direct accelerator mass spectrometry (AMS) dating is crucial for a correct integration of plant remains in the (pre)history of crops, particularly for those that do not belong to the Neolithic package and are known to...
详细信息
direct accelerator mass spectrometry (AMS) dating is crucial for a correct integration of plant remains in the (pre)history of crops, particularly for those that do not belong to the Neolithic package and are known to arrive in Europe much later. This paper reviews one of the earliest records of rye from Romania. The grains were discovered in the tell settlement of Cunesti, which belongs to the Gumelni?a communities (ca. 4600-3900 BC). In 1954, due to danube flooding, a large portion of the south part of the tell collapsed, and between the burnt dwelling visible in the resulting profile, a large number of sherds from three typical Gumelni?a pots were identified. According to the excavation's author, rye grains were found in association with those sherds, and it was assumed that a batch was stored in these Eneolithic vessels. Consequently, the rye was published as belonging to the Gumelni?a period. Our reanalysis led to two radiocarbon (C-14) dates, from two different laboratories, which indicate that the Cunesti rye is not prehistoric but dates to the medieval period. To correct this error concerning this rye batch and the implications for European archaeology, we decided to republish these grains in an updated chronological framework. In addition, we performed stable isotope analyses on the charred grains, confirming they were cultivated on dry land, as well as a 3dmorphometric investigation. Our research brings new and original data on rye cultures from the medieval period in southeastern Europe.
Landmark localization of facial soft tissue (FST) is a basic step in 3d morphometric analysis of human face. However, there are few studies on landmark localization of 3d scan images based on deep learning. The method...
详细信息
ISBN:
(纸本)9798350313345;9798350313338
Landmark localization of facial soft tissue (FST) is a basic step in 3d morphometric analysis of human face. However, there are few studies on landmark localization of 3d scan images based on deep learning. The methods based on 2d images cannot be directly applieddue to the non-Euclidean data structure. In this paper, we propose an end-to-end learning framework to automatically localize 28 landmarks on 3dMd scans, called FST-Net. Our method extracts features from texture images and mesh models. New texture mappings for 3dMd scans are generated by projection to fuse texture and structure features. A dual-branch network integrating transformers is applied to predict the landmark heatmaps from coarse to fine. A local coordinate regression module based on probabilistic distance and heatmap predictions is proposed to compute the landmark coordinates. We collect and annotate 297 3dMd face scans from the clinic to evaluate our model. Experiments show that the average localization error of the model is 1.204mm (the clinically acceptable precision range is 1.5 mm), and the correct landmark detection rate equals to 70.89%. Our model outperforms the current state-of-the-art deep learning methods for landmark localization on the mesh model.
BACKGROUNd:Spontaneous bone regeneration after enucleation of osteolytic lesions in the mandible is crucial for healing bone defects. understanding when spontaneous bone regeneration suffices can help clinicians make ...
详细信息
BACKGROUNd:Spontaneous bone regeneration after enucleation of osteolytic lesions in the mandible is crucial for healing bone defects. understanding when spontaneous bone regeneration suffices can help clinicians make informeddecisions.
PURPOSE:This study aimed to assess the extent of spontaneous bone regeneration in post-enucleation mandibular osteolytic lesion cavities using a 3ddigital approach. Secondary objectives included identifying factors like age, lesion size, and anatomical site that could influence regeneration.
STUdY dESIGN:The study included patients aged 18-65 years who underwent enucleation of an osteolytic mandibular lesion, with available pre-treatment and follow-up CBCT scans.
MAIN OUTCOMES:The primary outcome was the percentage of regenerated bone volume (%RBV), calculated using 3d-volumetric analysis. Secondary outcomes included age, gender, lesion volume and site, number of extracted teeth, bone-wall involvement, and follow-up.
RESULTS:The study involved 20 patients, with a mean age of 40.1 ± 16.06 years. %RBV ranged from 32% to 97%, with a mean of 66.95%. Significant predictors of regeneration included age, lesion site, and bone wall involvement.
CONCLUSIONS:Spontaneous bone regeneration can often achieve significant healing even in large defects; understanding the factors influencing this process can guide treatment strategies and improve clinical outcomes.
A person39;s well-being status is reflected by their face through a combination of facial expressions and physical signs. The SEMEOTICONS project translates the semeiotic code of the human face into measurements and...
详细信息
A person's well-being status is reflected by their face through a combination of facial expressions and physical signs. The SEMEOTICONS project translates the semeiotic code of the human face into measurements and computational descriptors that are automatically extracted from images, videos, and three-dimensional scans of the face. SEMEOTICONS developed a multisensory platform in the form of a smart mirror to identify signs related to cardio-metabolic risk. The aim was to enable users to self-monitor their well-being status over time and guide them to improve their lifestyle. Significant scientific and technological challenges have been addressed to build the multisensory mirror, from touchless data acquisition, to real-time processing and integration of multimodal data.
In the recent years personal health monitoring systems have been gaining popularity, both as a result of the pull from the general population, keen to improve well-being and early detection of possibly serious health ...
详细信息
In the recent years personal health monitoring systems have been gaining popularity, both as a result of the pull from the general population, keen to improve well-being and early detection of possibly serious health conditions and the push from the industry eager to translate the current significant progress in computer vision and machine learning into commercial products. One of such systems is the Wize Mirror, built as a result of the FP7 funded SEMEOTICONS (SEMEiotic Oriented Technology for Individuals CardiOmetabolic risk self-assessmeNt and Self-monitoring) project. The project aims to translate the semeiotic code of the human face into computational descriptors and measures, automatically extracted from videos, multispectral images, and3d scans of the face. The multisensory platform, being developed as the result of that project, in the form of a smart mirror, looks for signs related to cardio-metabolic risks. The goal is to enable users to self-monitor their well-being status over time and improve their life-style via tailored user guidance. This paper is focused on the description of the part of that system. utilising computer vision and machine learning techniques to perform 3d morphological analysis of the face and recognition of psycho-somatic status both linked with cardio-metabolic risks. The paper describes the concepts, methods and the developed implementations as well as reports on the results obtained on both real and synthetic datasets. (C) 2016 The Authors. Published by Elsevier Inc.
The face reveals the healthy status of an individual, through a combination of physical signs and facial expressions. The project SEMEOTICONS is translating the semeiotic code of the human face into computational desc...
详细信息
ISBN:
(纸本)9781479970827
The face reveals the healthy status of an individual, through a combination of physical signs and facial expressions. The project SEMEOTICONS is translating the semeiotic code of the human face into computational descriptors and measures, automatically extracted from videos, images, and3d scans of the face. SEMEOTICONS is developing a multisensory platform, in the form of a smart mirror, looking for signs related to cardio-metabolic risk. The goal is to enable users to self-monitor their well-being status over time and improve their life-style via tailored user guidance. Building the multisensory mirror requires addressing significant scientific and technological challenges, from touch-less data acquisition, to real-time processing and integration of multimodal data.
The anisotropic arrangement of trabeculae in the proximal femur of humans and primates is seen as striking evidence for the functional adaptation of trabecular bone architecture. Quantitative evidence to demonstrate t...
详细信息
The anisotropic arrangement of trabeculae in the proximal femur of humans and primates is seen as striking evidence for the functional adaptation of trabecular bone architecture. Quantitative evidence to demonstrate this adaptation for trabecular bone is still scarce, because experimental design of controlled load change is difficult. In this work, we use the natural variation of loading caused by a different main locomotor behavior of primates. Using high-resolution computed tomography and advanced image analysis techniques, we analyze the heterogeneity of the architecture in four proximal femora of four primate species. Although the small sample number does not allow an interspecies comparison, the very differently loaded bones are well suited to search for common structural features as a result of adaptation. A cubic volume of interest of size (5 mm) 3 was moved through the proximal femur and a morphometricanalysis including local anisotropy was performed on 209 positions on average. The correlation of bone volume fraction (BV/TV) with trabecular number (Tb.N) and trabecular thickness (***) leads to the suggestion of two different mechanisms of trabecular bone adaptation. Higher values of BV/TV in highly loaded regions of the proximal femur are due to a thickening of the trabeculae, whereas Tb.N does not change. In less loaded regions, however, lower values of BV/TV are found, caused by a reduction of the number of the trabeculae, whereas *** remains constant. This reduction in Tb.N goes along with an increase in the degree of anisotropy, indicating an adaptive selection of trabeculae. Anat Rec, 294:55-67, 2011. (C) 2010 Wiley-Liss, Inc.
暂无评论