Library · Machine learning & AI

What Transformers & Attention Models got wrong, from 83 theses

Summary written by a model from the records below: Research records demonstrate widespread challenges when applying transformers and attention mechanisms across vision, language, and sequential data domains. Many implementations suffered from severe overfitting on limited data, excessive computational scaling costs, and an inability to outperform simpler recurrent, convolutional, or statistical baselines. These records come from graduate theses, 2021 to 2026, each labeled with its degree where the repository states it, and each links to its thesis. They were extracted by language models reading the full text, so treat each as a lead to read, not a verdict.

83
theses
27
institutions
92
failure records
7
failure modes

Plus 9 problems the authors left open, listed at the end.

Failure modes, by theses reporting them

Select a mode to jump to its records.

Severe overfitting and poor generalization arise on small or limited datasets
15
15 theses · 12 institutions · 15 records
Modified attention mechanisms and steering interventions degrade contextual representation
15
15 theses · 9 institutions · 17 records
Input representations and structural approximations cause significant performance drops
14
14 theses · 7 institutions · 14 records
Pure transformers fail to match simpler recurrent and statistical models on sequential tasks
12
12 theses · 9 institutions · 14 records
Vision transformers struggle with local spatial structures compared to convolutional networks
13
13 theses · 7 institutions · 14 records
Complex multi-transformer architectures underperform simpler single-model configurations
11
11 theses · 9 institutions · 12 records
Quadratic self-attention complexity creates severe computational and latency bottlenecks
6
6 theses · 6 institutions · 6 records

Severe overfitting and poor generalization arise on small or limited datasets

15 theses · 12 institutions

Transformers with large parameter counts and excessive capacity consistently overfitted when trained on limited samples or specialized domain data. Inadequate regularization, overly deep layer stacking, and noisy fine-tuning led to rising validation losses and degraded test performance.

Tried and failed

fine-tuning pre-trained transformers with limited data applied to multivariate time series forecasting. Outcome: worse than baseline. Reason: overfitting to seasonal and occupancy patterns degraded performance below zero-shot baseline

Toward Transformer-based Large Energy Models for Smart Energy Management · Virginia Tech · Master's

Tried and failed

large transformer architecture for time series forecasting applied to power distribution load forecasting. Outcome: overfit. Reason: excessive parameter count led to severe overfitting on the training data

Advances to forecasting and planning frameworks toward resilient power distribution systems · Iowa State · PhD

Tried and failed

increasing hidden dimension in transformer model applied to time series temperature forecasting. Outcome: overfit. Reason: excessive model capacity caused overfitting after prolonged training compared to smaller hidden dimensions

Machine learning on building energy modeling : city and building scale · UT Austin · PhD

Tried and failed

pretraining transformer language models from scratch applied to small domain-specific token sequences. Outcome: worse than baseline. Reason: Dataset size was too small for transformer pretraining compared to simpler static word embeddings

Mining for Health: Advancing trustworthy statistical and machine learning methods for complex electronic health records data · Penn · PhD

Tried and failed

noisy text augmentation for cross-validation applied to transformer language models on small datasets. Outcome: overfit. Reason: augmentations lacked sufficient diversity and heightened model sensitivity to noise, worsening overfitting on small splits

Privacy-preserving dementia processing in speech · Imperial · PhD

Tried and failed

fine-tuning pretrained transformer for continuous regression applied to short text evaluation scores. Outcome: overfit. Reason: validation loss fluctuated in later epochs, failing to generalize to unseen data

Enhancing Sensory Panel Decision-Making: A GenAI Approach Using RoBERTa to Quantify Free-Form Comments · Cornell · Master's

Lost to a baseline

A 45M parameter large Transformer achieved lower mean generalization accuracy (0.20 ± 0.26) than smaller 9.5M (0.35) and 5.3M (0.37) parameter Transformers.

Compositional Linguistic Generalization in Artificial Neural Networks · Johns Hopkins · PhD

Considered and rejected

Considered and rejected: Vision transformers (ViTs) rejected due to large data requirements and small target dataset size

Deep Learning and Synthetic Imagery for Migratory Bird Species Identification Using Drones · Carleton University · Master's

Considered and rejected

Considered and rejected: Rejected Transformer and hybrid spectrogram Demucs variants due to overfitting and lack of convergence on small sample sizes.

