2nd/10_Wiki/Topics/AI_and_ML/Bibliometrics.md

---
id: wiki-2026-0508-bibliometrics
title: Bibliometrics
category: 10_Wiki/Topics
status: verified
canonical_id: self
aliases: [계량서지학, citation analysis, h-index, impact factor, altmetrics, scientometrics]
duplicate_of: none
source_trust_level: B
confidence_score: 0.88
verification_status: applied
tags: [bibliometrics, citation, h-index, impact-factor, altmetrics, semantic-scholar, openalex, science-of-science]
raw_sources: []
last_reinforced: 2026-05-10
github_commit: pending
tech_stack:
  language: Python
  framework: Semantic Scholar API / OpenAlex / Scopus
---

# Bibliometrics

## 📌 한 줄 통찰
> **"매 knowledge 의 economics"**. 매 citation count + h-index + impact factor 의 quantify. 매 modern: 매 altmetrics + arXiv 의 real-time. 매 Goodhart trap — 매 metric 의 game (citation cartel).

## 📖 핵심

### 매 indicator

#### Citation count
- 매 paper 의 cited 횟수.
- 매 simple, 매 lag.

#### h-index (Hirsch)
- 매 author 의 매 h-index = 매 N 개 paper 가 매 N 회 cited.
- 매 productivity + impact 의 결합.
- 매 한계: 매 self-citation, 매 field 의 difference.

#### i10-index
- 매 ≥10 cite 의 paper 수.

#### Impact Factor (IF)
- 매 journal 의 매 2-year average citation.
- 매 publisher 의 marketing.
- 매 individual paper 의 X (variance).

#### Eigenfactor
- 매 PageRank-like.
- 매 quality-weighted.

#### Altmetrics
- 매 Twitter / blog / news mention.
- 매 immediate.
- 매 attention ≠ 매 quality.

### 매 modern source
- **Google Scholar**: 매 broad, 매 noisy.
- **Scopus** (Elsevier): 매 paid.
- **Web of Science** (Clarivate): 매 paid.
- **Semantic Scholar** (AI2): 매 free, 매 AI-enriched.
- **OpenAlex**: 매 open, 매 250M+ paper.
- **CrossRef**: 매 DOI registry.
- **arXiv**: 매 preprint.
- **PubMed**: 매 biomedical.

### 매 modern issue

#### Citation cartel
- 매 mutual citation.
- 매 self-citation 폭발.
- 매 retractable.

#### Field difference
- 매 CS vs biology vs literature 의 매 base rate 다름.
- 매 normalize 필수.

#### Time lag
- 매 citation 의 매 5 year 의 mature.
- 매 fast field (AI) 의 less applicable.

#### Predatory journal
- 매 paper mill.
- 매 IF 의 fake.

#### LLM 의 영향
- 매 paper volume 의 explosion.
- 매 review 의 saturate.
- 매 quality control 의 break.

### 매 modern alternative
- **Open peer review**.
- **Replication score**.
- **Code/data availability**.
- **Twitter / Mastodon discussion**.
- **YouTube 의 explainer**.
- **Cited by GitHub**.

### 매 응용
1. **Hiring / promotion**: 매 academic.
2. **Funding**: 매 grant evaluation.
3. **Library**: 매 journal subscription.
4. **National R&D**: 매 country comparison.
5. **Trend analysis**: 매 emerging topic.
6. **Knowledge graph**: 매 citation network.

## 💻 패턴

### Semantic Scholar API
```python
import requests

def get_paper(doi):
    r = requests.get(f'https://api.semanticscholar.org/graph/v1/paper/DOI:{doi}',
                     params={'fields': 'title,authors,year,citationCount,influentialCitationCount,references,citations'})
    return r.json()

paper = get_paper('10.48550/arXiv.2206.04615')
print(f"{paper['title']}: {paper['citationCount']} citations")
```

### OpenAlex (open citation data)
```python
import requests

def search(query, n=20):
    r = requests.get('https://api.openalex.org/works',
                     params={'search': query, 'per_page': n,
                             'select': 'id,title,publication_year,cited_by_count,authorships'})
    return r.json()['results']

# 매 author h-index
def author_h_index(author_id):
    r = requests.get(f'https://api.openalex.org/works',
                     params={'filter': f'author.id:{author_id}', 'per_page': 200,
                             'select': 'cited_by_count'})
    citations = sorted([w['cited_by_count'] for w in r.json()['results']], reverse=True)
    h = sum(1 for i, c in enumerate(citations) if c >= i + 1)
    return h
```

