Opposite Pairs Research Articles

The heterogeneous effects of human development and good governance on mobile diffusion in the sub-Saharan region: Evidence from panel quantile regression

This methodological-theoretical study aims to tackle the predominant assumption of mobile diffusion studies that relies too much on technological determinism by implementing various composite indices measuring qualitative factors such as human development and good governance through panel quantile regression with fixed effect in the context of the sub-Saharan region. Our statistical results show that the effect of the independent variables on mobile diffusion is heterogeneous across quantiles. Specifically, (a) the effect of human development is positively associated with all quantiles, which supports the legitimacy of inclusion of qualitative factors when understanding mobile diffusion of the sub-Saharan region; and (b) the results also show that government capacity to create a better environment for business on mobile diffusion is clearly heterogeneous, and the effects are mixed. This study is to provide associational evidence between mobile diffusion and various qualitative indicators through social constructivists' perspectives. The results indicate that it is not necessary to see technological determinism and the social construction of technology as a pair of absolute opposites. Rather, heterogeneous variables from both sides can be mixed to discover new understandings of the impacts of technology diffusion.

Transmission structured illumination microscopy with tunable frequency illumination using tilt mirror assembly

We present experimental demonstration of tilt-mirror assisted transmission structured illumination microscopy (tSIM) that offers a large field of view super resolution imaging. An assembly of custom-designed tilt-mirrors are employed as the illumination module where the sample is excited with the interference of two beams reflected from the opposite pair of mirror facets. Tunable frequency structured patterns are generated by changing the mirror-tilt angle and the hexagonal-symmetric arrangement is considered for the isotropic resolution in three orientations. Utilizing high numerical aperture (NA) objective in standard SIM provides super-resolution compromising with the field-of-view (FOV). Employing low NA (20X/0.4) objective lens detection, we experimentally demonstrate sim (0.56 mmtimes0.35 mm) size single FOV image with sim1.7- and sim2.4-fold resolution improvement (exploiting various illumination by tuning tilt-mirrors) over the diffraction limit. The results are verified both for the fluorescent beads as well as biological samples. The tSIM geometry decouples the illumination and the collection light paths consequently enabling free change of the imaging objective lens without influencing the spatial frequency of the illumination pattern that are defined by the tilt-mirrors. The large and scalable FOV supported by tSIM will find usage for applications where scanning large areas are necessary as in pathology and applications where images must be correlated both in space and time.

Real-time hardware-in-loop based open circuit fault diagnosis and fault tolerant control approach for cascaded multilevel inverter using artificial neural network

Multilevel inverters (MLI) are finding widespread in various engineering and commercial applications owing to their immense performance. The cascaded H-bridge (CHB) inverter is the most potential MLI topology for renewable energy applications. The successful operation of the CHB-MLI depends on the integrity of the semiconductor devices and capacitors. Irrespective of its benefits the huge number of switches decreases the reliability of the inverter. Concerning reliability, this article proposes a fault-tolerant (FT) CHB MLI for solar photovoltaic applications. The proposed CHB MLI can withstand both the single and multiple open circuit faults in all the H-bridges of the CHB topology. The diagonally opposite switch pairs of CHB topology have similar fault features which lead to difficulty in finding the fault switches using the analytical fault diagnosis methods. Hence an artificial intelligence (AI) based fault diagnosis (FD) and FT operation of CHB MLI are interpreted. The proposed model offers complete FD and FT operation within one fundamental cycle which is advantageous relative to the existing methods. Compared to the existing methods, the proposed AI-based fault diagnosis strategy achieves a shorter diagnosis time and provides 96% classification accuracy between various fault conditions. Further, the simulation and HIL results demonstrated that the voltage magnitude and THD have been maintained at 8.24% before and after the fault state. In addition, the suggested FT structure ensures the constant output power over the post-fault operation for both single and multiple switch failure instances while improving the MLI resilience. The feasibility and performance of the proposed method have been investigated through related case studies using simulation and hardware-in-the-loop (HIL) tests on a single-phase fifteen-level CHB MLI.

