About Dikhow River:

• It is an important south bank tributary of the Brahmaputra River.
• Course:
  • It originates in the Zunheboto district of Nagaland and enters into the Assam plain through Naginimara of the Sivsagar district of Assam.
  • It flows through the Sivsagar district only to join with the river Brahmaputra at Dikhowmukh on its southern bank within the district.
• The river basin is surrounded by the Brahmaputra River in the north, the Buridihing basin in the east, the Jhanji basin in the west, and the Naga Hills in the south.
• The river leaves more than fifteen abandoned channels at different places in the Assam plain mostly in the form of Ox-bow Lakes.

About Banderol Missile:

• The S8000 Banderol, which translates to "package" or "small parcel," is a cruise missile developed by Russia.
• Launch Platforms:
  • It is primarily an air-launched munition, with the Orion unmanned aerial vehicle (UAV) serving as its primary launch platform.
  • The missile is also integrated for use with the Mi-28 Havoc helicopter.
  • However, reports indicate that Russian has developed a compact ground launcher for the S8000 Banderol, moving beyond its previous airborne carriers.
• Features:
  • The missile's design prioritizes low production costs and simplified manufacturing, incorporating imported foreign components for key systems.
  • Powered by a small, commercially available Chinese turbojet engine, it can travel up to 500 km.
  • Its maximum speed is 620–650 km/h, and its cruising speed is 520–560 km/h.
  • It carries a relatively small high-explosive fragmentation warhead that includes about 50 kilograms of explosives.
  • The missile navigates using inertial and satellite guidance.

About TRAI MyCall:

• It is a mobile application launched by the Telecom Regulatory Authority of India (TRAI).
• It is a citizen-centric digital platform that empowers telecom consumers to share real-time feedback on their voice-calling experience, along with relevant network parameters.
• The feedback provided by consumers is visible to Telecom Service Providers (TSPs) as well as TRAI in an anonymised form.
• This feedback provides valuable insights to TSPs, helping them identify areas where network performance needs improvement and take targeted corrective measures.
• This consumer-driven approach is expected to enhance the overall Quality of Service (QoS).
• The platform also strengthens evidence-based regulatory oversight by enabling TRAI to assess the Quality of Experience (QoE) across telecom networks based on real consumer feedback.
• While network performance is evaluated using technical Quality of Service (QoS) parameters, the QoE perceived by consumers also provides an important perspective on service performance.
• The revamped TRAI MyCall application offers several consumer-friendly features, including:
  • Instant rating of voice calls through a simple 1-5 star feedback system.
  • Reporting of specific issues such as call drops, echo during calls, audio delay, cross connection, voice breaking, one party unable to hear the other, and calls taking too long to connect, which shall be available to the respective service provider for corrective action.
  • Automatic post-call feedback prompts for seamless participation.
  • Rating and feedback history on interactive map.
  • Coverage Test feature to assess signal strength.
  • Multilingual support with Bhashini.

Key Facts about Telecom Regulatory Authority of India (TRAI):

• It is a regulatory body responsible for overseeing the telecommunications industry in India.
• It was established under the Telecom Regulatory Authority of India Act, 1997, passed by Parliament.
• Objectives:
  • To stimulate the growth and development of the telecommunication sector by creating favorable conditions.
  • To provide a fair and transparent environment for telcos.
  • To come up with different regulatory directions/mandates on tariffs, DTH, portability of mobile numbers, and so on.
• Roles and Functions:
  • It sets fair pricing standards for telecom services, such as calls, SMS, and data, to make sure they are affordable to the consumers.
  • TRAI monitors the telcos and makes sure they provide high-quality services when it comes to network coverage, stability, and customer satisfaction/support.
  • It recommends guidelines pertaining to licenses and permissions for new services providers as well as existing ones.
  • TRAI addresses complaints and ensures the companies abide by the consumer protection laws.
  • It ensures that the businesses providing telecommunication services do not engage in deceptive practices, such as false advertising and hidden charges.
  • Also, it oversees that its regulations are implemented by telcos and enforces penalties on them in case of violation of regulations.
  • TRAI fixes and regulates tariffs provided by telcos, which were earlier vested in the Central Government.
  • Composition:
    • It consists of a Chairperson, a maximum of two full-time members, and two part-time
    • Tenure: Members serve for three years or until the age of 65 years, whichever is earlier.
    • Appointments are made by the Central Government.
  • Telecom Disputes Settlement And Appellate Tribunal (TDSAT):
    • The TRAI Act was amended, establishing a TDSAT to take over the adjudicatory and dispute functions from TRAI.
    • TDSAT was set up to adjudicate any dispute between a licensor and a licensee, between two or more service providers, between a service provider and a group of consumers, and to hear and dispose of appeals against any direction, decision, or order of TRAI.

