feet 8 inches wide—dimensions enabling 10-car consists up to 600 feet, contrasting with IRT's narrower 8 feet 9 inches width and 51-foot lengths, thus supporting greater passenger volumes on B Division tracks. Platforms were engineered for these longer trains, and the system incorporated dual express-local tracks on major corridors to enhance efficiency. Key subsequent lines included the Queens Boulevard Line, operational from August 18, 1933, linking to in via 42nd Street and extensions to 169th Street by April 24, 1937; the Line, opened December 15, 1940, utilizing former elevated rights-of-way south of 47th Street; and the Brooklyn-Queens Crosstown Line, providing G service across both boroughs. Further developments encompassed the Fulton Street Line extension to Euclid Avenue on November 29, 1948, and the Rockaway Beach Line conversion, completed June 28, 1956, after acquisition from the . These routes formed an interconnected network emphasizing radial and crosstown connectivity, with total initial mileage exceeding 57 route miles by 1933. Post-1940 unification under the Board of Transportation, IND infrastructure integrated into the unified subway's B Division, retaining distinct features like wider clearances for through-routing with former BMT lines while facilitating higher-frequency services on lines such as A, C, E (Eighth Avenue), B, D, F ( and branches), and G (Crosstown). The system's emphasis on future-proofing—evident in aborted Second System plans for additional trunks like Second Avenue—underpinned its role in alleviating Manhattan-centric congestion, though financial and wartime delays curtailed full realization.

Medicine and Pharmaceuticals

Investigational New Drug

An Investigational New Drug (IND) application is a regulatory submission to the (FDA) seeking authorization to administer an unapproved drug or biological product to subjects in clinical investigations, prior to interstate shipment or use. This process ensures that sufficient preclinical data demonstrate a reasonable basis for proceeding to testing, mitigating risks of while allowing evaluation of and . The IND framework applies to new chemical entities, biologics, or approved drugs proposed for new indications, routes, dosages, or patient populations. The IND regulatory pathway originated with the Kefauver-Harris Amendments to the Federal Food, Drug, and Cosmetic Act in 1962, enacted in response to the disaster that caused thousands of birth defects, which underscored the need for pre-market proof of drug and efficacy beyond manufacturer claims. Prior regulations under the 1938 Act focused on demonstrations for market approval but lacked structured oversight of investigational use; the 1962 changes formalized the IND process under 21 CFR Part 312, requiring sponsors to submit detailed applications and await FDA review before initiating trials. This shifted from self-regulation by industry to federal scrutiny, emphasizing , institutional review boards (IRBs), and phased clinical studies (Phase 1 for , Phase 2 for efficacy signals, Phase 3 for confirmation). Sponsors—typically pharmaceutical companies for commercial INDs or individual investigators for research INDs—must file the application at least 30 days before trial initiation, during which the FDA reviews for clinical hold risks such as inadequate / data or deficient protocols. Required components include: preclinical studies showing animal safety and ; chemistry, manufacturing, and controls () data ensuring product quality; detailed protocols outlining study design, endpoints, and statistical plans; qualifications via FDA Form 1572; and environmental assessments if applicable. Submissions occur electronically in eCTD format since 2017, with serial numbering for amendments and annual reports mandatory thereafter. INDs fall into categories: commercial for industry-led toward approval; investigator-initiated for or non-commercial research on unapproved uses; and treatment INDs () for patients with serious conditions lacking alternatives, allowing compassionate use outside trials under specific criteria. FDA non-approval of an IND does not preclude resubmission with additional data, but holds can delay progress; between 2010 and 2020, clinical holds affected about 10-15% of submissions, often due to impurities or insufficient justification for pediatric extrapolation. Post-IND, sponsors report adverse events promptly, with Phase 1 trials typically involving 20-100 healthy volunteers to assess dosing and side effects. This system balances innovation with public protection, though critics note delays averaging 30 months from IND to filing, potentially hindering access to therapies.