The Witch in Flight

The Witch in Flight

The barycentric model of determining the sustainable growth determinants

The authors investigate the issue of modelling the balance of sustainable growth determinants based on determining the center of mass. They have identified the most relevant factors that characterize countries' social, economic, and political spheres, digital capability, and cybersecurity to determine sustainable development and growth. The research has been carried out based on empirical values of the selected 17 indicators for 127 world countries in 2018. As a result, the four–pole barycentric models were built as quadrangles, the vertices of which are composite targets formed by the determinants of the four spheres. The models' calculations were carried out taking into account three components: the values of the composite targets (as a geometric mean), the level of pairs balance (as the sum of opposite pairs of quadrilateral angles), and all four targets (as the distance between the actual and standard value of the center of mass). According to the analysis result of the first component, developed countries have the most effective targets (top five – Switzerland, Denmark, Norway, Finland, and the Netherlands). Research of the results of the second component has revealed an imbalance in target pairs for most countries. Determinants of socio–political development are the most effective for developed countries. The economic sphere is most unbalanced for the least developed countries. Various determinants can cause an imbalance for developing and new industrial countries. The analysis of the center of mass distances revealed that not only developed countries could be balanced, but also developing, new industrial and the least developed, which indicates a balanced development of their determinants, which is pretty slow. New Zealand, Mauritius, South Africa and Mali were the most balanced in each country's sustainable growth group.

ГЕНДЕРНА ТЕРМІНОЛОГІЯ В ПРОЄКЦІЇ НА ПРАЦІ ІВАНА ОГІЄНКА

Modern Ukrainian society strives for the formation of gender equal rights for men and women, which should be manifested at the level of social needs, as well as at the level of consciousness. The living word is a mirror that projects a verbal refl ection of a person’s intellectual level, his emotional and mental state, which passes through all the fi lters of consciousness. It is also important to skillfully and appropriately use terms, tokens, and understand the lexical structure of the language. The concept of feminine/masculine is the subject of scientifi c studies in the aspect of linguistic, literary, sociocultural, biological, etc. Scientists distin-guish the represented opposition from the opposition of female/male, or identify these oppositional pairs. Pavlychko S. confi rms that the sex/gender pair cre-ates an opposition that contains a radical diff erence between the two members. Gender does not always follow sex, the body of a man or woman does not neces-sarily correspond to the cultural construction of «woman», «man». Summarizing her statements and researching the works of I. Ohiienko, we come across the terms of the word-forming series related to femininity. Femininity is a larger dimension, of which certain gender stereotypes are a part, because femininity is an ethical-aesthetic category that denotes the personal, aesthetic, and socio-psy-chological qualities expected of women by culture and describes the normative standards of the ideal woman. We present the following comments in the article: comments by Ivan Ohiienko regarding the state of the Ukrainian language and the idea of femininity in it; Professor Ivan Ohiienko writes about the evolution of the genus category; Ivan Ohiienko uses the borrowed term “feminize” and explains it as the Ukrainian equivalent of «ozhinochyty» (to make feminine); Ivan Ohiienko uses and describes the term «law of feminization»; Ivan Ohiienko, having studied gender pairs in natural language, points out that the process of feminization of language occurs much more often than masculinization; Ivan Ohiienko comments on the spelling of 1945, which forcibly stopped the process of feminization (making feminine) of the genus in the Ukrainian language; in the book «Ridna Mova» («Mother Tongue») a separate section is devoted to the description of the role of women in Ukrainian society; a woman, according to the scientist Ivan Ohiienko, has a duty to speak her native language. A woman in the works of Ivan Ohiienko appears socially signifi cant, which causes the actu-alization of the problem of researching the derivational subsystem of nouns with the modifying meaning of the feminine gender (feminitives) in the Ukrainian language and a certain objection to their normative use in the modern Ukrainian.