Extraction of Blood Volume Pulse Morphology from Facial Videos Using an LSTM-Based Temporal Encoder-Decoder Model · Virginia Tech · Master's

Considered and rejected

Considered and rejected: Rejected end-to-end recurrent/deep video architectures (e.g., LSTM, video transformers) for interview classification due to small subject sample sizes and severe overfitting risks

Multimodal assessment of neuropsychiatric disorders using audiovisual recordings · Georgia Tech · PhD

Tried and failed

overly strict early stopping threshold applied to transformer sequence-to-sequence fine-tuning. Outcome: overfit. Reason: small improvement threshold prevented stopping, leading to excessive training epochs and reduced generalization

Ensemble summarization models to leverage performance on CoronaNet · Texas Tech · Master's

Tried and failed

increasing Transformer layer depth applied to sensor time series calibration. Outcome: overfit. Reason: deeper architectures led to overfitting or diminishing returns without performance improvements

A fine-scale spatiotemporal air quality modeling framework by combining big but noisy data · Imperial · PhD

Tried and failed

Lowering classification head dropout during fine-tuning applied to audio spectrogram transformer classification. Outcome: overfit. Reason: Insufficient regularization led to higher training accuracy at the expense of test generalization

AI-generated synthetic audio analysis and forensic attribution · Iowa State · Master's

Considered and rejected

Considered and rejected: Rejected deep/large transformer neural architectures for tabular similarity feature classification in favor of XGBoost and a shallow 5-layer Sigmoid ANN to prevent overfitting.

Knowledge Graph Extension by Entity Type Recognition · University of Trento · PhD

Considered and rejected

Considered and rejected: Rejected Transformer and GNN context encoders in ModuMorph due to overfitting and training instability, choosing simple MLPs instead.

Multi-task generalization for robotics · Oxford · PhD

Modified attention mechanisms and steering interventions degrade contextual representation

15 theses · 9 institutions

Altering standard attention through head steering, sink score amplification, or inverted normalization caused token distraction and discarded essential context. Similarly, learned soft attention and linear approximations failed to focus feature representations or improve performance over uniform weighting and basic baselines.

Tried and failed

softmax self-attention mechanism applied to linear regression tasks. Outcome: worse than baseline. Reason: nonlinearity introduced representational inefficiencies requiring twice as many attention heads to match linear baseline

Making Sense of Training Large AI Models · MIT · PhD

Tried and failed

steering all attention heads simultaneously applied to large language model self-attention mechanism. Outcome: worse than baseline. Reason: over-amplified targeted features at the expense of other essential contextual information

On the Efficiency and Steerability of Self-Attention Mechanism of Large Language Models · Georgia Tech · PhD

Tried and failed

adding self-attention layer to recurrent neural network applied to sequential event classification. Outcome: worse than baseline. Reason: did not improve predictive performance over standard recurrent model despite increasing interpretability

Generalised Modeling of Inquiry Behaviour: From Learning to Understanding · EPFL · PhD

Tried and failed

pure self-attention without convolutional feature extraction applied to multichannel time-series prediction. Outcome: worse than baseline. Reason: lacked local receptive fields and temporal inductive bias needed for raw signal representation

Investigation of Future Voluntary Movement Prediction for Pathological Tremor-Alleviating Exoskeletons · Virginia Tech · Master's

Tried and failed

threshold-clamped inverted normalisation softmax attention applied to vision transformer self-attention. Outcome: worse than baseline. Reason: encourages attention distraction across tokens during self-attention computation

Efficient machine learning software stack from algorithms to compilation · UT Austin · PhD

Tried and failed

standard self-attention without smoothness regularization applied to aspect extraction. Outcome: worse than baseline. Reason: attention weights over-concentrated on single words rather than broader context

