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Benjamin Smarr

Title(s)Associate Professor, Bioengineering
SchoolVc-academic Affairs
Address9500 Gilman Drive #
La Jolla CA 92093
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    Collapse Research 
    Collapse research activities and funding
    Understanding the impact of environmental disruption in biological timing systems through signal processing.
    NIH K99ES027509Sep 30, 2017 - Aug 31, 2019
    Role: Principal Investigator
    The role of circadian stability during development in adult health and behavior
    NIH F32HD081957Nov 16, 2014 - Oct 31, 2017
    Role: Principal Investigator

    Collapse Bibliographic 
    Collapse selected publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help. to make corrections and additions.
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    Altmetrics Details PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Sleep, rest-activity rhythms, and the Charlson Comorbidity Index in the Hispanic Community Health Study/Study of Latinos (HCHS/SOL) and Sueño. Chronobiol Int. 2025 Oct; 42(10):1369-1383. Garduno AC, Patel SR, Gallo LC, Natarajan L, Parada H, McEvoy LK, Smarr B, LaCroix AZ. PMID: 40844118.
      View in: PubMed   Mentions:    Fields:    
    2. A robust machine learning approach to predicting remission and stratifying risk in rheumatoid arthritis patients treated with bDMARDs. Sci Rep. 2025 Jul 04; 15(1):23960. Salehi F, Salin E, Smarr B, Bayat S, Kleyer A, Schett G, Fritsch-Stork R, Eskofier BM. PMID: 40615474; PMCID: PMC12227524.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    3. Testing the Impact of Intensive, Longitudinal Sampling on Assessments of Statistical Power and Effect Size Within a Heterogeneous Human Population: Natural Experiment Using Change in Heart Rate on Weekends as a Surrogate Intervention. J Med Internet Res. 2025 May 21; 27:e60284. Soltani S, Viswanath VK, Kasl P, Hartogensis W, Dilchert S, Hecht FM, Mason AE, Smarr BL. PMID: 40397926; PMCID: PMC12138295.
      View in: PubMed   Mentions:    Fields:    Translation:HumansCells
    4. Sex Differences in the Variability of Physical Activity Measurements Across Multiple Timescales Recorded by a Wearable Device: Observational Retrospective Cohort Study. J Med Internet Res. 2025 Apr 28; 27:e66231. Varner KJ, Keeler Bruce L, Soltani S, Hartogensis W, Dilchert S, Hecht FM, Chowdhary A, Pandya L, Dasgupta S, Altintas I, Gupta A, Mason AE, Smarr BL. PMID: 40293784; PMCID: PMC12070018.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    5. Twenty-four-hour Skin Temperature Rhythms in Young People With Emerging Mood Disorders: Relationships With Illness Subtypes and Clinical Stage. J Biol Rhythms. 2025 06; 40(3):262-274. Shin M, Carpenter JS, Park SH, Janiszewski C, Tonini E, McKenna S, Hindmarsh G, Iorfino F, Nichles A, Zmicerevska N, Scott EM, Smarr BL, Hickie IB, Crouse JJ. PMID: 40285489; PMCID: PMC12085744.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    6. Chronobiologically-informed features from CGM data provide unique information for XGBoost prediction of longer-term glycemic dysregulation in 8,000 individuals with type-2 diabetes. PLOS Digit Health. 2025 Apr; 4(4):e0000815. Burks JH, Joe L, Kanjaria K, Monsivais C, O'laughlin K, Smarr BL. PMID: 40202975; PMCID: PMC11981153.
      View in: PubMed   Mentions:
    7. Augmenting Circadian Biology Research With Data Science. J Biol Rhythms. 2025 04; 40(2):143-170. Soltani S, Burks JH, Smarr BL. PMID: 39878301; PMCID: PMC11915776.