Sosyal Bilgiler Eğitiminde Ortaokul Öğrencilerinin Adalet Değerine İlişkin Bakış Açılarının Karşıtlık Temelinde İncelenmesi

The aim of this study is to investigation the perspectives of secondary school 7th grade students on the value of justice through the principle of versus. In order to achieve this aim, phenomenology research design was used. Data were collected through semi-structured interview form and various documents (poetry and drawing). Participants consisted of 8 students selected from 7th grade students studying at a public secondary school in the 2020-2021 academic year. The data were analyzed in terms of versus coding, which identifiy mutually exclusive, opposite word pairs. According to the students, it has been determined that the unchanging essences/structures of the justice value are “meeting the need for safety”. In this context, it was concluded that the students took refuge in the value of justice as a guarantee of seeing their future safe. Therefore, it can be said that the students think that in the absence of the value of justice may affect fulfilling their safety needs. In addition, according to the students, it was concluded that the value of justice enables to build “social order versus social disorder”. According to the students, the value of justice is described as follows: “Justice is a value consisting of fairness, sovereignty of the state and social unity in order to meet the safety needs of the society. The ultimate aim of ensuring justice; is the construction of social order so that social turmoil does not occur.”

Ethnopharmacological review of vinca plant for anticancer activity

The strive of this assessment shows that Vinca rosea, many obviously grown vegetation round us which can be used for medicinal purposes. It has many known names like vinca Rosea, Madagascar periwinkle, vibrant eyes, Cape periwinkle, graveyard plant, old maid, crimson periwinkle, rose periwinkle myrtle. Ayurveda is the Indian conventional device of medication which focuses on the scientific capability of plant life. Catharanthus roseus is one plant recognized nicely in Ayurveda. It is known for its antitumour, anti-diabetic, anti-microbial, anti-oxidant and antimutagenic effects. It is an evergreen plant first originated from islands of Madagascar. The flowers can also range in color from red to pink and leaves are organized in opposite pairs. It produces nearly 130 alkaloids especially ajmalcine, vinceine, resperine, vincristine, vinblastine and raubasin. Vincristine and vinblastine are used for the treatment of various types of cancer such as Hodgkin’s disease, breast cancer, skin cancer and lymphoblastic leukemia. It has high medicinal values which need to be explored considerably. This ethnopharmacological review deals with anticancer activities and pharmacognostic study of Vinca plant.

SHAKESPEARIAN MAN IN THE CONTEXT OF RENAISSANCE IDEAS

William Shakespeare’s writing is characterised by lasting interest in man as a dialectic being. On the one hand, it can be explained by the specific features of the genre chosen by Shakespeare, for both the play (a tragedy, a comedy, a historical chronicle) and the sonnet call for a more intense clash of thesis and antithesis. On the other hand, it is the age that has shaped the notion of man as a being with inner contradictions: Shakespeare wrote his works at a time when an optimistic view of man was gradually replaced by pessimism that is characteristic of the decline of Renais- sance. The paper is devoted to the analysis of interpretation of the image of man that is typical of Shakespeare’s writing. Special attention is paid to the pair of opposites of “man-God” and “man-degenerate of nature”, emphasising daring as a common meas- urement of the value of man in Renaissance. The interpretation of the image of man that is specific to Shakespeare’s writing is viewed in the context of ideas of Renaissance authors: Pico della Mirandola, Dante Alighieri, Giovanni Boccaccio and Christopher Marlowe.

Level sets of potential functions bisecting unbounded quadrilaterals

We study the mixed Dirichlet–Neumann problem for the Laplace equation in the complement of a bounded convex polygonal quadrilateral in the extended complex plane. The Dirichlet / Neumann conditions at opposite pairs of sides are $$\{0,1\}$$ and $$\{0,0\},$$ resp. The solution to this problem is a harmonic function in the unbounded complement of the polygon known as the potential function of the quadrilateral. We compute the values of the potential function u including its value at infinity. The main result of this paper is Theorem 4.3 which yields a formula for $$u(\infty )$$ expressed in terms of the angles of the polygonal given quadrilateral and the well-known special functions. We use two independent numerical methods to illustrate our result. The first method is a Mathematica program and the second one is based on using the MATLAB toolbox PlgCirMap. The case of a quadrilateral, which is the exterior of the unit disc with four fixed points on its boundary, is considered as well.

