Megafauna community assessment of polymetallic nodule fields with cameras: Platform and methodology comparison

Abstract. With the mining of polymetallic nodules from the deep sea seafloor again approaching commercial viability, decisions must be taken on how to most efficiently regulate and monitor physical and community disturbance in these remote ecosystems. Image based approaches allow non-destructive assessment of larger fauna abundances to be derived from survey data, with repeat surveys of areas possible to allow time series data collection. At time of writing key underwater imaging platforms commonly used to map seafloor fauna abundances are Automated Underwater Vehicles (AUVs), Remotely Operated Vehicles (ROVs) and towed camera Ocean Floor Observation Systems (OFOSs). These systems are highly customisable, with mounted cameras, illumination systems and deployment protocols rapidly changing over time, and even within survey cruises. In this study 8 image datasets were collected from a discrete area of polymetallic nodule rich seafloor by an AUV and several OFOSs deployed at various altitudes above the seafloor. A fauna identification catalogue was used by 5 annotators to estimate the abundances of 20 fauna categories from the different data sets. Results show that for many categories of megafauna differences in image resolution greatly influenced the estimations of fauna abundance determined by the annotators. This is an important finding for the development of future monitoring legislation for these areas. When and if commercial exploitation of these marine resources commences, to ensure best monitoring practice, unambiguous rules on how camera-based monitoring surveys should be conducted, and with what equipment, must be put in place.

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Megafauna community assessment of polymetallic-nodule fields with cameras: platform and methodology comparison

Biogeosciences ◽

10.5194/bg-17-3115-2020 ◽

2020 ◽

Vol 17 (12) ◽

pp. 3115-3133 ◽

Cited By ~ 1

Author(s):

Timm Schoening ◽

Autun Purser ◽

Daniel Langenkämper ◽

Inken Suck ◽

James Taylor ◽

...

Keyword(s):

Time Series Data ◽

Autonomous Underwater Vehicles ◽

Image Resolution ◽

Series Data ◽

Underwater Imaging ◽

Polymetallic Nodule ◽

Technological Advances ◽

Polymetallic Nodules ◽

Observation Systems ◽

Discrete Area

Abstract. With the mining of polymetallic nodules from the deep-sea seafloor once more evoking commercial interest, decisions must be taken on how to most efficiently regulate and monitor physical and community disturbance in these remote ecosystems. Image-based approaches allow non-destructive assessment of the abundance of larger fauna to be derived from survey data, with repeat surveys of areas possible to allow time series data collection. At the time of writing, key underwater imaging platforms commonly used to map seafloor fauna abundances are autonomous underwater vehicles (AUVs), remotely operated vehicles (ROVs) and towed camera “ocean floor observation systems” (OFOSs). These systems are highly customisable, with cameras, illumination sources and deployment protocols changing rapidly, even during a survey cruise. In this study, eight image datasets were collected from a discrete area of polymetallic-nodule-rich seafloor by an AUV and several OFOSs deployed at various altitudes above the seafloor. A fauna identification catalogue was used by five annotators to estimate the abundances of 20 fauna categories from the different datasets. Results show that, for many categories of megafauna, differences in image resolution greatly influenced the estimations of fauna abundance determined by the annotators. This is an important finding for the development of future monitoring legislation for these areas. When and if commercial exploitation of these marine resources commences, robust and verifiable standards which incorporate developing technological advances in camera-based monitoring surveys should be key to developing appropriate management regulations for these regions.

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Cell cycle time series gene expression data encoded as cyclic attractors in Hopfield systems

10.1101/170027 ◽

2017 ◽

Author(s):

Anthony Szedlak ◽

Spencer Sims ◽

Nicholas Smith ◽

Giovanni Paternostro ◽

Carlo Piermarocchi

Keyword(s):