Novel Algorithms for Understanding Online Reviews · Virginia Tech · Doctorate

Tried and failed

multiplicative gating on self-attention applied to transformer language models. Outcome: worse than baseline. Reason: did not improve downstream GLUE performance over standard self-attention

Designing for Inference in Future Generative Models · Cornell · PhD

Tried and failed

learned attention weighting for extractive rationale selection applied to text classification tasks. Outcome: worse than baseline. Reason: learned attention mechanisms did not improve classification performance over uniform attention baselines

Interpreting Neural Networks for and with Natural Language · Georgia Tech · PhD

Tried and failed

soft attention in reinforcement learning applied to visual robotic manipulation policy learning. Outcome: worse than baseline. Reason: implicit attention learning without explicit losses failed to focus feature representations effectively

Tightly-coupled manipulation pipelines: Combining traditional pipelines and end-to-end learning · Imperial · PhD

Tried and failed

selective attention redistribution to specific prompt components applied to transformer language model inference. Outcome: worse than baseline. Reason: biasing recovered attention exclusively toward questions or choices degraded task performance relative to uniform redistribution

Enhancing Foundation Models with Self-Guided Techniques: From Attention to Adapters to Agents · Georgia Tech · PhD

Tried and failed

Allocating asymmetric attention under constant information capacity applied to Sequential binary decision making. Outcome: worse than baseline. Reason: Performance peaked under balanced attention allocation rather than extreme focused attention

Optimal policy for attention-modulated decisions explains human fixation behavior · Harvard · Doctorate

Tried and failed

Attention mechanism over prototype feature representations applied to Metric-based few-shot classification. Outcome: worse than baseline. Reason: Learned attention weights did not outperform simple weighted side information combinations

Few-Shot and Zero-Shot Learning for Information Extraction · Virginia Tech · Doctorate

Tried and failed

increasing attention sink scores via inverse calibration applied to attention redistribution in foundation models. Outcome: worse than baseline. Reason: amplifying attention to non-informative sink tokens exacerbates distraction from semantically relevant tokens

Enhancing Foundation Models with Self-Guided Techniques: From Attention to Adapters to Agents · Georgia Tech · PhD

Tried and failed

zeroing scaling coefficient during attention steering applied to attention heads in language models. Outcome: worse than baseline. Reason: completely removed other crucial contexts at the steered attention heads

On the Efficiency and Steerability of Self-Attention Mechanism of Large Language Models · Georgia Tech · PhD

Tried and failed

linear attention approximation applied to automatic speech recognition. Outcome: worse than baseline. Reason: linear attention degradation compared to softmax attention

Efficient Transformer-Based Speech Recognition · EPFL · PhD

Tried and failed

self-attention mechanism for pairwise interaction modeling applied to permutation-invariant neural network surrogate. Outcome: worse than baseline. Reason: exhibited slow convergence and poorer MSE and gradient accuracy compared to weight-shared MLPs

Development of robust and efficient optimization algorithms for subsurface field development under uncertainty · UT Austin · PhD

Lost to a baseline

Double Self-Attention model (AUROC 80.50% / 87.10%) was outperformed by standard black-box BiLSTM (AUROC 81.24% / 88.02%) on MIMIC-III and eICU delirium prediction

Machine learning applications in Intensive Care Unit · University of Trento · PhD

Input representations and structural approximations cause significant performance drops

14 theses · 7 institutions

Relying on structured sparse approximations, post-training quantization, or uncalibrated positional encodings introduced accumulated errors and degraded output quality. Suboptimal input configurations such as zero shift masking, data clustering, or combining disparate feature streams also harmed overall predictive capability.