Mixed convection in a lid driven square cavity using lattice Boltzmann method: Effects of thermal gradient direction and moving lid length

This numerical study investigates the effect of thermal boundary conditions and moving lid length on the mixed convective heat transfer and flow regime dynamics in a square top-lid driven cavity. The numerical simulations are performed using an in-house developed thermal lattice Boltzmann solver. Here, the two cavity walls are defined using the opposite pairs of hot and cold isothermal walls. The rest walls are set as adiabatic with zero thermal flux conditions such that a thermal gradient is established either in the vertical or horizontal direction. Additionally, we have varied the size of the moving top-lid to couple the inertia effect with the thermal gradient and investigated how the mixed convective heat transfer and flow regime are affected in the square lid-driven cavity. Here, the Richardson number () is varied as 0.1, 1.0, and 10.0 to cover a wide range of mixed convective flow situations in the lid-driven cavity. is fixed at 106 in all the cases. Qualitative results of the flow regime and heat transfer characteristics are presented as isotherms and streamline patterns. The quantitative information is analyzed by the conduction-convection characteristics along the cavity centerlines and on the boundary walls. It is intuitive to say that the rate of heat transfer or Nusselt number will be higher for larger moving lid lengths, but this is achieved at the cost of higher driving force estimated by the line integral of the shear stress at the moving wall. Additionally, we have defined an efficiency parameter that can relate the heat transfer rate (Nuhot ) with the fluid friction (Cf ). Furthermore, η helps identify the effective and energy-efficient way to achieve the optimized heat transfer in the lid-driven cavity in the considered parametric range.

Observation of Azimuth-Dependent Suppression of Hadron Pairs in Electron Scattering off Nuclei.

We present the first measurement of dihadron angular correlations in electron-nucleus scattering. The data were taken with the CLAS detector and a 5.0GeV electron beam incident on deuterium, carbon, iron, and lead targets. Relative to deuterium, the nuclear yields of charged-pion pairs show a strong suppression for azimuthally opposite pairs, no suppression for azimuthally nearby pairs, and an enhancement of pairs with large invariant mass. These effects grow with increased nuclear size. The data are qualitatively described by the gibuu model, which suggests that hadrons form near the nuclear surface and undergo multiple scattering in nuclei.These results show that angular correlation studies can open a new way to elucidate how hadrons form and interact inside nuclei.

PEACE AND PERFORMANCE (2P) PARADIGM ON ICT PROFESSIONALS

The two core dependencies of any employee to work happily or even excel in career are Performance and Peace . Peace is defined here as the mental state or stress-free condition for one to use the mind and brain to perform at the optimum level. No one likes to be labeled as a non-performer and no one wants to lose their peace of mind. The need for performance and peace is a natural need in every employee, thus in the new era of human development, following the 2P thirst will be a more suitable and effective method as opposed to forcing and pushing through. The 2P Paradigm wishes to reveal a new vision. The performer and performance should never be separated. Personal Peace and work performance should go together so that the performer performs well. The ultimate aim of Performance is and Peace is an effective means to sustainable Performance In the 2P Paradigm. Both are means and ends. Each is needed and knitted with each other. They are the natural synergizing opposite pairs of order. They should not be separated, like how the protons should not be separated from the electrons in an atom. With the current emphasis on digital economy by the government, ICT organization performance need to be focused. Hence, the 2P paradigm is critically important in ICT organization and department

Flight Simulation and Control of a Quadrotor based on MATLAB/Simulink

Nowadays anyone can fly Unmanned Aerial Vehicle (UAV) and land it according to the specified instructions drafted by the manufacturer. However, the controlling phase is growing day by day as one of the crucial roles of UAV. Obtaining control for autonomous landing is the crucial and critical step. So based on various literature surveys and centering into Industry 4.0, this proposed work deals with image flight simulation and control of Quadrotor, which is an important field of Industry 4.0 in future production and business power. This research is eyed on Quadrotor, a type of flying vehicle with four rotor blades wherein the opposite pairs rotate in alternate direction, which is very useful for vertical take-off and landing. The Quadrotor is created by using CATIA software which is best suited for modelling and developing real time application. The model is extracted in MATLAB/SIMULINK in which a variety of blocks are available under the set of control and aerospace blocks. Then, a suitable simulation environment and controller are made. The advantage of making this proposed work in MATLAB is that it has the features of testing, controlling, and maintaining various operations without equipping any mechanical components, and there is no risk for property or lives.

