Initial Investigations of Hyperspectral Remote Sensing for Postmortem Interval Estimations in Forensic Entomology
Notice bibliographique
Résumé
After attending this presentation, attendees will be introduced to the initial applications of hyperspectral remote sensing to forensic entomology and understand its potential for increasing the precision of current immature blow fly age estimates and successively increasing the accuracy of postmortem interval estimates.\nThis presentation will impact the forensic science community by illustrating the opportunities offered by hyperspectral remote sensing into an entirely new area, entomology, and its possible future potential value in forensic or medicolegal entomology.\nCurrent methods examining dipteran larval development to estimate minimum elapsed time since death are based on a minimum tenure of the insects on the body. Immature blow flies develop at a predictable rate and, based on the insect stage, a minimum postmortem interval is estimated. Unfortunately, in some instances, because some of the stages can be lengthy, only a crude estimate can be provided. This initial proof of concept investigation examines the use of hyperspectral remote sensing to reduce the estimate in the postmortem interval. The use of hyperspectral remote sensing in forensic entomology is unheard of, but remote sensing is successfully being applied to many other sciences including many forensic sciences. The objective of this investigation was to examine the use of hyperspectral remote sensing in increasing the precision of current blow fly (Diptera: Calliphoridae) age estimates and consequently increasing the accuracy of postmortem interval estimates.\nDaily spectral measurements of immature Protophormia terraenovae (R-D), a common blow fly, spanned the 325 – 1025nm range but the measurements were condensed to reduce excessive noise. Measurements were obtained using a handheld spectrometer once daily. Immature development was examined in two parts due to time constraints. Measurements were obtained from second instar to the pupal stage and from the beginning of the pupal stage until adult emergence. The adult colony was raised on milk powder, sugar, and water ad libitum. A CMP 4030 Conviron chamber was used to maintain the adult colony as well as the experimental animals. Development occurred at 25°C, a 14:10 (L:D) photoperiod of 20µmol of light and a relative humidity of 75%. The immature insects were raised on milk-fed veal liver in the Phytotron at McGill University, and then insects were transported daily to the spectrometer for measurement. Despite the transport, the average temperature recorded by a data logger remained at 24.6°C. Matlab R2011b and PRtools 4.1 were used to complete the spectral analysis. Also, a fourth order polynomial Satvitsky-Golay smoothing filter was applied. A forward feature selection was used to designate the top 25 discriminating bands.\nThis proof of concept investigation introduces a comparison of how the spectral signatures of P. terraenovae change from day to day within the immature stages. The results are more than promising and show a potential method for narrowing the original estimates and offering a better overall estimate of insect age, and therefore, postmortem interval estimation.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,001 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».