Science and Technology

Nuclear Technology

An (IND), also known as a clandestine or fission bomb, is an incorporating —such as or highly —to achieve a , distinct from conventional explosives or radiological dispersal devices like dirty bombs. Unlike state-built , an IND relies on non-standard, improvised components and methods, potentially derived from stolen nuclear warheads, salvaged parts, or crudely assembled from acquired . The term gained prominence in U.S. contexts post-2001, highlighting risks, though successful fabrication demands rare expertise in , precise machining for criticality, and access to weapons-grade isotopes, barriers that render non-state production exceedingly improbable without state sponsorship. Technical feasibility hinges on achieving supercritical mass: for , approximately 52 kilograms in a basic spherical configuration, or less with (around 10 kilograms) aided by neutron reflectors like , but inefficiencies in improvised designs often yield yields below 10 kilotons , far short of optimized bombs exceeding 100 kilotons. Assembly requires shielding against premature detonation from or alpha-neutron reactions, plus a reliable initiator—challenges compounded by the need for high explosives to compress the core implosively, a process prone to fizzle yields (sub-kiloton failures) without advanced diagnostics. Historical precedents include theoretical designs like the "" initiator from the , but modern IND simulations by agencies like underscore that even with , amateur efforts typically fail due to impurities, geometric flaws, or insufficient compression. Upon detonation, an IND releases energy via , , prompt (neutrons and gamma rays), and delayed fallout from induced products, with effects scaling by : a 10-kiloton could vaporize structures within 0.5 kilometers, cause third-degree burns up to 3 kilometers, and expose survivors to lethal radiation doses exceeding 500 in the first hour. Fallout patterns depend on ground vs. , generating novel radioisotopes from pulverized soil, unlike pure bombs, with plume dispersion modeled by tools like the U.S. Department of Homeland Security's IND response frameworks predicting tens of thousands of casualties in urban settings. Countermeasures emphasize prevention through material safeguards under IAEA protocols, detection via portal monitors for , and response via evacuation, , and potassium distribution, though official assessments from the CDC and FEMA note that IND threats, while catastrophic if realized, pale against conventional risks due to controls since the 1970s Nuclear Non-Proliferation Treaty.

Astronomy and Physics

Indus is a faint constellation in the , officially abbreviated as Ind by the (IAU). It spans 294 square degrees, ranking 49th in size among the 88 modern constellations, and is visible primarily from latitudes south of +15° N. The constellation lies between 20h 20m to 22h 40m and declination -50° to -75°, bordering Grus to the north, and to the south, Pavo to the east, and and to the west. The constellation was introduced in the late by Dutch celestial cartographer , based on observations made during voyages by navigators and in the 1590s. Plancius depicted Indus on a celestial globe in 1598, portraying it as a figure representing a native inhabitant—possibly from the or the —holding a or . It first appeared in printed form in Johann Bayer's 1603 star atlas Uranometria, where it solidified its place among the southern constellations unknown to astronomers. Unlike prominent northern patterns, Indus lacks mythological associations from and serves mainly as a modern for southern sky observers. Indus contains no stars brighter than third magnitude and hosts few notable deep-sky objects observable with amateur equipment, such as the globular cluster NGC 6752 in nearby Pavo but spilling into its border, or faint galaxies like IC 5152. Its brightest star, Alpha Indi (also called The Persian), is an orange giant of 3.11, located approximately 101 light-years away with a 83 times that of . Beta Indi, at magnitude 3.65 and about 600 light-years distant, is another evolved orange giant, while Delta Indi is a white main-sequence star of magnitude 4.4 in a wide binary system. The constellation includes two confirmed hosts: Psi Indi, with a Jupiter-mass planet, and , part of a triple-star system featuring a companion (Epsilon Indi B) and, as of 2024, a directly imaged (Epsilon Indi Ab) orbiting at 40 astronomical units, observed by the with a mass estimated at 6 masses and temperature around 1,400 K.