Neural Network ◽

Gene Expression ◽

Cell Cycle ◽

Time Series ◽

Time Series Data ◽

Series Data ◽

Data Sets ◽

Expression Data ◽

Time Series Gene Expression ◽

Human Cervical Cancer

AbstractModern time series gene expression and other omics data sets have enabled unprecedented resolution of the dynamics of cellular processes such as cell cycle and response to pharmaceutical compounds. In anticipation of the proliferation of time series data sets in the near future, we use the Hopfield model, a recurrent neural network based on spin glasses, to model the dynamics of cell cycle in HeLa (human cervical cancer) and S. cerevisiae cells. We study some of the rich dynamical properties of these cyclic Hopfield systems, including the ability of populations of simulated cells to recreate experimental expression data and the effects of noise on the dynamics. Next, we use a genetic algorithm to identify sets of genes which, when selectively inhibited by local external fields representing gene silencing compounds such as kinase inhibitors, disrupt the encoded cell cycle. We find, for example, that inhibiting the set of four kinases BRD4, MAPK1, NEK7, and YES1 in HeLa cells causes simulated cells to accumulate in the M phase. Finally, we suggest possible improvements and extensions to our model.Author SummaryCell cycle – the process in which a parent cell replicates its DNA and divides into two daughter cells – is an upregulated process in many forms of cancer. Identifying gene inhibition targets to regulate cell cycle is important to the development of effective therapies. Although modern high throughput techniques offer unprecedented resolution of the molecular details of biological processes like cell cycle, analyzing the vast quantities of the resulting experimental data and extracting actionable information remains a formidable task. Here, we create a dynamical model of the process of cell cycle using the Hopfield model (a type of recurrent neural network) and gene expression data from human cervical cancer cells and yeast cells. We find that the model recreates the oscillations observed in experimental data. Tuning the level of noise (representing the inherent randomness in gene expression and regulation) to the “edge of chaos” is crucial for the proper behavior of the system. We then use this model to identify potential gene targets for disrupting the process of cell cycle. This method could be applied to other time series data sets and used to predict the effects of untested targeted perturbations.

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An Efficient Method for Forecasting Using Fuzzy Time Series

Emerging Research on Applied Fuzzy Sets and Intuitionistic Fuzzy Matrices - Advances in Computational Intelligence and Robotics ◽

10.4018/978-1-5225-0914-1.ch013 ◽

2017 ◽

pp. 287-304 ◽

Cited By ~ 3

Author(s):

Pritpal Singh

Keyword(s):

Time Series ◽

Time Series Data ◽

Weather Forecasting ◽

Small Error ◽

Fuzzy Time Series ◽

Series Data ◽

Data Sets ◽

Proposed Model ◽

Temperature Forecasting ◽

The University

Forecasting using fuzzy time series has been applied in several areas including forecasting university enrollments, sales, road accidents, financial forecasting, weather forecasting, etc. Recently, many researchers have paid attention to apply fuzzy time series in time series forecasting problems. In this paper, we present a new model to forecast the enrollments in the University of Alabama and the daily average temperature in Taipei, based on one-factor fuzzy time series. In this model, a new frequency based clustering technique is employed for partitioning the time series data sets into different intervals. For defuzzification function, two new principles are also incorporated in this model. In case of enrollments as well daily temperature forecasting, proposed model exhibits very small error rate.

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Growth Limits: A Conceptual Analysis for Sustainable Development in Nigeria

SAGE Open ◽

10.1177/2158244020918277 ◽

2020 ◽

Vol 10 (2) ◽

pp. 215824402091827

Author(s):

Oluwabunmi O. Adejumo

Keyword(s):

Time Series Data ◽

Optimal Growth ◽

Series Data ◽

Data Sets ◽

African Countries ◽

Limits To Growth ◽

Development Indicators ◽

Long Run ◽

Sub Saharan

In the school of development thought, growth has been identified as a viable alternative to the challenge of poverty and economic backwardness. However, the ecologists have continuously challenged the growth position in relation to environmental degradation and depletion. It is against this background; this study examined the limits to growth in Nigeria beyond which there will be inimical consequences for the environment. The study employed time series data that spanned between 1970 and 2014. These data sets were sourced from the World Development Indicators. Based on the assimilation model, threshold estimates were used to identify optimal growth regions, whereas regression estimates were used to measure growth effects. It was discovered that below the identified growth limit, there are currently significant negative impacts on the quality of the environment in Nigeria via economic growth. This study is a single-country case, that is, Nigeria; hence, the study can be expanded to include other sub-Saharan African countries. The study adds to knowledge by establishing the prospects for sustainability in the quality of the environment in the long run; therefore, policies designed in this areas have higher likelihood of attaining sustainability.

