Roque Torres

Roque Torres
Universidad Politécnica de Cartagena | UPCT · Automática Ingeniería Eléctrica y Tecnología Electrónica

PhD

About

88
Publications
22,135
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1,235
Citations
Introduction
Additional affiliations
January 1999 - present
Universidad Politécnica de Cartagena
Position
  • Professor (Associate)
October 1990 - April 2019
Universidad Politécnica de Cartagena
Position
  • Professor (Associate)

Publications

Publications (88)
Article
Full-text available
Water is a limited resource in arid and semi-arid regions, as is the case in the Mediterranean Basin, where demographic and climatic conditions make it ideal for growing fruits and vegetables, but a greater volume of water is required. Deficit irrigation strategies have proven to be successful in optimizing available water without pernicious impact...
Conference Paper
Full-text available
Soil moisture is of major relevance in agricultural and environmental monitoring, having a direct impact in crop growth and yield, and playing an important role in soil conservation and landscape management. Several well-known techniques are widely used to determine soil moisture, but dielectric methods are notable for their automation potential an...
Article
Full-text available
The performance of a handheld Vector Network Analyzer (VNA), the nanoVNA, a low-cost, open-source instrument, was evaluated. The instrument measures the complex permittivity of dielectric media from 1-port reflection parameters in the 1 – 900 MHz bandwidth. We manufactured an open-ended coaxial probe using a SMA-N coaxial adapter to perform dielect...
Article
Full-text available
The present work evaluates the main adaptive mechanisms developed by young sweet cherry trees (Prunus avium L.) to cope with drought. For this purpose, the young trees were subjected to two drought cycles with different water stress intensities followed by a recovery period. Three irrigation treatments were applied: control treatment (CTL) irrigate...
Article
Full-text available
Crop canopy temperature measurement is necessary for monitoring water stress indicators such as the Crop Water Stress Index (CWSI). Water stress indicators are very useful for irrigation strategies management in the precision agriculture context. For this purpose, one of the techniques used is thermography, which allows remote temperature measureme...
Conference Paper
Full-text available
Sensor platforms are used as sources of information for certain specific environments. In the field of maritime and oceanographic systems, these platforms make it possible to sensorize certain properties of the water based on various variables, such as the oxygen level, the levels of turbidity, chlorophyll, salinity, etc. Due to the different strat...
Chapter
La necesidad de analizar la pérdida de calidad en los alimentos se ha ido incrementando en los últimos tiempos de manera progresiva, debido a las cada vez más restrictivas condiciones de trazabilidad en las diferentes fases de distribución de los productos perecederos. Disponer de herramientas que permitan estimar las pérdidas de calidad en estas f...
Chapter
Full-text available
El agua es un bien escaso, especialmente en las regiones áridas y semiáridas. Este es el caso de la Cuenca Mediterránea, donde sus condiciones demográficas y climáticas la hacen idónea para el cultivo de frutas y hortalizas, demandando un volumen mayor de recursos hídricos. Las estrategias de riego deficitario se han mostrado exitosas, pero resulta...
Article
Full-text available
Monitoring the main environmental conditions during storage and transportation of perishable foods is necessary to predict quality losses throughout shelf life. By far, temperature is the main factor affecting quality and shelf life, but there are other variables that would greatly affect quality losses such us relative humidity, O2, CO2, ethylene,...
Article
Full-text available
Researchers, farmers and viticulturists have focused on the development and adoption of alternative management strategies that are more environmentally and economically sustainable. One strategy could be cover crops, which are often sowed as a mix of non-leguminous and leguminous species, with positive effects on nitrogen nutrition of the vines . I...
Article
Full-text available
The application of deficit irrigation techniques is essential in arid or semi-arid areas of the southeast of Spain, where water is a scarce and very costly resource. However, to apply these techniques, it is necessary to carry out preliminary tests on the specific crop in order to develop the models that allow the optimization of water use while ac...
Article
Full-text available
The number of sensors, ground-based and remote, exploiting the relationship between soil dielectric response and soil water content continues to grow. Empirical expressions for this relationship generally work well in coarse-textured soils but can break down for high-surface area and intricate materials such as clayey soils. Dielectric mixing model...
Article
Full-text available
Infrared thermography has been introduced as an affordable tool for plant water status monitoring, especially in regions where water availability is the main limiting factor in agricultural production. This paper outlines the potential applications of low-cost thermal imaging devices to evaluate the water status of young and mature sweet cherry tre...
Article
Full-text available
The present work aims to assess the usefulness of five vegetation indices (VI) derived from multispectral UAS imagery to capture the effects of deficit irrigation on the canopy structure of sweet cherry trees (Prunus avium L.) in southeastern Spain. Three irrigation treatments were assayed, a control treatment and two regulated deficit irrigation t...