### Citation network (NetworkX)
```python
import networkx as nx

def build_citation_network(seed_paper_id, depth=2):
    G = nx.DiGraph()
    queue = [(seed_paper_id, 0)]
    seen = set()
    
    while queue:
        pid, d = queue.pop(0)
        if pid in seen or d > depth: continue
        seen.add(pid)
        paper = get_paper(pid)
        G.add_node(pid, title=paper['title'], year=paper['year'])
        
        for ref in paper.get('references', []):
            G.add_edge(pid, ref['paperId'])
            queue.append((ref['paperId'], d + 1))
    
    return G

# 매 PageRank 의 influence
pageranks = nx.pagerank(G)
top_influential = sorted(pageranks.items(), key=lambda x: -x[1])[:10]
```

### Altmetrics
```python
# 매 Altmetric API
import requests

def altmetric(doi):
    r = requests.get(f'https://api.altmetric.com/v1/doi/{doi}')
    if r.status_code != 200: return None
    data = r.json()
    return {
        'score': data.get('score'),
        'twitter': data.get('cited_by_tweeters_count'),
        'news': data.get('cited_by_msm_count'),
        'blog': data.get('cited_by_feeds_count'),
    }
```

### Field-normalized citation
```python
def field_normalized_citation_score(paper_citations, field_avg, field_year_avg):
    """매 field + year 의 normalize."""
    expected = field_year_avg
    return paper_citations / max(expected, 1)
    
# 매 RCR (Relative Citation Ratio) — NIH 의 metric
```

### Trend detection
```python
def emerging_topic(papers_by_year, recent_years=3):
    """매 recent 의 acceleration 의 detect."""
    recent_count = sum(papers_by_year.get(y, 0) for y in range(2024, 2027))
    older_count = sum(papers_by_year.get(y, 0) for y in range(2020, 2024))
    
    growth = (recent_count - older_count) / max(older_count, 1)
    return growth > 1.5  # 매 2.5× growth → 매 emerging
```

### Predatory journal detector
```python
PREDATORY_INDICATORS = [
    'fee mentioned upfront',
    'no peer review',
    'bogus impact factor',
    'misleading scope',
    'spam emails',
]

def assess_journal(journal):
    score = 0
    if journal.has_apc and journal.apc < 100: score += 1  # too cheap
    if journal.peer_review_time < 7: score += 1  # too fast
    if journal.editorial_board_overlap > 50: score += 1
    if journal.in_doaj: score -= 2  # whitelist
    return 'predatory' if score >= 2 else 'legitimate'
```

## 🤔 결정 기준
| 사용 | Indicator |
|---|---|
| Single paper | Citation + altmetric + influential citations |
| Author | h-index + i10 + field-normalized |
| Journal | Eigenfactor (NOT IF) |
| Trend | Year-over-year growth |
| Country | Field-normalized + collaboration |
| Hiring | Mix + qualitative review |

**기본값**: OpenAlex / Semantic Scholar (free) + 매 multi-metric + 매 qualitative.

## 🔗 Graph
- 변형: [[Citation-Analysis]] · [[Altmetrics]] · [[Scientometrics]]
- 응용: [[H-Index]] · [[Impact-Factor]]
- Adjacent: [[Goodharts-Law]]

## 🤖 LLM 활용
**언제**: 매 literature review. 매 trend detection. 매 author / journal evaluation. 매 knowledge graph 구축.
**언제 X**: 매 single citation count 의 quality conclusion. 매 cross-field comparison without normalize.

## ❌ 안티패턴
- **IF 의 individual paper 적용**: 매 misleading.
- **h-index 만**: 매 manipulation.
- **No field normalize**: 매 cross-field unfair.
- **Self-citation 의 ignore**: 매 inflated.
- **Recent paper 의 IF 평가**: 매 lag X.
- **Predatory 의 trust**: 매 fake metric.
- **Citation 의 quality 의 conflate**: 매 controversial paper 의 high citation.

## 🧪 검증 / 중복
- Verified (Hirsch h-index, NIH RCR, San Francisco DORA declaration).
- 신뢰도 B.
- Related: [[Awards]] · [[Benchmarks]] · [[Goodharts-Law]] · [[Open-Science]].

## 🕓 Changelog
| 날짜 | 변경 |
|---|---|
| 2026-05-08 | Phase 1 |
| 2026-05-10 | Manual cleanup — indicator + altmetric + 매 OpenAlex / Semantic Scholar code + predatory detector |