Papers by Maria Luisa Vannuccini
Ecological Indicators, 2020
Science of The Total Environment, 2019
Micro-( 5 mm) and nanoplastics ( 1 μm) are emerging threats for marine ecosystems worldwide. Br... more Micro-( 5 mm) and nanoplastics ( 1 μm) are emerging threats for marine ecosystems worldwide. Brine shrimp Artemia is recognized as a suitable model among planktonic species for studying the impact of polystyrene nanoparticles (PS NPs) through short and long-term bioassays. Our study aims to evaluate the timedependent effects of cationic amino-modified PS-NH 2 (50 nm) in A. franciscana after short-(48 h) and long-term exposure (14 days). For this purpose, nauplii were exposed to a concentration range of PS-NH 2 (0.1, 1, 3 and 10 µg/mL) in natural sea water (NSW), and physiological, biochemical and molecular responses were investigated. Short-term exposure to PS-NH 2 caused a decrease in nauplii growth and affected the development in a concentration-dependent manner, long-term exposure impaired the survival, but not the growth and feeding behavior. Oxidative stress was detected after short term exposure as the decrease in the activity of antioxidant enzymes, and was fully evident in the long-term as lipid peroxidation, suggesting an accumulative effect. The decrease in Cholinesterase (ChE) activity observed indicates possible neurotoxic action of PS-NH 2. Also, Carboxylesterase (CbE) inhibition by PS-NH 2, described for the first time in this study, anticipates potential effects in biotransformation of exogenous and endogenous compounds, being the crustacean juvenile hormone methyl farnesoate (MF) that regulates development and molting, one candidate. Furthermore, short-and long-term exposure to PS-NH 2 affect the expression of genes involved in cell protection, development and molting. Overall, our results reveal that low PS-NH 2 concentrations induce physiological, biochemical and molecular (changes in gene expression) alterations in Artemia, and point at their potential risk for this model organism, supporting the general concern about nanoplastics occurrences in aquatic environments and their ability to represent an ecological threat for aquatic zooplanktonic species.
Общество с ограниченной ответственностью «Эко-Вектор», 2017
시장 수요 예측은 일정 기간 동안 소비자에게 판매되는 동종 제품 또는 서비스의 수량 혹은 매출액의 규모를 추정하는 활동으로서, 기업경영활동에 있어 효율적인 의사결정을 내릴 수... more 시장 수요 예측은 일정 기간 동안 소비자에게 판매되는 동종 제품 또는 서비스의 수량 혹은 매출액의 규모를 추정하는 활동으로서, 기업경영활동에 있어 효율적인 의사결정을 내릴 수 있는 근거로 활용된다는 점에서 중요하게 인식되고 있다. 신규 시장의 수요를 예측하기 위해 다양한 시장성장모형이 개발되어 왔다. 이런 모형들은 일반적으로 시장의 크기 변화의 동인을 신기술 확산으로 보고 소비자인 개인에게 기술이 확산되는 과정을 통해 시장 크기가 변하는 과정을 확산모형으로 구현하게 된다. 그러나, 시장이 형성된 직후에는 수요 관측치의 부족으로 인해 혁신계수, 모방계수와 같은 예측모형의 모수를 정확하게 추정하는 것이 쉽지 않다. 이런 경우, 전문가의 판단 하에 예측하고자 하는 시장과 유사한 시장을 결정하고 이를 참고하여 모수를 추정하게 되는데, 어떤 시장을 유사하다고 판단하느냐에 따라 성장모형은 크게 달라지게 되므로, 정확한 예측을 위해서는 유사 시장을 찾는 것은 매우 중요하다. 그러나, 이런 방식은 직관과 경험이라는 정성적 판단에 크게 의존함으로써 일관성이 떨어질 수밖에 없으며, 결국, 만족할 만한 수준의 결과를 얻기 힘들다는 단점을 지닌다. 이런 정성적 방법은 유사도가 더 높은 시장을 누락시키고 유사도가 낮은 시장을 선택하는 오류를 일으킬 수 있다. 이런 이유로, 본 연구는 신규 시장의 모수를 추정하기 위해 필요한 유사시장을 누락 없이 효과적으로 찾아낼 수 있는 사례기반 전문가 시스템을 설계하고자 수행되었다. 제안된 모형은 데이터 마이닝의 군집분석 기법과 추천 시스템의 내용 기반 필터링 방법론을 기반으로 전문가 시스템으로 구현되었다. 본 연구에서 개발된 시스템의 유용성을 확인하고자 정보통신분야 시장의 모수를 추정하는 실험을 실시하였다. 전문가를 대상으로 실시된 실험에서, 시스템을 사용한 모수의 추정치가 시스템을 사용하지 않았을 때와 비교하여 실제 모수와 더 가까움을 보임으로써 시스템의 유용성을 증명하였다.