Tried and failed

clustering time series before training transformer forecasters applied to mobile network traffic prediction. Outcome: worse than baseline. Reason: partitioning data into clusters degraded transformer prediction accuracy compared to unclustered baseline

A Framework for Generalizing Uncertainty in Mobile Network Traffic Prediction · Virginia Tech · Master's

Tried and failed

physics-informed transformer predicting temporal differences applied to indoor temperature forecasting. Outcome: worse than baseline. Reason: poor percentage error performance during periods when target delta values are near zero

Machine learning on building energy modeling : city and building scale · UT Austin · PhD

Tried and failed

zero future masking shift in transformer event modeling applied to irregular event sequence prediction. Outcome: worse than baseline. Reason: setting shift to zero reduced predictive performance compared to positive shift windows

Deep Learning Foundations for Irregular Electronic Health Record Time Series: Synthesis, Feature Learning, and Irregular-Time Supervised Modeling · EPFL · PhD

Tried and failed

Transformer on execution history sequences applied to database query performance prediction. Outcome: worse than baseline. Reason: representation leakage and query runtime variability when omitting system logs

Machine Learning for Out of Distribution Database Workloads · MIT · PhD

Lost to a baseline

Transformer language model reaction embeddings failed to outperform Random Forest, Extreme Gradient Boosting, or Feedforward Neural Networks using standard fingerprint or DFT features.

Machine Learning for Chemical Reactivity Prediction: Paradigms, Challenges, and Applications · MIT · PhD

Considered and rejected

Considered and rejected: Standard Transformer ANN architecture was rejected for multivariate PV power forecasting because it cannot natively take multivariate input features without architectural modification.

Investigation of innovative IoT technologies for complex manufacturing process modelling and optimization · Politecnico di Torino · PhD

Considered and rejected

Considered and rejected: Rejected using only a single unified transformer for social trajectory forecasting because mixing individual feature extraction with inter-agent attention degraded accuracy.

Deep Generative Models for Autonomous Driving: from Motion Forecasting to Realistic Image Synthesis · EPFL · PhD

Considered and rejected

Considered and rejected: Transformer models with dmodel of 16 were rejected because preliminary observations showed they could not decrease the training loss.

Evolutionary Optimization of Neural Architectures for Remaining Useful Life Prediction · University of Trento · PhD

Lost to a baseline

Softmax attention achieved lower bits/dim on MNIST image generation (0.621 bpd) compared to Linear transformer (0.644 bpd).

Stop Wasting my FLOPS: Improving the Efficiency of Deep Learning Models · EPFL · PhD

Considered and rejected

Considered and rejected: Rejected MLP classifier with cross-attention for SketchQL's Matcher because it easily overfit training data compared to a cosine similarity metric over learned transformer embeddings

Enabling semantically richer queries over unstructured data · Georgia Tech · PhD

Tried and failed

transformer post-training quantization methods applied to state space models. Outcome: worse than baseline. Reason: outlier distributions and architecture differences in state space models cause severe perplexity degradation

Efficient model adaptation and compression for edge intelligence · UT Austin · PhD

Tried and failed

replacing dense linear layers with structured sparse approximations applied to transformer blocks. Outcome: worse than baseline. Reason: accumulated approximation error across all layers caused model quality degradation

Structured Sparsity-Aware Hardware-Software Co-Design for Deep Neural Network Acceleration · Georgia Tech · PhD

Tried and failed

sinusoidal positional encoding in transformers applied to small tabular time-series datasets. Outcome: worse than baseline. Reason: outperformed by explicit temporal feature concatenation on limited training data

Developing Transferable Deep Models for Mobile Health · Georgia Tech · PhD

Lost to a baseline

Transformer without symmetry regularizer lost to Transformer with permutation-invariance regularizer on cyclical target f3 test error (8.14 ± 0.9 vs 0.95 ± 0.13).

Learning to Reason with Neural Networks: Principles and Methods · EPFL · PhD

Pure transformers fail to match simpler recurrent and statistical models on sequential tasks

12 theses · 9 institutions

Standalone and spatio-temporal transformer models frequently underperformed traditional recurrent networks and statistical forecasters on time series and trajectory forecasting. These models suffered from exposure bias over long prediction horizons and lacked sufficient representation capacity when modeling single-dimension sequential inputs.

