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Female delayed mating and shortened pairing duration reduce the reproductive performance of tea mosquito bugs ( Helopeltis bradyi)

Indriani Feberati Putri Suputa Suputa Alan Soffan
Journal of Plant Protection Research | 2023 | vol. 63 | No 4 | 468-473 | DOI: 10.24425/jppr.2023.147831
Keywords delay mating Helopeltis bradyi pairing duration reproduction
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Abstract

Tea mosquito bugs (TMB; Helopeltis bradyi, Hemiptera, Miridae) are a main pest in tea and cacao plantations worldwide. Pheromone-mediated mating disruption (MD) is a promising strategy to manage TMB populations. Experiments were conducted to evaluate the simultaneous effect of TMB female delayed mating (1, 3 and 5 days delayed mating) and pairing duration (1 day, 5 days, and entire lifespan) on several reproductive parameters. Results showed that female delayed mating obviously affected egg number, egg viability, and offspring number, but male delayed mating did not show such effects. Shortened pairing durations had a significant effect on egg viability and offspring number but not on egg number. Increased delayed mating and pairing duration negatively affected adult longevity. In general, we noted that TMB reproductive performance is vulnerable to delayed mating and shortened pairing durations, thus providing essential guidance for the implementation of MD strategies of TMB in the field.
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Authors and Affiliations

Indriani Feberati Putri
1
Suputa Suputa
1
Alan Soffan
1
ORCID: ORCID
  1. Department of Plant Protection, Universitas Gadjah Mada, Yogyakarta, Indonesia

Risk evaluation method based on set pair analysis applied to overseas mining investment

Zhaoyang Ma Guoqing Li Nailian Hu Di Liu
Gospodarka Surowcami Mineralnymi - Mineral Resources Management | 2018 | vol. 34 | No 4 | 145-164 | DOI: 10.24425/122591
Keywords set pair analysis risk evaluation 5-element connection number set pair potential adjacent connection number
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Abstract

Overseas mining investment generally faces considerable risk due to a variety of complex risk factors. Therefore, indexes are often based on conditions of uncertainty and cannot be fully quantified. Guided by set pair analysis (SPA) theory, this study constructs a risk evaluation index system based on an analysis of the risk factors of overseas mining investment and determines the weights of factors using entropy weighting methods. In addition, this study constructs an identity-discrepancycontrary risk assessment model based on the 5-element connection number. Both the certainty and uncertainty of the various risks are treated uniformly in this model and it is possible to mathematically describe and quantitatively express complex system decisions to evaluate projects. Overseas mining investment risk and its changing trends are synthetically evaluated by calculating the adjacent connection number and analyzing the set pair potential. Using an actual overseas mining investment project as an example, the risk of overseas mining investment can be separated into five categories according to the risk field, and then the evaluation model is quantified and specific risk assessment results are obtained. Compared to the field investigation, the practicability and effectiveness of the evaluation method are illustrated. This new model combines static and dynamic factors and qualitative and quantitative information, which improves the reliability and accuracy of risk evaluation. Furthermore, this evaluation method can also be applied to other similar evaluations and has a certain scalability.

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Authors and Affiliations

Zhaoyang Ma
Guoqing Li
Nailian Hu
Di Liu

Leaving for Germany under Au-pair program

Elżbieta Kaleciak
Studia Socjologiczne | 2010 | No 1 | 107-125
Keywords Au-pair program economic capital cultural capital social capital
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Abstract

The article presents one of contemporary forms of Polish migration to other countries enabling migrants to gain new skills and experiences, namely the migration of Polish women taking part in the Au-pair program. The analyzed data were gathered through in-depth interviews with former participants of the Au-pair program in germany – one of the main destinations of this kind of migration from Poland.

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Authors and Affiliations

Elżbieta Kaleciak

The correlation of water quality parameters over wireless sensors generated dataset in the Sitnica River in Kosovo

Figene Ahmedi Shkumbin Makolli
Journal of Water and Land Development | 2023 | No 59 | 8-12 | DOI: 10.24425/jwld.2023.147223
Keywords monitoring parameters’ pair regression analysis water quality wireless sensors
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Abstract

In this paper, the regression analysis technique is applied to a large water quality dataset for the Sitnica River in Kosovo. It has been done to assess the correlation between water quality parameters. The data are generated by a wireless sensors network deployed in Sitnica. A regression analysis is applied to four water quality parameters: temperature, dissolved oxygen, pH, and electrical conductivity. The correlation between each pair of parameters has been assessed by using the WEKA software package, which is a popular time-saving tool for data analysis in distinct domains. The data are pre-processed to exclude out-of-range values and then the assessment of correlation for the pairs of parameters is applied. In comparison to other pairs of water quality parameters, the results show that dissolved oxygen and electrical conductivity correlate particularly closely with temperature. Regression equations of these two pairs of parameters may provide inferred information on dissolved oxygen and electrical conductivity about the Sitnica River. Such information may otherwise not be available to resource managers in Kosovo. Moreover, due to its easy to use and availability as an open-source software, WEKA may aid decision-makers on the management providing almost real-time information about surface water quality within the basin. This can be particularly useful especially in the case of continuous observation of water quality and a huge dataset gathered by using wireless sensors.
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Authors and Affiliations

Figene Ahmedi
1
ORCID: ORCID
Shkumbin Makolli
1
ORCID: ORCID
  1. The University of Prishtina, Faculty of Civil Engineering, Hydrotechnic Department, Rr. Agim Ramadani, ndërtesa e “Fakultetit Teknik”, 10000 Prishtina, Kosovo

Improving Security of Existentially Unforgeable Signature Schemes

Mariusz Jurkiewicz
International Journal of Electronics and Telecommunications | 2020 | vol. 66 | No 3 | 473-480 | DOI: 10.24425/ijet.2020.131901
Keywords Digital signature scheme (DSS) strongly unforgeable DSS pairing
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Abstract

In this paper we present a family of transforms that map existentially unforgeable signature schemes to signature schemes being strongly unforgeable. In spite of rising security, the transforms let us make a signature on a union of messages at once. The number of elements in this union depends on the signing algorithm of a scheme being transformed. In addition to that we define an existentially unforgeable signature scheme based on pairings, which satisfies all assumptions of the first part and is able to be subjected to transformation.

