🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 56 (from laksa004)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa056.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical, ml_categories_json AS ml_categories_json, ml_types_json AS ml_types_json, ml_intent_types_json AS ml_intent_types_json, meta_language AS meta_language, attrs_author AS attrs_author, ifNull(toUnixTimestamp(attrs_publish_time), 0) AS attrs_publish_time, ifNull(toUnixTimestamp(attrs_original_publish_time), 0) AS attrs_original_publish_time, ifNull(attrs_is_republished, 0) AS attrs_is_republished, ifNull(attrs_nr_words, 0) AS attrs_nr_words, ifNull(attrs_boilerpipe_nr_words, 0) AS attrs_boilerpipe_nr_words, ifNull(body_ext_links_number, 0) AS body_ext_links_number, ifNull(body_int_links_number, 0) AS body_int_links_number, ifNull(meta_nofollow, 0) AS meta_nofollow, ifNull(meta_noarchive, 0) AS meta_noarchive, ifNull(props_was_rendered, 0) AS props_was_rendered, ifNull(src_redirect, \'\') AS src_redirect, ifNull(download_time_msec, 0) AS download_time_msec, ifNull(download_ttfb_msec, 0) AS download_ttfb_msec, ifNull(download_size, 0) AS download_size FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://people.iith.ac.in/mynav/ecc.html\')), getAhrefsUnparsedNoserviceFromURL(\'https://people.iith.ac.in/mynav/ecc.html\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/people.iith.ac.in\/mynav\/ecc.html","crawl_time":1773667734,"first_indexed_time":1717651426,"http_code":200,"src_unparsed":"in,ac,iith!people,\/mynav\/ecc.html s443","src_root_hash":"16369207150076636856","history_drop_reason":null,"meta_title":"Error Correcting Codes (EE5350) : Aug-Dec 2025.","meta_descriptions":[],"attrs_boilerpipe_text":"Instructor\nMyna Vajha\nTimings and Venue\nSlot R: Tue: 2.30-4pm, Fri: 4-5.30pm\nCS-LH-2\nFirst class on Tuesday, 29th July, 2.30pm\nOffice Hours\nTue: 4-5pm\nTeaching Assistants (TBD)\nOutline (Tentative)\nBasics of binary codes: block length, Hamming weight, minimum distance, rate\nMathematical Preliminaries: Group, Ring, Field, Vector Spaces\nLinear block codes\ngenerator and parity check matrices\ndual code\npuncturing and shortening techniques\nBounds on code sizes: Hamming, Gilbert-Varshamov, Singleton bounds\nMDS codes: Reed Solomon (RS) Codes\nDual of RS codes,\nSystematic Encoding of RS codes\nBerlekamp-Welch decoding\nShamir's Secret Sharing\nApplications to Learning: Straggler Mitigation\nDistributed Computation\nApplications in Post-Quantum Cryptography\nMcElice Cryptosystem\nBoolean functions, Reed Muller Codes, Polar codes\nDecoding Linear Block Codes\nStandard Array, ML, MAP decoder\nShannon's Channel coding theorem (time permitting)\nGeneralized Distributive Law\nLDPC codes\nBelief Propagation\/ Message Passing decoder\nConvolutional Codes, Viterbi Decoder\nFinite Fields, Cyclic Codes (BCH codes)\nReferences\nError Control Codes\n(NPTEL course) by Prof. P. Vijay Kumar.\nCary Huffmann and Vera Pless: Fundamentals of Error-Correcting Codes, Cambridge University Press, 2003\nTom Richardson and Ruediger Urbanke: Modern Coding Theory Cambridge University Press, 2008.\nWill add links to any additional references as course progresses","attrs_markdown":"|   |   |\n|---|---|\n| Myna Vajha [Home](https:\/\/people.iith.ac.in\/mynav\/index.html) [Bio](https:\/\/people.iith.ac.in\/mynav\/bio.html) [Teaching](https:\/\/people.iith.ac.in\/mynav\/teaching.html) [Publications](https:\/\/people.iith.ac.in\/mynav\/pubs.html) [Group](https:\/\/people.iith.ac.in\/mynav\/students.html) [Talks](https:\/\/people.iith.ac.in\/mynav\/talks.html) | Error Correcting Codes (EE5350) : Aug-Dec 2025. Instructor Myna Vajha Timings and Venue Slot R: Tue: 2.30-4pm, Fri: 4-5.30pm CS-LH-2 First class on Tuesday, 29th July, 2.30pm Office Hours Tue: 4-5pm Teaching Assistants (TBD) Outline (Tentative) Basics of binary codes: block length, Hamming