I Will Perform Bimodal Spectral Analysis on Your Time Series and Deliver an Anchor Score Report

## Bimodal Spectral Analysis for Single-Channel Time Series

I provide a model-free analysis service that detects **bimodal spectral structure** — two frequency peaks separated by a valley — in single-channel time series. The method is based on a published preprint (DOI: 10.5281/zenodo.22850972).

Most standard methods (power spectral density, coefficient of variation, sample entropy, coherence) only measure total power, stability, or coupling. They do NOT detect whether a signal contains two distinct oscillatory modes separated by a valley. This service fills that gap.

### What you get

- **Anchor score** (0–1): a single number indicating how strongly bimodal structure is present
- **Peak frequencies** (f1, f2) in Hz
- **Full analysis report** (PDF)
- Optional: batch analysis for multiple channels or multiple files

### What we do NOT provide

- Algorithm source code
- Exact parameter values
- Tuning methods or implementation details

The core algorithm and its parameter settings are retained as a commercial asset. Only the analysis results are delivered.

### Validated performance

- **Synthetic signals**: correctly separates single-peak, bimodal, and noise
- **LIGO O1/O4c1 detector data**: no false positives on broadband noise
- **24-subject meditation EEG dataset** (OpenNeuro ds001787):
- Expert vs novice group difference: p = 0.034
- Five conventional methods (theta power, CV, sample entropy, coherence, naive peak counting) were **not** significant (all p > 0.2)
- Cross-validation across parameters, frequency bands, window lengths, and channel subsets confirmed stability

### Input requirements

- Single-channel time series in CSV format (one column of values)
- Sampling rate (Hz)
- Frequency band of interest (e.g., 3–8 Hz, 50–80 Hz, etc.)

### Delivery time

- Single analysis: within 24 hours
- Batch analysis (10+ files): 3–5 business days

### Potential applications

- **EEG / neuroscience**: meditation research, sleep staging, anesthesia monitoring, neurological disorder detection
- **Mechanical engineering**: vibration monitoring, fault detection, rotating machinery
- **Finance / economics**: regime shift detection, cyclical component analysis
- **Any single-channel time series** where two frequency components carry information

### Pricing

- Single analysis (1 file): $80 USD
- Batch analysis (10+ files): from $600 USD
- Long-term collaboration / API integration: contact for quote

### Contact

ORCID: 0009-0008-4540-1381
[Your email or preferred contact method]

### Disclaimer

This service provides data analysis results only. It does not constitute medical diagnosis, financial advice, or investment recommendation. Results are for research and informational purposes.