SDI Concept Originator Explained
The question asks to identify the individual who first introduced the concept of Selective Dissemination of Information (SDI). Let's explore this concept and its origins.
Understanding Selective Dissemination of Information (SDI)
Selective Dissemination of Information, commonly known as SDI, is a crucial service in information management. It involves:
- Proactively sending information to users based on their specific, pre-defined interests.
- Matching user profiles (representing their information needs) with newly available documents or data.
- Ensuring users receive relevant updates without having to manually search through vast amounts of information.
Think of it like a personalized news feed, but for academic research, industry news, or any specific field, delivered automatically.
H.P. Luhn and the Pioneering SDI Concept
The concept of SDI is widely attributed to Hans Peter Luhn. In the early 1960s (specifically around 1961-1962), Luhn proposed a system designed to automatically match user requirements with newly published documents.
Luhn's vision was revolutionary for its time. He suggested:
- Creating user profiles based on keywords or concepts representing their interests.
- Analyzing incoming documents to extract relevant keywords or concepts.
- Using a mechanism (often involving computing technology) to compare document profiles against user profiles.
- Disseminating documents that matched a user's profile.
His work laid the foundation for modern alert systems and personalized information services.
Evaluating Other Options
While other individuals listed made significant contributions to library science and information management, they are not primarily credited with originating the SDI concept:
- S.R. Ranganathan: A renowned Indian librarian and mathematician, famous for the Five Laws of Library Science and the Colon Classification system.
- G. Bhattacharya: Known for his work in classification and information organization, particularly in faceted classification.
- A.M. Howatson: While potentially involved in information science, his name is not prominently linked to the foundational concept of SDI.
Conclusion on SDI Origin
Based on the history of information science, H.P. Luhn is recognized as the originator of the Selective Dissemination of Information (SDI) concept.
Important Questions from Miscellaneous
- Which of the following relationships is/are not true?
(A). Most probable velocity = $\sqrt{\frac{2RT}{M}}$
(B). PV = $\frac{3}{2}kT$
(C). Compressibility factor Z = $\frac{pV}{nRT}$
(D). Average kinetic energy of gas = $\frac{1}{2}kT$
Choose the correct answer from the options given below - Match List-I with List-II
List-I List-II Electronic Configuration First Ionisation energy (kJ mol$^{-1}$) (A). ns$^2$ (I). 2100 (B). ns$^2$np$^1$ (II). 1400 (C). ns$^2$np$^3$ (III). 800 (D). ns$^2$np$^6$ (IV). 900
Choose the correct answer from the options given below: - The shielding constant of a 2p electron (calculated using Slater's rules) is
- Match List-I with List-II
List-I List-II Spectroscopy Property (A). Raman (I). Polarizability (B). FTIR (II). Dipole Moment (C). UV-Visible (III). Absorbance (D). NMR (IV). Spin
Choose the correct answer from the options given below: - The structure of protein comprises of:
(A). Primary structure of protein is associated with amino acids
(B). Secondary structure of protein is associated to peptides
(C). Tertiary structure of protein is associated with polypeptide chains
(D). Quaternary structure of protein is associated with polypeptide chains
Choose the correct answer from the options given below:
