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Effect of Cu Incorporation on Structure, Densification and Magnetic Properties of Polycrystalline LixNi0.2Zn0.8-2xFe2+xO4Ceramics

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Journal of Applied Mathematics and Physics 2021年第12期9卷 3211-3229页

作者： Halima akter Liya ruhina akter Abdul Ahad M. N. I. Khan M. J. Miah Department of Physics Comilla University Cumilla Bangladesh Materials Science Division Bangladesh Atomic Energy Commission Dhaka Bangladesh

The polycrystalline LixNi0.2Zn0.8-2xFex+2O4 and LixNi0.1Cu0.1Zn0.8-2xFex+2O4 (x = 0.0, 0.1, 0.2, and 0.3) ferrites were synthesized by the standard solid-state reaction method. The compound was sintered at 1150˚C for 5 hours. The effect of Cu substitution and its impact on the crystal structure, microstructure, complex initial permeability and magnetization of the Ni-Zn ferrites were studied. The effect of Li+ incorporation on the properties mentioned above was also investigated. X-ray diffraction patterns of the samples indicated a single cubic spinel structure for both the compound. No effect of Cu addition on crystal structure was observed. The density of the ferrites was found to be enhanced because of adding Li whereas the porosity of the samples decreased with the content of Li ions. The average value of grain size increased with the addition of Li content. The samples having Cu ions formed bigger size grains. Frequency-dependent complex initial permeability, loss tangent, and relative quality factor were studied at room temperature using an Impedance analyzer in the range of 100 Hz - 120 MHz regions. In the low-frequency region, the prepared samples exhibited a high value of permeability and after a certain frequency, the permeability falls. The value of permeability enhanced with the increase in Li whereas loss tangent was found to be reduced. The relative quality factor graphs described that the compound has excellent frequency stability up to a certain frequency which is suitable to be used in inductors, resistors, capacitors, etc. Initial permeability for LixNi0.1Cu0.1Zn0.8-2xFex<

关键词： Ceramics Ferrites Complex Initial Permeability Saturation Magnetization

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Self-Discovery anda Sense of Wholeness in the Transgressive Auto/biogrAfrical Discourses of African American Women Writers

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Fudan Journal of the Humanities and Social Sciences 2022年第1期15卷 143-158页

作者： U.H.ruhina Jesmin English Discipline Khulna UniversityKhulna 9208Bangladesh

The paper attempts to explore selected African American women writers'(Zora Neale Hurston,Maya Angelou,Audre Lorde,and Alice Walker)self-discovery,celebration of their selfhood,and sense of wholeness in their auto/biogrAfrical *** rhetoricity of the autobiographers reflects politicization of black women's struggle,cultural(de)construction,and feminist/womanist(re)construction Instead of fitting into heteronormative discourses and aprocess of cultural assimilation,and of adhering to cultural codes of femininity,these writers transgress traditional norms of behavior Through autobiographical manifestos interwoven with self-defining identity and artistic transgression they powerfully assert notions of collective female agency and embrace their new-found identity as feminist *** an agent of awareness and proclamation,their(except Hurston's)powerful rhetoric is infused with their triple consciousness of being a black woman with African background and cultural *** illustrate an interconnectedness of racism and sexism which causes double oppression on black *** boldly raise racial issues of universal significance,stick to their authentic selves,and reaffirm their agonizing black history/past as they journey toward maturity and *** discourses reflect an interweaving of past and present,individual and community,and personal and political changes which lead them toward an esthetic paradigmof wholeness.

关键词： Auto-biogrAfrican discourse Transgression Self-discovery Wholeness Female agency

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Overview of a Cycle of Predicament： A Comparative Study Between Shylock and Heathcliff Cyclic Process of Victimization

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Journal of Literature and Art Studies 2012年第8期2卷 779-784页

作者： U. H. ruhina Jesmin Khulna University Khulna Bangladesh

This paper attempts to explore how Shylock in William Shakespeare＇s The Merchant of Venice （1995） and Heathcliff in Emily Bronte＇s Wuthering Heights （2003） were victimized who became victimizer later to heal their wound and compensate their loss and how they were victimized in turn in doing so. Shylock was victimized by the Christian society along with his own. His daughter left him in favor of the Christians. He later became a victimizer but was ironically victimized in turn in wreaking vengeance on his foes in the court. Similarly, Heathcliffs true spiritual love was rejected by His Catherine, neglected by everyone, physically and mentally abused. Later, he wreaked vengeance upon his foes but was victimized to death in turn. Shylock entered the court as a victimizer but left it as a victimized individual just as Heathcliff entered the Heights, after self-imposed exile, as a victimizer and left it as a victimized individual for good. Therefore, both of them experienced a cycle of victimization.