      View in: PubMed   Mentions:    Fields:    Translation:HumansAnimals
    8. Clinical validation of a wearable ultrasound sensor of blood pressure. Nat Biomed Eng. 2025 Jun; 9(6):865-881. Zhou S, Park G, Longardner K, Lin M, Qi B, Yang X, Gao X, Huang H, Chen X, Bian Y, Hu H, Wu RS, Yue W, Li M, Lu C, Wang R, Qin S, Tasali E, Karrison T, Thomas I, Smarr B, Kistler EB, Khiami BA, Litvan I, Xu S. PMID: 39567702.
      View in: PubMed   Mentions: 8     Fields:    Translation:Humans
    9. Exposure to constant artificial light alters honey bee sleep rhythms and disrupts sleep. Sci Rep. 2024 11 12; 14(1):25865. Kim AY, Velazquez A, Saavedra B, Smarr B, Nieh JC. PMID: 39532897; PMCID: PMC11557972.
      View in: PubMed   Mentions:    Fields:    Translation:Animals
    10. Biometrics of complete human pregnancy recorded by wearable devices. NPJ Digit Med. 2024 Aug 12; 7(1):207. Keeler Bruce L, González D, Dasgupta S, Smarr BL. PMID: 39134787; PMCID: PMC11319646.
      View in: PubMed   Mentions:
    11. Remote illness detection faces a trust barrier. Lancet Digit Health. 2024 08; 6(8):e537-e538. Smarr BL. PMID: 39059883.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    12. Five million nights: temporal dynamics in human sleep phenotypes. NPJ Digit Med. 2024 Jun 20; 7(1):150. Viswanath VK, Hartogenesis W, Dilchert S, Pandya L, Hecht FM, Mason AE, Wang EJ, Smarr BL. PMID: 38902390; PMCID: PMC11190239.
      View in: PubMed   Mentions: 4  
    13. Information theory reveals physiological manifestations of COVID-19 that correlate with symptom density of illness. Front Netw Physiol. 2024; 4:1211413. Ryan JM, Navaneethan S, Damaso N, Dilchert S, Hartogensis W, Natale JL, Hecht FM, Mason AE, Smarr BL. PMID: 38948084; PMCID: PMC11211556.
      View in: PubMed   Mentions:
    14. Author Correction: Elevated body temperature is associated with depressive symptoms: results from the TemPredict Study. Sci Rep. 2024 Apr 29; 14(1):9819. Mason AE, Kasl P, Soltani S, Green A, Hartogensis W, Dilchert S, Chowdhary A, Pandya LS, Siwik CJ, Foster SL, Nyer M, Lowry CA, Raison CL, Hecht FM, Smarr BL. PMID: 38684772; PMCID: PMC11059352.
      View in: PubMed   Mentions:    Fields:    
    15. Utilizing Wearable Device Data for Syndromic Surveillance: A Fever Detection Approach. Sensors (Basel). 2024 Mar 12; 24(6). Kasl P, Keeler Bruce L, Hartogensis W, Dasgupta S, Pandya LS, Dilchert S, Hecht FM, Gupta A, Altintas I, Mason AE, Smarr BL. PMID: 38544080; PMCID: PMC10975930.
      View in: PubMed   Mentions: 1     Fields:    Translation:HumansPHPublic Health
    16. Divergent Circadian Foraging Strategies in Response to Diurnal Predation Versus Persistent Rain in Asian Weaver Ant, Oecophylla smaragdina, Suggest Possible Energetic Trade-offs. J Biol Rhythms. 2024 06; 39(3):295-307. Dolai A, Soltani S, Smarr B, Das A. PMID: 38459718; PMCID: PMC11139593.
      View in: PubMed   Mentions: 1     Fields:    Translation:Animals
    17. Elevated body temperature is associated with depressive symptoms: results from the TemPredict Study. Sci Rep. 2024 02 05; 14(1):1884. Mason AE, Kasl P, Soltani S, Green A, Hartogensis W, Dilchert S, Chowdhary A, Pandya LS, Siwik CJ, Foster SL, Nyer M, Lowry CA, Raison CL, Hecht FM, Smarr BL. PMID: 38316806; PMCID: PMC10844227.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    18. Correction: Variability of temperature measurements recorded by a wearable device by biological sex. Biol Sex Differ. 2023 Nov 13; 14(1):82. Bruce LK, Kasl P, Soltani S, Viswanath VK, Hartogensis W, Dilchert S, Hecht FM, Chowdhary A, Anglo C, Pandya L, Dasgupta S, Altintas I, Gupta A, Mason AE, Smarr BL. PMID: 37957715; PMCID: PMC10641950.
