scholarly journals Evaluation of the vital state of Magnolia grandiflora L. in the Arboretum of the Nikitsky Botanical Gardens using the method of ultrasound tomography

2020 ◽  
pp. 7-16
Author(s):  
Yu. V. Plugatar ◽  
V. N. Gerasimchuk
Keyword(s):  
Old Age ◽  
Complete Information ◽  
Visual Assessment ◽  
Two Dimensional ◽  
Ultrasound Tomography ◽  
Magnolia Grandiflora ◽  
Botanical Gardens ◽  
Vital State ◽  
Tomography Method ◽  
Old Trees

As a result of instrumental diagnostics of the state of trunk wood, the level of phytopathogenic damage of the most old-age specimens of Magnolia grandiflora L. in the Arboretum of the Nikitsky Botanical Gardens is estimated. Digital two-dimensional images of the trunk wood were obtained, and the relative indicators of the degree of its destruction were characterized. The results of the research allowed us to identify some patterns in the nature of the distribution of destructions in the trunk wood of M. grandiflora . It was found that of the six studied specimens of M. grandiflora , the greatest destruction of trunk wood was found in two 130-year-old trees growing in The Upper Arboretum Park. There was no correlation between the presence and degree of destruction of M. grandiflora trunk wood and the age of the trees examined. The use of the ultrasound tomography method expands the possibilities of diagnostics of phytopathogenic lesion of the trunk wood. The combination of visual assessment and instrumental diagnostics of trunk wood allows us to obtain more complete information about the vital state of trees.

scholarly journals The influence of edaphic factors on the vital state of large-flowered magnolia (Magnolia grandiflora L.). in the Nikitsky Botanical Gardens

2021 ◽  
pp. 16-24
Author(s):  
V. N. Gerasimchuk ◽  
M. L. Novitsky
Keyword(s):  
Skeletal Structure ◽  
Soil Conditions ◽  
Edaphic Factors ◽  
Magnolia Grandiflora ◽  
Botanical Gardens ◽  
The Crimea ◽  
Vital State ◽  
Few Data ◽  
High Level ◽  
Positive Effect

The most widespread magnolia on the Southern coast of the Crimea and, in particular, in the Arboretum of the Nikitsky Botanical Gardens is the evergreen Magnolia grandiflora L., introduced in 1817. Currently, 28 generative specimens of Magnolia grandiflora of different ages grow in the Arboretum, including garden forms with different vital state. There are very few data on the relation of this species to soil conditions. For this reason, we have studied the influence of edaphic factors on the vital state of Magnolia grandiflora growing in the Arboretum of the Nikitsky Botanical Gardens. A number of limiting edaphic factors have been identified, the main of which is the high skeletal structure of the soil. The humus reserves in the soil have a positive effect on the vital state of trees. A high level of agricultural technology is the main method of improving the vital state of Magnolia grandiflora .

scholarly journals Assessment of phytopathological state of woody plants by ultrasound diagnostics

2019 ◽  
pp. 31-38
Author(s):  
O. I. Korotkov ◽  
V. N. Gerasimchuk ◽  
V. A. Belyakov ◽  
Y. A. Gavrilenko ◽  
D. S. Gardt ◽  
...  
Keyword(s):  
Woody Plants ◽  
Negative Impact ◽  
Life Time ◽  
Cupressus Sempervirens ◽  
Ultrasound Tomography ◽  
Magnolia Grandiflora ◽  
Morus Nigra ◽  
Vital Functions ◽  
Ultrasound Diagnostics ◽  
Significant Factors

The state of the wood trunk tissue of trees Cupressus sempervirens 'Stricta', Morus nigra L., Magnólia grandiflóra L., Carpinus orientalis Mill., growing in the Park of the Educational center "Sirius" (Sochi) was determined with the use of complex acoustic ultrasound tomography ARBOTOM® ABT05-S. It was revealed that these species were characterized by a significant differentiation in the degree of damage to bracket fungi. Low level of phytopathogenic damage was observed in Carpinus orientalis . The trunk wood of Morus nigra was characterized by the highest rates of phytopathogenic damage. The negative impact of bracket fungi is one of the most significant factors that reduce vital functions and reduce the life of many species of woody plants. Phytopathogenic damage to wood and trunk rot formation and voids have an impact on the growth and development of plants, reducing their life time, and can lead to death and fall of a tree, which within the urban environment is a potential danger to people.

scholarly journals Ancient parks and gardens of Northern and Eastern India

2021 ◽  
pp. 110-118
Author(s):  
S. Y. Kazarova ◽  
G. A. Novitskaya
Keyword(s):  
Old Age ◽  
Tree Species ◽  
West Bengal ◽  
Full Description ◽  
Eastern India ◽  
Botanical Gardens ◽  
Northern India ◽  
Historical Objects

The 30 ancient gardens of Northern India were studied: 9 palace gardens, 13 memorial gardens (at tombs), 8 gardens of “royal rest”, and 2 ancient botanical gardens of West Bengal (East India) for 11 years (from 2008 to 2019). Brief information is given for each object: the year of the garden' s foundation, the size, historical objects on the territory of the park (garden), the presence of old-age trees and some tree species is noted; inaccessible and / or rarely visited ancient gardens are described in more detail (Mughal Gardens in Delhi, Yadavindra Gardens in Pinjor and others). A full description of the ancient gardens (parks) of India is given in the publications of the authors, a list of which is given.

scholarly journals Two-dimensional and contrast-enhanced ultrasound of intestinal ischaemia in cats: four cases

2019 ◽  
Vol 22 (4) ◽  
pp. 384-390
Author(s):  
Nikolina Linta ◽  
Marco Baron Toaldo ◽  
Sara Del Magno ◽  
Pascaline Pey ◽  
Manuela Quinci ◽  
...  
Keyword(s):  
Power Doppler ◽  
Abdominal Ultrasound ◽  
Visual Assessment ◽  
Intestinal Wall ◽  
Wall Thickening ◽  
Power Doppler Ultrasonography ◽  
Two Dimensional ◽  
Intestinal Ischaemia ◽  
Intestinal Lesions ◽  
Iatrogenic Damage

Objectives The aim of this study was to describe the results of two-dimensional (2D) and contrast-enhancement ultrasound (CEUS) in four cats with intestinal ischaemia. Methods Data were collected from hospital records of all cats that had intestinal ischaemia between January 2012 and August 2018. The inclusion criteria were complete abdominal ultrasound examination, colour flow Doppler and CEUS of lesions, confirmation of intestinal ischaemia detected by visual assessment of avascular intestinal segment at surgery, and/or necropsy and histopathology. All images and video clips were reviewed by the same experienced operator. Results Four cats with different intestinal ischaemic lesions were included in the study: duodenal perforating ulcer, jejunal necrotising enteritis, necrosis secondary to jejunojejunal intussusception and iatrogenic damage of jejunal arteries. On the 2D ultrasound, all intestinal lesions were characterised by non-specific findings: focal hypoechoic wall thickening with loss of normal layering associated with hyperechoic mesentery surrounding the intestinal tract. CEUS showed a reduced or absent enhancement of the intestinal lesions in comparison to the surrounding perfused wall. Conclusions and relevance Intestinal ischaemia is a potentially fatal disorder. Grey-scale, colour and power Doppler ultrasonography are not sensitive for evaluating this condition. Our preliminary findings illustrate the usefulness of CEUS for the detection of intestinal wall impaired perfusion in cats.

scholarly journals The feasibility, reliability, and incremental value of two-dimensional speckle-tracking for the detection of significant coronary stenosis after treadmill stress echocardiography