Article
The effect of a UV–C postharvest treatment (4 kJ m–2) on physicochemical quality, phenolic contents and total antioxidant capacity of ‘Prime Giant’ sweet cherry throughout 20 d at 2 °C (simulated cold storage during transportation period) plus 5 d at 15 °C (additional shelf life period) was studied. Furthermore, the effect of two regulated deficit...
Article
Full-text available
The control of the main environmental factors that influence the quality of perishable products is one of the main challenges of the food industry. Temperature is the main factor affecting quality, but other factors like relative humidity and gas concentrations (mainly C2H4, O2 and CO2) also play an important role in maintaining the postharvest qua...
Conference Paper
Full-text available
La optimización del riego es crucial en agricultura. Una de las técnicas empleadas habitualmente en las regiones áridas es el riego deficitario, que requiere la medición de los parámetros de estrés de los cultivos. El Índice de Estrés Hídrico del Cultivo (CWSI) es uno de estos parámetros y se obtiene a partir de la temperatura del dosel vegetal. Si...
Article
Full-text available
Automatic irrigation scheduling systems are highly demanded in the agricultural sector due to their ability to both save water and manage deficit irrigation strategies. Elaborating a functional and efficient automatic irrigation system is a very complex task due to the high number of factors that the technician considers when managing irrigation in...
Article
Full-text available
The reproductive response of fifteen year old sweet cherry trees (Prunus avium L.) combination ‘Prime Giant’/SL64 under Mediterranean climate to deficit irrigation was studied in a commercial orchard in south-eastern Spain for four seasons. Three irrigation treatments were assayed: (i) control treatment, irrigated without restrictions at 110% of se...
Article
Full-text available
The crop water stress index (CWSI) is one of the parameters measured in deficit irrigation and it is obtained from crop canopy temperature. However, image segmentation is required for non-leaf region exclusion in temperature measurement, as it is critical to obtain the temperature values for the calculation of the CWSI. To this end, two image-segme...
Poster
Full-text available
Numerous dielectric soil moisture sensors are now commercially available and new designs are continuously released. However, the dependence of the permittivity-water content relationship on soil and porous media properties, remains poorly understood with regard to the frequency domain response. Since Topp et al.’s seminal paper1, several studies ha...
Article
Full-text available
The agronomic response of sweet cherry (Prunus avium L.) ‘Prime Giant’ to a 4 year-long experiment involving deficit irrigation strategies in a Mediterranean climate was studied in a commercial orchard located in the southeast of Spain (Jumilla, Spain). Four drip irrigation treatments were imposed: (i) control treatment (CTL), irrigated without res...
Article
Keywords: Fruit water potential Pedicel Postharvest fruit quality Stem water potential Water stress A B S T R A C T The performance of 'Prime Giant' sweet cherry trees under three different irrigation regimes was examined during two consecutive seasons, 2015-2016 and 2016-2017. The irrigation treatments evaluated were: (i) a control treatment (CTL)...
Article
Full-text available
Water is the main limiting factor in agricultural production as well as a scarce resource that needs to be optimized. The measurement of soil water with sensors is an efficient way for optimal irrigation management. However, commercial sensors are still too expensive for most farmers. This paper presents the design, development and calibration of a...
Article
Full-text available
This paper focuses on detecting freezing of gait in Parkinson’s patients using body-worn accelerometers. In this study, we analyzed the robustness of four feature sets, two of which are new features adapted from speech processing: mel frequency cepstral coefficients and quality assessment metrics. For classification based on these features, we comp...
Article
A two-year experiment with sweet cherry (P. avium L. cv Prime Giant) trees was carried out to ascertain which of the following commonly used soil and plant water indicators is most effective for deficit irrigation scheduling: Ψstem (midday stem water potential), MDS (maximum daily branch shrinkage), gs (stomatal conductance), θv (soil volumetric wa...
Conference Paper
Water is the main limiting factor in agricultural production as well as a scarce resource that needs to be optimized. The measurement of soil water with sensors is an efficient way for optimal irrigation management. However, several sensors are necessary to ensure reliable measurements in a medium with as much dispersion as the ground. The design o...
Patent
Dispositivo, sistema y método de monitorización en tiempo real de las variables físicas y ambientales durante el transporte de mercancías perecederas.
Conference Paper
Full-text available
La creciente aplicación de la tecnología al control de los cultivos ha llevado al desarrollo de múltiples sistemas de medida del contenido de agua del suelo, permitiendo, de este modo, un uso eficiente de un bien tan escaso como es el agua. Sin embargo, el coste de estos equipos es elevado, lo que dificulta su uso masivo en el sector. Por este moti...
Conference Paper
Full-text available
La determinación de la evapotranspiración del cultivo (ETc) es un tema de gran importancia en la gestión del regadío. Numerosos autores han propuesto coeficientes y técnicas para la obtención de la ETc. Desde el punto de vista práctico, la ETc es directamente medible con técnicas de lisimetría, pero dada la gran complejidad y la poca escalabilidad...