      View in: PubMed   Mentions:    Fields:    
    19. Variability of temperature measurements recorded by a wearable device by biological sex. Biol Sex Differ. 2023 11 01; 14(1):76. Bruce LK, Kasl P, Soltani S, Viswanath VK, Hartogensis W, Dilchert S, Hecht FM, Chowdhary A, Anglo C, Pandya L, Dasgupta S, Altintas I, Gupta A, Mason AE, Smarr BL. PMID: 37915069; PMCID: PMC10619297.
      View in: PubMed   Mentions: 3     Fields:    Translation:HumansAnimals
    20. Assessing Adherence to Multi-Modal Oura Ring Wearables From COVID-19 Detection Among Healthcare Workers. Cureus. 2023 Sep; 15(9):e45362. Shiba SK, Temple CA, Krasnoff J, Dilchert S, Smarr BL, Robishaw J, Mason AE. PMID: 37849583; PMCID: PMC10578453.
      View in: PubMed   Mentions: 2  
    21. Despite shutdown hardships, remote learning may support some healthier student sleep behaviors. Sleep. 2023 07 11; 46(7). Smarr BL. PMID: 37144822; PMCID: PMC10334731.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    22. Modified Wavelet Analyses Permit Quantification of Dynamic Interactions Between Ultradian and Circadian Rhythms. J Biol Rhythms. 2022 12; 37(6):631-654. Riggle JP, Kay LM, Onishi KG, Falk DT, Smarr BL, Zucker I, Prendergast BJ. PMID: 36380564; PMCID: PMC11024927.
      View in: PubMed   Mentions: 2     Fields:    Translation:Animals
    23. Methods for detecting probable COVID-19 cases from large-scale survey data also reveal probable sex differences in symptom profiles. Front Big Data. 2022; 5:1043704. Klein A, Puldon K, Dilchert S, Hartogensis W, Chowdhary A, Anglo C, Pandya LS, Hecht FM, Mason AE, Smarr BL. PMID: 36438983; PMCID: PMC9685297.
      View in: PubMed   Mentions: 1  
    24. Analysis of wearable time series data in endocrine and metabolic research. Curr Opin Endocr Metab Res. 2022 Aug; 25:100380. Grant AD, Upton TJ, Terry JR, Smarr BL, Zavala E. PMID: 36632470; PMCID: PMC9823090.
      View in: PubMed   Mentions: 3  
    25. Female mice exhibit less overall variance, with a higher proportion of structured variance, than males at multiple timescales of continuous body temperature and locomotive activity records. Biol Sex Differ. 2022 07 23; 13(1):41. Smarr B, Kriegsfeld LJ. PMID: 35870975; PMCID: PMC9308033.
      View in: PubMed   Mentions: 24     Fields:    Translation:HumansAnimals
    26. Measuring Health-Related Quality of Life With Multimodal Data: Viewpoint. J Med Internet Res. 2022 05 26; 24(5):e35951. Clay I, Cormack F, Fedor S, Foschini L, Gentile G, van Hoof C, Kumar P, Lipsmeier F, Sano A, Smarr B, Vandendriessche B, De Luca V. PMID: 35617003; PMCID: PMC9185357.
      View in: PubMed   Mentions: 4     Fields:    Translation:Humans
    27. Feasibility of continuous distal body temperature for passive, early pregnancy detection. PLOS Digit Health. 2022 May; 1(5):e0000034. Grant A, Smarr B. PMID: 36812529; PMCID: PMC9931282.