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AstroCatR: a mechanism and tool for efficient time series reconstruction of large-scale astronomical catalogues

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/staa1413 ◽

2020 ◽

Vol 496 (1) ◽

pp. 629-637

Author(s):

Ce Yu ◽

Kun Li ◽

Shanjiang Tang ◽

Chao Sun ◽

Bin Ma ◽

...

Keyword(s):

Time Series ◽

High Performance ◽

Large Scale ◽

Extrasolar Planets ◽

Time Series Data ◽

Series Data ◽

Data Sets ◽

Observation Data ◽

Data Volume ◽

And Performance

ABSTRACT Time series data of celestial objects are commonly used to study valuable and unexpected objects such as extrasolar planets and supernova in time domain astronomy. Due to the rapid growth of data volume, traditional manual methods are becoming extremely hard and infeasible for continuously analysing accumulated observation data. To meet such demands, we designed and implemented a special tool named AstroCatR that can efficiently and flexibly reconstruct time series data from large-scale astronomical catalogues. AstroCatR can load original catalogue data from Flexible Image Transport System (FITS) files or data bases, match each item to determine which object it belongs to, and finally produce time series data sets. To support the high-performance parallel processing of large-scale data sets, AstroCatR uses the extract-transform-load (ETL) pre-processing module to create sky zone files and balance the workload. The matching module uses the overlapped indexing method and an in-memory reference table to improve accuracy and performance. The output of AstroCatR can be stored in CSV files or be transformed other into formats as needed. Simultaneously, the module-based software architecture ensures the flexibility and scalability of AstroCatR. We evaluated AstroCatR with actual observation data from The three Antarctic Survey Telescopes (AST3). The experiments demonstrate that AstroCatR can efficiently and flexibly reconstruct all time series data by setting relevant parameters and configuration files. Furthermore, the tool is approximately 3× faster than methods using relational data base management systems at matching massive catalogues.

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Comparison of Co-temporal Modeling Algorithms on Sparse Experimental Time Series Data Sets

2010 IEEE International Conference on BioInformatics and BioEngineering ◽

10.1109/bibe.2010.21 ◽

2010 ◽

Author(s):

Edward E. Allen ◽

James L. Norris ◽

David J. John ◽

Stan J. Thomas ◽

William H. Turkett Jr. ◽

...

Keyword(s):

Time Series ◽

Time Series Data ◽

Series Data ◽

Data Sets ◽

Temporal Modeling ◽

Experimental Time ◽

Experimental Time Series

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Distributed and Scalable Platform for Collaborative Analysis of Massive Time Series Data Sets

Proceedings of the 8th International Conference on Data Science, Technology and Applications ◽

10.5220/0007834700410052 ◽

2019 ◽

Author(s):

Eduardo Duarte ◽

Diogo Gomes ◽

David Campos ◽

Rui Aguiar

Keyword(s):

Time Series ◽

Time Series Data ◽

Series Data ◽

Data Sets ◽

Collaborative Analysis

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FRACTAL ANALYSIS OF DIFFERENT EASTERN AND WESTERN MUSICAL INSTRUMENTS

Fractals ◽

10.1142/s0218348x06003192 ◽

2006 ◽

Vol 14 (03) ◽

pp. 165-170 ◽

Cited By ~ 7

Author(s):

ATIN DAS ◽

PRITHA DAS

Keyword(s):

Time Series ◽

Spectral Analysis ◽

Fractal Dimension ◽

Time Series Data ◽

Musical Instruments ◽

Series Data ◽

Data Sets ◽

Different Types ◽

Frequency Regime ◽

Musical Sounds

In this paper, we attempt musical analysis by measuring fractal dimension (D) of musical pieces played by several musical instruments. We collected solo performances of popular instruments of Western and Eastern origin as samples. We attempted usual spectral analysis of the selected clips to observe peaks of fundamental and harmonics in frequency regime. After appropriate processing, we converted them into time series data sets and computed their fractal dimension. Based on our results, we conclude that instrumental musical sounds may have higher Ds than those computed from vocal performances of different types of Indian songs.

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