weight, minimum distance, rate Mathematical Preliminaries: Group, Ring, Field, Vector Spaces Linear block codes generator and parity check matrices dual code puncturing and shortening techniques Bounds on code sizes: Hamming, Gilbert-Varshamov, Singleton bounds MDS codes: Reed Solomon (RS) Codes Dual of RS codes, Systematic Encoding of RS codes Berlekamp-Welch decoding Shamir's Secret Sharing Applications to Learning: Straggler Mitigation Distributed Computation Applications in Post-Quantum Cryptography McElice Cryptosystem Boolean functions, Reed Muller Codes, Polar codes Decoding Linear Block Codes Standard Array, ML, MAP decoder Shannon's Channel coding theorem (time permitting) Generalized Distributive Law LDPC codes Belief Propagation\/ Message Passing decoder Convolutional Codes, Viterbi Decoder Finite Fields, Cyclic Codes (BCH codes) References [Error Control Codes](https:\/\/nptel.ac.in\/courses\/117108044) (NPTEL course) by Prof. P. Vijay Kumar. Cary Huffmann and Vera Pless: Fundamentals of Error-Correcting Codes, Cambridge University Press, 2003 Tom Richardson and Ruediger Urbanke: Modern Coding Theory Cambridge University Press, 2008. Will add links to any additional references as course progresses Page generated 2025-07-28 17:03:36 India Standard Time, by [jemdoc+MathJax](https:\/\/github.com\/wsshin\/jemdoc_mathjax). |","attrs_readable_markdown":"- Instructor\n  - Myna Vajha\n\n- Timings and Venue\n  - Slot R: Tue: 2.30-4pm, Fri: 4-5.30pm\n  - CS-LH-2\n  - First class on Tuesday, 29th July, 2.30pm\n\n- Office Hours\n  - Tue: 4-5pm\n\n- Teaching Assistants (TBD)\n\n- Outline (Tentative)\n  - Basics of binary codes: block length, Hamming weight, minimum distance, rate\n  - Mathematical Preliminaries: Group, Ring, Field, Vector Spaces\n  - Linear block codes\n    - generator and parity check matrices\n    - dual code\n    - puncturing and shortening techniques\n  - Bounds on code sizes: Hamming, Gilbert-Varshamov, Singleton bounds\n  - MDS codes: Reed Solomon (RS) Codes\n    - Dual of RS codes,\n    - Systematic Encoding of RS codes\n    - Berlekamp-Welch decoding\n    - Shamir's Secret Sharing\n  - Applications to Learning: Straggler Mitigation\n    - Distributed Computation\n  - Applications in Post-Quantum Cryptography\n    - McElice Cryptosystem\n  - Boolean functions, Reed Muller Codes, Polar codes\n  - Decoding Linear Block Codes\n    - Standard Array, ML, MAP decoder\n  - Shannon's Channel coding theorem (time permitting)\n  - Generalized Distributive Law\n    - LDPC codes\n    - Belief Propagation\/ Message Passing decoder\n  - Convolutional Codes, Viterbi Decoder\n  - Finite Fields, Cyclic Codes (BCH codes)\n\n- References\n  - [Error Control Codes](https:\/\/nptel.ac.in\/courses\/117108044) (NPTEL course) by Prof. P. Vijay Kumar.\n  - Cary Huffmann and Vera Pless: Fundamentals of Error-Correcting Codes, Cambridge University Press, 2003\n  - Tom Richardson and Ruediger Urbanke: Modern Coding Theory Cambridge University Press, 2008.\n  - Will add links to any additional references as course progresses","meta_canonical":null,"ml_categories_json":"","ml_types_json":"","ml_intent_types_json":"","meta_language":"en","attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":1717651426,"attrs_is_republished":0,"attrs_nr_words":"222","attrs_boilerpipe_nr_words":"190","body_ext_links_number":2,"body_int_links_number":6,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":515,"download_ttfb_msec":515,"download_size":1844}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

1 month ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	1.3 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://people.iith.ac.in/mynav/ecc.html
Last Crawled	2026-03-16 13:28:54 (1 month ago)
First Indexed	2024-06-06 05:23:46 (1 year ago)
HTTP Status Code	200
Content
Meta Title	Error Correcting Codes (EE5350) : Aug-Dec 2025.