      View in: PubMed   Mentions: 12  
    28. Author Correction: Detection of COVID-19 using multimodal data from a wearable device: results from the first TemPredict Study. Sci Rep. 2022 Mar 16; 12(1):4568. Mason AE, Hecht FM, Davis SK, Natale JL, Hartogensis W, Damaso N, Claypool KT, Dilchert S, Dasgupta S, Purawat S, Viswanath VK, Klein A, Chowdhary A, Fisher SM, Anglo C, Puldon KY, Veasna D, Prather JG, Pandya LS, Fox LM, Busch M, Giordano C, Mercado BK, Song J, Jaimes R, Baum BS, Telfer BA, Philipson CW, Collins PP, Rao AA, Wang EJ, Bandi RH, Choe BJ, Epel ES, Epstein SK, Krasnoff JB, Lee MB, Lee SW, Lopez GM, Mehta A, Melville LD, Moon TS, Mujica-Parodi LR, Noel KM, Orosco MA, Rideout JM, Robishaw JD, Rodriguez RM, Shah KH, Siegal JH, Gupta A, Altintas I, Smarr BL. PMID: 35296773; PMCID: PMC8926096.
      View in: PubMed   Mentions: 3     Fields:    
    29. Author Correction: Feasibility of continuous fever monitoring using wearable devices. Sci Rep. 2022 Mar 15; 12(1):4427. Smarr BL, Aschbacher K, Fisher SM, Chowdhary A, Dilchert S, Puldon K, Rao A, Hecht FM, Mason AE. PMID: 35292699; PMCID: PMC8924266.
      View in: PubMed   Mentions:    Fields:    
    30. Detection of COVID-19 using multimodal data from a wearable device: results from the first TemPredict Study. Sci Rep. 2022 03 02; 12(1):3463. Mason AE, Hecht FM, Davis SK, Natale JL, Hartogensis W, Damaso N, Claypool KT, Dilchert S, Dasgupta S, Purawat S, Viswanath VK, Klein A, Chowdhary A, Fisher SM, Anglo C, Puldon KY, Veasna D, Prather JG, Pandya LS, Fox LM, Busch M, Giordano C, Mercado BK, Song J, Jaimes R, Baum BS, Telfer BA, Philipson CW, Collins PP, Rao AA, Wang EJ, Bandi RH, Choe BJ, Epel ES, Epstein SK, Krasnoff JB, Lee MB, Lee SW, Lopez GM, Mehta A, Melville LD, Moon TS, Mujica-Parodi LR, Noel KM, Orosco MA, Rideout JM, Robishaw JD, Rodriguez RM, Shah KH, Siegal JH, Gupta A, Altintas I, Smarr BL. PMID: 35236896; PMCID: PMC8891385.
      View in: PubMed   Mentions: 36     Fields:    Translation:HumansCells
    31. Metrics from Wearable Devices as Candidate Predictors of Antibody Response Following Vaccination against COVID-19: Data from the Second TemPredict Study. Vaccines (Basel). 2022 Feb 09; 10(2). Mason AE, Kasl P, Hartogensis W, Natale JL, Dilchert S, Dasgupta S, Purawat S, Chowdhary A, Anglo C, Veasna D, Pandya LS, Fox LM, Puldon KY, Prather JG, Gupta A, Altintas I, Smarr BL, Hecht FM. PMID: 35214723; PMCID: PMC8877860.
      View in: PubMed   Mentions: 16  
    32. Lower variability in female students than male students at multiple timescales supports the use of sex as a biological variable in human studies. Biol Sex Differ. 2021 04 22; 12(1):32. Smarr BL, Ishami AL, Schirmer AE. PMID: 33888158; PMCID: PMC8061019.
      View in: PubMed   Mentions: 9     Fields:    Translation:Humans
    33. Maternal stress during pregnancy alters fetal cortico-cerebellar connectivity in utero and increases child sleep problems after birth. Sci Rep. 2021 01 26; 11(1):2228. van den Heuvel MI, Hect JL, Smarr BL, Qawasmeh T, Kriegsfeld LJ, Barcelona J, Hijazi KE, Thomason ME. PMID: 33500446; PMCID: PMC7838320.