About Madura Island:

• It is an Indonesian island located off the northeast coast of Java.
• It's separated from Java by the narrow Madura Strait.
• It is known as "The Salt Island" because it produces a lot of salt.
• Madura Island has a mostly flat landscape. There are no big mountains or huge changes in height.
• Most of these people are Madurese.
• The Madura people are the third largest people group in Indonesia.
• The main language spoken here is Madurese.
• It is famous for its bull races held each year after the harvest.
• The main towns on the island include Bangkalan in the west, followed by Sampang, Pamekasan, and Sumenep further east.
• Economy:
  • The principal industries are cattle raising and salt panning, the latter a government monopoly.
  • Kapok, copra, and coconut oil are important products, as is teak from forests in the northwest.

About Baba Baidyanath Dham Temple:

• It is a Hindu temple dedicated to Lord Shiva located in Deoghar, Jharkhand.
• It is one of the 12 Jyotirlingas in India.
• This ancient temple has been mentioned in several ancient scriptures, such as Puranas, Vedas, Mahabharata, Ramayana,
• History:
  • The mythological origin of Baidyanath Dham is tied to the legend of King Demon Ravana, who was granted a boon by Lord Shiva to take a sacred Jyotirlinga to his palace in Lanka.
  • But he placed it on the ground in Deoghar, where the Lingam permanently resides.
  • Historical records suggest the temple's original construction in the 8th century by Puran Mal, an ancestor of the Nagavanshi dynasty.
  • Over the centuries, the temple has seen numerous renovations and expansions, reflecting various architectural styles and cultural influences.
  • The current structure is attributed to Raja Man Singh in the 16th century.
  • The temple hosts the famous Shravani Mela, one of the largest annual religious gatherings in India.
• Architecture:
  • The temple showcases the classic Nagara style of North Indian architecture.
  • The main temple is the Baidyanath Jyotirlinga Temple, which houses the lingam of Shiva.
  • The temple is built of stone and has a pyramidal tower that rises to a height of 72 feet.
  • The temple has a simple and elegant design, with a spacious hall, a sanctum, and a vestibule.

About Ethiopia:

• Location: It is a landlocked country in the Horn of Africa.
• It lies entirely within tropical latitudes.
• Bordering Countries: It is bordered by six countries namely Eritrea (North), Djibouti (Northeast), Somalia (East), Kenya (South), South Sudan and Sudan (West).
• Capital City: Addis Ababa
• Geographical Features of Ethiopia
  • Topography: The five major topographic features of the country are the Rift Valley, Western and Eastern Highlands, and Western and Eastern Lowlands.
    • The Denakil Plain, in which a depression known as the Kobar Sink, is found here in its rift valley.
  • Climate: Most of Ethiopia has a tropical climate.
  • Highest Point: Mount Ras Dejen
  • Major Rivers: It has three main rivers in Ethiopia are the Blue Nile, the Omo River, and the Awash River.
  • Lakes: Lake Tana which is located in the northwest of the Ethiopian Highlands.
  • Natural Resources: It mainly consists of metals and other natural resources such as gold, potash, natural gas, copper, and platinum.

About Magnetorheological Fluid:

• It is a fluid that has good magnetic properties.
• MR fluid responds to the magnetic field and changes its properties when a magnetic field is presented.
• Property: These fluid can rapidly change their mechanical properties when exposed to a magnetic field, increasing in apparent viscosity, to the point of becoming a viscoelastic solid.  
• Composition: These fluids contain magnetic micro-sized iron particles, non-magnetic-based fluid, and some additives in order to mitigate sedimentation and agglomeration.
• Carrier fluids: The various carrier fluids used in the preparation of MR fluids are mineral oil, silicon oil, castor oil, soybean oil, kerosene, synthetic oils, honge oil, organic oil, water-based oils, etc.
  • However, for obtaining better vibration control, silicone oil is the most preferred one due to its higher viscosity index, lower friction characteristics, higher flash point, and higher shear strength. 
• The fluid can transmit force which can be controlled with an electromagnet, giving rise to its many possible control-based applications.
• Potential Applications: It is ideal for adaptive technologies such as brakes, clutches, shock absorbers, vibration control systems, dampers, actuators, and medical devices.

About Vikram Sarabhai Medal:

• It was constituted in 1990 in the honour of Vikram Sarabhai.
• It is an international medal awarded to scientists from developing countries for their outstanding contributions to the field of space research.
• It is awarded jointly by Committee on Space Research (COSPAR) and the Indian Space Research Organization (ISRO).
• Eligibility: For a candidate to be eligible for this award, her or his relevant work must have been carried out mainly in the five year period ending one year before the COSPAR Scientific Assembly at which the medal is to be presented. 
  • Other Indian recipients: Anil Bharadwaj (2024), Gurbax Singh Lakhina (2014) and UR Rao, (1996).

Key facts about Committee on Space Research

• It was established in 1958.
• It is an international body affiliated to the International Science Council and United Nations (through UN-COPUS).
• COSPAR is one of the largest forums for space scientists and holds its scientific assembly biennially.