Non-iterative method for constructing valence antibonding molecular orbitals and a molecule-adapted minimum basis.

While bonding molecular orbitals exhibit constructive interference relative to atomic orbitals, antibonding orbitals show destructive interference. When full localization of occupied orbitals into bonds is possible, bonding and antibonding orbitals exist in 1:1 correspondence with each other. Antibonding orbitals play an important role in chemistry because they are frontier orbitals that determine orbital interactions, as well as much of the response of the bonding orbital to perturbations. In this work, we present an efficient method to construct antibonding orbitals by finding the orbital that yields the maximum opposite spin pair correlation amplitude in second order perturbation theory (AB2) and compare it with other techniques with increasing basis set size. We conclude the AB2 antibonding orbitals are a more robust alternative to the Sano orbitals as initial guesses for valence bond calculations due to having a useful basis set limit. The AB2 orbitals are also useful for efficiently constructing an active space, and they work as good initial guesses for valence excited states. In addition, when combined with the localized occupied orbitals, and relocalized, the result is a set of molecule-adapted minimal basis functions that is built without any reference to atomic orbitals of the free atom. As examples, they are applied to the population analysis of halogenated methane derivatives, H-Be-Cl, and SF6, where they show some advantages relative to good alternative methods.

First report of powdery mildew caused by Phyllactinia pyri-serotinae Sawada on pear (Pyrus communis L.) from India.

In August 2020 powdery mildew was observed on pear cv. Fertility at the University research field in Shalimar, Srinagar (J&K), India (34° 08' 30.5'' N and 74° 51' 42.0'' E) with a disease incidence up to 30% (100 leaves observed from ten trees). White irregularly shaped fungal colonies were observed on the abaxial leaf surface which latter covered the whole leaf surface and developed black chasmothecia. The affected leaves appeared brittle, slightly curved upwards and dropped prematurely. Mycelium was hypophyllous, septate and measured 2.0 to 5.0 μm in width. Appressoria were nipple shaped, solitary or present in opposite pairs. Conidiophores were erect, up to 440.0 µm long (n=50), mostly centrally on upper surface of mother cells. Conidiophore foot-cells were filiform, followed by 1 to 3 shorter cells, producing single conidia at the tip. Conidia were hyaline, lanceolate, with a non-papillate rounded apex, measuring55.5 to 81.4 × 14.8 to 22.5 µm (n=50) and devoid of any conspicuous fibrosin bodies. Germ tube was, filiform, twisted, arose basally and measured 2.0 to 5.0 µm in width. Chasmothecia were hypophyllous, black, scattered, globose and measured 195.0 to 255.0 µm in diameter (n=50) having 8 to 12 equatorial, acicular, up to 270.0 µm length appendages with 25.9 to 44.4 µm diameter bulbous base (n=50) and obtuse or subacute apex. Asci in a chasmothecium were clavate to saccate, 62.9 to 81.4 × 18.5 to 22.2 µm (n=50), stalked, and two- spored. Ascospores were 33.3 to 40.7 × 12.9 to 18.5 µm (n=50), pale yellowish or golden brown in color. All morphological features were consistent with Phyllactinia pyri-serotinae (Braun and Cook 2012). To confirm the fungus identity at molecular level, DNA of two isolates was extracted from chasmothecia. The internal transcribed spacer (ITS) sequence of ribosomal DNA was amplified with the primers ITS1 and ITS4 (White et al. 1990) and sequenced. The ITS sequences submitted to NCBI GenBank under Accession No. MZ505441 and MZ505442 have 97 (416/427) & 96 (424/440) per cent and 99 (424/430) & 98 (428/438) per cent base pair matching, with that of P. pyri-serotinae isolates from Japan (AB080521 and AB985507), respectively. Thus, the pathogen was identified as Phyllactinia pyri-serotinae Sawada based on morphological and molecular sequence analyses. The pathogenicity tests of both the isolates were carried out on one year old pear saplings (cv. Fertility) and repeated twice. The inoculum was prepared by collecting P. pyri-serotinae conidia in sterile distilled water from infected pear leaves. Three saplings were inoculated by spraying (15ml per sapling) the inoculum (3 x 105 spores ml-1) on leaf surfaces, while same number of saplings sprayed with sterile distilled water served as non-inoculated controls. After 15 days of incubation at 25oC in a green house, similar symptoms as observed on naturally infected plants were observed on inoculated plants and uninoculated plants remained symptomless. The pathogen of interest observed on inoculated plants was morphologically characterized and found to be similar to P. pyri-serotinae. The voucher specimen was deposited in the Herbarium Crytogamae Indiae Orientalis (HCIO), IARI, New Delhi under accession number 52213. Pear is the third most important temperate fruit grown in India (Chattopadhyay 2009) and our study reveal P. pyri-serotinae as the new causal agent of powdery mildew in addition to P. guttata (Dhar and Shah 1982) under Indian conditions.