Meta Description	null
Meta Canonical	null
Boilerpipe Text	Instructor Myna Vajha Timings and Venue Slot R: Tue: 2.30-4pm, Fri: 4-5.30pm CS-LH-2 First class on Tuesday, 29th July, 2.30pm Office Hours Tue: 4-5pm Teaching Assistants (TBD) Outline (Tentative) Basics of binary codes: block length, Hamming weight, minimum distance, rate Mathematical Preliminaries: Group, Ring, Field, Vector Spaces Linear block codes generator and parity check matrices dual code puncturing and shortening techniques Bounds on code sizes: Hamming, Gilbert-Varshamov, Singleton bounds MDS codes: Reed Solomon (RS) Codes Dual of RS codes, Systematic Encoding of RS codes Berlekamp-Welch decoding Shamir's Secret Sharing Applications to Learning: Straggler Mitigation Distributed Computation Applications in Post-Quantum Cryptography McElice Cryptosystem Boolean functions, Reed Muller Codes, Polar codes Decoding Linear Block Codes Standard Array, ML, MAP decoder Shannon's Channel coding theorem (time permitting) Generalized Distributive Law LDPC codes Belief Propagation/ Message Passing decoder Convolutional Codes, Viterbi Decoder Finite Fields, Cyclic Codes (BCH codes) References Error Control Codes (NPTEL course) by Prof. P. Vijay Kumar. Cary Huffmann and Vera Pless: Fundamentals of Error-Correcting Codes, Cambridge University Press, 2003 Tom Richardson and Ruediger Urbanke: Modern Coding Theory Cambridge University Press, 2008. Will add links to any additional references as course progresses
Markdown	\| \| \| \|---\|---\| \| Myna Vajha [Home](https://people.iith.ac.in/mynav/index.html) [Bio](https://people.iith.ac.in/mynav/bio.html) [Teaching](https://people.iith.ac.in/mynav/teaching.html) [Publications](https://people.iith.ac.in/mynav/pubs.html) [Group](https://people.iith.ac.in/mynav/students.html) [Talks](https://people.iith.ac.in/mynav/talks.html) \| Error Correcting Codes (EE5350) : Aug-Dec 2025. Instructor Myna Vajha Timings and Venue Slot R: Tue: 2.30-4pm, Fri: 4-5.30pm CS-LH-2 First class on Tuesday, 29th July, 2.30pm Office Hours Tue: 4-5pm Teaching Assistants (TBD) Outline (Tentative) Basics of binary codes: block length, Hamming weight, minimum distance, rate Mathematical Preliminaries: Group, Ring, Field, Vector Spaces Linear block codes generator and parity check matrices dual code puncturing and shortening techniques Bounds on code sizes: Hamming, Gilbert-Varshamov, Singleton bounds MDS codes: Reed Solomon (RS) Codes Dual of RS codes, Systematic Encoding of RS codes Berlekamp-Welch decoding Shamir's Secret Sharing Applications to Learning: Straggler Mitigation Distributed Computation Applications in Post-Quantum Cryptography McElice Cryptosystem Boolean functions, Reed Muller Codes, Polar codes Decoding Linear Block Codes Standard Array, ML, MAP decoder Shannon's Channel coding theorem (time permitting) Generalized Distributive Law LDPC codes Belief Propagation/ Message Passing decoder Convolutional Codes, Viterbi Decoder Finite Fields, Cyclic Codes (BCH codes) References [Error Control Codes](https://nptel.ac.in/courses/117108044) (NPTEL course) by Prof. P. Vijay Kumar. Cary Huffmann and Vera Pless: Fundamentals of Error-Correcting Codes, Cambridge University Press, 2003 Tom Richardson and Ruediger Urbanke: Modern Coding Theory Cambridge University Press, 2008. Will add links to any additional references as course progresses Page generated 2025-07-28 17:03:36 India Standard Time, by [jemdoc+MathJax](https://github.com/wsshin/jemdoc_mathjax). \|
Readable Markdown	- Instructor - Myna Vajha - Timings and Venue - Slot R: Tue: 2.30-4pm, Fri: 4-5.30pm - CS-LH-2 - First class on Tuesday, 29th July, 2.30pm - Office Hours - Tue: 4-5pm - Teaching Assistants (TBD) - Outline (Tentative) - Basics of binary codes: block length, Hamming weight, minimum distance, rate - Mathematical Preliminaries: Group, Ring, Field, Vector Spaces - Linear block codes - generator and parity check matrices - dual code - puncturing and shortening techniques - Bounds on code sizes: Hamming, Gilbert-Varshamov, Singleton bounds - MDS codes: Reed Solomon (RS) Codes - Dual of RS codes, - Systematic Encoding of RS codes - Berlekamp-Welch decoding - Shamir's Secret Sharing - Applications to Learning: Straggler Mitigation - Distributed Computation - Applications in Post-Quantum Cryptography - McElice Cryptosystem - Boolean functions, Reed Muller Codes, Polar codes - Decoding Linear Block Codes - Standard Array, ML, MAP decoder - Shannon's Channel coding theorem (time permitting) - Generalized Distributive Law - LDPC codes - Belief Propagation/ Message Passing decoder - Convolutional Codes, Viterbi Decoder - Finite Fields, Cyclic Codes (BCH codes) - References - [Error Control Codes](https://nptel.ac.in/courses/117108044) (NPTEL course) by Prof. P. Vijay Kumar. - Cary Huffmann and Vera Pless: Fundamentals of Error-Correcting Codes, Cambridge University Press, 2003 - Tom Richardson and Ruediger Urbanke: Modern Coding Theory Cambridge University Press, 2008. - Will add links to any additional references as course progresses
ML Classification
ML Categories	null
ML Page Types	null
ML Intent Types	null
Content Metadata
Language	en
Author	null
Publish Time	not set
Original Publish Time	2024-06-06 05:23:46 (1 year ago)
Republished	No
Word Count (Total)	222
Word Count (Content)	190
Links
External Links	2
Internal Links	6
Technical SEO
Meta Nofollow	No
Meta Noarchive	No
JS Rendered	No
Redirect Target	null
Performance
Download Time (ms)	515
TTFB (ms)	515
Download Size (bytes)	1,844
Shard	56 (laksa)
Root Hash	16369207150076636856
Unparsed URL	in,ac,iith!people,/mynav/ecc.html s443