Tried and failed

time series transformer applied to asset price forecasting. Outcome: worse than baseline. Reason: underperformed simpler autoregressive baseline on predictive accuracy metrics

An Economic Evaluation of NFTs: A Systematic Framework for Prediction and Analysis with Other Comparable Assets · Texas Tech · PhD

Tried and failed

transformer architecture for sequence prediction applied to vehicle trajectory forecasting. Outcome: overfit. Reason: transformer backbone suffered severe overfitting compared to recurrent network baseline

Prediction of Traffic Agents' Trajectories in Urban Scenarios Using Deep Learning · Cranfield · PhD

Tried and failed

spatio-temporal transformer with self-attention applied to continuous multi-sensor time series prediction. Outcome: worse than baseline. Reason: performed worse than recurrent baseline while increasing computation without accuracy gains

A Deep-learning based Approach for Foot Placement Prediction · Virginia Tech · Master's

Tried and failed

Transformer architecture alone for anomaly detection applied to time-series anomaly detection. Outcome: worse than baseline. Reason: Standalone Transformer encoder underperformed recurrent neural network architectures in sequential state anomaly detection

An assessment of deep cyber-physical situational awareness of power system using real-time testbed · Texas Tech · PhD

Tried and failed

transformer models on univariate inputs applied to univariate time series forecasting. Outcome: worse than baseline. Reason: single-dimension embeddings provide insufficient representation capacity compared to recurrent models

A Framework for Generalizing Uncertainty in Mobile Network Traffic Prediction · Virginia Tech · Master's

Lost to a baseline

Transformer trajectory predictor exhibited higher Euclidean error than LSTM on longer prediction horizons (>180s) due to exposure bias between teacher forcing and autoregressive inference.

A Data-driven Methodology for Aircraft Trajectory Analysis to Improve Mid-air Conflict Detection in Terminal Airspace · Georgia Tech · PhD

Lost to a baseline

Transformer predictor model achieved higher test RMSE (0.583 vs 0.532) and lower Pearson R (0.818 vs 0.846) compared to the simpler bidirectional LSTM on MMP1.

Amplifying signals in the tumor microenvironment for drug development and diagnostics · MIT · PhD

Lost to a baseline

Transformer model (MAPE 0.205, IA 0.483) lost to the baseline ARIMAX Top 3 model (MAPE 0.179, IA 0.893).

An Economic Evaluation of NFTs: A Systematic Framework for Prediction and Analysis with Other Comparable Assets · Texas Tech · PhD

Lost to a baseline

Transformer model lost significantly to GLM with tCCA (Transformer: RMSE ~0.5410, Corr ~0.3028 vs. GLM with tCCA: RMSE ~0.1117, Corr ~0.9708).

Reducing motion-related artifacts in human brain measurements using functional near infrared spectroscopy (fNIRS) · Boston University · Master's

Lost to a baseline

Standard Transformer backbone performed worse than GRU and LSTM on scanpath reconstruction and fixation pre-tasks.

Low-Resource Neural Adaptation: A Unified Data Adaptation Framework for Neural Networks · University of Washington · PhD

Considered and rejected

Considered and rejected: Rejected pure Transformer sequence modeling in Oh, opting for hybrid attention + LSTM because pure Transformers perform inconsistently on time-series.

From Coarse Single Theoretical to Fine Multiple Practical: Machine Learning-Empowered Real-Time Communications · Politecnico di Torino · PhD

Considered and rejected

Considered and rejected: Transformers and S4 sequence models were considered to model FC temporal dynamics but rejected because vanilla LSTMs performed sufficiently well and preliminary transformer tests showed no huge impact.

Mapping dynamic brain networks with MEG data using machine learning · Oxford · PhD

Considered and rejected

Considered and rejected: Self-attention and Transformer architectures were rejected in favor of vanilla GRU, which inherently weights recent timesteps higher and achieves faster inference.

A Deep-learning based Approach for Foot Placement Prediction · Virginia Tech · Master's

Tried and failed

Transformer architecture for autoencoding applied to moderate-size text autoencoders. Outcome: worse than baseline. Reason: failed to outperform recurrent neural networks on moderate-sized datasets

Controlling Neural Language Generation · MIT · PhD

Vision transformers struggle with local spatial structures compared to convolutional networks

13 theses · 7 institutions

Vision transformers lacked the structural inductive biases needed to model localized correlations and complex volumetric sequences effectively. Modifying patch sizes, downsampling inputs, or adding intermediate dense layers failed to bridge domain gaps or match standard convolutional architectures.