First report of powdery mildew on Astragalus sinicus (Chinese milk vetch) caused by Erysiphe trifoliorum in China.

Astragalus sinicus L., (Chinese milk vetch) is a traditional leguminous green manure that plays a significant role in maintaining paddy soil fertility to enhance yield and the quality of rice in China. It is also found in gardens, roadsides, farms, fields, riverbanks, open wastelands, and is often used as livestock feed. From February 2019 to 2021, severe powdery mildew infections were observed on hundreds of A. sinicus grown in gardens and at roadsides of Fuzhou city, China. The disease incidence was up to 100% on leaves and stems of A. sinicus. White superficial fungal colonies (circular to irregular patches) were present on both sides of the leaves. Hyphae were flexuous to straight, branched, 4 to 8 µm in width, and septate. Hyphal appressoria were lobulate and solitary or in opposite pairs. Conidiophores were erect and straight, hyaline, and 60 to 120 × 8 to 10 µm (n=30). Foot cell was cylindrical, straight to slightly curved, 22 to 38 × 8 to 10 µm, followed by two to three shorter cells. Conidia were cylindrical-oval to doliiform, 30 to 48 × 13.5 to 24 μm with a length/width ratio of 1.6 to 2.4 (n = 30), formed singly, and without fibrosin bodies. Conidial germ tubes were produced subterminal position. No chasmothecia were found in the collected samples. The morphological characteristics of asexual structures were consistent with the descriptions of E. trifoliorum (Wallr.) U. Braun in Braun and Cook (2012). To verify the identification of the pathogen, the ITS and the part of large subunit (LSU) rDNA gene of the isolates were amplified using ITS1/ITS4 and LSU1/ LSU2 primers (Scholin et al. 1994 and White et al. 1990, respectively) and sequences were deposited in GenBank (ITS: MZ021332, MZ021333; LSU: MZ021334, MZ021335). In BLASTn searches, the ITS and LSU sequences were 99 to 100% identical with those of E. trifoliorum parasitic on Lathyrus magellanicus (LC010015), Medicago littoralis (LC270860), Melilotus officinalis (LC009924) and Trifolium spp., (MN216308, KY660821), as well as E. baeumleri (Bradshaw et al. 2021) on Vicia nigricans (LC010014). Pathogenicity test was performed by gently pressing a diseased leaf onto 10 young leaves of three healthy potted plants, while three non-inoculated plants were used as controls. All plants were maintained in a greenhouse at 20 to 25°C, without humidity control, and natural light. Symptoms developed 7 days after inoculation, whereas the control leaves remained symptomless. The morphology of the fungus on the inoculated leaves was identical to that observed on the originally diseased leaves. Powdery mildew on A. sinicus has been reported as E. pisi and E. polygoni from Korea and China (Shin, 2000; Tai 1979), respectively. Amano (1986) listed E. pisi and Microsphaera astragali (now E. astragali) on A. sinicus from China and Japan. To our knowledge, this is the first report of powdery mildew caused by E. trifoliorum on A. sinicus in China and in general. E. astragali is the most common and widespread powdery mildew species on Astragalus spp. (Braun and Cook 2012) and would be expected on A. sinicus, but this species is genetically clearly different from E. trifoliorum (Bradshaw et al. 2021). The E. trifoliorum complex (clade) is composed of several morphologically well-distinguishable species, besides E. trifoliorum also including E. baeumleri (on Vicia spp.), E. hyperici (on Hypericum spp.), and E. euonymi (on Euonymus spp.), but based on a combination of sequence plus host identity, the collection on A. sinicus can be assigned to E. trifoliorum (Bradshaw et al. 2021). The information in this study extended the host range of E. trifoliorum as well as future studies on A. sinicus in relation to powdery mildew outbreaks in China.