      View in: PubMed   Mentions: 36     Fields:    Translation:Humans
    34. Feasibility of continuous fever monitoring using wearable devices. Sci Rep. 2020 12 14; 10(1):21640. Smarr BL, Aschbacher K, Fisher SM, Chowdhary A, Dilchert S, Puldon K, Rao A, Hecht FM, Mason AE. PMID: 33318528; PMCID: PMC7736301.
      View in: PubMed   Mentions: 63     Fields:    Translation:Humans
    35. Using Circadian Rhythm Patterns of Continuous Core Body Temperature to Improve Fertility and Pregnancy Planning. J Circadian Rhythms. 2020 Sep 24; 18:5. Webster WW, Smarr B. PMID: 33024445; PMCID: PMC7518073.
      View in: PubMed   Mentions: 13  
    36. Circadian dysfunction in the Q175 model of Huntington's disease: Network analysis. J Neurosci Res. 2019 12; 97(12):1606-1623. Smarr B, Cutler T, Loh DH, Kudo T, Kuljis D, Kriegsfeld L, Ghiani CA, Colwell CS. PMID: 31359503; PMCID: PMC7105276.
      View in: PubMed   Mentions: 16     Fields:    Translation:AnimalsCells
    37. Male and female mice show equal variability in food intake across 4-day spans that encompass estrous cycles. PLoS One. 2019; 14(7):e0218935. Smarr B, Rowland NE, Zucker I. PMID: 31306437; PMCID: PMC6629064.
      View in: PubMed   Mentions: 10     Fields:    Translation:Animals
    38. Evidence for a Coupled Oscillator Model of Endocrine Ultradian Rhythms. J Biol Rhythms. 2018 10; 33(5):475-496. Grant AD, Wilsterman K, Smarr BL, Kriegsfeld LJ. PMID: 30132387; PMCID: PMC6425759.
      View in: PubMed   Mentions: 23     Fields:    Translation:HumansAnimals
    39. 3.4 million real-world learning management system logins reveal the majority of students experience social jet lag correlated with decreased performance. Sci Rep. 2018 03 29; 8(1):4793. Smarr BL, Schirmer AE. PMID: 29599506; PMCID: PMC5876324.
      View in: PubMed   Mentions: 25     Fields:    Translation:Humans
    40. Artifact Rejection Methodology Enables Continuous, Noninvasive Measurement of Gastric Myoelectric Activity in Ambulatory Subjects. Sci Rep. 2018 03 22; 8(1):5019. Gharibans AA, Smarr BL, Kunkel DC, Kriegsfeld LJ, Mousa HM, Coleman TP. PMID: 29568042; PMCID: PMC5864836.
      View in: PubMed   Mentions: 30     Fields:    Translation:Humans
    41. Maternal and Early-Life Circadian Disruption Have Long-Lasting Negative Consequences on Offspring Development and Adult Behavior in Mice. Sci Rep. 2017 06 12; 7(1):3326. Smarr BL, Grant AD, Perez L, Zucker I, Kriegsfeld LJ. PMID: 28607386; PMCID: PMC5468226.
      View in: PubMed   Mentions: 41     Fields:    Translation:AnimalsCells
    42. Sex differences in variability across timescales in BALB/c mice. Biol Sex Differ. 2017; 8:7. Smarr BL, Grant AD, Zucker I, Prendergast BJ, Kriegsfeld LJ. PMID: 28203366; PMCID: PMC5301430.
      View in: PubMed   Mentions: 39     Fields:    Translation:Animals
    43. Detection of Successful and Unsuccessful Pregnancies in Mice within Hours of Pairing through Frequency Analysis of High Temporal Resolution Core Body Temperature Data. PLoS One. 2016; 11(7):e0160127. Smarr BL, Zucker I, Kriegsfeld LJ. PMID: 27467519; PMCID: PMC4965159.