Tried and failed

temporal transformers instead of factorised spatio-temporal convolutions applied to video regression tasks. Outcome: worse than baseline. Reason: None

Deep learning for medical ultrasound video understanding and generation · Imperial · PhD

Considered and rejected

Considered and rejected: Rejected Transformers for cardiac ultrasound video LVEF regression in favor of ResNet 2+1D because transformers failed to outperform convolutions along temporal dimensions.

Towards autonomous diagnostic systems with medical imaging · Imperial · PhD

Considered and rejected

Considered and rejected: Rejected Transformer-based spatio-temporal architectures for deforestation forecasting in favor of ConvLSTM due to worse performance on low-dimensional, locally structured spatial data.

Spatio-temporal deep learning for understanding and forecasting tropical deforestation · EPFL · PhD

Tried and failed

general-purpose self-supervised vision transformers applied to fine-grained visual skill assessment. Outcome: worse than baseline. Reason: recognition-optimized representations fail to capture subtle domain-specific articulatory quality nuances

Advancing Phonology-Based Sign Language Assessment: From Learner to Machine-Generated Videos · EPFL · PhD

Tried and failed

pure vision transformer with smaller patch size applied to 3D spatiotemporal microstructural degradation prediction. Outcome: worse than baseline. Reason: Lacks inductive spatial biases of CNNs for complex 3D volumetric sequences

TransVNet: Predicting bone degradation using ViT and virtual dataset of cellular microstructures · Iowa State · Master's

Tried and failed

adding intermediate fully-connected layers before classification head applied to vision transformer classification heads. Outcome: did not generalise. Reason: degraded generalization performance compared to direct classification

Transformer Networks for Smart Cities: Framework and Application to Makassar Smart Garden Alleys · Virginia Tech · Master's

Tried and failed

increasing input resolution during training applied to vision transformer self-supervised learning. Outcome: worse than baseline. Reason: reduced patch receptive fields degraded global token representation alignment

Exploiting Representation Similarities in Self-Supervised Learning for Vision Tasks · EPFL · PhD

Tried and failed

training all hidden layers in vision transformer applied to 3D microstructure sequence prediction. Outcome: worse than baseline. Reason: Full fine-tuning of transformer hidden layers failed to achieve satisfactory segmentation and distance metrics

TransVNet: Predicting bone degradation using ViT and virtual dataset of cellular microstructures · Iowa State · Master's

Tried and failed

Vision Transformer for spatial property estimation applied to short-range nonstationary spatial data. Outcome: worse than baseline. Reason: Attention mechanisms struggle to capture very localized spatial correlations compared to standard convolutional architectures under nonstationarity

Deep learning for spatial nonstationarity : evaluation, mitigation, and generation · UT Austin · PhD

Tried and failed

dilated sparse attention without dense local attention applied to vision transformers for image classification. Outcome: worse than baseline. Reason: omitting local neighborhood context degrades representations when relying purely on dilated sparse receptive fields

Neighborhood Attention: Fast and Flexible Sparse Attention · Georgia Tech · PhD

Tried and failed

self-supervised vision transformer for novel-class verification applied to sub-terahertz imaging object detection. Outcome: did not generalise. Reason: severe domain gap between natural image pre-training and sub-terahertz imagery

Advanced machine learning for object detection in sub-terahertz images · Imperial · PhD

Tried and failed

uniform input resolution downsampling applied to vision transformer compute reduction. Outcome: worse than baseline. Reason: reduced spatial detail significantly degraded accuracy compared to dynamic token and patch pruning at matched compute

Scalable transfer learning : enhancing adaptation and efficiency in uni- and multi-modal applications · UT Austin · PhD

Lost to a baseline

Swin-T vision transformer had lower brain prediction accuracy across visual cortex than simpler convolutional networks (CNN8, AlexNet, SqueezeNet1.1, ResNet18)

Characterizing human vision through large-scale brain imaging and computational models · MIT · PhD

Considered and rejected

Considered and rejected: Rejected using transformers for medical image analysis within the thesis due to their high data demands and lack of structural inductive bias compared to CNNs.