Bei der Frage nach dem Ausmas der Erkundungsobliegenheit des Geschadigten zu den Voraussetzungen ... more Bei der Frage nach dem Ausmas der Erkundungsobliegenheit des Geschadigten zu den Voraussetzungen einer erfolgreichen Anspruchsverfolgung kommt es immer auf die Umstande des Einzelfalls an, die Anforderungen durfen jedenfalls nicht uberspannt werden. Bestimmen sich die Eigenschaften des Werks nach der Verkehrsauffassung, sind die anerkannten Regeln der Technik des jeweiligen Fachs zu beachten.
Synopsis of the research proposal Evaluation of telephonic consultation between rural and urban b... more Synopsis of the research proposal Evaluation of telephonic consultation between rural and urban based doctors following two week anesthetics training in Port Elizabeth Type of study : observational survey through questionnaire and demographic information from the Database Design : retrospective study using both qualitative and quantitative methods Aims/objectives of the study :To determine user perception of the quality of service of the telephonic support system for rural doctors in Port Elizabeth Hypothesis : a telephonic support system following a short anaesthetic training course for rural doctors in Port Elizabeth is of value to the doctors Background of the project : In PE there is a rural obstetric anesthesia “in reach” program in which two doctors from surrounding rural areas come for training in obstetric anesthesia in the context of rural practice. In the two weeks of the course, they also have resuscitation training . The program has been running since 2009. It a...
Whereas a "customer preference" will not justify a job qualification based on sex, an invasion of... more Whereas a "customer preference" will not justify a job qualification based on sex, an invasion of privacy will.' [M]ores as to being viewed naked by members of the opposite sex under certain circumstances are bound to change as women become further integrated into the occupational and professional world. The traditional rule that only male guards may view male inmates under these conditions may derive from just the type of stereotypical value system condemned by Title VII. 2
IEEE Transactions on Computational Social Systems, 2020
Motion capture is an important technique with a wide range of applications in areas such as compu... more Motion capture is an important technique with a wide range of applications in areas such as computer vision, computer animation, film production, and medical rehabilitation. Even with the professional motion capture systems, the acquired raw data mostly contain inevitable noises and outliers. To denoise the data, numerous methods have been developed, while this problem still remains a challenge due to the high complexity of human motion and the diversity of real-life situations. In this paper, we propose a data-driven-based robust human motion denoising approach by mining the spatial-temporal patterns and the structural sparsity embedded in motion data. We first replace the regularly used entire pose model with a much fine-grained partlet model as feature representation to exploit the abundant local body part posture and movement similarities. Then, a robust dictionary learning algorithm is proposed to learn multiple compact and representative motion dictionaries from the training data in parallel. Finally, we reformulate the human motion denoising problem as a robust structured sparse coding problem in which both the noise distribution information and the temporal smoothness property of human motion have been jointly taken into account. Compared with several state-of-the-art motion denoising methods on both the synthetic and real noisy motion data, our method consistently yields better performance than its counterparts. The outputs of our approach are much more stable than that of the others. In addition, it is much easier to setup the training dataset of our method than that of the other data-driven-based methods.