Computing and Data

In numerical computing, particularly within the Microsoft Visual C++ runtime library, the notation "-1.#IND" (or variants like "1.#IND") denotes an indeterminate value resulting from undefined floating-point operations, such as in certain contexts or square roots of negative numbers, which map to the standard's Not-a-Number (). This printing convention, unique to Microsoft's implementation, distinguishes indeterminate forms from other special values like ("1.#INF"), aiding by explicitly signaling computational anomalies rather than generic NaN outputs seen in other systems. In , a subfield of , IND abbreviates "indistinguishability," forming the basis for security definitions like IND-CPA (indistinguishability under ), where an scheme is secure if an adversary cannot distinguish ciphertexts of two chosen plaintexts with non-negligible advantage, even after querying an oracle. Introduced in foundational works by and Micali in the early 1980s, this computational indistinguishability model underpins the security proofs for systems like RSA-OAEP and , ensuring confidentiality against polynomial-time attackers without relying on information-theoretic secrecy. Less commonly, IND refers to Inverse Neighbor Discovery in networking protocols, an extension to standard Neighbor Discovery that enables a to query which routers list it as a neighbor, facilitating reverse mapping in large-scale or environments. This protocol, defined in 7421 published in 2015 by the IETF, addresses limitations in forward-only for efficient data plane management.

Mathematics

Algebraic Structures

Ind-schemes and ind-groups represent extensions of classical algebraic structures to infinite-dimensional settings via filtered colimits, known as inductive limits, in the categories of schemes and algebraic groups, respectively. These structures formalize objects that lack finite presentation but retain algebraic properties, enabling the study of automorphism groups and other infinite phenomena in . Introduced to address limitations of finite-type varieties, ind-structures preserve operations like group multiplication or scheme morphisms while accommodating directed systems of embeddings. An ind-scheme is a contravariant functor from the category of affine schemes (with the Zariski or étale topology) to sets, representable as a colimit of a filtered diagram of schemes connected by closed immersions. This ensures that ind-schemes behave like schemes locally but globally capture infinite unions or completions, such as the infinite affine line as a colimit of finite segments. Coherent sheaves on ind-schemes are defined via pullback from the approximating schemes, supporting derived categories and intersection theory. For instance, the affine Grassmannian in loop groups can be realized as an ind-scheme, facilitating computations in geometric representation theory. Ind-groups, pioneered by I. R. Shafarevich in , consist of inductive limits of algebraic groups over directed posets of closed subgroup inclusions, endowing them with a compatible group structure and tangent . Unlike finite-dimensional algebraic groups, ind-groups need not be finitely generated but admit descriptions via colimits of coordinate rings. Shafarevich applied this to the of \mathbb{A}^n (for n \geq 2), which forms an ind-group generated by affine and elementary transformations, exhibiting wild behavior absent in dimension 1. These structures also model Cremona groups and birational transformation groups, where finite-type approximations reveal generating sets and relations. Lie algebras of ind-groups inherit infinite-dimensional extensions, aiding infinitesimal analysis despite the absence of exponential maps in general.

Culture and Society

Psychological Dimensions

(IND), in , refers to a value orientation emphasizing personal independence, self-reliance, and the prioritization of individual goals over group obligations. This construct, often contrasted with collectivism (COL), shapes psychological processes such as , where individuals in IND-oriented cultures view the self as autonomous and distinct from others, fostering an independent self-construal. Empirical studies, including surveys, indicate that IND correlates with higher emphasis on personal achievement and uniqueness, as measured by scales like the Individualism-Collectivism Scale (INDCOL), which distinguishes horizontal (equality-focused) and vertical (hierarchy-accepting) variants. Cognitively, IND influences attribution styles and , with individuals attributing to internal factors like effort rather than external , leading to analytic thinking patterns over holistic ones observed in contexts. Motivationally, IND promotes intrinsic drives tied to , as evidenced by higher rates of entrepreneurial behavior and in IND-dominant societies, though this can manifest as reduced and greater for . Emotionally, IND cultures report more frequent experiences of and guilt linked to personal failings, but lower relational , contributing to patterns of that prioritize over suppression for group sake. On outcomes, IND orientations are associated with elevated risks of and psychological distress, including higher rates in longitudinal multinational data, potentially due to weaker networks and emphasis on over interdependence. Conversely, IND fosters through enhanced and problem-solving , as seen in studies linking it to adaptive in individualistic samples versus collectivistic Eastern ones. These effects vary by horizontal versus vertical subtypes, with horizontal IND promoting egalitarian self-expression and vertical IND aligning with competitive achievement, influencing interpersonal dynamics like reduced but increased intergroup bias in primed experiments. Overall, while IND drives personal , its psychological costs include diminished communal buffering against , underscoring trade-offs in cultural adaptations.