Label-efficient medical image segmentation: the benefits and limitations of semi-supervised generative models · Imperial · Doctorate

Complex multi-transformer architectures underperform simpler single-model configurations

11 theses · 9 institutions

Multi-transformer frameworks and composite architectures consistently underperformed simpler single-transformer variants and feedforward baselines across multiple benchmarks. Adding redundant self-attention layers within multi-modal or decoder modules introduced unneeded complexity without delivering measurable performance gains.

Lost to a baseline

Informer Transformer (0.6° COG MAE, 0.506 kt SOG MAE) was beaten by the simpler 2-layer FNN baseline (0.0093° COG MAE, 0.0167 kt SOG MAE).

USING SPATIAL-TEMPORAL MACHINE LEARNING TO ANALYZE AND PREDICT SHIP MOVEMENTS · Naval Postgraduate School · Master's

Lost to a baseline

The Dual-Transformer + LSTM architecture (macro F1 0.718–0.721) was beaten in Precision, macro F1, and Kappa by the simpler Single-Transformer + LSTM architecture (macro F1 0.728).

Automatic Analysis of Epistemic Stance-Taking in Academic English Writing: A Systemic Functional Approach · University of Oregon · PhD

Considered and rejected

Considered and rejected: Rejected running self-attention before ON-LSTM (SA-ON-LSTM) to capture sentence context; CEON-LSTM performed better (71.08 vs 70.13 F1).

Structure-based Models for Neural Information Extraction · University of Oregon · PhD

Considered and rejected

Considered and rejected: Rejected full self-attention within modalities in TCaF, as cross-modal bottleneck attention significantly improves cross-modal generalisation.

Towards Better Video Understanding through Language Guidance · Tübingen · PhD

Considered and rejected

Considered and rejected: Enforcing self-attention within CRTNet's transformer decoder layers was omitted because it provided no observed performance improvements over cross-attention.

Out-of-Distribution Generalization in Biological and Artificial Intelligence. · Harvard · PhD

Considered and rejected

Considered and rejected: Rejected self-attention mechanisms in TAIN's CS module in favor of cross-attention between tentative frame predictions (queries) and input frames (keys/values)

Motion Boundary and Occlusion Reasoning for Video Analysis · Duke · PhD

Considered and rejected

Considered and rejected: Single-head attention for in-context learning of 3-gram statistics because it fails to outperform bigram baselines.

Combinatorial Tasks as Model Systems of Deep Learning · Harvard · PhD

Lost to a baseline

Transformer lost to Pointer-Generator on diversity (Div-2) on the Filtered Reddit dataset (0.06% vs 4.00%)

Modeling context and knowledge for dialogue generation · Nottingham · PhD

Lost to a baseline

Spatio-Temporal Transformer (STT) performed worse than simple Feedforward Neural Networks (FNN) across simpler disaggregation tasks (e.g., PUMA to NTA).

In Pursuit of High-Quality Urban Data · University of Washington · PhD

Lost to a baseline

Transformer-RNN Model achieved higher F-beta score (0.967) and lower validation loss (0.04) than H-TST (F-beta 0.952, valid loss 0.05) on CICIoT2023

Optimizing Distributed Denial of Service (DDoS) Detection with Time Series Transformers · Carleton University · Master's

Lost to a baseline

Standard GRU and Transformer slightly outperformed the complex R-Transformer on EVSE charging power misconfiguration detection (F-score 0.47 vs 0.46)

Data driven detection of misconfigurations in power distribution systems · TU Wien · PhD

Lost to a baseline

The dual-Transformer architecture underperformed both single-Transformer and Transformer+LSTM architectures on overall F1 (F1 = 0.71 vs. 0.72 and 0.73) and precision in random hyperparameter searches.

Automatic Analysis of Epistemic Stance-Taking in Academic English Writing: A Systemic Functional Approach · University of Oregon · PhD

Quadratic self-attention complexity creates severe computational and latency bottlenecks

6 theses · 6 institutions

Quadratic scaling with sequence length made long context windows and high-resolution inputs computationally intractable on standard hardware. Extended training durations and high inference latencies led researchers to abandon transformers in favor of simpler architectures for practical deployment.

