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3 papersLast indexed Aug 31, 2026
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Aug 21, 2026·Enigma in Economics
0 cites
Adaptive Quantile Calibration of Daily and Weekly Cycle-Low Forecasts in Bitcoin, S&P 500 Futures, and Gold

Muhammad Faiz, Sonia Vernanda

Background. Market-cycle forecasts are vulnerable to hindsight because a low becomes identifiable only after subsequent price confirmation. Objective. This study evaluated whether an adaptive, confirmation-aware interval could attain at least 80% chronological forecast precision for daily cycle lows (DCLs) and weekly cycle lows (WCLs) in Bitcoin, S&P 500 futures, and gold. Methods. The Adaptive Quantile-Calibrated Cycle Window used only the latest 20 completed cycles. Its lower endpoint was the empirical 10th percentile of prior low-to-low durations, and its upper endpoint was the 90th percentile of prior-low-to-next-confirmation durations. Forecasts originating from 1 January 2021 through 14 July 2026 were evaluated sequentially, and the retrospective protocol was externally preregistered. Results. Fixed clocks achieved 70.9% DCL precision and 55.6% WCL precision. The adaptive interval achieved 109/127 DCL hits (85.8%; 95% CI 78.7%–90.8%) and 27/27 WCL hits (100.0%; 95% CI 87.5%–100.0%). Mean window width increased from 14.7 to 32.8 days for DCL and from 4.0 to 11.7 weeks for WCL. A wider 5th–95th percentile band produced 93.7% DCL precision with a 95% lower confidence bound of 88.1%. Conclusion. Adaptive interval calibration exceeded the 80% point target, but the gain depended on materially wider windows and a small WCL sample; prospective replication remains necessary.

Open access
2 source records
Circadian rhythm and melatonin
Forecasting Techniques and Applications
Climate Change and Health Impacts
Original source
Jan 19, 2026·Longevity Horizon
6 cites
Strategic Timekeepers

Jaba Tkemaladze

For over a century, centrioles have been defined by their role as architects of the mitotic spindle. This review synthesizes contemporary evidence to propose a paradigm shift: centrioles are strategic timekeepers of the cell. They function not as simple clocks but as custodians of cellular time, encoding a history of divisions and stresses through accumulating post-translational modifications and proteomic changes. This molecular archive, stored on one of the cell's most stable structures, is subsequently interpreted by the cell via mechanical, signaling, and proteostatic pathways to dictate fundamental fate decisions—proliferation, differentiation, senescence, or apoptosis. This centriolar timekeeping function operates across a hierarchy, interacting with circadian oscillators, telomeric and epigenetic clocks, and crucially influencing organismal aging through its role in stem cell fate and asymmetric division. We develop an integrative "Centriolar Timeline" model, describing how the accrual of neutral (maturity) and pathological (damage) marks directs cellular trajectories. This model positions the centriole as a unique bio-physical interface that transforms linear chronological time into non-linear biological fate. Re-conceptualizing centrioles as central processors of temporal information has profound implications for understanding development, aging, and diseases like cancer, and suggests novel therapeutic avenues in regenerative medicine and gerontology aimed at modulating this deep-time cellular memory. The Centrosomal Ledger hypothesis is inherently untestable without omics-based approaches, as it posits that cellular memory is encoded not in single molecular markers but in distributed, multivariate structural states of the centrosome. Only system-level omics analyses can capture the weak yet coordinated molecular patterns, temporal integration, and state-dependent signatures required to render this model experimentally falsifiable

Open access
Microtubule and mitosis dynamics
Circadian rhythm and melatonin
Plant Molecular Biology Research
Original source
Feb 1, 2004·Current Biology
82 cites
Early embryonic light detection improves survival

T. Katherine Tamai, Varut Vardhanabhuti, Nicholas S. Foulkes, David Whitmore

No abstract is available for this record.

Open access
Circadian rhythm and melatonin
Photoreceptor and optogenetics research
Spaceflight effects on biology
Original source