关键词： trauma marginalization victimized victimizer self-victimization

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Eros and Thanatos in the Psychical Process of Paul Morel： Diversity in Paul＇s Psyche

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Journal of Literature and Art Studies 2012年第5期2卷 538-543页

作者： U. H. ruhina Jesmin Khulna University Khulna Bangladesh

This paper attempts to analyze Paul Morel＇s instinctual drives--in D. H. Lawrence＇s Sons and Lovers （2006}---toward survival, neurotic refusal to accept life, and his will to give life meaning after a fierce and prolonged internal strife--in the light of psychoanalysis. It will explore how his ＂Id＂ strives to bring about the satisfaction of instinctual needs on the basis of the pleasure principle driving him to seek pleasure. His ＂libido＂--psychic energy, emanating from the id, especially the sexual urge--has empowered his ＂Eros＂ or life instinct. It will also explore how ＂Thanatos＂ or death instinct, in contrast, has yearned for an almost lifeless state and curbed entering into human relationships as experienced in his last rejection of Miriam after his mother＇s death leaving a great trauma on Paul who has been on the verse of extinction as a result. Therefore, Eros and Thanatos, both coincide and conflict within him, are dynamically involved and thus are interacted infusing life not stagnation in Paulin consequence

关键词： internal strife Eros Thanatos instinctual drives transference

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A Psychoanalytic Insight Into Blanche in A Streetcar Named Desire Psychic Strength From Defense Mechanism

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Journal of Literature and Art Studies 2012年第3期2卷 404-409页

作者： U. H. ruhina Jesmin Gono University Dhaka Bangladesh

This paper attempts to analyze Blanche＇s psyche in relation to her employing defense mechanism to restore her mental health and herself in A Streetcar Named Desire （1947） by the American playwright Tennessee Williams. It focuses on her replacing reality with fantastic embodiments or illusion. She has taken unacceptable impulses into acceptable forms by unconsciously blocking the impulses such as superego and thereby reducing agony for the earlier traumatic experiences left indelible marks on her mind, and anxiety for survival. Her anxiety becomes too overwhelming that her ego urgently employs defense mechanisms to protect her. With her new hopes and dreams she desires to replace the highly stressful loss. Under mental and social stress, her illusion and her falsification of reality nevertheless became unable to overcome recurring trauma-causing situation in reality and her healing process thereby leaving her on the verge of extinction.

关键词： trauma defense mechanism itlusion denial rationalizationIntroduction

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Continual Process of Self-Making： Hester Prynne＇s Life Is an Instance of Sublimation

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Journal of Literature and Art Studies 2012年第4期2卷 471-475页

作者： U. H. ruhina Jesmin Gono University Dhaka Bangladesh

This paper attempts to demonstrate Hester Prynne＇s, in Nathaniel Hawthorne＇s romantic work of fiction The Scarlet Letter （1994）, sublimation of her sexual impulses into identifying with the socially acceptable humanitarian actions, and societal demands in order to avoid the confrontation with the scorn of the people of Boston, her sexual urge, and with her weakness. Hester＇s libidinal energy was channeled into socially approved activities in her self-devoted years that made up her identity and reality. The scarlet letter ceased to be a stigma which once attracted the world＇s scorn and bitterness, later looked upon with reverence, and transformed into a thing to be sorrowed over. She had not ignored a large part of reality of her life （the past and present）. If she ignored her past she would entirely detach it from the present. She integrated her stigma into her life in the continual process of self-making, and thereby projecting herself into the future

关键词： adultery reality defense mechanism sublimation meaning

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