Article
Full-text available
It is well-known that information and communication technologies enable many tasks in the context of precision agriculture. In fact, more and more farmers and food and agriculture companies are using precision agriculture-based systems to enhance not only their products themselves, but also their means of production. Consequently, problems arising...
Article
The Coastal Ocean Observation System of Murcia Region (OOCMUR) was established in 2008 as a major scientific and technological infrastructure in Spain with the main objective of studying the impact of global climate change in the Mediterranean. The coastal lagoon of Mar Menor in southeast Spain was chosen as the first region to be monitored because...
Article
The use of mulches in vineyards and orchards is a traditional agricultural practice used with the aim of saving moisture, reducing weed growth and improving organic matter content in the soil. In table grape vineyards trained to overhead system in Puglia region (Southeastern Italy), plastic sheets covering the canopy are often used to either advanc...
Article
Using suitable information storage, management and processing resources is essential when Precision Agriculture-based applications are developed. Nowadays, traditional client-server paradigm is useful but it might not be enough for this purpose. The amount of data that could be stored and processed, and the need of generating complex knowledge and...
Article
A two-year experiment was conducted to investigate the suitability of reference lines for irrigation scheduling based on maximum daily trunk shrinkage (MDS) and midday stem water potential (Ψs) in a commercial orchard of table grape cv. Crimson Seedless grafted onto Paulsen 1103 (V. berlandieri R. × V. rupestres du Lot). Vines were irrigated (from...
Conference Paper
Full-text available
Coastal buoys equipped with sensors, are very suitable for monitoring and controlling the status of water, since the installation and maintenance can be performed in a simple way and at limited cost, and the technology used allows the deployment of wireless networks of buoys. These wireless buoys make it possible to monitor the measured parameters...
Conference Paper
Full-text available
Using a buoy-based coastal monitoring systems we can build innovative solutions to address, among other activities, monitor the marine coastal conditions. This technology is evolving continuously but due to the high costs of the buoy based installations, it is really hard to show the potential added-value applications in the market. A Smart System...
Article
Full-text available
Precision agriculture is a well-known approach that allows to estimate, evaluate and understand crop evolution. This paper describes how such approach is implemented by deploying a wireless sensor network, whose main components are based on the new multifunctional wireless sensor node GAIA2, a fully configurable device (from a hardware and software...
Conference Paper
Full-text available
In the Mediterranean area water is the main factor limiting crop production and therefore irrigation is essential to achieve economically viable yields. One of the fundamental techniques to ensure that irrigation water is managed efficiently with maximum productivity and minimum environmental impact is irrigation scheduling. The fact that the plant...
Patent
Full-text available
Sistema y método para la orientación de una placa solar fotovoltaica instalada en una boya marina. La presente invención se refiere a un sistema y a un método de orientación hacia el sol de una placa solar instalada en una boya marina, donde dicho sistema comprende una estructura acoplable al mástil de dicha boya que comprende, asimismo, al menos u...
Article
This study assesses the usefulness of the remote scheduling of regulated deficit irrigation (RDI) in almond based on the maximum daily trunk shrinkage signal intensity (SIMDS). The 2-year experiment was carried out in SE Spain on 12-year-old almond trees (Prunus dulcis (Mill.) D.A. Webb cv. Guara). Four irrigation treatments were established to eva...
Article
A three-year experiment on early nectarine (Prunus persica L. Batsch cv. Flanoba) trees was carried out with the aim of studying the impact of environmental variables on the trunk diameter fluctuation parameters and the usefulness of the reference-lines derived from the relationship between different meteorological variables and plant water status...
Conference Paper
Full-text available
El agua es un recurso escaso y muy necesario para la óptima producción agrícola. En el sureste español, este recurso, además de escaso, es muy caro, con lo que la aplicación de tratamientos de riego que aporten mejoras en cuanto a consumo de agua, repercuten de un modo notable en la productividad del cultivo. Para lograr estas mejoras, es necesario...
Conference Paper
Full-text available
En el presente trabajo se propone el diseño de una red de sensores inalámbrica (Wireless Sensor Network, en adelante WSN) capaz de detectar y realizar un seguimiento de emisiones de sustancias nocivas (gases) en el medio ambiente en las proximidades de áreas altamente industrializadas. El objeto de esta red es conseguir una detección temprana del p...
Article
Full-text available
Monitoring of marine ecosystems is essential to identify the parameters that determine their condition. The data derived from the sensors used to monitor them are a fundamental source for the development of mathematical models with which to predict the behaviour of conditions of the water, the sea bed and the living creatures inhabiting it. This pa...