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README.md
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# 🧠 Open Multi-Label ASJC Classification
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## Model Overview
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This model fine-tunes **allenai/scibert_scivocab_uncased** across **307 ASJC subject categories**, enabling document-level classification beyond traditional journal-level schemes.
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- **Task**: Multi-label classification
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- **Labels**: 307 ASJC subjects (granular level)
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- **Base Model**: [SciBERT](https://arxiv.org/pdf/1903.10676)
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- **Training Data**: Crossref 2023 dataset (titles, abstracts, container titles)
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- **License**: MIT
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- **Framework**: Hugging Face Transformers
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---
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## 📚 Intended Use
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- Classify individual research documents into multiple ASJC subjects.
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- Analyze disciplinary orientation of **collections** (authors, institutions, databases).
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- Works with **title**, **abstract**, and optionally **container title** metadata.
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---
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## 🛠 Training Details
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- **Dataset**: [Crossref](https://doi.org/10.13003/8wx5k)
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- **Preprocessing**:
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- Removed “multidisciplinary” and 26 “miscellaneous” categories → 307 subjects.
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- Multi-hot encoding for multi-label classification.
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- Data augmentation for underrepresented classes.
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- **Fine-tuning**:
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- Optimizer: AdamW
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- Loss: Binary Cross-Entropy
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- Learning Rate: 2e-5
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- Epochs: 1
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- Batch Size: 16
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- Threshold for label assignment: 0.3
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---
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## 📈 Metrics
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| Input Features | Labels | Precision | Recall | F1-Score |
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|-----------------------------------|--------|-----------|--------|----------|
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| Title + Container Title + Abstract| 307 | 0.912 | 0.885 | 0.892 |
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| Title + Abstract | 307 | 0.607 | 0.503 | 0.532 |
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| Title + Container Title | 307 | 0.949 | 0.957 | 0.952 |
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| Title only | 307 | 0.528 | 0.416 | 0.448 |
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For **26 parent subjects**, F1-score improves to **0.934** with full metadata.
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---
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## ✅ Model Strengths
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- Handles **interdisciplinary** and **general science journals**.
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- Works even without container title (lower accuracy).
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- Scalable for large collections.
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---
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## ⚠️ Limitations
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- Performance relies on metadata completeness (title, abstract, container title).
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- Lower accuracy for rare subjects and missing source info.
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- Snapshot of ASJC schema as of April 2023 (not updated for emerging fields).
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---
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## 🔍 Example Usage
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```python
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from transformers import AutoTokenizer, AutoModelForSequenceClassification
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import torch
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import json
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# Load model and tokenizer
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model_name = "your-hf-username/open-asjc-multilabel"
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tokenizer = AutoTokenizer.from_pretrained(model_name)
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model = AutoModelForSequenceClassification.from_pretrained(model_name)
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# Load sample input
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with open("small_example.json") as f:
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data = json.load(f)
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text = data["title"] + " " + data.get("abstract", "")
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inputs = tokenizer(text, return_tensors="pt", truncation=True, max_length=512)
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# Predict
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with torch.no_grad():
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outputs = model(**inputs)
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probs = torch.sigmoid(outputs.logits).cpu().numpy()[0]
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# Apply threshold
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threshold = 0.3
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predicted_labels = [label for label, prob in zip(model.config.id2label.values(), probs) if prob >= threshold]
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```
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## 📖 Citation
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If you use this work, please cite:
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```bibtex
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@article{gusenbauer2025open,
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author = {Gusenbauer, Michael and Endermann, Jochen and Huber, Harald and Strasser, Simon and Granitzer, Andreas-Nizar and Ströhle, Thomas},
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title = {Fine-tuning SciBERT to enable ASJC-based assessments of the disciplinary orientation of research collections},
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journal = {Scientometrics},
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year = {2025}
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}
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