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Marc-André d’Entremont ◽  
Gabriel Fortin ◽  
Thao Huynh ◽  
Étienne Croteau ◽  
Paul Farand ◽  
...  
Keyword(s):  
Coronary Stenosis ◽  
Speckle Tracking ◽  
Stress Echocardiography ◽  
Area Under The Curve ◽  
Visual Assessment ◽  
Exercise Stress ◽  
Two Dimensional ◽  
Incremental Value ◽  
Bull's Eye ◽  
Significant Coronary Stenosis

Abstract Background Two-dimensional speckle-tracking echocardiography (STE) may help detect coronary artery disease (CAD) when combined with dobutamine stress echocardiography. However, few studies have explored STE with exercise stress echocardiography (ESE). We aimed to evaluate the feasibility, reliability, and incremental value of STE combined with treadmill ESE compared to treadmill ESE alone to detect CAD. Methods We conducted a case–control study of all consecutive patients with abnormal ESE in 2018–2020 who subsequently underwent coronary angiography within a six-month interval. We 1:1 propensity score-matched these patients to those with a normal ESE. Two blinded operators generated a 17-segment bull's-eye map of longitudinal strain (LS). We utilized the mean differences between stress and baseline LS values in segments 13–17, segment 17, and segments 15–16 to create receiver operator curves for the overall examination, the left anterior descending artery (LAD), and the non-LAD territories, respectively. Results We excluded 61 STEs from 201 (30.3%) eligible ESEs; 47 (23.4%) because of suboptimal image quality and 14 (7.0%) because of excessive heart rate variability precluding the calculation of a bull's-eye map. After matching, a total of 102 patients were included (51 patients in each group). In the group with abnormal ESE patients (mean age 66.4 years, 39.2% female), 64.7% had significant CAD (> 70% stenosis) at coronary angiogram. In the group with normal ESE patients (mean age 65.1 years, 35.3% female), 3.9% were diagnosed with a new significant coronary stenosis within one year. The intra-class correlation for global LS was 0.87 at rest and 0.92 at stress, and 0.84 at rest, and 0.89 at stress for the apical segments. The diagnostic accuracy of combining ESE and STE was superior to visual assessment alone for the overall examination (area under the curve (AUC) = 0.89 vs. 0.84, p = 0.025), the non-LAD territory (AUC = 0.83 vs. 0.70, p = 0.006), but not the LAD territory (AUC = 0.79 vs. 0.73, p = 0.11). Conclusions Two-dimensional speckle-tracking combined with treadmill ESE is relatively feasible, reliable, and may provide incremental diagnostic value for the detection and localization of significant CAD.

434 LOOK OUT! VISUAL ASSESSMENT TOOL: UTILITY IN OLDER PERSON’S MENTAL HEALTH CARE SETTINGS

2021 ◽  
Vol 50 (Supplement_2) ◽  
pp. ii1-ii4
Author(s):  
S Hussain ◽  
C Thavachelvi ◽  
E Ruiz-Mendoza
Keyword(s):  
Mental Health ◽  
Health Care ◽  
Mental Health Care ◽  
Old Age ◽  
Assessment Tool ◽  
Visual Assessment ◽  
Mental Health Settings ◽  
Risk Of Falls ◽  
Old Age Psychiatry ◽  
The Look