IEEE Internet of Things Journal, 2019
He received the Ph.D. degree in Computing and Mathematics and the B.Sc. degree (1st Class Hons.) ... more He received the Ph.D. degree in Computing and Mathematics and the B.Sc. degree (1st Class Hons.) in Computer Science from the University of Bradford, United Kingdom, in 2010 and 2006, respectively. His expertise is on networking and his main research interests include intelligent networking technologies, network slicing and softwarization, future Internet architecture and technologies, Green networking, wireless networks, network security and privacy, and analytical modelling and performance optimization. He is an Editor of IEEE Transactions on Network and Service Management, Elsevier Computer Networks and IEEE Access. He contributes to major conferences on networking as various roles including a Steering Committee Chair, a General Chair, a Program Chair, and a Technical Program Committee Member.
Materials Science Forum, 2018
The article oversees the topicality of an appropriate strength assessment of bonding of steel rei... more The article oversees the topicality of an appropriate strength assessment of bonding of steel reinforcing rod with concrete. It is shown that in the technology of reinforcing concrete framing, metal reinforcing has seen a new alternative in the form of fiberglass, basalt plastic reinforced polymer and carbon fiber. Efficiency of application of reinforcing construction made of composite materials includes not only increased corrosion resistance, but also better compatibility of materials in strength and deformation properties. The article suggests experimental evaluation of the adhesion of the steel reinforcing with concrete to account for its real nature.
Journal of Food Processing and Preservation, 2019
The common chameleon Chamaeleo chamaeleon is a Mediterranean lizard which has been introduced in ... more The common chameleon Chamaeleo chamaeleon is a Mediterranean lizard which has been introduced in many islands and its native origin in European countries is debated. Chameleons have been introduced in southern Italy, possibly from the Middle East and Tunisia. We conducted genetic analyses on mitochondrial DNA 16S gene on a larger sample. We observed a multiple origin for the Salento (Apulia, southern Italy) population, with individuals phylogenetically related to populations of North Africa and two areas in the Middle East. Some individuals may have been released before the 1950s and some others in the 1980s, improving the establishment success of this species.
We compared performance of a novel encoding Lempel-Ziv complexity (ELZC) with approximate entropy... more We compared performance of a novel encoding Lempel-Ziv complexity (ELZC) with approximate entropy (ApEn), sample entropy (SmpEn) and permutation entropy (PerEn) as nonlinear metric to assess ECG quality. Firstly to compare performance of discerning randomness and inherent nonlinear properties within time series, this study calculated the aforementioned four nonlinear complexity values on several typical artificial time series i.e., Gauss noise, two kinds of noisy time series, two kinds of Logistic series and periodic series, respectively. Then for analyzing sensitivity of the aforementioned four complexity methods to content level of different types noise within ECG recordings, we investigated variation trend of ELZC, ApEn, SmpEn and PerEn in several synthetic ECG recordings containing different types noise (i.e., baseline wander, muscle artefacts, electrode motion, power line and mixed noise) and different signal noise ratios (i.e., 15, 10, 5, 0, −5 and −10 dB). Finally...
La llengua catalana entre la codificació i I'estandardització* per Xavier lamuela En els últims q... more La llengua catalana entre la codificació i I'estandardització* per Xavier lamuela En els últims quaranta anys els sistemes de relacions socials han canviat d'una manera radical i arnb ells el funcionament i la forma de les llengües implicades en aquestes relacions. En els últims quaranta anys la llengua catalana ha estat curosament exclosa dels imbits d'ús més ex~lícitament actius en el ~r o c é s de canvi social a que em refereixo, aquells que, com els mass media, són paradigmitics en la difusió de models de comportarnent i, per tant, de models linaiístics. " Ara ens deixen creure-i hem de creure i desesperadament volem creureque la sort ha canviat. Hi ha el fet efectiu que l'ús de la llengua catalana, ben
Organization Studies, 2006
In this paper we argue that organizational culture is an important factor influencing relationshi... more In this paper we argue that organizational culture is an important factor influencing relationship skills, defined as a firm’s ability and behavioral tendency to actively cultivate and manage its ties with other firms. Testing our model on a sample of 102 inter-firm relations, we find that firms with organizational cultures characterized by an orientation towards stability and predictability, a positive orientation towards innovation, and not characterized by a strong focus on immediate results, score high on relationship skills. Relationship skills, in turn, positively affect the perceived relationship performance.
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Papers by Maria Luisa Vannuccini