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Authors and Affiliations

Mariusz Jurkiewicz

Impact of gear rim narrowing angle on the temperature and sound pressure of Beveloid gear pair made of polymeric materials

Piotr Strojny
Bulletin of the Polish Academy of Sciences Technical Sciences | 2021 | 69 | 5 | e138818 | DOI: 10.24425/bpasts.2021.138818
Keywords helical transmissions operation polymeric materials sound pressure the operating temperature of a Beveloid gear pair
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Abstract

The paper contains a description of the geometry of Beveloid gears. It describes the distribution of forces in a Beveloid gear with a straight tooth line and a helical tooth line. The paper presents research on the experimentally determined parameters of transmission operation, including the sound pressure level and the amount of heat emitted during operation. The design and construction of the test stand were presented. The research methodology was described. Operational tests are carried out on household appliances with Beveloid gears: Grinder and Jam mixer. Thanks to an appropriately selected narrowing angle, estimated values of service life extension of the above-mentioned transmissions are given.
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Bibliography

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  17.  M. Sobolak and P. Strojny, “Effect of the narrowing angle in beveliod gear on the temperature profile on the active flank of tooth,” Adv. Sci. Technol. Res. J., vol. 7, pp. 67–69, Dec. 2013.
  18.  M. Płocica and A. Marciniec, Methodology of Preparing Hypoid Gears for Vibroacoustic Diagnostics in Laboratory Conditions, Oficyna Wydawnicza Politechniki Warszawskiej, Warszawa, 2018.
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Authors and Affiliations

Piotr Strojny
1
  1. The Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

Quantum magnetostriction effect resulting from the asymmetric structure of matter measured with EPR spectrometer

Marek Sikoń Ewa Bidzinska
Bulletin of the Polish Academy of Sciences Technical Sciences | 2023 | 71 | 1 | e144575 | DOI: 10.24425/bpasts.2023.144575
Keywords atomic arm of action non-paired electron/nucleon polar rotation Cosserat mechanics EPR
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Abstract

This paper explains the rotation and displacement as well as the couple and force stress in material with unpaired electrons/nucleons subjected to a magnetic field. This phenomenon is described in terms of quantum mechanics for nanoparticle and quantum statistical mechanics for loose nanomaterial. Quantitative calculations are carried out based on experimental data collected under the magnetic field of an EPR spectrometer from a set of nanocrystallites of hydrated copper sulfate.
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Authors and Affiliations

Marek Sikoń
1
ORCID: ORCID
Ewa Bidzinska
2
  1. Cracow University of Technology, Kraków, Poland
  2. Jagiellonian University, Kraków, Poland

Binary Tree Based Forward Secure Signature Scheme in the Random Oracle Model

Mariusz Jurkiewicz
International Journal of Electronics and Telecommunications | 2021 | vol. 67 | No 4 | 717-726 | DOI: 10.24425/ijet.2021.137868
Keywords forward secure digital signature scheme bilinear pairing of Type 3 random-oracle model bilinear Diffie-Hellman inversion problem
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Abstract

In this paper we construct and consider a new group-based digital signature scheme with evolving secret key, which is built using a bilinear map. This map is an asymmetric pairing of Type 3, and although, for the reason of this paper, it is treated in a completely abstract fashion it ought to be viewed as being actually defined over E(Fqn)[p] × E(Fqnk )[p] → Fqnk [p]. The crucial element of the scheme is the key updater algorithm. With the adoption of pairings and binary trees where a number of leaves is the same as a number of time periods, we are assured that an updated secret key can not be used to recover any of its predecessors. This, in consequence, means that the scheme is forward-secure. To formally justify this assertion, we conduct analysis in fu-cma security model by reducing the security of the scheme to the computational hardness of solving the Weak ℓ-th Bilinear Diffie-Hellman Inversion problem type. We define this problem and explain why it can be treated as a source of security for cryptographic schemes. As for the reduction itself, in general case, it could be possible to make only in the random oracle model.
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Bibliography

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[13] S. Hohenberger and B.Waters, ”New Methods and Abstractions for RSA-Based Forward Secure Signatures”, in International Conference on Applied Cryptography and Network Security, M. Conti, J. Zhou, E. Casalicchio and Angelo Spognardi, Eds. 2020, pp. 292–312.
[14] G. Itkis, and L. Reyzin, ”Forward-secure Signatures with Optimal Signing and Verifying”, in Advances in Cryptology - CRYPTO ’01, 21st Annual International Cryptology Conference, J. Kilian, Ed. 2001, pp. 332–354.
[15] M. Jurkiewicz, ”Improving Security of Existentially Unforgeable Signature Schemes”, International Journal of Electronics and Telecommunications, vol. 66, no. 3, pp. 473–480, 2020, doi: 10.24425/ijet.2020.131901.
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Authors and Affiliations

Mariusz Jurkiewicz
1
  1. Faculty of Cybernetics, Military University of Technology, Warsaw, Poland

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