      View in: PubMed   Mentions: 28     Fields:    Translation:Animals
    44. Digital sleep logs reveal potential impacts of modern temporal structure on class performance in different chronotypes. J Biol Rhythms. 2015 Feb; 30(1):61-7. Smarr BL. PMID: 25564433.
      View in: PubMed   Mentions: 11     Fields:    Translation:Humans
    45. A time to remember: the role of circadian clocks in learning and memory. Behav Neurosci. 2014 Jun; 128(3):283-303. Smarr BL, Jennings KJ, Driscoll JR, Kriegsfeld LJ. PMID: 24708297; PMCID: PMC4385793.
      View in: PubMed   Mentions: 90     Fields:    Translation:AnimalsCells
    46. Oestrogen-independent circadian clock gene expression in the anteroventral periventricular nucleus in female rats: possible role as an integrator for circadian and ovarian signals timing the luteinising hormone surge. J Neuroendocrinol. 2013 Dec; 25(12):1273-1279. Smarr BL, Gile JJ, de la Iglesia HO. PMID: 24028332; PMCID: PMC3954464.
      View in: PubMed   Mentions: 25     Fields:    Translation:AnimalsCells
    47. Forced desynchrony reveals independent contributions of suprachiasmatic oscillators to the daily plasma corticosterone rhythm in male rats. PLoS One. 2013; 8(7):e68793. Wotus C, Lilley TR, Neal AS, Suleiman NL, Schmuck SC, Smarr BL, Fischer BJ, de la Iglesia HO. PMID: 23894346; PMCID: PMC3718825.
      View in: PubMed   Mentions: 19     Fields:    Translation:AnimalsCells
    48. Re-examining "temporal niche". Integr Comp Biol. 2013 Jul; 53(1):165-74. Smarr BL, Schwartz MD, Wotus C, de la Iglesia HO. PMID: 23674555; PMCID: PMC3687136.
      View in: PubMed   Mentions: 9     Fields:    Translation:Animals
    49. The dorsomedial suprachiasmatic nucleus times circadian expression of Kiss1 and the luteinizing hormone surge. Endocrinology. 2012 Jun; 153(6):2839-50. Smarr BL, Morris E, de la Iglesia HO. PMID: 22454148; PMCID: PMC3359594.
      View in: PubMed   Mentions: 38     Fields:    Translation:AnimalsCells
    50. The combination of chemical fixation procedures with high pressure freezing and freeze substitution preserves highly labile tissue ultrastructure for electron tomography applications. J Struct Biol. 2008 Mar; 161(3):359-71. Sosinsky GE, Crum J, Jones YZ, Lanman J, Smarr B, Terada M, Martone ME, Deerinck TJ, Johnson JE, Ellisman MH. PMID: 17962040; PMCID: PMC2459253.
      View in: PubMed   Mentions: 63     Fields:    Translation:AnimalsCells
    51. Light and electron microscopic localization of multiple proteins using quantum dots. Methods Mol Biol. 2007; 374:43-53. Deerinck TJ, Giepmans BN, Smarr BL, Martone ME, Ellisman MH. PMID: 17237528.
      View in: PubMed   Mentions: 14     Fields:    Translation:Animals
    52. Redefining the concept of reactive astrocytes as cells that remain within their unique domains upon reaction to injury. Proc Natl Acad Sci U S A. 2006 Nov 14; 103(46):17513-8. Wilhelmsson U, Bushong EA, Price DL, Smarr BL, Phung V, Terada M, Ellisman MH, Pekny M. PMID: 17090684; PMCID: PMC1859960.
      View in: PubMed   Mentions: 294     Fields:    Translation:AnimalsCells
    53. Correlated light and electron microscopic imaging of multiple endogenous proteins using Quantum dots. Nat Methods. 2005 Oct; 2(10):743-9. Giepmans BN, Deerinck TJ, Smarr BL, Jones YZ, Ellisman MH. PMID: 16179920.
      View in: PubMed   Mentions: 134     Fields:    Translation:AnimalsCells
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