Transformation through transcendence

Today, personal biographies are characterized by incoherence. Lack of coherence indicates a discontinuity in values. With contradictory values, one will battle against another, and fight until defeat or victory. Regardless of which values we choose, they have a shadow, unrecognized or neglected aspects that will take over when the values become too extreme or one-sided. According to authoritarian leaders, neutral facts cause no spontaneous change in people, their opposition has to be made negative enough to become alive, seen as the driving force behind fanaticism and public opinion. Instead of the sometimes violent destruction of evaluative values, the transformative role of their descriptive counterparts is highlighted in this paper: transformation of values is possible through the transcendence of pairs of descriptive opposites.

Michèle Morgan and Henri Vidal as star couple (1949–1959): an unusual case of gender and class imbalance

ABSTRACT Both on and off screen, the Michèle Morgan–Henri Vidal star couple was a pair of opposites. Morgan personified an ethereal femininity on screen, but she chose as her partner the most athletic and virile actor in France, and they became one of the most glamorous French couples of the time. The quintessence of ‘quality’ cinema, Morgan accumulated successes, while Vidal was often consigned to B-movies and supporting roles. Both publicly and on screen, Vidal was perceived as Michèle Morgan’s husband more than she was seen as his wife, a role reversal that was rare for the era. The films’ mise en abyme of their real-life relationship widened the gap between them, reproducing it as class difference punished by death, the loss of a child or alcoholism, all of which strangely echoed their private lives. The relative failure of these films is certainly related to the way that the actors’ image as a couple and the fictional stories built around it clashed with the dominant representations of the time. In order to understand these paradoxes, this article will study the couple’s bittersweet relationship in fact and in fiction, both in their films and via their reception in the media.

New dualities in convex quadrilaterals

In [1] de Villiers points out the duality between sides and angles of quadrilaterals. The first objective of this article is make explicit two new dualities in the quadrilaterals. For this we will consider the diagonal segments: if diagonals AC and BD of a quadrilateral ABCD intersect at O, we call the diagonal segments OA, OB, OC, OD. According to [2, pp. 179-188], hierarchical classifications of the convex quadrilaterals are made taking as classification criteria the quantity and position of sides, angles and diagonal segments. In hierarchical classifications the more particular concepts form subsets of the more general concepts. Through classification according to the number and position of equal sides it is possible to define six families: four sides equal, at least three equal, two opposite pairs equal, two consecutive pairs equal, at least one opposite pair equal, at least one consecutive pair equal. In the families two opposite pairs equal and two consecutive pairs equal, the pairs may be equal to each other and then the four sides are equal. So in these two families the possibility DA = AB and AB = BC is excluded. Families analogous to the previous ones can be defined taking as a criterion of hierarchical classification the quantity and position of equal angles or the quantity and position of equal diagonal segments.