Considered and rejected

Considered and rejected: Rejected pure transformer without convolutional layers for raw sensor time series because multi-head attention quadratic scaling makes 10,080-length minute windows infeasible on commodity GPUs

Multimodal Models of Time Series and Text · University of Washington · PhD

Considered and rejected

Considered and rejected: Rejected full transformers for long-context meta-RL due to O(t^2) computational cost and empirical failure to learn on T-LS.

Representations in zero-shot meta-reinforcement learning · Oxford · PhD

Considered and rejected

Considered and rejected: Rejected TD-Transformer (Crossformer) for building-level downstream evaluations due to poorer effectiveness and high compute/training time (20-27h)

Toward Transformer-based Large Energy Models for Smart Energy Management · Virginia Tech · Master's

Considered and rejected

Considered and rejected: Vision Transformer (ViT) model was rejected/not tested on the Project 1640 dataset due to excessive training time required for large 250x250 image sizes.

Using AI to Enable Autonomous Exoplanet Direct Imaging · MIT · PhD

Considered and rejected

Considered and rejected: Rejected Transformer classifier in favor of MLP for practical deployment because Transformer training time was almost 3x longer with identical accuracy (0.977).

A Unified Autotuning Framework for Deep Learning on the Cloud-Edge Continuum · Texas State University · PhD

Considered and rejected

Considered and rejected: Rejected encoder-decoder Transformer architectures in favor of decoder-only models to avoid computational overhead in autoregressive generation and simplify beam search constraints.

Deep Generative Models for Trajectory Prediction and Mobility Network Forecasting · York University · Master's

Left open by the authors

Problems the authors named and did not get to.

Left open

Benchmark and compare the dual temporal attention recurrent model against time-series Transformers for many-to-many sequence prediction. Blocker: None

Recurrence and Temporal Attention Synergy for Optimal Time-Series Modeling and Interpretability · Texas State University · PhD

Left open

Compare Transformer architectures against LSTM networks for financial time-series bubble/jump detection and computer vision document-reading extraction. Blocker: None

Essays in Empirical Asset Pricing · EPFL · PhD

Left open

Mitigate error accumulation in multi-step indoor temperature predictions over long context horizons using the Physical Transformer architecture. Blocker: None

Machine learning on building energy modeling : city and building scale · UT Austin · PhD

Left open

Format ABI and GMI satellite data into time-series sequences and train transformer models to predict temporally linked outputs. Blocker: None

BAYESIAN PATCH TO PATCH PREDICTION FOR SATELLITE IMAGERY · Naval Postgraduate School · Master's

Left open

Train and evaluate transformer-based architectures instead of LSTMs to improve growing degree unit (GDU) prediction accuracy. Blocker: None

Improving crop productivity through data-driven optimization and hybrid deep learning-based approaches · Iowa State · PhD

Left open

Pre-train Transformer-based energy foundation models on web-scale, high-dimensional energy time-series datasets. Blocker: No specific web-scale datasets or architectures are defined beyond a general research direction

Toward Transformer-based Large Energy Models for Smart Energy Management · Virginia Tech · Master's

Left open

Implement generative transformer architectures for time-series biosignal classification. Blocker: None

A Skin-Like Sternal Patch to Monitor Autonomic Tone During Cognitive Stress and Sympathetic Arousals in Disordered Sleep · Georgia Tech · PhD

Left open

Characterize transformer training dynamics on correlated token sequences for next-token prediction using gradient flow analysis. Blocker: None

Towards Newtonian understanding of deep learning training dynamics · UT Austin · PhD

Left open

Establish formal theoretical relationships connecting transformer architectures and diffusion models operating on graphs and manifolds. Blocker: Lacks specific mathematical formulations, conjectures, or defined targets to bridge transformers and diffusion models

MANIFOLD FILTERS AND NEURAL NETWORKS: GEOMETRIC GRAPH SIGNAL PROCESSING IN THE LIMIT · Penn · PhD

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