Organizations and Business

Industry and Commercial Uses

In the pharmaceutical industry, the Investigational New Drug (IND) application serves as the primary regulatory mechanism for companies to initiate human clinical trials of novel therapeutics, enabling the transition from preclinical research to potential commercialization. Commercial INDs, distinct from research INDs, are typically filed by corporate sponsors such as biotechnology firms or pharmaceutical manufacturers with the intent to gather data supporting eventual marketing approval via a New Drug Application (NDA). These applications must include comprehensive preclinical data, manufacturing information, and proposed clinical protocols to demonstrate the drug's safety for initial human testing, with the U.S. Food and Drug Administration (FDA) reviewing submissions within 30 days to allow trials to proceed or impose a clinical hold if risks are deemed unacceptable. The commercial utility of INDs lies in their role as a gateway for monetizing drug candidates, as successful Phase I-III trials under an active IND can lead to FDA approval and entry, generating billions in annual revenue for approved products. For instance, sponsors must comply with (GMP) standards for drug production and ensure ongoing reporting, which facilitates scalable manufacturing and positions the product for broad commercial distribution upon approval. In 2023, the FDA received over 1,000 commercial IND submissions, reflecting the high volume of industry investment in pipeline development amid a global valued at approximately $1.5 trillion. This process underscores causal dependencies in drug commercialization, where empirical and data from IND-enabled s directly inform regulatory decisions and viability, often requiring iterative amendments to protocols based on emerging trial results. Beyond initial filings, INDs support programs, such as Treatment INDs, allowing commercial distribution of investigational drugs to patients with serious conditions outside when no alternatives exist, thereby bridging gaps in revenue generation during late-stage development. Industry stakeholders, including contract organizations (CROs), leverage IND frameworks to outsource management, optimizing costs and accelerating timelines—critical for maintaining competitive edges in patent-protected markets. However, challenges persist, including high rates (over 90% of INDs fail to reach approval) due to insufficient or unforeseen toxicities, which demand rigorous first-principles validation of biological mechanisms prior to large-scale investment. These dynamics highlight the IND's centrality to risk-managed innovation in commercial biopharma, where directly correlates with financial outcomes.

Other Uses

Miscellaneous Acronyms

In transportation, IND designates the , a municipal network constructed during the 1930s as the third major subway system, distinct from the earlier private Interborough Rapid Transit (IRT) and Brooklyn Rapid Transit (BRT) lines; it opened on September 10, 1932, with the Eighth Avenue Line and expanded to include the Sixth Avenue and Queens Boulevard lines by 1940. In aviation, IND serves as the IATA code for , the primary international airport serving , , handling over 5 million passengers annually as of 2023 and featuring two runways exceeding 10,000 feet in length. In international sports governance, IND is the three-letter country code assigned by the (IOC) to , used in official Olympic results, team designations, and events since the early ; for instance, competed under IND at the 2024 Paris Olympics, securing six medals. In and , IND abbreviates "indicative," referring to the verb mood employed to convey factual statements, questions, or assertions of reality, as opposed to subjunctive or imperative moods; it predominates in declarative sentences across , such as "The experiment succeeded" in English indicative form. In U.S. regulatory , IND denotes an application, a submission to the (FDA) required prior to initiating human clinical trials for novel therapeutics; enacted under the Federal Food, Drug, and Cosmetic Act of 1938 and amended by the Kefauver-Harris Amendment of 1962, it mandates preclinical safety data and has processed over 1,000 submissions annually in recent years.

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