Abstract Introduction Patients on old age psychiatry wards are at high risk of falls. It has been shown that poor visual acuity significantly increases the risk of recurrent falls in the elderly. The National Audit of Inpatient Falls (NAIF) Report 2015 found that vision was poorly assessed. The Look Out! Visual assessment has been developed for patients over 65 to receive visual screening on admission to reduce the risk of falls. To date, there has been no research into the applicability of the Look Out! test in mental health settings. Our aims are two-fold: (i) To investigate how often vision is assessed for inpatients on old age psychiatry wards and (ii) To identify the challenges of visual assessment in a mental health care setting. Methodology Data was collected at a mental health unit with two wards dedicated to old age psychiatry patients. Data was collected for patients admitted from May 2020 to July 2020 and analysing qualitative and quantitative data. Results From the 30 patients reviewed, 27% of patients had ophthalmic history, such as glaucoma or cataracts, 23% of patients had a fall during admission, yet only 43% of patients had a Look Out! vision assessment completed and documented. 54% of patients who had a Look Out! Assessment were found to have an abnormality; of those with an abnormality detected on Look Out!, 57% were new presentations of an eye abnormality. On questionnaires, we found it more challenging to complete assessments of patients that were agitated or with advanced dementia but assessments were fully completed if more time was dedicated. Conclusions These findings demonstrate that the Look Out! test is applicable in mental health settings, helping to identify those with visual impairments and raising the need to complete the screening tool in all patients admitted to inpatient mental health facilities.

scholarly journals Two-Dimensional DOA Estimation of MIMO Radar Coherent Source Based on Toeplitz Matrix Set Reconstruction

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Fei Zhang ◽  
Aisuo Jin ◽  
Yin Hu
Keyword(s):  
Toeplitz Matrix ◽  
Full Rank ◽  
Complete Information ◽  
Doa Estimation ◽  
Mimo Radar ◽  
Estimation Accuracy ◽  
Two Dimensional ◽  
Dimensional Reconstruction ◽  
Esprit Algorithm ◽  
Coherent Source

In order to realize the high-precision direction of arrival (DOA) estimation of the coherent source of two-dimensional multiple-input and multiple-output (MIMO) radar, a solution is given by combining Toeplitz matrix set reconstruction. MIMO radar obtains a larger aperture with fewer arrays. Traditional two-dimensional reconstruction Toeplitz-like algorithms use part of the information in the construction of two correlation matrices or covariance matrices to construct the Toeplitz matrix when performing two-dimensional coherent source DOA estimation, which makes the information utilization incomplete and requires additional denoising processing. To solve the above problems, this paper proposes an improved Toeplitz matrix set reconstruction algorithm based on the two-dimensional reconstruction Toeplitz class algorithm. The complete array element receiving signal vector is used to construct two Toeplitz matrix sets containing complete information, and then their conjugate transposes. Multiply and sum to correct the matrix to obtain a full-rank matrix, so as to achieve the purpose of decoherence and combine the traditional ESPRIT algorithm to perform two one-dimensional reconstruction processing through rotation invariance and then perform angle matching to achieve two-dimensional coherent signal angle estimation, while avoiding additional denoising processing. Finally, the simulation results of the cross array and the L-shaped array verify the effectiveness of the algorithm in this paper and further extend it to the two-dimensional MIMO radar array model and compare it with the traditional ESPRIT-like algorithm and the REC-FBSS-ESPRIT algorithm. In comparison, the algorithm in this paper has better performance under the conditions of successful resolution, DOA estimation accuracy, and low signal-to-noise ratio.

scholarly journals A new tomography method in the presence of an opaque object

2017 ◽  
pp. 129-137
Author(s):  
А.В. Лихачев
Keyword(s):  
Numerical Results ◽  
Two Dimensional ◽  
Algebraic Equations ◽  
Homogeneous Polynomials ◽  
Linear Algebraic Equations ◽  
Alternative Approaches ◽  
Tomography Method ◽  
Opaque Object ◽  
Dimensional Object

Разработан новый метод реконструкции изображения сечения объекта, содержащего непрозрачное включение. Для того чтобы оценить неизвестные данные в области тени, решается система линейных алгебраических уравнений, построенная на основе представления моментов проекций однородными полиномами. По результатам проведенного вычислительного эксперимента оказалось, что метод имеет преимущества перед альтернативными подходами. A new tomography method for a two-dimensional object containing an opaque inclusion is developed. For the estimation of unknown data in the opaque object's shadow, the system of linear algebraic equations derived from the representation of projections of moments by homogeneous polynomials is solved. The numerical results show that the method has a number of advantages over alternative approaches.

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